CN204365123U - A kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process - Google Patents
A kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process Download PDFInfo
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- CN204365123U CN204365123U CN201420716485.XU CN201420716485U CN204365123U CN 204365123 U CN204365123 U CN 204365123U CN 201420716485 U CN201420716485 U CN 201420716485U CN 204365123 U CN204365123 U CN 204365123U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process, when the ammonia reclaiming process of sulphur ammonium is produced in coal gas system employing, with sulfuric acid absorbing ammonia in pickling tower; Its equipment comprises pickling tower, recycle liquid pump, circulation fluid cooler, certainty ratio blender or sulfuric acid measuring pump, concentrated sulfuric acid groove and connecting pipe; When coal gas system adopts phosphorus ammonium to wash the ammonia reclaiming process of ammonia production anhydrous ammonia, ammonia or concentrated ammonia liquor, the absorbing ammonia in pickling tower with phosphoric acid or phosphorus ammonium; Its equipment comprises pickling tower, recycle liquid pump, circulation fluid cooler and connecting pipe; Compared with prior art, the beneficial effects of the utility model are: the ammonia 1) avoided in negative pressure ammonia still process tail gas causes harmful effect to liquid-ring vacuum pump performance and operation, improve the service life of vavuum pump, reduce the maintenance of vavuum pump, effectively can improve Business Economic Benefit; 2) avoid the impact of ammonia on vavuum pump vacuum, ensure the stable operation of negative pressure ammonia evaporation system.
Description
Technical field
The utility model relates to coking chemical Product recycling technical field, particularly relates to a kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process.
Background technology
At present, the remained ammonia distil process of coking industry has malleation ammonia still process and negative pressure ammonia still process two kinds of techniques.Compared with malleation ammonia still process, negative pressure ammonia still process have employed vacuum method distillation, has operating temperature and reduces, corrosive medium reduces, technique requires to reduce to equipment material, can utilize some waste heats as thermal source to reduce the advantages such as energy consumption, more and more receive the concern of coking industry.
As shown in Figure 1, be the negative pressure ammonia still process flow process utilizing raw coke oven gas waste heat to be thermal source, the ammonia that ammonia still 6 produces, under the negative pressure state of absolute pressure 15-35KPa, after ammonia condenser 10 and ammonia cooler 11 condensing cooling, is extracted out with vavuum pump 13.Due under negative pressure state, the solubility of ammonia in water reduces greatly, and ammonia reaches vapor liquid equilibrium after condensing cooling, only has the ammonia of 50-60% to be dissolved in water, and all the other are with tail gas suction vavuum pump 13.
Negative pressure ammonia still process adopts liquid-ring vacuum pump, has exhaust capacity large, can extract be corrosive, containing the advantage such as gas of particle, but tail gas ammon amount is large, has a significant impact the performance and used life of vavuum pump.Be mainly manifested in two aspects: one is that ammonia can be water-soluble, ammonia is caused constantly to dissolve and flash distillation with the change of pressure in pump, amount of liquid in the gas flow that is drawn into and pump is constantly changed, the vacuum of system fluctuates, the fluctuation of vacuum, directly affect the ammonia still process efficiency of ammonia still, thus the up to standard of distilled ammonia wastewater is impacted.Therefore, ensure that stablizing of negative pressure ammonia still process vacuum is most important.Two is ammonia and CO
2water-soluble, the NH of generation
4hCO
3crystallization easily causes vavuum pump to block; Salt crystalloid hangs on the blade of impeller unevenly, uneven and shake when causing impeller operation; Salt crystalloid enters the valve seat lid of pump and the gap of impeller, and make gap enlargement exceed setting, the suction muffler of pump is communicated with discharge chamber, reduces pump performance.When above factor causes actual use, the maintenance of vavuum pump and replacement cycle shorten greatly.
Summary of the invention
The utility model provides a kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process, to the tail gas containing a large amount of ammonia before entering liquid-ring vacuum pump, adopt rational technique deamination, reach and make vavuum pump even running, extend the object of service life of vacuum pump and maintenance cycle, and the continuity that ammonia still process operates can be ensured.
In order to achieve the above object, the utility model realizes by the following technical solutions:
A kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process, comprise ammonia still, reboiler, gaseous effluent cooler, dephlegmator, ammonia condenser, ammonia cooler, separator, vavuum pump, distilled ammonia wastewater pump, waste water circulation pump and connecting pipe, also comprise pickling tower, described pickling tower is located in the connecting pipe before vavuum pump.
Described pickling tower bottom establishes ammonia entrance to be connected with the ammonia outlet of separator, pickling top of tower establishes offgas outlet to be connected with vacuum pump inlet, pickling tower bottom establishes circulation fluid to export, by connecting pipe successively communication loop liquid pump, circulation fluid cooler and pickling tower top circulation fluid entrance; Connecting pipe is provided with the outlet of sulphur ammonium, soft water entrance, and is parallel with certainty ratio blender or sulfuric acid measuring pump, and certainty ratio blender or sulfuric acid measuring pump connect concentrated sulfuric acid groove in addition.
Described pickling tower bottom establishes ammonia entrance to be connected with the ammonia outlet of separator, pickling top of tower establishes offgas outlet to be connected with vacuum pump inlet, pickling tower bottom establishes circulation fluid to export, by connecting pipe successively communication loop liquid pump, circulation fluid cooler and pickling tower top circulation fluid entrance, connecting pipe is provided with phosphorus ammonium pregnant liquor outlet and phosphorus ammonium barren liquor entrance.
Described pickling tower is empty spray tower, and shower nozzle along tower height longitudinal arrangement, and passes through pipeline branch road communication loop liquid main pipeline respectively; Pickling column overhead is established and is caught mist layer.
Described circulation fluid cooler is board-like, spiral plate type or shell-and-tube heat exchanger.
Compared with prior art, the beneficial effects of the utility model are:
1) ammonia avoided in negative pressure ammonia still process tail gas causes harmful effect to liquid-ring vacuum pump performance and operation, because vavuum pump cost is high, improves the service life of vavuum pump, reduces the maintenance of vavuum pump, effectively can improve Business Economic Benefit;
2) avoid the impact of ammonia on vavuum pump vacuum, ensure the stable operation of negative pressure ammonia evaporation system.
Accompanying drawing explanation
Fig. 1 is the negative pressure ammonia distillation process flow chart of thermal source with raw coke oven gas waste heat.
Fig. 2 is the utility model equipment connection schematic diagram one.
Fig. 3 is the utility model equipment connection schematic diagram two.
In figure: 1. pickling tower 2. pickling tower recycle liquid pump 3. circulation fluid cooler 4. certainty ratio blender or sulfuric acid measuring pump 5. concentrated sulfuric acid groove 6. ammonia still 7. reboiler 8. gaseous effluent cooler 9. ammonia dephlegmator 10. ammonia condenser 11. ammonia cooler 12. separator 13. vavuum pump 14. distilled ammonia wastewater pump 15. waste water circulation pump
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:
Seeing Fig. 1, is the negative pressure ammonia distillation process flow chart of thermal source with raw coke oven gas waste heat.Its operation principle utilizes raw coke oven gas waste heat for ammonia still process thermal source, distilled ammonia wastewater at the bottom of ammonia still 6 tower and the circulating thermal medium absorbing raw coke oven gas waste heat in reboiler 7 after heat exchange as ammonia still process thermal source, ammonia still 6 is in negative pressure state; Sodium hydroxide solution for decomposing solid ammonium-salt in remained ammonia is directly added in ammonia still 6, utilize vavuum pump 13 to take out the on-condensible gas after by ammonia condenser 10 and ammonia cooler 11 condensing cooling, deliver to the coal gas precooling tower of ammonia absorption plant or ammonia process oxidation sweetening device; The ammoniacal liquor that ammonia condenser 10 and the rear condensation of ammonia cooler 11 are got off, delivers to ammonia process oxidation sweetening device doctor solution system, or delivers to coal gas precooling tower.Its equipment comprises ammonia still 6, reboiler 7, gaseous effluent cooler 8, dephlegmator 9, ammonia condenser 10, ammonia cooler 11, separator 12, vavuum pump 13, distilled ammonia wastewater pump 14, waste water circulation pump 15 and connecting pipe.
At present; in domestic coke-stove gas, removing of ammonia to mainly contain sulfuric acid absorption ammonia and produces ammonium sulfate process, washes that ammonia produces concentrated ammonia liquor or ammonolysis craft, phosphorus ammonium absorbing ammonia produces several mode such as concentrated ammonia liquor, anhydrous ammonia with recovery process; the mode identical with ammonia reclaiming process is adopted to remove ammonia in negative pressure ammonia still process ammonia; do not affect the normal recovery of ammonolysis product, and be conducive to the integrated planning of gas purification flow process.Therefore, when ammonia reclaiming process adopts sulphur ammonium or phosphorus ammonium to wash ammonia, can use sulfuric acid, phosphoric acid or phosphorus ammonium absorbing ammonia in pickling tower 1 respectively, the ammonium sulfate solution or the ammonium phosphate solution that absorb ammonia send sulphur ammonium unit or phosphorus ammonium to wash ammonia unit extraction product.
Seeing Fig. 2-Fig. 3, is equipment connection schematic diagram described in the utility model.A kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process of the utility model, comprise ammonia still 6, reboiler 7, gaseous effluent cooler 8, dephlegmator 9, ammonia condenser 10, ammonia cooler 11, separator 12, vavuum pump 13, distilled ammonia wastewater pump 14, waste water circulation pump 15 and connecting pipe, also comprise pickling tower 1, described pickling tower 1 is located in the connecting pipe before vavuum pump 13.Its principle in pickling tower 1, carries out washing except ammonia with sulfuric acid, phosphoric acid or phosphorus ammonium to ammonia before vavuum pump 13.
See Fig. 2, it is equipment connection schematic diagram one described in the utility model, a kind of negative pressure ammonia still process equipment ammonia before vavuum pump 13 being carried out to deamination process of its correspondence, comprise pickling tower 1, recycle liquid pump 2, circulation fluid cooler 3, certainty ratio blender or sulfuric acid measuring pump 4, concentrated sulfuric acid groove 5 and connecting pipe, described pickling tower 1 bottom establishes ammonia entrance to be connected with the ammonia outlet of separator 12, pickling tower 1 top establishes offgas outlet to be connected with vavuum pump 13 entrance, circulation fluid is established to export bottom pickling tower 1, by connecting pipe successively communication loop liquid pump 2, circulation fluid cooler 3 and pickling tower 1 top circulation fluid entrance, connecting pipe is provided with the outlet of sulphur ammonium, soft water entrance, and is parallel with certainty ratio blender or sulfuric acid measuring pump 4, and certainty ratio blender or sulfuric acid measuring pump 4 connect concentrated sulfuric acid groove 5 in addition.
When the ammonia reclaiming process of sulphur ammonium is produced in coal gas system employing, with sulfuric acid absorbing ammonia in pickling tower 1; By acidity be 0.5 ~ 30% ammonium sulfate liquor pickling tower 1 Inner eycle spray, to reach certain sprinkle density.The sulphur ammonium concentration controlling pickling tower 1 Inner eycle liquid is 10 ~ 60%, and sulfuric acid and soft water send into pickling tower 1 continuously or intermittently through certainty ratio blender or measuring pump 4, are sent to sulphur ammonium unit continuously or off and on by the ammonium sulfate solution of generation and extract product.Because the reaction of sulfuric acid absorption ammonia is exothermic process, therefore directly take away reaction heat by tail gas, or take away reaction heat by outer cooler cooling water, to maintain the thermal balance of pickling tower 1.
Shown in Fig. 2, a kind of operation principle of ammonia before vavuum pump 13 being carried out to the negative pressure ammonia still process equipment of deamination process is: carry out gas-liquid separation from ammonia condenser 10, ammonia cooler 11 gas-liquid medium out at separator 12, isolated ammonia enters pickling tower 1 bottom by separator 12 top.Pickling tower 1 circulation fluid sprays in tower by top, and the circulation fluid absorbing ammonia is extracted out by pickling tower recycle liquid pump 2 bottom pickling tower 1, and a part is quantitatively sent to sulphur ammonium unit, and all the other are after circulation fluid cooler 3 cools, and returns the circulation of pickling tower 1 top and sprays.Sulfuric acid certainty ratio blender or measuring pump 4 are extracted out from concentrated sulfuric acid groove 5, send into pickling tower 1 continuously or intermittently.The soft water fetched by outside workshop also sends into pickling tower 1 continuously or intermittently.Except the tail gas after ammonia is extracted out from pickling tower 1 top by vavuum pump 13.
Seeing Fig. 3, is equipment connection schematic diagram two described in the utility model, and a kind of negative pressure ammonia still process equipment ammonia before vavuum pump 13 being carried out to deamination process of its correspondence, comprises pickling tower 1, recycle liquid pump 2, circulation fluid cooler 3 and connecting pipe; Described pickling tower 1 bottom establishes ammonia entrance to be connected with the ammonia outlet of separator 12, pickling tower 1 top establishes offgas outlet to be connected with vavuum pump 13 entrance, circulation fluid is established to export bottom pickling tower 1, by connecting pipe successively communication loop liquid pump 2, circulation fluid cooler 3 and pickling tower 1 top circulation fluid entrance, connecting pipe is provided with phosphorus ammonium pregnant liquor outlet and phosphorus ammonium barren liquor entrance.
When coal gas system adopts phosphorus ammonium to wash the ammonia reclaiming process of ammonia production anhydrous ammonia, ammonia or concentrated ammonia liquor, the absorbing ammonia in pickling tower 1 with phosphoric acid or phosphorus ammonium; By acidity be 10 ~ 40% phosphorus ammonium mother liquor pickling tower 1 Inner eycle spray, to reach certain sprinkle density.Control the NH of phosphorus ammonium mother liquor in pickling tower 1
3/ H
3pO
4mol ratio is 1 ~ 3: 1; The phosphorus ammonium barren liquor quantitatively washed by phosphorus ammonium after the desorb of ammonia unit adopts continuously or intermittent mode sends into pickling tower 1, continuously or be sent to phosphorus ammonium off and on by the phosphorus ammonium pregnant liquor of generation and wash the desorb of ammonia unit; The reaction of phosphoric acid or phosphorus ammonium absorbing ammonia is exothermic process, and reaction heat is taken away by tail gas or by outer cooler by cooling water.
Shown in Fig. 3, a kind of operation principle of ammonia before vavuum pump 13 being carried out to the negative pressure ammonia still process equipment of deamination process is: carry out gas-liquid separation from ammonia condenser 10, ammonia cooler 11 gas-liquid medium out at separator 12, isolated ammonia still process tail gas enters pickling tower 1 bottom by separator 12 top.Pickling tower 1 circulation fluid sprays in tower by top, the circulation fluid absorbing ammonia is extracted out by pickling tower recycle liquid pump 2 bottom pickling tower 1, part phosphorus ammonium pregnant liquor is quantitatively sent to phosphorus ammonium and washes ammonia unit, and all the other are after circulation fluid cooler 3 cools, and returns the circulation of pickling tower 1 top and sprays.The phosphorus ammonium barren liquor that phosphorus ammonium washes ammonia unit next quantitatively sends into pickling tower 1.Except the tail gas after ammonia is extracted out from pickling tower 1 top by vavuum pump 13.
In Fig. 2 or Fig. 3, pickling tower 1 is empty spray tower, and shower nozzle, along tower height longitudinal arrangement, keeps certain distance between each shower nozzle, and to ensure certain sprinkle density, each shower nozzle is by pipeline branch road communication loop liquid supervisor respectively.Pickling tower 1 tower top is established and is caught mist layer, to remove the drop carried secretly in tail gas.Circulation fluid cooler 3 is board-like, spiral plate type or shell-and-tube heat exchanger.
Claims (5)
1. one kind is carried out the negative pressure ammonia still process equipment of deamination process to ammonia before vavuum pump, comprise ammonia still, reboiler, gaseous effluent cooler, dephlegmator, ammonia condenser, ammonia cooler, separator, vavuum pump, distilled ammonia wastewater pump, waste water circulation pump and connecting pipe, it is characterized in that, also comprise pickling tower, described pickling tower is located in the connecting pipe before vavuum pump.
2. a kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process according to claim 1, it is characterized in that, described pickling tower bottom establishes ammonia entrance to be connected with the ammonia outlet of separator, pickling top of tower establishes offgas outlet to be connected with vacuum pump inlet, pickling tower bottom establishes circulation fluid to export, by connecting pipe successively communication loop liquid pump, circulation fluid cooler and pickling tower top circulation fluid entrance; Connecting pipe is provided with the outlet of sulphur ammonium, soft water entrance, and is parallel with certainty ratio blender or sulfuric acid measuring pump, and certainty ratio blender or sulfuric acid measuring pump connect concentrated sulfuric acid groove in addition.
3. a kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process according to claim 1, it is characterized in that, described pickling tower bottom establishes ammonia entrance to be connected with the ammonia outlet of separator, pickling top of tower establishes offgas outlet to be connected with vacuum pump inlet, pickling tower bottom establishes circulation fluid to export, by connecting pipe successively communication loop liquid pump, circulation fluid cooler and pickling tower top circulation fluid entrance, connecting pipe is provided with phosphorus ammonium pregnant liquor outlet and phosphorus ammonium barren liquor entrance.
4. a kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process according to Claims 2 or 3, is characterized in that, described pickling tower is empty spray tower, and shower nozzle along tower height longitudinal arrangement, and passes through pipeline branch road communication loop liquid main pipeline respectively; Pickling column overhead is established and is caught mist layer.
5. a kind of negative pressure ammonia still process equipment ammonia before vavuum pump being carried out to deamination process according to Claims 2 or 3, is characterized in that, described circulation fluid cooler is board-like, spiral plate type or shell-and-tube heat exchanger.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106006807A (en) * | 2016-08-09 | 2016-10-12 | 陕西和尊能源科技有限公司 | Low-temperature distillation system |
CN106731502A (en) * | 2016-12-29 | 2017-05-31 | 大连科汇工程技术有限公司 | The technique and phosphorus ammonium reactor of a kind of phosphorus ammonium absorption and separation ammonia in gas |
CN108726617A (en) * | 2017-11-24 | 2018-11-02 | 羿太环保科技(上海)有限公司 | A kind of processing of negative pressure ammonia nitrogen waste water and ammonia recovery unit and technique |
CN110065986A (en) * | 2019-05-23 | 2019-07-30 | 金猛 | A kind of system recycling ammonium sulfate from ammonia-containing water |
-
2014
- 2014-11-25 CN CN201420716485.XU patent/CN204365123U/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106006807A (en) * | 2016-08-09 | 2016-10-12 | 陕西和尊能源科技有限公司 | Low-temperature distillation system |
CN106731502A (en) * | 2016-12-29 | 2017-05-31 | 大连科汇工程技术有限公司 | The technique and phosphorus ammonium reactor of a kind of phosphorus ammonium absorption and separation ammonia in gas |
CN108726617A (en) * | 2017-11-24 | 2018-11-02 | 羿太环保科技(上海)有限公司 | A kind of processing of negative pressure ammonia nitrogen waste water and ammonia recovery unit and technique |
CN110065986A (en) * | 2019-05-23 | 2019-07-30 | 金猛 | A kind of system recycling ammonium sulfate from ammonia-containing water |
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TR01 | Transfer of patent right |
Effective date of registration: 20180905 Address after: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee after: ACRE Coking And Refractory (Dalian) Engineering Consulting Corp., MCC Address before: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee before: ACRE Coking and Refractory Engineering Consulting Corporation, MCC |
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