CN217498732U - Gasification slag water and waste heat recovery system - Google Patents
Gasification slag water and waste heat recovery system Download PDFInfo
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- CN217498732U CN217498732U CN202221431359.0U CN202221431359U CN217498732U CN 217498732 U CN217498732 U CN 217498732U CN 202221431359 U CN202221431359 U CN 202221431359U CN 217498732 U CN217498732 U CN 217498732U
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Abstract
The utility model belongs to the technical field of gasified slag water and waste heat recovery, in particular to a gasified slag water and waste heat recovery system, which comprises a gasified slag water device and a waste heat recovery device, wherein the gasified slag water device comprises a high-pressure flash tank and a low-pressure flash tank connected with a liquid outlet of the high-pressure flash tank, the liquid outlet of the low-pressure flash tank is connected with an inlet of a vacuum flash tank, and a liquid outlet at the bottom of the vacuum flash tank is separated in a separation process; waste heat recovery device is including exchanging the heat separator, it is linked together to exchange the heat separator import and low pressure flash tank top steam outlet, exchanges heat separator bottom liquid outlet and subsider UNICOM, and the heat separator top steam outlet is retrieved after the heat transfer with the lithium bromide unit and is recycled, the utility model has the advantages of simple structure, energy-concerving and environment-protective.
Description
Technical Field
The utility model belongs to the technical field of gasification slag water and waste heat recovery, especially, relate to a gasification slag water and waste heat recovery system.
Background
In chemical production, in a gasification raw material gasification device using coal, residual oil, multi-component slurry and the like as gasification raw materials, high-temperature crude synthesis gas produced by a gasification furnace is washed by chilled water and cooled, most of ash and fine particles are left in slag water and discharged as black water, and the discharge amount of the black water is 260m 3 The black water discharge amount of the washing tower is 40 m 3 H, total 300 m 3 How to concentrate and recycle the coal ash in the black water, and fully recycling the waste heat in the recycling process becomes a problem to be solved.
Disclosure of Invention
The utility model aims at providing a gasification sediment water and waste heat recovery system carries out concentrated recovery to gasification furnace and scrubbing tower exhaust black water among the chemical production, has both alleviateed the pressure of follow-up coal ash separation, also retrieves the waste heat of sediment water gasification in-process simultaneously and recycles, has the advantage of low carbon environmental protection.
In order to achieve the purpose, the utility model adopts the technical proposal that:
a gasified slag water and waste heat recovery system comprises a gasified slag water device and a waste heat recovery device, wherein the gasified slag water device comprises a high-pressure flash tank and a low-pressure flash tank connected with a liquid outlet of the high-pressure flash tank, the liquid outlet of the low-pressure flash tank is connected with an inlet of a vacuum flash tank, and a liquid outlet at the bottom of the vacuum flash tank is separated in a separation process; the waste heat recovery device comprises a heat exchange separator, an inlet of the heat exchange separator is communicated with a steam outlet at the top of the low-pressure flash tank, a liquid outlet at the bottom of the heat exchange separator is communicated with the settling tank, and a steam outlet at the top of the heat exchange separator exchanges heat with the lithium bromide unit and then is recycled.
Furthermore, the working pressure of the high-pressure flash tank is 0.50MPa, a steam pipeline is arranged at the top of the high-pressure flash tank, the steam pipeline is communicated with the inlet of the high-pressure flash stripping tower, and the inlet of the high-pressure flash tank is communicated with the black water outlets of the gasification furnace and the washing tower.
Further, the working pressure of the low-pressure flash tank is 0.30MPa, an outlet pipeline is arranged at the bottom of the low-pressure flash tank, and the outlet pipeline is communicated with the inlet of the settling tank.
Further, the vacuum degree of the vacuum flash tank is 0.05 MPa.
Furthermore, a hot water expansion tank is also arranged on the steam outlet pipeline at the top of the heat exchange separator.
The utility model has the advantages that: the utility model can recover the heat of the black water concentration stage to the maximum extent through the cooperative treatment of the three-level flash tank, and the whole process treatment is more energy-saving; the heat recovered in the concentration process is sent to a lithium bromide unit for heat exchange, the high-temperature desalted water (120 ℃) after heat exchange is sent to the lithium bromide unit to prepare chilled water, and the condensed steam is sent to a black water settling tank for continuous utilization, so that the method has the advantages of low carbon and environmental protection.
Drawings
Fig. 1 is a schematic view of the system flow of the present invention.
Fig. 2 is a schematic view of the waste heat recovery process of the present invention.
Detailed Description
As shown in the figure, the gasified slag water and waste heat recovery system comprises a gasified slag water device and a waste heat recovery device, wherein the gasified slag water device comprises a high-pressure flash tank 1, the working pressure of the high-pressure flash tank is 0.50MPa, the top of the high-pressure flash tank 1 is provided with a steam pipeline, the steam pipeline is communicated with the inlet of a high-pressure flash stripping tower, the inlet of the high-pressure flash tank is communicated with black water outlets of a gasification furnace and a washing tower, and a low-pressure flash tank 2 connected with a liquid outlet of the high-pressure flash tank is provided, the working pressure of the low-pressure flash tank 2 is 0.30MPa, the bottom of the low-pressure flash tank is provided with an outlet pipeline, the outlet pipeline is communicated with the inlet of a settling tank, the liquid outlet of the low-pressure flash tank 2 is connected with the inlet of a vacuum flash tank 3, the vacuum degree of the vacuum flash tank 3 is 0.05MPa, and the liquid outlet at the bottom of the flash tank 3 is separated in a separation process; the waste heat recovery device comprises a heat exchange separator 4, an inlet of the heat exchange separator 4 is communicated with a steam outlet at the top of a low-pressure flash tank 2, a liquid outlet at the bottom of the heat exchange separator 4 is communicated with a settling tank, a steam outlet at the top of the heat exchange separator 4 exchanges heat with a lithium bromide unit 5 and then is recovered and reused, a hot water expansion tank 6 is further arranged on a steam outlet pipeline at the top of the heat exchange separator 4, in an emergency situation, a waste heat recovery system can be interlocked with the hot water expansion tank to be quickly cut off, the operation of the whole large system is not influenced, and the safe and stable operation is fully guaranteed.
Claims (5)
1. The utility model provides a gasification slag water and waste heat recovery system which characterized in that: the system comprises a gasified slag water device and a waste heat recovery device, wherein the gasified slag water device comprises a high-pressure flash tank and a low-pressure flash tank connected with a liquid outlet of the high-pressure flash tank, the liquid outlet of the low-pressure flash tank is connected with an inlet of a vacuum flash tank, and a liquid outlet at the bottom of the vacuum flash tank is subjected to separation in a separation process; the waste heat recovery device comprises a heat exchange separator, an inlet of the heat exchange separator is communicated with a steam outlet at the top of the low-pressure flash tank, a liquid outlet at the bottom of the heat exchange separator is communicated with the settling tank, and a steam outlet at the top of the heat exchange separator exchanges heat with the lithium bromide unit and then is recycled.
2. The system for recycling slag water and waste heat in gasification of claim 1, wherein: the working pressure of the high-pressure flash tank is 0.50MPa, a steam pipeline is arranged at the top of the high-pressure flash tank and communicated with the inlet of the high-pressure flash stripping tower, and the inlet of the high-pressure flash tank is communicated with the black water outlets of the gasification furnace and the washing tower.
3. The slag water and waste heat recovery system of claim 2, wherein: the working pressure of the low-pressure flash tank is 0.30MPa, an outlet pipeline is arranged at the bottom of the low-pressure flash tank and communicated with the inlet of the settling tank.
4. The system for recycling slag water and waste heat in gasification of claim 3, wherein: the vacuum degree of the vacuum flash tank is 0.05 MPa.
5. The system for recycling slag water and waste heat in gasification of claim 4, wherein: and a hot water expansion tank is also arranged on the steam outlet pipeline at the top of the heat exchange separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221431359.0U CN217498732U (en) | 2022-06-09 | 2022-06-09 | Gasification slag water and waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221431359.0U CN217498732U (en) | 2022-06-09 | 2022-06-09 | Gasification slag water and waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217498732U true CN217498732U (en) | 2022-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221431359.0U Active CN217498732U (en) | 2022-06-09 | 2022-06-09 | Gasification slag water and waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217498732U (en) |
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2022
- 2022-06-09 CN CN202221431359.0U patent/CN217498732U/en active Active
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