阅读说明：本技术 一种能够回收余热的除尘系统 (Dust removal system capable of recovering waste heat ) 是由 董艳梅 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种能够回收余热的除尘系统,包括连接在锅炉尾部烟道上的粉尘吹送机构、与吹送机构连接的粉尘输送管、用于回收粉尘余热的换热机构以及粉尘回收机构,其中：所述吹送机构包括一带引风机的粉尘输送管道,所述换热机构包括一内设热交换管的换热箱体,所述热交换管外壁面上设有肋片,且所述热交换管的进口和出口均伸出换热箱体；所述回收机构包括连接在换热箱体上的收集管,所述收集管出口与一除尘机构连接。本发明能够实现除尘和余热利用功能,可广泛应用于除尘系统技术领域。(The invention discloses a dust removal system capable of recovering waste heat, which comprises a dust blowing mechanism connected to a tail flue of a boiler, a dust conveying pipe connected with the dust blowing mechanism, a heat exchange mechanism for recovering waste heat of dust and a dust recovery mechanism, wherein: the blowing mechanism comprises a dust conveying pipeline with a draught fan, the heat exchange mechanism comprises a heat exchange box body internally provided with heat exchange tubes, fins are arranged on the outer wall surfaces of the heat exchange tubes, and the inlets and the outlets of the heat exchange tubes extend out of the heat exchange box body; the recycling mechanism comprises a collecting pipe connected to the heat exchange box body, and an outlet of the collecting pipe is connected with a dust removal mechanism. The invention can realize the functions of dust removal and waste heat utilization, and can be widely applied to the technical field of dust removal systems.)

1. The utility model provides a dust pelletizing system that can retrieve waste heat, its characterized in that blows the mechanism, blows the dust conveyer pipe that the mechanism is connected, is used for retrieving the heat transfer mechanism and the dust recovery mechanism of dust waste heat including the dust of connection on boiler afterbody flue, with blowing the mechanism, wherein:

the blowing mechanism comprises a dust conveying pipeline with a draught fan, the heat exchange mechanism comprises a heat exchange box body internally provided with heat exchange tubes, fins are arranged on the outer wall surfaces of the heat exchange tubes, and the inlets and the outlets of the heat exchange tubes extend out of the heat exchange box body;

the recycling mechanism comprises a collecting pipe connected to the heat exchange box body, and an outlet of the collecting pipe is connected with a dust removal mechanism.

2. The dust removal system capable of recovering the waste heat according to claim 1, wherein one end of the dust conveying pipeline is connected to an air outlet of the induced draft fan, the other end of the dust conveying pipeline is connected with the heat exchange box body through an electromagnetic reversing valve, and the electromagnetic reversing valve is further connected with the dust removal mechanism through a bypass branch pipe; and a temperature display instrument is arranged on the conveying pipeline.

3. The dust removal system capable of recovering waste heat according to claim 2, wherein the temperature display instrument is in electrical signal connection with the electromagnetic directional valve through a temperature control module, and a manual control valve is further arranged on the dust conveying pipe;

the heat exchange tubes are arranged in the heat exchange box body in a snake shape, the fins are in a strip plate shape, and are integrally formed with the heat exchange tubes through one side edge of the fins; the heat exchange tube is also provided with a circulating pump and a manual valve.

4. The dust removing system capable of recovering the waste heat as claimed in claim 3, wherein the heat exchange tubes are arranged in a plurality of groups in the heat exchange box body and are connected in parallel with each other;

the heat exchange box body is also internally provided with a main inlet pipe and a main outlet pipe which are respectively connected with the inlet and the outlet of the heat exchange pipe, the main inlet pipe is connected with the inlet of the circulating pump, and the main outlet pipe is connected with the outlet of the circulating pump.

5. The dust removal system capable of recovering the waste heat according to claim 4, wherein the collecting pipe is connected to the lower end of the heat exchange box body, a high-pressure gas conveying pipeline is further arranged between the collecting pipe and the dust removal mechanism, and the high-pressure gas conveying pipeline is connected with a high-pressure gas storage tank;

the dust removal mechanism comprises a bag type dust remover, and the lower part of the dust remover is connected with an ash bucket.

6. The dust removal system capable of recovering waste heat according to claim 5, wherein a pressure gauge and a temperature gauge are connected to the high-pressure gas storage tank, and a manual control valve is arranged on the high-pressure gas delivery pipeline;

the heat exchange box body is of a conical cylindrical structure with a large upper part and a small lower part, and the surfaces of the fins are laid with smooth layers.

7. The dust removal system capable of recovering the waste heat according to claim 6, wherein an impact plate for impacting the blown pressed dust is arranged on the inner wall surface of the heat exchange box body, and one end of the impact plate is fixedly connected to the inner wall surface of the heat exchange box body in the direction close to the main outlet pipe; the width of the impact plate is smaller than the minimum inner diameter of the heat exchange box body.

Technical Field

The invention relates to the field of dust removal systems, in particular to a dust removal system capable of recovering waste heat.

Background

In the specific use process of the dust removal system in the prior art, the dust removal function is generally only utilized, so that the purpose of filtering harmful particles is achieved, and the filtered residual substances are discharged into specific equipment to complete the centralized treatment process. However, the treatment method has the problems that the utilization of the waste heat of the dust cannot be achieved, particularly in a thermal power plant, the dust in the tail flue of the boiler has certain high temperature, and the heat energy not only causes high-temperature corrosion to dust removal equipment but also causes energy waste and influences the thermodynamic efficiency in the process of not utilizing the heat energy.

Therefore, a dust removing system capable of solving the above problems has yet to be proposed.

Disclosure of Invention

Aiming at the problems, the invention provides a dust removal system capable of recycling waste heat of smoke dust.

The technical scheme provided by the invention is as follows:

the utility model provides a dust pelletizing system that can retrieve waste heat, blows the mechanism, with the dust conveyer pipe that blows the mechanism and be connected, the heat transfer mechanism and the dust recovery mechanism that are used for retrieving the dust waste heat including the dust of connection on boiler afterbody flue, wherein:

the blowing mechanism comprises a dust conveying pipeline with a draught fan, the heat exchange mechanism comprises a heat exchange box body internally provided with heat exchange tubes, fins are arranged on the outer wall surfaces of the heat exchange tubes, and the inlets and the outlets of the heat exchange tubes extend out of the heat exchange box body;

the recycling mechanism comprises a collecting pipe connected to the heat exchange box body, and an outlet of the collecting pipe is connected with a dust removal mechanism.

Furthermore, one end of the dust conveying pipeline is connected to an air outlet of the induced draft fan, the other end of the dust conveying pipeline is connected with the heat exchange box body through an electromagnetic directional valve, and the electromagnetic directional valve is also connected with the dust removal mechanism through a bypass branch pipe; and a temperature display instrument is arranged on the conveying pipeline.

Furthermore, the temperature display instrument is in electric signal connection with the electromagnetic directional valve through a temperature control module, and a manual control valve is further arranged on the dust conveying pipe;

the heat exchange tubes are arranged in the heat exchange box body in a snake shape, the fins are in a strip plate shape, and are integrally formed with the heat exchange tubes through one side edge of the fins; the heat exchange tube is also provided with a circulating pump and a manual valve.

Furthermore, the heat exchange tubes are arranged in a plurality of groups in the heat exchange box body and are connected in parallel;

the heat exchange box body is also internally provided with a main inlet pipe and a main outlet pipe which are respectively connected with the inlet and the outlet of the heat exchange pipe, the main inlet pipe is connected with the inlet of the circulating pump, and the main outlet pipe is connected with the outlet of the circulating pump.

Furthermore, the collecting pipe is connected to the lower end of the heat exchange box body, a high-pressure gas conveying pipeline is further arranged between the collecting pipe and the dust removal mechanism, and the high-pressure gas conveying pipeline is connected with a high-pressure gas storage tank;

the dust removal mechanism comprises a bag type dust remover, and the lower part of the dust remover is connected with an ash bucket.

Furthermore, the high-pressure gas storage tank is connected with a pressure gauge and a thermometer, and a manual control valve is arranged on the high-pressure gas conveying pipeline;

the heat exchange box body is of a conical cylindrical structure with a large upper part and a small lower part, and the surfaces of the fins are laid with smooth layers.

Furthermore, an impact plate for impacting the blown pressed dust is arranged on the inner wall surface of the heat exchange box body, and one end of the impact plate is fixedly connected to the inner wall surface of the heat exchange box body in the direction close to the main outlet pipe; the width of the impact plate is smaller than the minimum inner diameter of the heat exchange box body.

Compared with the prior art, the invention has the advantages that:

by providing the dust removal system with the heat exchange mechanism, the function of recycling waste heat of high-temperature smoke dust is realized, and then the loss of heat energy is reduced;

through combining heat transfer mechanism and blowing mechanism, recovery mechanism to reached and to have conveniently again to filter the flue gas on realizing waste heat utilization's basis, and then reached the purpose of systematized processing flue gas.

Drawings

FIG. 1 is a structural diagram of a heat exchange box in an embodiment of the present invention;

FIG. 2 is a connection diagram in an embodiment of the invention;

fig. 3 is a signal transmission flow chart in the embodiment of the present invention.

Detailed Description

The present invention is described in further detail below with reference to figures 1-3.

The utility model provides a dust pelletizing system that can retrieve waste heat, blows the mechanism, with the dust conveyer pipe 1 that blows the mechanism and be connected, the heat transfer mechanism and the dust recovery mechanism that are used for retrieving the dust waste heat including the dust of connection on boiler afterbody flue, wherein:

the blowing mechanism comprises a dust conveying pipeline 3 with a draught fan 2, the heat exchange mechanism comprises a heat exchange box body 5 internally provided with a heat exchange pipe 4, fins 6 are arranged on the outer wall surface of the heat exchange pipe 4, and an inlet and an outlet of the heat exchange pipe 4 extend out of the heat exchange box body 5;

the recovery mechanism comprises a collecting pipe 7 connected to the heat exchange box body 5, and an outlet of the collecting pipe 7 is connected with a dust removal mechanism.

The functions that the present invention can realize include:

firstly, flue gas generated by a boiler tail flue is sent to a heat exchange box body 5 through an induced draft fan 2, a dust conveying pipeline 3 connected to the induced draft fan 2 and a dust conveying pipe 1, so that a certain purging function for the boiler tail flue is realized, and further the stable operation of thermal equipment is ensured;

secondly, the heat exchange tube 4 is arranged in the heat exchange box body 5, and after the flue gas is conveyed into the heat exchange box body 5, the heat exchange tube 4 is scoured to a certain extent, so that the heat exchange tube 4 is heated; meanwhile, the heat exchange medium is conveyed into the heat exchange tube 4, so that the heat exchange medium in the heat exchange tube 4 is heated by using the waste heat of the flue gas, the function of recycling the waste heat in the flue gas is realized, and the waste of energy is reduced;

thirdly, the flue gas after heat exchange is collected and discharged through the collecting pipe 7, and then enters the dust removal mechanism for dust removal, thereby achieving the purpose of filtering harmful particles in the flue gas and reducing the air pollution amount.

Structurally, the heat exchange tube 4 is provided with the corresponding fins 6, so that the heat exchange surface area between the heat exchange tube and the flue gas is increased, the heat exchange efficiency between the heat exchange medium in the heat exchange tube 4 and the flue gas outside the heat exchange medium is increased, and the utilization degree of waste heat in the flue gas is increased.

One end of the dust conveying pipeline 3 is connected to an air outlet of the draught fan 2, the other end of the dust conveying pipeline is connected with the heat exchange box body 5 through an electromagnetic directional valve 8, and the electromagnetic directional valve 8 is further connected with the dust removing mechanism through a bypass branch pipe 9; a temperature display 10 is arranged on the dust conveying pipeline 3.

The temperature display instrument 10 is arranged on the dust conveying pipeline 3, so that the purpose of conveniently monitoring the temperature of the conveyed dust and conveying the dust into the heat exchange box body 5 by utilizing the electromagnetic directional valve 8 is achieved; in addition, in order to ensure the good operation of the equipment and fully utilize the waste heat in the flue gas, when the temperature displayed by the temperature display instrument 10 is higher, the dust conveying pipeline 3 connected to the heat exchange box 5 is opened, so that the flue gas with higher temperature is conveyed to the heat exchange box 5 to heat the heat exchange medium in the heat exchange tube 4, thereby realizing the utilization function of the waste heat in the flue gas and reducing the loss of energy. On the other hand, when the temperature displayed by the temperature display instrument 10 is lower than the preset value, the channel of the bypass branch pipe 9 is directly opened, so that the flue gas coming out of the tail flue is directly conveyed to the dedusting mechanism for dedusting.

The temperature display instrument 10 is in electric signal connection with the electromagnetic directional valve 8 through a temperature control module 11, and a manual control valve 12 is further arranged on the dust conveying pipe 1;

the heat exchange tube 4 is arranged in a serpentine shape in the heat exchange box body 5, the fins 6 are in a strip plate shape and are integrally formed with the heat exchange tube 4 through one side edge of the fins; the heat exchange tube 4 is also provided with a circulation pump 13 and a manual valve 14.

When the temperature monitored by the temperature display instrument 10 is higher, a signal is transmitted to the temperature control module 11, the temperature control module 11 controls the opening and closing of the electromagnetic directional valve 8, so that the direction of the heat exchange box body 5 or the direction of the bypass branch pipe 9 are selectively opened, and the purposes that the heat exchange medium is heated by the smoke when the temperature of the smoke is higher, and the smoke is directly introduced into the dust removal mechanism for dust removal when the temperature is not high are achieved.

When the heat exchange medium is heated by using the flue gas with higher temperature, the manual valve 14 can be opened for achieving the purpose of full heat exchange, and the heat exchange medium is pressurized by using the circulating pump 13, so that the purpose of promoting the forced flow of the heat exchange medium in the heat exchange pipe 4 and further fully absorbing heat is achieved, and the utilization efficiency of waste heat is improved.

The heat exchange tubes 4 are arranged in a plurality of groups in the heat exchange box body 5 and are connected in parallel;

the heat exchange box body 5 is also internally provided with a main inlet pipe 15 and a main outlet pipe 16 which are respectively connected with the inlet and the outlet of the heat exchange pipe 4, the main inlet pipe 15 is connected with the inlet of the circulating pump 13, and the main outlet pipe 16 is connected with the outlet of the circulating pump 13.

The heat exchange tubes 4 in the heat exchange box body 5 are arranged into a plurality of groups, so that the purpose of fully contacting with the heat exchange tubes 4 can be achieved, the retention time of the flue gas in the heat exchange box body 5 can be prolonged, and the heat exchange efficiency is improved.

In the actual operation process, the heat exchange box body 5 is provided with the plurality of heat exchange tubes 4 which are connected in parallel and achieve the purpose of uniform heat exchange of the heat exchange medium, and the corresponding main inlet tube 15 and the main outlet tube 16 are arranged, so that the heat exchange medium is fully mixed after heat exchange, and the heat exchange medium with uniform temperature is output. In the process, the heat exchange medium can be different media such as water, and after the temperature is raised, the heat exchange medium can be applied to other environments needing hot water.

The collecting pipe 7 is connected with the lower end of the heat exchange box body 5, a high-pressure gas conveying pipeline 17 is further arranged between the collecting pipe 7 and the dust removal mechanism, and the high-pressure gas conveying pipeline 17 is connected with a high-pressure gas storage tank 18;

the dust removing mechanism comprises a bag type dust remover, and the lower part of the dust remover is connected with an ash bucket.

In the process of filtering and dedusting the flue gas after heat exchange, high-pressure gas such as compressed air is conveyed into the collecting pipe 7 and then enters the dedusting equipment along with the flue gas after heat exchange, so that the speed of the flue gas entering the filtering mechanism can be increased, and the filtering efficiency is improved.

A pressure gauge and a thermometer are connected to the high-pressure gas storage tank 18, and a manual control valve 19 is arranged on the high-pressure gas conveying pipeline 17;

the heat exchange box body 5 is a conical cylindrical structure with a large upper part and a small lower part, and the surface of the fins 6 is laid with a smooth layer.

An impact plate 20 for impacting the blown pressed dust is arranged on the inner wall surface of the heat exchange box body 5, and one end of the impact plate 20 is fixedly connected to the inner wall surface of the heat exchange box body 5 in the direction close to the main outlet pipe 16; the width of the impingement plate 20 is smaller than the smallest inner diameter of the heat exchange case 5.

Set up impingement plate 20 in heat transfer box 5, not only can reach the purpose of effectively assaulting the flue gas that enters into in heat transfer box 5, after the flue gas is carried to heat transfer box 5 in addition, can form the impact to impingement plate 20, the flue gas can take place to turn back after that to continue to stop in heat transfer box 5, and then heat exchange medium in the hot exchange pipe 4 once more, thereby improved and the flue gas between heat exchange efficiency.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.