阅读说明：本技术 流化小球储热的高炉冲渣水余热发电系统 (Blast furnace slag flushing water waste heat power generation system with fluidized small balls for heat storage ) 是由 周托 张杨鑫 王志宁 黄德洪 张扬 张海 于 2020-12-09 设计创作，主要内容包括：本发明公开了一种流化小球储热的高炉冲渣水余热发电系统,发电系统包括：高炉冲渣单元,高炉冲渣单元包括依次连接的冲渣冷水池、冲渣装置、冲渣热水池；储热及换热单元,储热及换热单元包括流化小球储热器、换热器、蒸发器、过热器；有机工质膨胀发电单元,有机工质膨胀发电单元包括膨胀机和发电机；有机工质冷却及压缩单元,有机工质冷却及压缩单元包括回热器、冷凝器、压缩泵。由此,通过本申请的发电系统,可以利用高炉冲渣水的余热加热有机工质进行发电,从而能够避免余热资源的浪费,可以实现余热资源的高效利用,也可以防止污染环境,同时,不需要改变高炉冲渣的水淬工艺,从而不会影响炉渣的最终活性,可以降低高炉冲渣水余热的利用难度。(The invention discloses a fluidized small ball heat storage blast furnace slag flushing water waste heat power generation system, which comprises: the blast furnace slag flushing unit comprises a slag flushing cold water pool, a slag flushing device and a slag flushing hot water pool which are sequentially connected; the heat storage and exchange unit comprises a fluidized small ball heat reservoir, a heat exchanger, an evaporator and a superheater; the organic working medium expansion power generation unit comprises an expander and a generator; the organic working medium cooling and compressing unit comprises a heat regenerator, a condenser and a compression pump. From this, through the power generation system of this application, can utilize the organic working medium of waste heat heating of blast furnace slag flushing water to generate electricity to can avoid the waste of waste heat resource, can realize the high-efficient utilization of waste heat resource, also can prevent the polluted environment, simultaneously, need not change the shrend technology of blast furnace slag flushing, thereby can not influence the final activity of slag, can reduce the utilization degree of difficulty of blast furnace slag flushing water waste heat.)

1. The utility model provides a blast furnace slag flushing water waste heat power generation system of fluidization pellet heat-retaining which characterized in that includes:

the blast furnace slag flushing unit comprises a slag flushing cold water pool, a slag flushing device and a slag flushing hot water pool which are sequentially connected;

heat-retaining and heat transfer unit, heat-retaining and heat transfer unit include fluidization bobble heat reservoir, heat exchanger, evaporimeter, over heater, towards sediment hot water pool export with fluidization bobble heat reservoir with the water inlet of over heater links to each other, fluidization bobble heat reservoir with the water outlet of over heater join the back with evaporimeter water inlet links to each other, evaporimeter water outlet links to each other with towards sediment cold water pool, fluidization bobble heat reservoir water outlet still with the water inlet of heat exchanger links to each other, heat exchanger water outlet still with fluidization bobble heat reservoir water inlet links to each other. A working medium outlet of the heat exchanger is connected with the working medium inlet of the evaporator, and the working medium outlet of the evaporator is connected with the working medium inlet of the superheater;

the organic working medium expansion power generation unit comprises an expander and a generator, and the superheater working medium outlet is connected with the expander working medium inlet;

the organic working medium cooling and compressing unit comprises a heat regenerator, a condenser and a compression pump, wherein a working medium outlet of an expansion machine is connected to an inlet of a high-temperature side of the heat regenerator, an outlet of the high-temperature side of the heat regenerator is connected to an inlet of the condenser, an outlet of the condenser is connected with an inlet of the compression pump, an outlet of the compression pump is connected to an inlet of a low-temperature side of the heat regenerator and is also connected with a working medium inlet of the heat exchanger, and an outlet of the low-temperature side of the heat regenerator is connected to a working medium inlet of the heat exchanger.

2. The fluidized bead heat-stored blast furnace slag flushing water waste heat power generation system according to claim 1, wherein the fluidized bead heat-stored blast furnace slag flushing water waste heat power generation system has a blast furnace slag flushing operation mode and a slag flushing intermittent operation mode:

in the blast furnace slag flushing operation mode, organic working media are compressed in the compression pump, then sequentially pass through the low-temperature side of the heat regenerator, the evaporator and the superheater, then enter the expansion machine to do work, and sequentially enter the high-temperature side of the heat regenerator and the condenser after doing work, and then return to the compression pump; hot water in the slag flushing hot water pool is respectively fed into the fluidized small ball heat reservoir and the superheater, and hot water flowing out of the fluidized small ball heat reservoir and the superheater enters the evaporator and then flows back to the slag flushing cold water pool;

in the slag flushing intermittent operation mode, organic working media are compressed in the compression pump, then enter the heat exchanger and then enter the expansion machine to do work, the organic working media after doing work enter the condenser and then return to the compression pump, and hot water circulates between the fluidized small ball heat reservoir and the heat exchanger, so that the organic working media in the heat exchanger are heated.

3. The fluidized-pellet heat-stored blast furnace slag water waste heat power generation system as claimed in claim 1, wherein the fluidized-pellet heat reservoir comprises: the heat storage device comprises a tank body and a heat storage small ball arranged in the tank body.

4. The fluidized pellet heat-stored blast furnace slag flushing water waste heat power generation system as claimed in claim 3, wherein a water inlet is arranged at the bottom of the tank body, and a water outlet is arranged at the top of the tank body.

5. The fluidized small ball heat-storage blast furnace slag flushing water waste heat power generation system as claimed in claim 4, wherein an upper isolation part and a lower isolation part are further arranged in the tank body, the upper isolation part is located below a water outlet of the tank body, the lower isolation part is located above a water inlet of the tank body, the heat storage small balls are arranged between the upper isolation part and the lower isolation part, and each of the upper isolation part and the lower isolation part is provided with a water passing hole smaller than the heat storage small balls.

6. The fluidized pellet heat stored blast furnace slag washing water waste heat power generation system of claim 4, wherein the filling height of the heat storage pellets is 1/3 to 2/3 of the height between the upper partition and the lower partition.

7. The fluidized pellet heat-stored blast furnace slag water waste heat power generation system of claim 3, wherein the heat-storage pellet has a closed spherical shell and a heat-storage material disposed within the spherical shell.

8. The fluidized pellet heat-stored blast furnace slag flushing water waste heat power generation system of claim 7, wherein the heat storage material is a low temperature phase change material.

9. The fluidized pellet heat stored blast furnace slag washing water waste heat power generation system of claim 5, wherein each of the upper partition and the lower partition is configured as an insulating plate or an insulating wire mesh.

10. The fluidized small ball heat-storage blast furnace slag flushing water waste heat power generation system as claimed in claim 1, wherein flow-adjustable flow valves are respectively arranged at water inlets of the fluidized small ball heat storage device and the superheater.

Technical Field

The invention relates to the field of power generation, in particular to a fluidized small ball heat storage blast furnace slag flushing water waste heat power generation system.

Background

Iron and steel enterprises are energy-consuming households in China, the total energy consumption of the iron and steel enterprises accounts for about 15% of the total national energy consumption, the energy consumption of an iron-making process accounts for 64% of the energy consumption of the whole industry, and the iron and steel enterprises are key process links for energy conservation and consumption reduction. The method develops, utilizes and submerges precious waste heat resources, realizes high-efficiency utilization, and is one of the important measures for the national implementation of energy-saving economic industry. The 1450-1550 ℃ high-temperature slag can be generated in the iron and steel industry in the iron making process, and water can be selected to cool the high-temperature slag, so that a large amount of hot blast furnace slag washing water is generated, the temperature of the hot blast furnace slag washing water is 86-90 ℃, and the utilization difficulty of the hot blast furnace slag washing water is high at present.

In the related art, the blast furnace slag flushing water which is a discontinuous heat source is partially used for heating in winter, most of the heat is released to the atmosphere through the cooling tower, and the treatment mode not only wastes a large amount of waste heat resources, but also causes environmental pollution. Meanwhile, if the heat conducting oil is used for directly absorbing the heat of the high-temperature slag, the temperature of the high-temperature slag is reduced, so that the water quenching process of the high-temperature slag is changed, and the application of the water quenching process in practical engineering is difficult.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide a fluidized small-ball heat storage blast furnace slag flushing water waste heat power generation system, through the power generation system, waste heat of blast furnace slag flushing water can be used for heating an organic working medium to generate power, waste heat resources can be avoided, high-efficiency utilization of the waste heat resources can be realized, environmental pollution can be prevented, and meanwhile, a water quenching process of blast furnace slag flushing is not required to be changed, so that final activity of furnace slag is not influenced, and difficulty in utilization of the waste heat of the blast furnace slag flushing water can be reduced.

The blast furnace slag flushing water waste heat power generation system with the heat stored by the fluidized small balls comprises: the blast furnace slag flushing unit comprises a slag flushing cold water pool, a slag flushing device and a slag flushing hot water pool which are sequentially connected; heat-retaining and heat transfer unit, heat-retaining and heat transfer unit include fluidization bobble heat reservoir, heat exchanger, evaporimeter, over heater, towards sediment hot water pool export with fluidization bobble heat reservoir with the water inlet of over heater links to each other, fluidization bobble heat reservoir with the water outlet of over heater join the back with evaporimeter water inlet links to each other, evaporimeter water outlet links to each other with towards sediment cold water pool, fluidization bobble heat reservoir water outlet still with the water inlet of heat exchanger links to each other, heat exchanger water outlet still with fluidization bobble heat reservoir water inlet links to each other. A working medium outlet of the heat exchanger is connected with the working medium inlet of the evaporator, and the working medium outlet of the evaporator is connected with the working medium inlet of the superheater; the organic working medium expansion power generation unit comprises an expander and a generator, and the superheater working medium outlet is connected with the expander working medium inlet; the organic working medium cooling and compressing unit comprises a heat regenerator, a condenser and a compression pump, wherein a working medium outlet of an expansion machine is connected to an inlet of a high-temperature side of the heat regenerator, an outlet of the high-temperature side of the heat regenerator is connected to an inlet of the condenser, an outlet of the condenser is connected with an inlet of the compression pump, an outlet of the compression pump is connected to an inlet of a low-temperature side of the heat regenerator and is also connected with a working medium inlet of the heat exchanger, and an outlet of the low-temperature side of the heat regenerator is connected to a working medium inlet of the heat exchanger.

According to the blast furnace slag flushing water waste heat power generation system with the fluidized small balls for heat storage, disclosed by the invention, the waste heat of the blast furnace slag flushing water can be used for heating the organic working medium to generate power, so that the waste of waste heat resources can be avoided, the high-efficiency utilization of the waste heat resources can be realized, the environment pollution can be prevented, meanwhile, the water quenching process of the blast furnace slag flushing is not required to be changed, the final activity of the slag is not influenced, and the difficulty in utilizing the waste heat of the blast furnace slag flushing water can be reduced.

In some examples of the invention, the fluidized small ball heat storage blast furnace slag water waste heat power generation system has a blast furnace slag flushing operation mode and a slag flushing intermittent operation mode: in the blast furnace slag flushing operation mode, organic working media are compressed in the compression pump, then sequentially pass through the low-temperature side of the heat regenerator, the evaporator and the superheater, then enter the expansion machine to do work, and sequentially enter the high-temperature side of the heat regenerator and the condenser after doing work, and then return to the compression pump; hot water in the slag flushing hot water pool is respectively fed into the fluidized small ball heat reservoir and the superheater, and hot water flowing out of the fluidized small ball heat reservoir and the superheater enters the evaporator and then flows back to the slag flushing cold water pool; in the slag flushing intermittent operation mode, organic working media are compressed in the compression pump, then enter the heat exchanger and then enter the expansion machine to do work, the organic working media after doing work enter the condenser and then return to the compression pump, and hot water circulates between the fluidized small ball heat reservoir and the heat exchanger, so that the organic working media in the heat exchanger are heated.

In some examples of the invention, the fluidized pellet heat reservoir comprises: the heat storage device comprises a tank body and a heat storage small ball arranged in the tank body.

In some examples of the invention, the tank body is provided with a water inlet at the bottom and a water outlet at the top.

In some examples of the invention, an upper isolation part and a lower isolation part are further arranged in the tank body, the upper isolation part is positioned below the water outlet of the tank body, the lower isolation part is positioned above the water inlet of the tank body, the heat storage ball is arranged between the upper isolation part and the lower isolation part, and each of the upper isolation part and the lower isolation part is provided with a water through hole smaller than the heat storage ball.

In some examples of the invention, the fill height of the heat storage pellets is from 1/3 to 2/3 of the height between the upper and lower partitions.

In some examples of the invention, the heat storage pellet has a closed spherical shell and a heat storage material disposed within the spherical shell.

In some examples of the invention, the heat storage material is a low temperature phase change material.

In some examples of the present invention, each of the upper and lower isolation portions is configured as an isolation plate or an isolation screen.

In some examples of the invention, the water inlets of the fluidized pellet heat reservoir and the superheater are respectively provided with flow valves with adjustable flow rates.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a process flow diagram of a power generation system according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a fluidized pellet heat reservoir according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a heat storage pellet according to an embodiment of the invention.

Reference numerals:

a power generation system 100;

a blast furnace slag flushing unit 1; a slag flushing cold water tank 11; a slag flushing device 12; a slag flushing hot water tank 13; a slag flushing water pump 14;

a heat storage and exchange unit 2; an evaporator 22; a superheater 23; a fluidized bead heat reservoir 28; a heat exchanger 29; an internal circulation pump 210;

an organic working medium expansion power generation unit 3; an expander 31; a generator 32;

an organic working medium cooling and compressing unit 4; a heat regenerator 41; a condenser 42; a compression pump 43;

a first valve 15, a second valve 16, a third valve 24, a fourth valve 25, a fifth valve 26, a sixth valve 27, a seventh valve 44, an eighth valve 45, a ninth valve 46; a tenth valve 47;

a tank 50; a heat storage pellet 51; a water inlet 52; a water outlet 53; an upper partition portion 54; a lower partition portion 55; a spherical shell 56; a heat storage material 57.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A fluidized-pellet heat storage blast furnace slag water waste heat power generation system 100 (hereinafter simply referred to as a power generation system 100) according to an embodiment of the present invention will be described below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, a power generation system 100 according to an embodiment of the present invention includes: the device comprises a blast furnace slag flushing unit 1, a heat storage and exchange unit 2, an organic working medium expansion power generation unit 3 and an organic working medium cooling and compression unit 4. The blast furnace slag flushing unit 1 comprises a slag flushing cold water tank 11, a slag flushing device 12 and a slag flushing hot water tank 13 which are sequentially connected, wherein the slag flushing cold water tank 11, the slag flushing device 12 and the slag flushing hot water tank 13 can jointly form the blast furnace slag flushing unit 1, an inlet of the slag flushing device 12 can be connected with an outlet of the slag flushing cold water tank 11, and an outlet of the slag flushing device 12 can be connected with an inlet of the slag flushing hot water tank 13.

The heat storage and exchange unit 2 comprises a fluidized small ball heat reservoir 28, a heat exchanger 29, an evaporator 22 and a superheater 23, an outlet of the slag flushing hot water tank 13 is connected with water inlets of the fluidized small ball heat reservoir 28 and the superheater 23, water outlets of the fluidized small ball heat reservoir 28 and the superheater 23 are converged and then connected with a water inlet of the evaporator 22, a water outlet of the evaporator 22 is connected with the slag flushing cold water tank 11, a water outlet of the fluidized small ball heat reservoir 28 is also connected with a water inlet of the heat exchanger 29, and a water outlet of the heat exchanger 29 is also connected with a water inlet of the fluidized small ball heat reservoir 28. The working medium outlet of the heat exchanger 29 is connected with the working medium inlet of the evaporator 22, and the working medium outlet of the evaporator 22 is connected with the working medium inlet of the superheater 23.

It should be explained that the fluidized small ball heat reservoir 28, the heat exchanger 29, the evaporator 22 and the superheater 23 may jointly form the heat storage and exchange unit 2, the heat exchanger 29, the evaporator 22 and the superheater 23 may all have a water inlet, a water outlet, a working medium outlet and a working medium inlet, the fluidized small ball heat reservoir 28 may have a water inlet and a water outlet, specifically, the water inlets of the fluidized small ball heat reservoir 28 and the superheater 23 may be connected to an outlet of the hot slag flushing water tank 13, the water outlets of the fluidized small ball heat reservoir 28 and the superheater 23 may be jointly connected to the water inlet of the evaporator 22, an outlet of the cold slag flushing water tank 11 may be connected to an inlet of the slag flushing device 12, an inlet of the cold slag flushing water tank 11 may be connected to the water outlet of the evaporator 22, a water inlet of the heat exchanger 29 may be connected to the water outlet of the fluidized small ball heat reservoir 28, a water outlet of the heat exchanger 29 may also be connected to the water inlet of the fluidized, the working medium inlet of the evaporator 22 can be connected with the working medium outlet of the heat exchanger 29, and the working medium outlet of the evaporator 22 can be connected with the working medium inlet of the superheater 23.

The organic working medium expansion power generation unit 3 comprises an expander 31 and a generator 32, a working medium outlet of the superheater 23 is connected with a working medium inlet of the expander 31, the expander 31 is connected with the generator 32 through a transmission shaft, it should be noted that the expander 31 and the generator 32 can jointly form the organic working medium expansion power generation unit 3, the expander 31 can be provided with a working medium outlet and a working medium inlet, and the working medium outlet of the superheater 23 can be connected with the working medium inlet of the expander 31.

The organic working medium cooling and compressing unit 4 comprises a heat regenerator 41, a condenser 42 and a compression pump 43, wherein a working medium outlet of the expander 31 is connected to an inlet of a high-temperature side of the heat regenerator 41, an outlet of the high-temperature side of the heat regenerator 41 is connected to an inlet of the condenser 42, an outlet of the condenser 42 is connected to an inlet of the compression pump 43, an outlet of the compression pump 43 is connected to an inlet of a low-temperature side of the heat regenerator 41, and an outlet of the low-temperature side of the heat regenerator 41 is connected to a working medium inlet of the heat exchanger 29 and a working medium inlet.

It should be explained that the heat regenerator 41, the condenser 42 and the compression pump 43 may together form the organic working medium cooling and compression unit 4, the heat regenerator 41 may have a high temperature side and a low temperature side, in the left-right direction shown in fig. 1, the left side of the heat regenerator 41 is a low temperature side, the right side of the heat regenerator 41 is a high temperature side, the high temperature side and the low temperature side of the heat regenerator 41 are both provided with an outlet and an inlet, the condenser 42 and the compression pump 43 are both provided with an outlet and an inlet, the working medium outlet of the expander 31 can be connected with the inlet of the high temperature side of the heat regenerator 41, the outlet of the high temperature side of the heat regenerator 41 can be connected with the inlet of the condenser 42, the inlet of the compression pump 43 can be connected with the outlet of the condenser 42, the outlet of the compression pump 43 can be connected with the inlet of the low temperature side of the heat regenerator 41, the outlet of the low temperature side of the heat regenerator 41 can be connected with the working medium inlet of the heat exchanger 29, and the.

The power generation system 100 may further include a first valve 15, a second valve 16, a third valve 24, a fourth valve 25, a fifth valve 26, a sixth valve 27, a seventh valve 44, an eighth valve 45, a ninth valve 46, and a tenth valve 47, where it should be noted that the first valve 15 may be disposed at a water inlet of the fluidized bead heat reservoir 28, the second valve 16 may be disposed at a water inlet of the superheater 23, and a flow direction of the blast furnace slag flushing water may be limited by opening and closing the first valve 15 and the second valve 16.

The third valve 24 may be disposed at the working medium inlet of the evaporator 22, the fourth valve 25 may be disposed between the working medium inlet of the evaporator 22 and the working medium outlet of the superheater 23, the fourth valve 25 may be disposed between the working medium inlet of the evaporator 22 and the working medium inlet of the expander 31, the fifth valve 26 may be disposed between the working medium inlet and the working medium outlet of the heat exchanger 29, the sixth valve 27 may be disposed at the working medium inlet of the heat exchanger 29, the seventh valve 44 may be disposed at the inlet of the high temperature side of the regenerator 41, the eighth valve 45 may be disposed between the inlet and the outlet of the high temperature side of the regenerator 41, the ninth valve 46 may be disposed at the inlet of the low temperature side of the regenerator 41, the tenth valve 47 may be disposed between the inlet and the outlet of the low temperature side of the regenerator 41, and the third valve 24, the fourth valve 25, the fifth valve 26, the sixth valve 27, the seventh valve 44, the fifth valve 47, The opening and closing of the eighth valve 45, the ninth valve 46 and the tenth valve 47 may restrict the flow direction of the working fluid.

It should be noted that the power generation system 100 may include a blast furnace slag flushing water circulation channel and an organic working medium circulation channel, the blast furnace slag flushing water circulation channel may be composed of the heat storage and heat exchange unit 2 and the blast furnace slag flushing unit 1, specifically, the slag flushing hot water generated by the slag flushing device 12 may enter the slag flushing hot water tank 13, then the slag flushing hot water may be delivered to the heat storage and heat exchange unit 2 through the slag flushing water pump 14, and finally the slag flushing hot water may flow into the slag flushing cold water tank 11 from the heat storage and heat exchange unit 2 to continue to be used for slag flushing.

The working medium circulation channel can be composed of an organic working medium cooling and compressing unit 4, an expansion machine 31 and a heat storage and exchange unit 2, specifically, the organic working medium can enter a low-temperature side of a heat regenerator 41 to absorb the exhaust steam heat of the expansion machine 31 after being compressed in a compression pump 43, the organic working medium can enter the heat storage and exchange unit 2 to absorb the waste heat of blast furnace slag flushing water after absorbing the exhaust steam heat at the low-temperature side of the heat regenerator 41, then superheated organic working medium steam can enter the expansion machine 31 to do work and output power to a generator 32 to generate electric power, after the expansion machine 31 does work, the organic working medium can enter a high-temperature side of the heat regenerator 41 to emit a part of heat, finally the organic working medium can enter a condenser 42, the condenser 42 can condense the organic working medium into a liquid state, and the organic working medium can enter the compression pump 43 to be compressed and used.

From this, through the power generation system 100 of this application, can utilize the organic working medium of waste heat heating of blast furnace slag flushing water to generate electricity to can avoid the waste of waste heat resource, can realize the high-efficient utilization of waste heat resource, also can prevent the polluted environment, simultaneously, need not change the shrend technology of blast furnace slag flushing, thereby can not influence the final activity of slag, can reduce the utilization degree of difficulty of blast furnace slag flushing water waste heat.

In some embodiments of the present invention, the fluidized pellet heat stored blast furnace slag water waste heat power generation system 100 may have a blast furnace slag flushing operation mode and a slag flushing intermittent operation mode: in the blast furnace slag flushing operation mode, the organic working medium is compressed in the compression pump 43, then sequentially passes through the low-temperature side of the heat regenerator 41, the evaporator 22 and the superheater 23, then enters the expansion machine 31 to do work, and the organic working medium after doing work sequentially enters the high-temperature side of the heat regenerator 41 and the condenser 42 and then returns to the compression pump 43. And the hot water in the slag flushing hot water tank 13 is respectively sent to the fluidized small ball heat reservoir 28 and the superheater 23 through the slag flushing water pump 14, the hot water flowing out of the fluidized small ball heat reservoir 28 and the superheater 23 enters the evaporator 22 and then flows back to the slag flushing cold water tank 11, and further, the hot water flowing out of the fluidized small ball heat reservoir 28 and the superheater 23 is collected and then enters the evaporator 22 and then flows back to the slag flushing cold water tank 11.

It should be noted that the compression pump 43 can compress the organic working medium, when the blast furnace slag flushing operation mode is performed, because the ninth valve 46 is in an open state and the tenth valve 47 is in a closed state at this time, the organic working medium can enter the regenerator 41 through the inlet at the low temperature side of the regenerator 41 after being compressed in the compression pump 43, the organic working medium can be heated by the exhaust steam from the expander 31 in the regenerator 41, because the sixth valve 27 and the fourth valve 25 are in a closed state at this time and the third valve 24 and the fifth valve 26 are in an open state, the organic working medium can enter the evaporator 22 through the outlet at the low temperature side of the regenerator 41 and the working medium inlet of the evaporator 22 after being heated, so as to absorb the heat of the blast furnace slag flushing water, and then the organic working medium can enter the superheater 23 through the working medium outlet of the evaporator 22 and the working medium inlet of the superheater 23 to be further heated to an overheated state by the blast furnace slag, at this time, because the fourth valve 25 is in a closed state, the overheated organic working medium can enter the expander 31 through the working medium outlet of the superheater 23 and the working medium inlet of the expander 31 to do work, the expander 31 can output power to the generator 32 to generate electric power, at this time, because the eighth valve 45 is in a closed state and the seventh valve 44 is in an open state, the organic working medium after doing work can enter the regenerator 41 through the working medium outlet of the expander 31 and the inlet of the high-temperature side of the regenerator 41 to release a part of heat, then the organic working medium can enter the condenser 42 through the outlet of the high-temperature side of the regenerator 41 and the inlet of the condenser 42, and the organic working medium can enter the compression pump 43 through the outlet of the condenser 42 and the inlet of the compression pump 43 after being fully condensed by the condenser 42 to.

And the blast furnace slag flushing water can be heated by the high-temperature slag in the slag flushing device 12, the heated blast furnace slag flushing hot water can enter the slag flushing hot water tank 13, at the moment, because the first valve 15 and the second valve 16 are both in an open state, the blast furnace slag flushing hot water can enter the fluidized small ball heat reservoir 28 and the superheater 23 from the slag flushing hot water tank 13 through the slag flushing water pump 14 respectively through the water inlets of the fluidized small ball heat reservoir 28 and the superheater 23, the blast furnace slag flushing hot water entering the fluidized small ball heat reservoir 28 can store part of heat in the fluidized small ball heat reservoir 28, the blast furnace slag flushing hot water entering the superheater 23 can heat the organic working medium in the superheater 23, and then the blast furnace slag flushing hot water entering the fluidized small ball heat reservoir 28 can enter the evaporator 22 through the water outlet of the fluidized small ball heat reservoir 28 and the water inlet of the evaporator 22 to heat the organic working medium in the evaporator 22, the blast furnace slag flushing hot water entering the superheater 23 can enter the evaporator 22 through a water outlet of the superheater 23 and a water inlet of the evaporator 22 to heat the organic working medium in the evaporator 22, and the blast furnace slag flushing water after sufficient heat release can enter the slag flushing cold water tank 11 through a water outlet of the evaporator 22 to be continuously used for slag flushing.

In the slag flushing intermittent operation mode, the organic working medium is compressed in the compression pump 43, enters the heat exchanger 29 and then enters the expansion machine 31 to do work, the organic working medium after doing work enters the condenser 42 and then returns to the compression pump 43, and hot water circulates between the fluidized small ball heat reservoir 28 and the heat exchanger 29, so that the organic working medium in the heat exchanger 29 is heated.

It should be noted that, the heat storage and heat exchange unit 2 may further include an internal circulation pump 210, when in the slag flushing intermittent operation mode, after the organic working medium is compressed in the compression pump 43, because the ninth valve 46 and the fifth valve 26 are in the closed state at this time, and the tenth valve 47 and the sixth valve 27 are in the open state, the organic working medium may enter the heat exchanger 29 through the outlet of the compression pump 43 and the working medium inlet of the heat exchanger 29, the organic working medium may absorb the heat stored in the heat exchanger 29 in the blast furnace slag flushing operation mode in the heat exchanger 29, because the third valve 24 is in the closed state at this time, and the fourth valve 25 is in the open state, the organic working medium may enter the expander 31 through the working medium outlet of the heat exchanger 29 and the working medium inlet of the expander 31 to do work, the expander 31 may output the power to the generator 32 to generate the electric power, because the eighth valve 45 is in the open state, the seventh valve 44 is in a closed state, the organic working medium after applying work can enter the condenser 42 through the working medium outlet of the expansion machine 31 and the inlet of the condenser 42, the organic working medium can enter the compression pump 43 through the outlet of the condenser 42 and the inlet of the compression pump 43 after being fully condensed in the condenser 42 for recycling, at this time, the internal circulation pump 210 is in an open state, the internal circulation pump 210 can drive hot water to circularly flow between the fluidized small ball heat reservoir 28 and the heat exchanger 29, the hot water can absorb heat stored in the fluidized small ball heat reservoir 28 and heat the organic working medium in the heat exchanger 29, and at this time, the first valve 15 and the second valve 16 are both in a closed state. The continuous operation of the power generation system 100 can be ensured, the expansion machine 31 can be prevented from being damaged due to the intermittent operation of the expansion machine 31, waste of waste heat resources can be avoided, the waste heat resources can be efficiently utilized, and the environment pollution can be prevented.

In some embodiments of the present invention, as shown in fig. 2, the fluidized bead heat reservoir 28 may include: the fluidized small ball heat reservoir 28 can be formed by the heat storage small ball 51 and the tank body 50 together, the heat storage small ball 51 can be arranged in the tank body 50, when the blast furnace slag flushing operation mode is performed, in the vertical direction shown in fig. 2, the slag flushing hot water tank 13 can convey blast furnace slag flushing water to flow into the tank body 50 from the lower part of the tank body 50 of the fluidized small ball heat reservoir 28, when the blast furnace slag flushing water flows to the upper part of the tank body 50 from the lower part of the tank body 50, the blast furnace slag flushing water can carry the heat storage small ball 51 to flow and turn in the tank body 50, the blast furnace slag flushing water can store waste heat in the heat storage small ball 51, and the blast furnace slag flushing water after heat release can leave the tank body 50 from the upper part of the tank body 50 to complete the heat storage process of the blast furnace slag flushing operation mode. In the slag flushing intermittent operation mode, in the up-down direction shown in fig. 2, the internal circulation pump 210 can drive hot water in the heat exchanger 29 to flow into the tank 50 from the lower part of the tank 50 of the fluidized small ball heat reservoir 28, when the hot water flows from the lower part of the tank 50 to the upper part of the tank 50, the hot water can carry the heat storage small balls 51 to flow and turn over in the tank 50, the hot water can absorb heat stored in the heat storage small balls 51, the hot water after heat absorption can leave the tank 50 from the upper part of the tank 50, and the hot water after heat absorption can enter the heat exchanger 29 to exchange heat with organic working media in the heat exchanger 29 after leaving the tank 50. So set up and to realize blast furnace slag flushing water thermal quick storage and release, can avoid power generation system 100 to frequently open and stop to make power generation system 100 can the continuous operation work, and then can promote power generation system 100's job stabilization nature and security, and, can avoid waste heat resource's waste, can realize waste heat resource's high-efficient utilization, simultaneously, also can prevent the polluted environment.

In some embodiments of the present invention, as shown in fig. 2, the bottom of the tank 50 may be provided with a water inlet 52, and the top of the tank 50 may be provided with a water outlet 53, it should be noted that the hot slag flushing water tank 13 may convey blast furnace slag flushing water from the water inlet 52 at the bottom of the tank 50 into the tank 50, after the blast furnace slag flushing water stores the waste heat in the heat storage pellets 51 in the tank 50, the blast furnace slag flushing water can leave the tank 50 through the water outlet 53 of the tank 50, the internal circulation pump 210 can drive the hot water in the heat exchanger 29 to enter the tank 50 from the water inlet 52 at the bottom of the tank 50, after the hot water absorbs the heat stored in the heat storage balls 51 in the tank 50, the hot water can leave the tank 50 through the water outlet 53 of the tank 50, the arrangement can ensure that slag flushing water and hot water of the blast furnace can smoothly enter and leave the tank body 50, thereby ensuring the working reliability of the fluidized small ball heat reservoir 28.

In some embodiments of the present invention, as shown in fig. 2, an upper partition 54 and a lower partition 55 may be further disposed in the tank 50, the upper partition 54 may be located below the water outlet 53 of the tank 50, the lower partition 55 may be located above the water inlet 52 of the tank 50, the heat storage beads 51 may be disposed between the upper partition 54 and the lower partition 55, and each of the upper partition 54 and the lower partition 55 may be provided with a water through hole smaller than the heat storage beads 51. It should be noted that, in the up-down direction shown in fig. 2, the upper isolation part 54 may be located below the water outlet 53, the lower isolation part 55 may be located above the water inlet 52, the heat storage small ball 51 may be disposed between the upper isolation part 54 and the lower isolation part 55, and both the upper isolation part 54 and the lower isolation part 55 may be provided with water through holes, the diameter of the water through holes is smaller than that of the heat storage small ball 51, so that the blast furnace slag flushing water and the hot water can enter and leave the tank 50 through the water through holes disposed in the upper isolation part 54 and the lower isolation part 55, and the heat storage small ball 51 can be prevented from flowing out of the tank 50.

In some embodiments of the present invention, the fill height of heat storage pellets 51 may be 1/3 through 2/3 of the height between upper partition 54 and lower partition 55. It should be noted that if the height of the heat storage ball 51 is too small, the heat storage capacity of the fluidized ball heat reservoir 28 will be low, if the height of the small heat storage ball 51 is too high, the small heat storage ball 51 cannot move in the tank 50, the small heat storage ball 51 cannot be in full contact with blast furnace slag flushing water or hot water, the heat storage capacity of the fluidized small ball heat storage 28 is low, therefore, by setting the filling height of the heat storage beads 51 to 1/3 to 2/3, which is the height between the upper partition 54 and the lower partition 55, sufficient heat storage beads 51 can be provided in the tank 50, the heat storage and release capacity of the fluidized bead heat reservoir 28 can be ensured, in addition, the heat storage small ball 51 can move in the tank body 50, and the heat storage small ball 51 can be ensured to be fully contacted with blast furnace slag flushing water or hot water, so that the heat exchange efficiency of the heat storage small ball 51 can be ensured.

In some embodiments of the present invention, as shown in fig. 3, the heat storage ball 51 may have a closed ball shell 56 and a heat storage material 57 disposed in the ball shell 56, the heat storage material 57 may be a phase change heat storage material, and the phase change heat storage material may be made of a ternary mixed nitrate low-temperature phase change material, or a mixture of calcium nitrate, sodium nitrate and potassium nitrate, for example: calcium nitrate: sodium nitrate: potassium nitrate is 32:24:44, and can also be made of a mixture of barium hydroxide octahydrate, calcium fluoride and gelatin, and the phase-change heat storage material can absorb or release a large amount of heat energy in the process of converting one phase into the other phase, so that the phase-change heat storage material can be used as an excellent heat storage material in the spherical shell 56. It should be noted that the material of the spherical shell 56 may be made of corrosion-proof metal or plastic, so as to ensure good sealing performance and thermal conductivity of the spherical shell 56 and prevent the spherical shell 56 from being corroded. The heat storage material 57 may be disposed in the closed spherical shell 56, and the diameter of the closed spherical shell 56 may be configured to be 2-7mm, and preferably, the diameter of the closed spherical shell 56 may be configured to be 5mm, so that the contact area of the heat storage pellets 51 with the blast furnace slag flushing water or hot water can be increased, and the heat exchange efficiency between the heat storage pellets 51 and the blast furnace slag flushing water or hot water can be improved. Also, since the heat storage material 57 has a phase change property, the heat storage material 57 can be confined within the spherical shell 56, and the spherical shell 56 can transfer heat between the heat storage material 57 and the blast furnace slag water.

It should be noted that, by arranging the heat storage material 57 in the spherical shell 56, the heat of the blast furnace slag flushing water can be effectively absorbed. Take the example that the temperature of the slag flushing hot water is 90 ℃ and the phase transition temperature of the low-temperature heat storage material 57 is 80 ℃. In the blast furnace slag flushing operation mode, after blast furnace slag flushing hot water flows in from the water inlet 52 of the tank body 50, the blast furnace slag flushing hot water flows upwards to drive the heat storage small balls 51 to roll between the upper isolation part 54 and the lower isolation part 55, heat in the blast furnace slag flushing hot water is conducted to the heat storage material 57 inside through the spherical shell 56, the heat storage material 57 absorbs the heat and then undergoes phase change, and the heat is stored in the heat storage material 57 in a latent heat mode.

In some embodiments of the present invention, the heat storage material 57 may be a low-temperature phase change material, and it should be noted that the low-temperature phase change material can effectively absorb heat of the blast furnace slag flushing water. The temperature of the blast furnace slag flushing water is 90 ℃, and the phase change temperature of the low-temperature phase change material is 80 ℃. In the blast furnace slag flushing operation mode, blast furnace slag flushing water flows in from a water inlet 52 of a tank body 50 of the fluidized small ball heat reservoir 28, flows through a water hole through a lower isolation part 55 and is equalized, the blast furnace slag flushing water can flow upwards to carry the heat storage small balls 51 to be fluidized and turned between the upper isolation part 54 and the lower isolation part 55, heat in the blast furnace slag flushing water can be conducted to a low-temperature phase change material inside the spherical shell 56 through the spherical shell 56 of the heat storage small balls 51, the low-temperature phase change material can change phase after absorbing the heat, and the heat is stored in the low-temperature phase change material in a latent heat mode. Because the temperature of the phase change point of the low-temperature phase change material is 80 ℃, after the blast furnace slag flushing water fully exchanges heat with the heat storage pellets 51 in the fluidized pellet heat reservoir 28, the temperature of the blast furnace slag flushing water is still higher than 80 ℃, and therefore, an evaporator 22 must be connected behind the fluidized pellet heat reservoir 28, so that the heat of the blast furnace slag flushing water can be further absorbed, the temperature of the blast furnace slag flushing water is reduced to below 50 ℃, the residual energy utilization efficiency is improved, and meanwhile, the temperature of the blast furnace slag flushing water is not higher than 50 ℃, so that the technological requirement of continuous slag flushing can be met.

As some embodiments of the present invention, the phase transition temperature of the heat storage material 57 is T, and satisfies the relationship: t is more than or equal to 75 ℃ and less than or equal to 85 ℃, and preferably, the heat storage material 57 can be set as the heat storage material 57 with the phase change temperature of 80 ℃. Because the blast furnace slag flushing water is high-temperature hot water at 86-90 ℃, the heat storage material 57 absorbs the most heat at the phase change temperature and is most suitable for being used as the heat storage material, the arrangement can ensure that the heat storage material 57 can generate phase change, and the heat storage small balls 51 have the heat storage and release functions, thereby ensuring the working reliability of the heat storage small balls 51.

It should be noted that the latent heat of phase change of the low-temperature phase change material can reach 100-200kJ/kg, but the defect is that the heat conductivity coefficient is very low, and is usually less than 3W/(m.K)^-1Therefore, in order to ensure the heat storage and heat exchange effects, the low-temperature phase-change material is often required to be filled in a small space, which leads to the reduction of the overall heat storage capacity.

In this application, through filling low temperature phase change material to in the confined spherical shell 56 to heat-retaining bobble 51 diameter only has 5mm, at fluidization bobble heat reservoir 28 heat-retaining with exothermic in-process, heat-retaining bobble 51 is all washed away by the fluid of heat transfer all around, great improvement the efficiency of heat transfer. Meanwhile, as the blast furnace slag flushing water and the hot water flow upwards to carry the small heat storage balls 51 to perform fluidization operation, the small heat storage balls 51 are continuously exchanged up and down and turned over back and forth between the upper isolation part 54 and the lower isolation part 55, the heat storage and heat release rates of all the small heat storage balls 51 in the whole fluidization small ball heat reservoir 28 are basically consistent, the heat storage process is faster, and the heat release process is more stable. Through laboratory research and simulation calculation, the running mode of heat storage of the fluidized small ball heat reservoir 28 is adopted, compared with the running mode of heat storage of the heat storage small ball 51 with the diameter of 10mm, the heat storage capacity is increased by 50%, the heat exchange effect is enhanced by 25%, the heat release temperature stabilization time is prolonged by about 30%, and the heat storage and heat exchange performance of the fluidized small ball heat reservoir 28 is greatly improved.

In some embodiments of the present invention, each of the upper and lower partitions 54 and 55 may be configured as a partition plate or a partition wire net, it should be explained that the upper and lower partitions 54 and 55 may be configured as a partition plate, the upper and lower partitions 54 and 55 may also be configured as a partition wire net, and the maximum mesh of the partition wire net may be set to be smaller than the cross-sectional area of the heat storage pellets 51, which may facilitate the manufacturing of the upper and lower partitions 54 and 55, so that the production efficiency of the fluidized pellet heat reservoir 28 may be improved, and the heat storage pellets 51 may be prevented from flowing out of the tank 50 through the mesh of the partition wire net.

As some embodiments of the present invention, in the up-down direction shown in fig. 2, the cross-sectional area of the water inlet 52 gradually increases from below to above, and the cross-sectional area of the water outlet 53 gradually increases from above to below. When the slag flushing hot water (liquid) flows into the water inlet 52, the flow rate of the liquid can be reduced due to the gradual increase of the cross sectional area of the water inlet 52, the heat storage balls 51 in the tank body 50 can be in full contact with the liquid and exchange heat with the liquid, and the heat exchange efficiency of the liquid in the tank body 50 can be improved.

In some embodiments of the present invention, as shown in fig. 1, the water inlets of the fluidized bead heat reservoir 28 and the superheater 23 may be respectively provided with flow valves with adjustable flow rates, it should be explained that the water inlet of the fluidized bead heat reservoir 28 may be provided with a flow valve, the water inlet of the superheater 23 may also be provided with a flow valve, specifically, the water inlet of the fluidized bead heat reservoir 28 may be provided with a flow valve of the first valve 15, the water inlet of the superheater 23 may be provided with a flow valve of the second valve 16, and the first valve 15 and the second valve 16 may adjust the flow rate of the blast furnace slag water flowing from the slag hot water tank 13 into the fluidized bead heat reservoir 28 and the superheater 23, so that the flow rate of the blast furnace slag water may be controlled through the first valve 15 and the second valve 16, thereby ensuring the operational reliability of the power generation system 100.

As some embodiments of the present invention, as shown in fig. 1, one end of the hot slag flushing water tank 13 may be connected to the slag flushing device 12, the other end of the hot slag flushing water tank 13 may be connected to one end of the slag flushing water pump 14, the other end of the slag flushing water pump 14 may be connected to a water inlet of the fluidized bead heat reservoir 28, the other end of the slag flushing water pump 14 may also be connected to a water inlet of the superheater 23, and the slag flushing water pump 14 pressurizes the blast furnace slag flushing water in the hot slag flushing water tank 13 and then pumps the pressurized blast furnace slag flushing water into the fluidized bead heat reservoir 28 and the superheater 23, so that the pressure of the blast furnace slag flushing water may be adjusted by the slag flushing water pump 14, and thus the blast furnace slag flushing water may be ensured to smoothly flow from the hot slag flushing water tank 13 into the fluidized bead heat reservoir 28 and.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.