阅读说明：本技术 一种蒸汽循环利用的废水处理系统及其处理方法 (Wastewater treatment system and method for recycling steam ) 是由 王前 黄小芳 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种蒸汽循环利用的废水处理系统及其处理方法,其包括入汽管道,入汽管道连通有透平机构,透平机构连通有废水蒸发处理装置,透平机构旋转输出轴上连接有蒸汽压缩机,蒸汽压缩机进出汽口分别连通于废水蒸发处理装置；透平机构包括高压驱动蒸汽进汽管和与高压驱动蒸汽进汽管连通的驱动腔,驱动腔内设置有金属转子,金属转子连接有旋转输出轴,旋转输出轴驱动蒸汽压缩机,中压一次蒸汽输送管道连接于废水蒸发处理装置；低压二次蒸汽出口连接有低压二次蒸汽排汽管,低压二次蒸汽排汽管连接于所述蒸汽压缩机的进汽口。本发明具有能够利用驱动蒸汽(即中压一次蒸汽)的余压进行能量回收,从而将低压二次蒸汽循环利用,大幅减少能耗的效果。(The invention discloses a waste water treatment system for recycling steam and a treatment method thereof, wherein the waste water treatment system comprises a steam inlet pipeline, the steam inlet pipeline is communicated with a turbine mechanism, the turbine mechanism is communicated with a waste water evaporation treatment device, a rotary output shaft of the turbine mechanism is connected with a steam compressor, and steam inlets and steam outlets of the steam compressor are respectively communicated with the waste water evaporation treatment device; the turbine mechanism comprises a high-pressure driving steam inlet pipe and a driving cavity communicated with the high-pressure driving steam inlet pipe, a metal rotor is arranged in the driving cavity, the metal rotor is connected with a rotary output shaft, the rotary output shaft drives a steam compressor, and a medium-pressure primary steam conveying pipeline is connected to the wastewater evaporation treatment device; the low-pressure secondary steam outlet is connected with a low-pressure secondary steam exhaust pipe, and the low-pressure secondary steam exhaust pipe is connected to the steam inlet of the steam compressor. The invention has the advantages that the energy recovery can be carried out by utilizing the residual pressure of the driving steam (namely the medium-pressure primary steam), so that the low-pressure secondary steam is recycled, and the energy consumption is greatly reduced.)

1. a waste water treatment system with steam recycling is characterized in that: the device comprises a steam inlet pipeline (1), wherein the steam inlet pipeline (1) is communicated with a turbine mechanism (2), a steam outlet of the turbine mechanism (2) is connected with a wastewater evaporation treatment device (3), a rotary output shaft (25) of the turbine mechanism (2) is connected with a steam compressor (4), and a steam outlet of the steam compressor (4) is communicated with the wastewater evaporation treatment device (3);

The turbine mechanism (2) comprises a high-pressure driving steam inlet pipe (21) and a driving cavity (22) communicated with the high-pressure driving steam inlet pipe (21), a metal rotor (23) is arranged in the driving cavity (22), the metal rotor (23) is connected with a rotary output shaft (25), the rotary output shaft (25) drives a steam compressor (4), a steam outlet of the driving cavity (22) is connected with a medium-pressure primary steam conveying pipeline (24), the medium-pressure primary steam conveying pipeline (24) is connected to the wastewater evaporation treatment device (3), the wastewater evaporation treatment device (3) is provided with an evaporator (31), and the evaporator (31) is provided with a medium-pressure primary steam inlet (32) and a low-pressure secondary steam exhaust pipe (33); the low-pressure secondary steam exhaust pipe (33) is connected to a steam inlet (41) of the steam compressor (4).

2. The steam recycling wastewater treatment system according to claim 1, wherein: the middle section of the driving cavity (22) is connected with a medium-pressure primary steam explosion-proof exhaust pipe (221), and a medium-pressure primary steam pressure valve (222) is arranged on the medium-pressure primary steam explosion-proof exhaust pipe (221).

3. The steam recycling wastewater treatment system according to claim 2, wherein: the steam compressor (4) is connected with the wastewater evaporation treatment device (3).

4. A steam recycling wastewater treatment system according to claim 3 and further comprising: the low-pressure secondary steam explosion-proof exhaust pipe (5) is arranged on the evaporator (31), and a low-pressure secondary steam pressure valve (51) is arranged on the low-pressure secondary steam explosion-proof exhaust pipe (5).

5. The steam recycling wastewater treatment system according to claim 4, wherein: and a surplus steam output pipe (331) is arranged at the low-pressure secondary steam outlet.

6. The steam recycling wastewater treatment system according to claim 5, wherein: and a transparent window (35) is arranged on the evaporator (31) along the vertical direction.

7. The wastewater treatment system for steam recycling according to claim 6, wherein: the metal rotor (23) is connected with a reduction gearbox (231), and an output shaft of the reduction gearbox (231) drives the steam compressor (4).

8. A waste water evaporation treatment method for steam recycling is characterized in that:

firstly, high ~ pressure driving steam enters a driving cavity (22) through a steam inlet pipeline (1) at the speed of 10 ~ 60 m/s, the high ~ pressure driving steam enters the driving cavity (22) and drives a metal rotor (23) to rotate, the high ~ pressure driving steam is converted into medium ~ pressure primary steam, the pressure of the medium ~ pressure primary steam is about 1bar, and meanwhile, the rotating metal rotor (23) outputs rotating work to the outside;

Step two, the medium-pressure primary steam enters the wastewater evaporation treatment device (3) through the medium-pressure primary steam conveying pipeline (24), and after passing through the wastewater evaporation treatment device (3), the medium-pressure primary steam is condensed into primary condensate after releasing heat in the evaporator (31) and is discharged by a condensate pump;

The discharged heat heats the raw material wastewater, so that the raw material wastewater is evaporated into low-pressure secondary steam;

Step three: the low-pressure secondary steam from the evaporator (31) enters a steam inlet (41) of a steam compressor (4), is subjected to pressure rise and temperature rise by the steam compressor (4) driven by a turbine and then is changed into medium-pressure primary steam, and the medium-pressure primary steam is discharged from a steam outlet of the compressor;

Step four: the medium-pressure primary steam from the steam outlet of the steam compressor (4) and the low-pressure secondary steam from the steam outlet of the turbine are mixed and then enter an evaporator (31) of the wastewater evaporation treatment device (3) to be used as a heating source, so that the cyclic utilization of the steam is realized;

step five: the surplus low-pressure secondary steam is supplied to other heat users through a surplus steam output pipe (331).

Technical Field

The invention relates to the technical field of wastewater treatment equipment, in particular to a wastewater treatment system for steam recycling and a treatment method thereof.

background

Wastewater treatment (wastewater treatment methods) is to treat wastewater by physical, chemical and biological methods, so that the wastewater is purified and pollution is reduced, and the wastewater is recycled and reused, and water resources are fully utilized.

in the prior art, during waste water treatment, waste water is required to be heated frequently, so that steam with certain temperature and certain high pressure is required to heat the waste water, but the steam commonly used by enterprises is usually supplied by other external enterprises through pipelines, the grade of the supplied steam is usually higher than the requirement of the enterprises, and temperature and pressure reduction is required, so that energy waste is caused.

Disclosure of Invention

The invention aims to provide a wastewater treatment system which has low energy consumption, can effectively utilize the residual pressure of high-pressure driving steam to realize steam recycling and output partial low-pressure secondary steam to the outside.

The technical purpose of the invention is realized by the following technical scheme:

The device comprises a steam inlet pipeline, wherein the steam inlet pipeline is communicated with a turbine mechanism, a steam outlet of the turbine mechanism is connected with a wastewater evaporation treatment device, a rotary output shaft of the turbine mechanism is connected with a steam compressor, and a steam outlet of the steam compressor is communicated with the wastewater evaporation treatment device;

The turbine mechanism comprises a high-pressure driving steam inlet pipe and a driving cavity communicated with the high-pressure driving steam inlet pipe, a metal rotor is arranged in the driving cavity, the metal rotor is connected with a rotary output shaft, the rotary output shaft drives a steam compressor, a steam outlet of the driving cavity is connected with a medium-pressure primary steam conveying pipeline, the medium-pressure primary steam conveying pipeline is connected to a wastewater evaporation treatment device, the wastewater evaporation treatment device is provided with an evaporator, and the evaporator is provided with a medium-pressure primary steam inlet and a low-pressure secondary steam outlet; the low-pressure secondary steam outlet is connected with a low-pressure secondary steam exhaust pipe, and the low-pressure secondary steam exhaust pipe is connected to the steam inlet of the steam compressor.

Through adopting above-mentioned technical scheme, the admission pipeline lets in high pressure drive steam with high pressure drive steam admission pipe, and high pressure drive steam gets into the drive chamber, drives the metal rotor and rotates to because high pressure drive steam turns into self heat energy power potential energy and outwards does work, thereby temperature pressure reduces, changes into the steam of middling pressure, accords with the use specification of mill. Meanwhile, the turbine applies work outwards, the output rotary kinetic energy is used for driving the steam compressor, low-pressure secondary steam generated by the evaporator is compressed to medium-pressure primary steam from the low-pressure secondary steam, the low-pressure secondary steam also meets the use specification of a factory, and the two parts of medium-pressure primary steam are mixed together to be used as a heating source of the wastewater evaporation treatment device, so that the steam quantity is increased, the condensation heat loss is reduced, and the energy is recycled.

The invention is further configured to: the middle section of the driving cavity is connected with a medium-pressure primary steam explosion-proof exhaust pipe, and a medium-pressure primary steam pressure valve is arranged on the explosion-proof exhaust pipe.

through adopting above-mentioned technical scheme, through the pressure in the steam pressure valve measurement drive chamber of middling pressure, reduce the condition that the too big machine that causes of pressure in the drive pressure storehouse damages. If the pressure is too high, the first pressure valve is opened, and the steam with the excessive pressure is discharged through the medium-pressure primary steam explosion-proof steam discharge pipe.

The invention is further configured to: the steam compressor is connected with the wastewater evaporation treatment device.

through adopting above-mentioned technical scheme, can input waste water evaporation treatment device once more with the middling pressure steam after the vapor compressor compression, carry out recycling.

The invention is further configured to: the low-pressure secondary steam explosion-proof exhaust pipe is arranged on the evaporator, and a low-pressure secondary steam pressure valve is arranged on the low-pressure secondary steam explosion-proof exhaust pipe.

Through adopting above-mentioned technical scheme, realize stepping down to high pressure drive steam, warm low pressure steam raises the pressure simultaneously, detects the pressure in the pipeline through low pressure secondary steam pressure valve simultaneously, when pressure exceeded the upper limit, opened the explosion-proof steam exhaust pipe of low pressure steam and carry out the steam extraction and step down.

the invention is further configured to: and a surplus steam output pipe is arranged at the low-pressure secondary steam outlet.

By adopting the technical scheme, surplus steam can be output for other hot users, and the purpose of reducing waste is achieved.

The invention is further configured to: and a transparent window is arranged on the evaporator along the vertical direction.

By adopting the technical scheme, the water quantity in the evaporator can be conveniently observed by a worker, and the purpose of real-time monitoring is achieved.

The invention is further configured to: the metal rotor is connected with a reduction gearbox, and an output shaft of the reduction gearbox drives a steam compressor.

By adopting the technical scheme, the rotating speed of the metal rotor can be adjusted to be suitable for the rotating speed of the steam compressor through the reduction gearbox.

The invention also aims to provide a wastewater treatment method for recycling steam.

the technical purpose of the invention is realized by the following technical scheme:

the method comprises the steps that firstly, high ~ pressure driving steam enters a driving cavity through a steam inlet pipeline at the speed of 10 ~ 60 m/s, the high ~ pressure driving steam enters the driving cavity and drives a metal rotor to rotate, the high ~ pressure driving steam is converted into medium ~ pressure primary steam, the pressure of the medium ~ pressure primary steam is about 1bar, and meanwhile, the rotating metal rotor outputs rotating work outwards.

And step two, the medium-pressure primary steam enters the wastewater evaporation treatment device through a medium-pressure primary steam conveying pipeline, and after passing through the wastewater evaporation treatment device, the medium-pressure primary steam is condensed into primary condensate after releasing heat in an evaporator and is discharged by a condensate pump. The discharged heat heats the raw wastewater, so that the raw wastewater is evaporated into low-pressure secondary steam.

Step three: the low-pressure secondary steam from the evaporator enters a steam inlet of the compressor, is boosted and heated by the steam compressor driven by the turbine to become medium-pressure primary steam, and the medium-pressure primary steam is discharged from a steam outlet of the steam compressor.

step four: the medium-pressure primary steam from the steam outlet of the steam compressor and the low-pressure secondary steam from the steam outlet of the turbine are mixed and then enter an evaporator of the wastewater evaporation treatment device to be used as a heating source, so that the cyclic utilization of the steam is realized.

Step five: and the surplus low-pressure secondary steam is supplied to other heat users through a surplus steam output pipe.

in conclusion, the beneficial effects of the invention are as follows:

1. A turbine mechanism is adopted, so that the high-pressure driving steam is converted into medium-pressure primary steam, and simultaneously, the rotating work is output;

2. The rotating shaft driven by the metal rotor is adopted, and the rotating work output from the turbine is utilized to drive the steam compressor, so that the low-pressure secondary steam generated by the evaporator is compressed and then recycled, and the aim of saving energy is fulfilled;

3. The medium-pressure primary steam and the low-pressure secondary steam are mixed to be used as heating steam together, so that the increase of the medium-pressure primary steam quantity is realized, and the purpose of saving the steam consumption is realized;

4. According to the conservation of energy, the amount of the medium-pressure primary steam is increased, part of the low-pressure secondary steam is inevitably abundant, and the part of the steam can be used for heating, bathing, heat tracing or process heating of other heat users, so that the heat supply output is realized.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

In the figure, 1, a steam inlet pipeline; 2. a turbine mechanism; 21. driving a steam inlet pipe at high pressure; 22. a drive chamber; 221. a medium-pressure primary steam explosion-proof exhaust pipe; 222. medium pressure primary steam pressure valve; 23. a metal rotor; 231. a reduction gearbox; 24. a medium pressure primary steam delivery conduit; 25. rotating the output shaft; 3. a wastewater evaporation treatment device; 31. an evaporator; 32. a medium pressure primary steam inlet; 33. a low-pressure secondary steam exhaust pipe; 331. a surplus steam output pipe; 35. a transparent window; 4. a vapor compressor; 41. a steam inlet; 5. a low-pressure secondary steam explosion-proof exhaust pipe; 51. low pressure secondary steam pressure valve.

Detailed Description

the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the waste water evaporation treatment system for recycling steam and the treatment method thereof disclosed by the invention comprise a steam inlet pipeline 1 into which high-pressure driving steam is introduced, wherein the steam inlet pipeline 1 is communicated with a turbine mechanism 2, the turbine mechanism 2 converts the high-pressure driving steam into medium-pressure primary steam for use by a waste water evaporation treatment device 3 of a factory, and after the waste water evaporation treatment system is used, the medium-pressure primary steam is condensed into condensed water, and simultaneously, heat is released to evaporate raw waste water into low-pressure secondary steam. 2 output drive steam compressor 4 of turbine mechanism, steam compressor 4 turns into the primary steam of middling pressure with low pressure steam, and the low pressure steam of waste water evaporation treatment device 3 communicates steam compressor 4, and steam compressor 4 turns into the primary steam of middling pressure with low pressure steam and continues to supply waste water evaporation treatment device 3 to use to play steam and recycle and carry out energy recuperation's effect.

Referring to fig. 1, the turbine mechanism 2 includes a high-pressure driving steam inlet pipe 21 and a driving chamber 22 communicating with the high-pressure driving steam inlet pipe 21, and the driving chamber 22 has a shape in which a steam inlet is small and an end away from the steam inlet is gradually enlarged. The metal rotor 23 is arranged in the driving cavity 22, the metal rotor 23 is connected with a rotary output shaft 25, the rotary output shaft 25 is connected with a reduction box 231, the output shaft of the reduction box 231 drives the steam compressor 4, and the reduction box 231 adjusts the rotating speed of the metal rotor 23 to be suitable for the rotating speed of the steam compressor 4. High-pressure driving steam is introduced into the high-pressure driving steam inlet pipe 21, enters the driving cavity 22 and drives the metal rotor 23 to rotate, the high-pressure driving steam converts self heat energy into power potential energy to do work outwards, and therefore temperature and pressure are reduced and converted into medium-pressure primary steam, and the use specification of a factory is met. The steam outlet of the driving cavity 22 is provided with a medium-pressure primary steam conveying pipeline 24, and the medium-pressure primary steam conveying pipeline 24 is connected to the wastewater evaporation treatment device 3 for performing wastewater evaporation treatment. In this embodiment, the middle section of the driving cavity 22 is connected with a medium-pressure primary steam explosion-proof exhaust pipe 221, the explosion-proof exhaust pipe is provided with a medium-pressure primary steam pressure valve 222, the pressure in the driving cavity 22 is measured through the medium-pressure primary steam pressure valve 222, if the pressure is too high, the medium-pressure primary steam pressure valve 222 is opened, and the steam with too high pressure is exhausted through the medium-pressure primary steam explosion-proof exhaust pipe 221, so that the overall safety is improved.

Referring to fig. 1, the wastewater evaporation treatment apparatus 3 includes an evaporator 31, and the evaporator 31 is provided with a medium-pressure primary steam inlet 32 for steam inlet and a low-pressure secondary steam exhaust pipe 33 for steam exhaust. The medium-pressure primary steam inlet is connected to the steam inlet 41 of the steam compressor 4, the low-pressure secondary steam exhaust pipe 33 is connected to the steam inlet 41 of the steam compressor 4, and the medium-pressure primary steam compressed by the steam compressor 4 can be input into the evaporator 31 again for recycling.

Referring to fig. 1, in the present embodiment, the evaporator 31 is provided with a low-pressure secondary steam explosion-proof exhaust pipe 5, and the low-pressure secondary steam explosion-proof exhaust pipe 5 is provided with a low-pressure secondary steam pressure valve 51 for detecting an internal pressure. It is possible to detect the pressure in the evaporator 31, and if the pressure in the evaporator 31 is excessive, the low pressure secondary steam pressure valve 51 is opened and the excessive pressure steam is discharged through the low pressure secondary steam explosion-proof exhaust pipe 5.

The processing method comprises the following steps: the method comprises the following steps: high-pressure driving steam enters a driving cavity 22 through a steam inlet pipeline 1 with the diameter of 0.5 meter at the speed of 20 m/s, the high-pressure driving steam enters the driving cavity 22 and drives a metal rotor 23 to rotate, the high-pressure driving steam is converted into medium-pressure primary steam, and the pressure of the medium-pressure primary steam is 1 bar;

and step two, the medium-pressure primary steam enters a wastewater evaporation treatment device 25 through a medium-pressure primary steam conveying pipeline 24 of the driving cavity 22, is condensed into primary condensate after heat is discharged from an evaporator after passing through the wastewater evaporation treatment device 25, and is discharged by a condensate pump. The discharged heat heats the raw wastewater, and the raw wastewater is evaporated into low-pressure secondary steam.

Step three: the low-pressure secondary steam generated in the evaporator enters the steam inlet of the steam compressor 4, is pressurized again by the steam compressor 4 to form medium-pressure primary steam, reaches the pressure of 1bar, and then enters the evaporator of the wastewater evaporation treatment device 25 again to circularly heat and evaporate the raw wastewater.

And (3) economic benefit analysis:

1. in the embodiment, the medium-pressure heating steam is required to be 6 tons/hour, the high-pressure driving steam is consumed to be 3.2 tons/hour, the low-pressure secondary steam is compressed to be 5.8 tons/hour, and the surplus low-pressure secondary steam is 3 tons/hour.

2. The high pressure driving steam is calculated according to 200 yuan/ton, the low pressure secondary steam is calculated according to 50 yuan/ton, and the low pressure secondary steam is calculated according to 8000 work hours each year.

3. the cost of high-pressure driving steam consumed each year is 512 ten thousand yuan, the economic benefit generated by low-pressure secondary steam external supply each year is 120 ten thousand yuan, and the actual cost of steam is 392 ten thousand yuan each year.

4. The steam consumption cost of direct steam heating is 960 ten thousand yuan.

5. The steam cost is saved by 568 ten thousand yuan per year.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.