CN204051379U - Periodic off-gases washing system - Google Patents
Periodic off-gases washing system Download PDFInfo
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- CN204051379U CN204051379U CN201420363634.9U CN201420363634U CN204051379U CN 204051379 U CN204051379 U CN 204051379U CN 201420363634 U CN201420363634 U CN 201420363634U CN 204051379 U CN204051379 U CN 204051379U
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- periodic
- gases
- washing
- scrubbing tower
- washing system
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Abstract
Periodic off-gases washing system disclosed in the utility model, comprise the high pressure water feeding pump for boiler, pressure-reducing valve, heat exchanger, scrubbing tower and the Membrane recovery unit MRU that are connected successively by pipeline, scrubbing tower is also connected with periodic off-gases supply.The easy damage that the washing water pump that periodic off-gases washing system of the present utility model solves existing periodic off-gases washing system exists and the shortcoming needing often maintenance, while decreasing power consumption, oil consumption, cooling-water consumption, it also avoid in the past to washing water pump operation maintenance frequently, make the maximizing efficiency washing, react simultaneously, while playing effect of energy, also reach the object of efficiency utilization.
Description
Technical field
The utility model belongs to technical field of chemical, is specifically related to a kind of periodic off-gases washing system.
Background technology
Off-gas in methanol synthesizing process needs to process in feeding Membrane recovery unit MRU, in order to the stable operation of the high molecular polymer film in diaphragm retracting device and total transform device, off-gas needs first to absorb liquid wherein and methyl alcohol component by scrubbing tower, make methanol content in off-gas lower than 200ppm, it is provide with reciprocating washing water pump that scrubbing tower washings originally designed, because washing water pump pressure ratio is large, complex structure, consumable accessory is many, in use, the plunger packing of washing water pump is even as short as one week every two weeks and will leaks, and change filler 3 to 5 back piston bars and will scratch, and then need to change piston rod, must irregularly change import and export check valve in addition, therefore make maintenance frequent, loss is huge.And if packing leaking will cause pump discharge flowed fluctuation amplitude larger, on the one hand easily cause washing exceeding standard of methanol content in rear gas component, the water yield size entering flash tank is on the other hand unstable, causes water content in crude carbinol unstable, and then affects the stable operation of rectifier unit.
Utility model content
The purpose of this utility model is to provide a kind of periodic off-gases washing system, the easy damage that the washing water pump solving existing periodic off-gases washing system exists and the shortcoming needing often maintenance.
The technical scheme that the utility model adopts is: periodic off-gases washing system, and comprise the high pressure water feeding pump for boiler, pressure-reducing valve, heat exchanger, scrubbing tower and the Membrane recovery unit MRU that are connected successively by pipeline, scrubbing tower is also connected with periodic off-gases supply.
Feature of the present utility model is also,
Scrubbing tower is also connected with washing water pump.
Pipeline between scrubbing tower and periodic off-gases supply is provided with flow control valve.
Membrane recovery unit MRU is provided with manual modulation valve.
The beneficial effects of the utility model are:
Periodic off-gases washing system of the present utility model is introduced one cold sealing water and is replaced high-pressure wash water to be pumped in scrubbing tower washing off-gas on high pressure washing pump outlet tube line, its high pressure washing water pump of can stopping using on the one hand, reduces the power consumption of pump, oil consumption, cooling-water consumption; On the other hand, high-pressure wash water pump operation maintenance loss frequently (comprise and change filler, replacing import and export check valve, replacing piston rod) is avoided; Finally, the washing water yield of running facilitates long-range flexible control, eliminates manual adjustment, and periodic off-gases washing system of the present utility model serves effect that is energy-saving and cost-reducing, efficiency utilization.
Accompanying drawing explanation
Fig. 1 is the structural representation of periodic off-gases washing system of the present utility model.
In figure, 1. high pressure water feeding pump for boiler, 2. pressure-reducing valve, 3. heat exchanger, 4. scrubbing tower, 5. Membrane recovery unit MRU, 6. periodic off-gases supply, 7. washing water pump, 8. flow control valve, 9. manual modulation valve.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the utility model is described in detail.
As shown in Figure 1, comprise the high pressure water feeding pump for boiler 1, pressure-reducing valve 2, heat exchanger 3, scrubbing tower 4 and the Membrane recovery unit MRU 5 that are connected successively by pipeline, scrubbing tower 4 is also connected with periodic off-gases supply 6 to the structure of the periodic off-gases washing system that the utility model provides.
Scrubbing tower 4 is also connected with washing water pump 7.
Pipeline between scrubbing tower 4 and periodic off-gases supply 6 is provided with flow control valve 8.
Membrane recovery unit MRU 5 is provided with manual modulation valve 9.
The coolant-temperature gage that high pressure water feeding pump for boiler 1 exports is 150 DEG C, internal pressure is 14.5MPa, after pressure-reducing valve 2, make water become intraductal pressure is 8.4MPa, water temperature is the heat seal water of 104 DEG C, heat seal water is for connecting a part of Pressure gauge of gasification and grey water treatment workshop section, flowmeter, liquid level gauge also rinses it, some is for the attemperator water of steam pipe system, heat exchanger 3 of the present utility model adopts model to be the heat exchanger of E7302, it is 8.4MPa that heat seal water becomes internal pressure after the cooling process of heat exchanger 3, temperature is the cold sealing water of 40 DEG C, and in prior art in washing water pump internal pressure be also 8.4MPa, temperature is 40 DEG C, cold sealing water is identical with the parameter of water in washing water pump, therefore cold sealing water can be utilized to replace the water of washing water pump to send into the periodic off-gases sent into by periodic off-gases supply 6 in scrubbing tower 4 wash, and flow control valve 8 can send into the periodic off-gases in scrubbing tower 4 according to concrete condition adjustment periodic off-gases supply 6 in scrubbing tower 4, and send into again in Membrane recovery unit MRU 5 through the washed periodic off-gases of scrubbing tower 4 and be further processed, and manual modulation valve 9 is for regulating the reaction speed in Membrane recovery unit MRU 5.And washing water pump 7 is in stand-by state, when the conveying of cold sealing water is broken down, washing water pump 7 pairs of scrubbing towers 4 are used to supply water.
By the way, water in high-pressure boiler is passed through decompression by periodic off-gases washing system of the present utility model, becoming cold sealing water after cooling replaces washing water pump to be that scrubbing tower supplies water, and make washing water pump be in stand-by state, not only save electric energy, the lubrication oil consumption of washing water pump also has the cooling water loss in washing water pump, and utilize flow control valve and manual modulation valve to regulate as the case may be, avoid manual adjustment washing water pump stroke to adjust water yield size, after effectively ensure that system stable operation while, also energy-saving and cost-reducing effect is served.
Claims (4)
1. periodic off-gases washing system, it is characterized in that, comprise the high pressure water feeding pump for boiler (1), pressure-reducing valve (2), heat exchanger (3), scrubbing tower (4) and the Membrane recovery unit MRU (5) that are connected successively by pipeline, described scrubbing tower (4) is also connected with periodic off-gases supply (6).
2. periodic off-gases washing system as claimed in claim 1, it is characterized in that, described scrubbing tower (4) is also connected with washing water pump (7).
3. periodic off-gases washing system as claimed in claim 1, is characterized in that, the pipeline between described scrubbing tower (4) and periodic off-gases supply (6) is provided with flow control valve (8).
4. periodic off-gases washing system as claimed in claim 1, is characterized in that, described Membrane recovery unit MRU (5) is provided with manual modulation valve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420363634.9U CN204051379U (en) | 2014-07-02 | 2014-07-02 | Periodic off-gases washing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420363634.9U CN204051379U (en) | 2014-07-02 | 2014-07-02 | Periodic off-gases washing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204051379U true CN204051379U (en) | 2014-12-31 |
Family
ID=52192973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420363634.9U Active CN204051379U (en) | 2014-07-02 | 2014-07-02 | Periodic off-gases washing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204051379U (en) |
-
2014
- 2014-07-02 CN CN201420363634.9U patent/CN204051379U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |