CN205055708U - A washing system for methyl alcohol system alkene - Google Patents
A washing system for methyl alcohol system alkene Download PDFInfo
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- CN205055708U CN205055708U CN201520794238.6U CN201520794238U CN205055708U CN 205055708 U CN205055708 U CN 205055708U CN 201520794238 U CN201520794238 U CN 201520794238U CN 205055708 U CN205055708 U CN 205055708U
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Abstract
The utility model provides a washing system for methyl alcohol system alkene. This washing system includes: the water wash column is provided with product gas entry, water inlet, the export of first eluate and the export of product gas, washing water supply jar is provided with first eluate entry, feed water entry, cleaning water outlet and circulating air export, first eluate export on the water wash column enters the mouth with the first eluate of wasing on the water supply jar respectively to and be linked together with MTO washing unit, cleaning water outlet on the washing water supply jar is linked together with the water inlet on the water wash column, and the product gas export on the water wash column is linked together with the caustic wash tower. Use the feed water to replace MTO to purify waste water, can solve effectively that it purifies waste water to use and wash product gas and easily lead to the fact the problem that the butter gathered in the caustic wash tower. Can carry out recycle to washing water simultaneously, reduce the technology cost.
Description
Technical field
The utility model relates to methanol-to-olefins field, in particular to a kind of water wash system for methanol-to-olefins.
Background technology
The route of producing of traditional ethene, propylene is produced by naphtha pyrolysis, and its shortcoming too relies on oil.By the technique (Methanol-to-Olefin of the low-carbon alkenes such as Methanol ethene, propylene, be called for short MTO) successfully to instead of with naphtha be the process route of raw material alkene, thus open the new technology route by coal or natural gas via gasification production basis Organic Chemicals.MTO technology successful commercialization opens a brand-new Modern Coal-based Chemical technology path, and this has great importance to energy development.But containing a large amount of oxides in the gas product of MTO technique, although greatly can reduce the content of oxide in product through over-quenching and water wash system washing, but the oxide having trace can enter in gas product compressor along with gas product.If do not remove the oxide of these trace, above-mentioned oxide can be accumulated in the caustic washing system between compressor section, forms a large amount of butter, affects alkali cleaning effect, can block salkali waste discharge tube time serious.So be provided with a water scrubber (produce the MTO device of 600,000 tons per year, the washing water yield is at about 60t/h) before caustic washing system.For using water wisely, what water scrubber utilized MTO unit purifies waste water as washings, the oxide in removing gas product.But in actual production, there will be following problem with purifying waste water as washings:
(1) along with the operation of MTO device, middle meeting of purifying waste water contains catalyst and heavier macromolecular compound, and the operating temperature of separation of olefins water scrubber is at about 40 DEG C, and macromolecular compound heavier at this temperature can be rendered as solid-state.Above-mentioned solid and catalyst gather in water scrubber, easily cause the blocking of filler in water scrubber or column plate.But at the production initial stage, the problems referred to above, be difficult to be found, when accumulation reaches some, water scrubber pressure reduction can be made to increase, thus gas product is carried secretly purify waste water to enter caustic washing system, and containing a large amount of oxides in purifying waste water, and then the problems referred to above can still can cause gathering a large amount of butter in caustic wash tower.
(2) making the boiler feedwater that boiler feedwater can consume 50t/h into purifying waste water, which greatly enhances the operating cost of factory.
Utility model content
Main purpose of the present utility model is to provide a kind of water wash system for methanol-to-olefins, to solve in existing MTO technique, when use MTO purifies waste water and washs gas product, the catalyst of purifying waste water and the larger macromolecular compound of molecular weight easily gather with butter form in caustic wash tower, and use boiler water to replace MTO to purify waste water easily to improve the problem of process costs.
To achieve these goals, the utility model aspect provides a kind of water wash system for methanol-to-olefins, and water wash system comprises: water scrubber, is provided with gas product entrance, water inlet, the first eluate outlet and product gas outlet; Washings charging-tank, is provided with the first eluate entrance, boiler water entrance, washings outlet and circulating air outlet; The first eluate outlet on water scrubber respectively with the first eluate entrance on washings charging-tank, and wash unit with MTO and be connected; Washings outlet on washings charging-tank is connected with the water inlet on water scrubber, and the product gas outlet on water scrubber is connected with caustic wash tower.
Further, also comprise the gas product charging-tank being arranged on water scrubber upstream, gas product charging-tank is provided with air supply opening, air supply opening is connected with the gas product entrance on water scrubber.
Further, the inside of water scrubber is provided with water-oil separating room, and water-oil separating room comprises the oily storage tank and water storage tank that separate with dividing plate; Wherein, oily storage tank is provided with the second eluate outlet, and the first eluate outlet is arranged on water storage tank; Gas product charging-tank is also provided with Ethylene recov entrance, and Ethylene recov entrance exports with the second eluate on water scrubber and is connected.
Further, oily storage tank is also provided with the first Liquid level table, the stream between Ethylene recov entrance and the second eluate export also is provided with the first fluid level control valve, and the first Liquid level table is electrically connected with the first fluid level control valve.
Further, water storage tank is also provided with the second Liquid level table, the first eluate outlet and MTO wash on the stream between unit and are provided with the second fluid level control valve, and the second Liquid level table is electrically connected with the second fluid level control valve; And/or washings charging-tank being also provided with the 3rd Liquid level table, the stream between the first eluate outlet and washings charging-tank is provided with the 3rd fluid level control valve, and the 3rd Liquid level table is electrically connected with the 3rd fluid level control valve.
Further, on stream between the water inlet of water scrubber and the washings of washings charging-tank export, also be provided with washings cooler and washings delivery pump, stream between washings cooler and water inlet is provided with first flow control valve and first flow control table, and first flow control valve and first flow control table electrical connection.
Further, gas product charging-tank is also provided with and reclaims gas entrance, and reclaim gas entrance and export with the circulating air on washings charging-tank and be connected.
Further, the circulating air on washings charging-tank exports on the stream between the recovery gas entrance of gas product charging-tank, is also provided with manually-operated gate.
Further, on the stream between the air supply opening and the gas product entrance of water scrubber of gas product charging-tank, gas compressor and gas product cooler is also provided with.
Further, water wash system also comprises boiler water feedway, boiler water entrance is connected with boiler water feedway, and on stream between boiler water entrance and boiler water feedway, also be provided with the second flow control meter and second control valve, the second flow control meter is electrically connected with second control valve.
Application the technical solution of the utility model, uses boiler water to replace MTO to purify waste water, thus root, effectively can solve use purify waste water and wash to gas product the problem easily causing butter in caustic wash tower to gather.Simultaneously in above-mentioned water wash system, washings enter after water scrubber carries out water-washing process, can enter in washings charging-tank and recycle, thus be conducive to the cost reducing whole washing process with the form of the first eluate.The reason of above-mentioned two aspects makes gas product after the water wash system washing that the utility model provides, and the phenomenon that a large amount of butter can not be caused after entering caustic washing system to gather, also helps the cost reducing washing process simultaneously.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows a kind of preferred structural representation for the water wash system of methanol-to-olefins that the utility model provides;
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
100, water scrubber; 101, gas product entrance; 102, water inlet; 103, the first eluate outlet; 104, product gas outlet; 105, oily storage tank; 106, water storage tank; 107, the second eluate outlet; 108, the first Liquid level table; 109, the first fluid level control valve; 111, the second Liquid level table; 112, the second fluid level control valve; 113, epimere differential pressure indicator; 114, interlude differential pressure indicator; 115, hypomere differential pressure indicator;
200, washings charging-tank; 201, the first eluate entrance; 202, boiler water entrance; 203, washings outlet; 204, circulating air outlet; 205, the 3rd Liquid level table; 206, the 3rd fluid level control valve; 207, manually-operated gate; 210, washings cooler; 220, washings delivery pump; 211, first flow control valve; 212, first flow control table;
300, gas product charging-tank; 301, air supply opening; 302, Ethylene recov entrance; 303, gas entrance is reclaimed; 304, gas product liberation port; 310, gas compressor; 320, gas product cooler; 400, boiler water feedway; 401, the second flow control meter; 402, second control valve.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
The utility model provides a kind of water wash system for methanol-to-olefins, and as shown in Figure 1, this water wash system comprises: water scrubber 100, is provided with gas product entrance 101, water inlet 102, first eluate outlet 103 and product gas outlet 104; Washings charging-tank 200, is provided with the first eluate entrance 201, boiler water entrance 202, washings outlet 203 and circulating air outlet 204; The first eluate outlet 103 on water scrubber 100 is respectively with the first eluate entrance 201 on washings charging-tank 200 and wash unit with MTO and be connected, washings outlet 203 on washings charging-tank 200 is connected with the water inlet 102 on water scrubber 100, and the product gas outlet 104 on water scrubber 100 is connected with caustic wash tower.
Containing impurity such as catalyst and the higher macromolecular compounds of molecular weight in boiler water, use boiler water to replace MTO to purify waste water in the water wash system that the utility model provides, thus root, effectively can solve use purify waste water the problem easily causing butter in caustic wash tower to gather is washed to gas product.Simultaneously in above-mentioned water wash system, washings enter after water scrubber 100 carries out water-washing process, can enter in washings charging-tank 200 and recycle, thus be conducive to the cost reducing whole washing process with the form of the first eluate.The reason of above-mentioned two aspects makes gas product after the water wash system washing that the utility model provides, and the phenomenon that a large amount of butter can not be caused after entering caustic washing system to gather, also helps the cost reducing washing process simultaneously.
In actual mechanical process, can select on water scrubber, arrange epimere differential pressure indicator 113, interlude differential pressure indicator 114 and hypomere differential pressure indicator 115 respectively.This is conducive to the pressure in Real-Time Monitoring water scrubber.
In the present embodiment, water wash system also comprises the gas product charging-tank 300 being arranged on water scrubber 100 upstream, gas product charging-tank 300 is provided with air supply opening 301, and air supply opening 301 is connected with the gas product entrance 101 on water scrubber 100.Gas product charging-tank 300 is set, is conducive to the stability improving water wash system gas product, thus is conducive to the stability of water-washing process.
In practical operation, gas product charging-tank can also be provided with gas product liberation port 304, this is conducive to the safety in utilization improving gas product feeding mechanism, and the gas product simultaneously discharged can be back to MTO unit and reuse.
In the present embodiment, the inside of water scrubber 100 is provided with water-oil separating room, and water-oil separating room comprises the oily storage tank 105 and water storage tank 106 that separate with dividing plate; Wherein, oily storage tank 105 is provided with the second eluate outlet 107, and the first eluate outlet 103 is arranged on water storage tank 106; Gas product charging-tank 300 is also provided with Ethylene recov entrance 302, and Ethylene recov entrance 302 exports 107 with the second eluate on water scrubber 100 is connected.
In the water-washing process of gas product, inevitably have a small amount of olefin product and water-oil separating room is being set, be conducive to the oil in water scrubber 100 eluate and water to separate, thus be conducive to the content of the oil in reduction by first eluate and Ethylene recov.
In the present embodiment, oil storage tank 105 is also provided with the first Liquid level table 108, Ethylene recov entrance 302 and the second eluate export on the stream between 107 and are also provided with the first fluid level control valve 109, and the first Liquid level table 108 is electrically connected with the first fluid level control valve 109.Oil storage tank 105 arranges the first Liquid level table 108 of electrical connection and the first fluid level control valve 109, is conducive to controlling opening of the first fluid level control valve 109 or closed according to liquid level.
In the present embodiment, water storage tank 106 is also provided with the second Liquid level table 111, first eluate outlet 103 and MTO wash on the stream between unit and are provided with the second fluid level control valve 112, and the second Liquid level table 111 is electrically connected with the second fluid level control valve 112; And/or washings charging-tank 200 is also provided with the 3rd Liquid level table 205, stream between first eluate outlet 103 and washings charging-tank 200 is provided with the 3rd fluid level control valve the 206, three Liquid level table 205 be electrically connected with the 3rd fluid level control valve 206.
Water storage tank 106 is arranged the second Liquid level table 111 of electrical connection and the second fluid level control valve 112, be conducive to controlling opening of the second fluid level control valve 112 or closed according to liquid level, reduce error.Similarly arrange the 3rd Liquid level table 205 to be also conducive to controlling opening of the 3rd fluid level control valve 206 or closed according to liquid level with the 3rd fluid level control valve 206, reduce error.In addition, in actual mechanical process, as required, the major part in the first eluate (water of discharging in water scrubber) can be entered washings charging-tank 200 through the 3rd fluid level control valve 206, the first a small amount of eluate is delivered to MTO water wash system through the second fluid level control valve 112.
In the present embodiment, export on the stream between 203 at the water inlet 102 of water scrubber 100 and the washings of washings charging-tank 200, also be provided with washings cooler 210 and washings delivery pump 220, stream between washings cooler 210 and water inlet 102 is provided with first flow control valve 211 and first flow control table 212, and first flow control valve 211 and first flow control table 212 are electrically connected.Arrange the temperature that washings cooler 210 is conducive to the temperature of washings to be down to applicable water-washing process, washings delivery pump 220 provides power for carrying washings.Be provided with between washings cooler 210 with water inlet 102 and be electrically connected first flow control valve 211 and first flow control table 212 is conducive to reducing flow error.
In the present embodiment, gas product charging-tank 300 is also provided with and reclaims gas entrance 303, and reclaim gas entrance 303 and export 204 with the circulating air on washings charging-tank 200 and be connected.This is conducive to the gas product in washings feeding mechanism being reclaimed gas and carries out the whole process costs of recycling reduction, the gas product in washings feeding mechanism can be discharged simultaneously, be conducive to water wash system is run at stable pressure.
In the present embodiment, the circulating air on washings charging-tank 200 exports on the stream between 204 and the recovery gas entrance 303 of gas product charging-tank 300, is also provided with manually-operated gate 207.This is conducive to the switch or closed controlling manually-operated gate 207 according to actual needs.In the present embodiment, on the stream between the air supply opening 301 and the gas product entrance of water scrubber 100 of gas product charging-tank 300, be also provided with gas compressor 310 and gas product cooler 320.Being provided with of gas compressor 310 is beneficial to as gas product provides power, cooler be provided with the temperature being beneficial to and gas product being down to applicable water scrubber 100.Gas product cooler 320 or washings cooler 210 can select water cooler, and this is conducive to reducing process costs.
In the present embodiment, water wash system also comprises boiler water feedway 400, boiler water entrance 202 is connected with boiler water feedway 400, and on stream between boiler water entrance 202 and boiler water feedway 400, also be provided with the second flow control meter 401 and second control valve 402, second flow control meter 401 is electrically connected with second control valve 402.Arranging boiler water feedway 400 is conducive to for water wash system provides stable boiler water source, and the second flow control meter 401 and the second control valve 402 that arrange electrical connection are conducive to reducing flow error.
From above description, can find out, the utility model the above embodiments achieve following technique effect: use boiler water to replace MTO to purify waste water, thus root, effectively can solve use purify waste water and wash to gas product the problem easily causing butter in caustic wash tower to gather.Simultaneously in above-mentioned water wash system, washings enter after water scrubber 100 carries out water-washing process, can enter in washings charging-tank 200 and recycle, thus be conducive to the cost reducing whole washing process with the form of the first eluate.The reason of above-mentioned two aspects makes gas product after the water wash system washing that the utility model provides, and the phenomenon that a large amount of butter can not be caused after entering caustic washing system to gather, also helps the cost reducing washing process simultaneously.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. for a water wash system for methanol-to-olefins, it is characterized in that, described water wash system comprises:
Water scrubber (100), is provided with gas product entrance (101), water inlet (102), the first eluate outlet (103) and product gas outlet (104);
Washings charging-tank (200), is provided with the first eluate entrance (201), boiler water entrance (202), washings outlet (203) and circulating air outlet (204);
Described first eluate outlet (103) on described water scrubber (100) respectively with the described first eluate entrance (201) on described washings charging-tank (200), and wash unit with MTO and be connected; Described washings outlet (203) on described washings charging-tank (200) are connected with the described water inlet (102) on described water scrubber (100), and the described product gas outlet (104) on described water scrubber (100) is connected with caustic wash tower.
2. water wash system according to claim 1, it is characterized in that, also comprise the gas product charging-tank (300) being arranged on described water scrubber (100) upstream, described gas product charging-tank (300) is provided with air supply opening (301), and described air supply opening (301) is connected with the described gas product entrance (101) on described water scrubber (100).
3. water wash system according to claim 2, is characterized in that,
The inside of described water scrubber (100) is provided with water-oil separating room, and described water-oil separating room comprises the oily storage tank (105) and water storage tank (106) that separate with dividing plate; Wherein, described oily storage tank (105) is provided with the second eluate outlet (107), and described first eluate outlet (103) is arranged on described water storage tank (106);
Described gas product charging-tank (300) is also provided with Ethylene recov entrance (302), and described Ethylene recov entrance (302) exports (107) with described second eluate on described water scrubber (100) is connected.
4. water wash system according to claim 3, is characterized in that,
Described oily storage tank (105) is also provided with the first Liquid level table (108), described Ethylene recov entrance (302) and described second eluate export on the stream between (107) and are also provided with the first fluid level control valve (109), and described first Liquid level table (108) is electrically connected with described first fluid level control valve (109).
5. water wash system according to claim 4, is characterized in that,
Described water storage tank (106) is also provided with the second Liquid level table (111), described first eluate outlet (103) and described MTO wash on the stream between unit and are provided with the second fluid level control valve (112), and described second Liquid level table (111) is electrically connected with described second fluid level control valve (112); And/or
Described washings charging-tank (200) is also provided with the 3rd Liquid level table (205), stream between described first eluate outlet (103) and described washings charging-tank (200) is provided with the 3rd fluid level control valve (206), and described 3rd Liquid level table (205) is electrically connected with described 3rd fluid level control valve (206).
6. water wash system according to any one of claim 1 to 5, it is characterized in that, export on the stream between (203) at the described water inlet (102) of described water scrubber (100) and the described washings of described washings charging-tank (200), also be provided with washings cooler (210) and washings delivery pump (220), stream between described washings cooler (210) and described water inlet (102) is provided with first flow control valve (211) and first flow control table (212), and described first flow control valve (211) and described first flow control table (212) electrical connection.
7. water wash system according to claim 2, it is characterized in that, described gas product charging-tank (300) is also provided with and reclaims gas entrance (303), and described recovery gas entrance (303) exports (204) with the described circulating air on described washings charging-tank (200) is connected.
8. water wash system according to claim 7, it is characterized in that, described circulating air on described washings charging-tank (200) exports on the stream between (204) and the described recovery gas entrance (303) of described gas product charging-tank (300), is also provided with manually-operated gate (207).
9. the water wash system according to claim 7 or 8, it is characterized in that, on the stream between the described air supply opening (301) and the described gas product entrance (101) of described water scrubber (100) of described gas product charging-tank (300), be also provided with gas compressor (310) and gas product cooler (320).
10. water wash system according to claim 9, it is characterized in that, described water wash system also comprises boiler water feedway (400), described boiler water entrance (202) is connected with described boiler water feedway (400), and on stream between described boiler water entrance (202) and described boiler water feedway (400), also be provided with the second flow control meter (401) and second control valve (402), described second flow control meter (401) is electrically connected with described second control valve (402).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794238.6U CN205055708U (en) | 2015-10-14 | 2015-10-14 | A washing system for methyl alcohol system alkene |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520794238.6U CN205055708U (en) | 2015-10-14 | 2015-10-14 | A washing system for methyl alcohol system alkene |
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| CN205055708U true CN205055708U (en) | 2016-03-02 |
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| CN201520794238.6U Active CN205055708U (en) | 2015-10-14 | 2015-10-14 | A washing system for methyl alcohol system alkene |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827323A (en) * | 2021-01-20 | 2021-05-25 | 中国神华煤制油化工有限公司 | Purification system, purification method and application of methanol-to-olefin product gas |
| CN114225602A (en) * | 2021-11-03 | 2022-03-25 | 天津大沽化工股份有限公司 | Water washing system for methanol-to-olefin product gas |
-
2015
- 2015-10-14 CN CN201520794238.6U patent/CN205055708U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827323A (en) * | 2021-01-20 | 2021-05-25 | 中国神华煤制油化工有限公司 | Purification system, purification method and application of methanol-to-olefin product gas |
| CN114225602A (en) * | 2021-11-03 | 2022-03-25 | 天津大沽化工股份有限公司 | Water washing system for methanol-to-olefin product gas |
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