CN212559825U - Purifier of waste ammonia water - Google Patents
Purifier of waste ammonia water Download PDFInfo
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- CN212559825U CN212559825U CN202020856685.0U CN202020856685U CN212559825U CN 212559825 U CN212559825 U CN 212559825U CN 202020856685 U CN202020856685 U CN 202020856685U CN 212559825 U CN212559825 U CN 212559825U
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Abstract
The utility model discloses a purifier of waste ammonia water, include aqueous ammonia quenching and tempering system, distillation system and blow off the system, be connected through aqueous ammonia filling pump between aqueous ammonia quenching and tempering system and the distillation system, distillation system and blow off and be connected through rare ammonia pump between the system. The pH value of ammonia-containing wastewater is adjusted to 11.5-12.5 by using NaOH solution in an ammonia water conditioning system, then the ammonia-containing wastewater is sequentially treated by a distillation system and a stripping system to prepare concentrated ammonia water with the mass concentration of 10% -25%, the concentrated ammonia water can be used as a supplementary ammonia source for denitration and an ammonia station, alkaline purified water with the ammonia-nitrogen content of less than 15ppm and a neutralizing agent for an acidic medium, and meanwhile, the stripping system adopts the circulation stripping of inert gas to avoid waste gas generation, so that the environment-friendly benefit is good.
Description
Technical Field
The utility model discloses a purifier of waste ammonia water relates to the chemical industry field or administers the environmental protection field that contains ammonia wastewater, specifically is an ammonia-water separator and separation method that contain ammonia wastewater.
Background
Ammonia-containing wastewater in the chemical field is common, for example, a great amount of ammonia-containing wastewater is produced as a byproduct in various coal gasification systems and dry coke quenching coking processes, and the currently adopted technologies mainly focus on three types: a, packaging and discharging to a sewage treatment enterprise with treatment capacity for treatment; b, steam stripping incineration, sending the residual wastewater part to coal blending or other working sections as a neutralizing agent, and sending the rich wastewater to a sewage treatment unit for biological or chemical denitrification; and C, adding an ammonia-containing wastewater rectifying tower to prepare ammonia water with the mass concentration of 10-25% and ammonia-containing wastewater with the discharge concentration of below 200ppm, wherein the ammonia-containing wastewater is directly discharged or discharged after biochemical treatment. The class C route is the best technology for enterprises, but the current technologies have a set of commonalities: the ammonia water obtained by the tower method is low in concentration, high in operation energy consumption and high in steam consumption, the acid and alkali consumption for wastewater conditioning is high, and the treated wastewater cannot reach the standard. Typical patented technologies that have been reported in the industry are:
patent CN201910316709.5 provides a method for treating ammonia-containing wastewater, which utilizes steam as stripping gas, and has rectification and stripping sections, and the obtained concentrated ammonia water has high purity, and has the defects of large sewage discharge amount and high energy consumption.
Patent CN201720984613.2 provides an ammonia wastewater comprehensive treatment system, utilizes carbide slag as the PH regulator, and heat exchanger, filter screen etc. are easy to be blockked up, and the continuity is poor, and the system that satisfies discharge to reach standard once investment, working costs are all very high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the defect of high operation cost and energy consumption of the ammonia-containing wastewater comprehensive treatment system in the prior art, and provides a purification device of waste ammonia water, which has good removal effect on free ammonia and ammonium ions in ammonia-containing wastewater and low energy consumption; another objective of the present invention is to provide a process for treating ammonia-containing wastewater and recovering ammonia water.
In order to solve the technical problem, the utility model provides a following technical scheme:
according to the utility model discloses purifier of waste ammonia water, include: the ammonia water conditioning system is connected with the distillation system through an ammonia water filling pump, and the distillation system is connected with the stripping system through a dilute ammonia pump.
The ammonia water conditioning system comprises an ammonia water conditioning tank, an ammonia water filling pump, a NaOH storage tank for storing a neutralizing agent, a NaOH filling pump and a high-level trough, wherein the ammonia water conditioning tank is used for buffering and conditioning ammonia-containing wastewater coming from the outside; the NaOH storage tank is connected with the high-level trough through a NaOH filling pump, and the lower part of the high-level trough is connected with the ammonia water conditioning tank; ammonia-containing wastewater in the ammonia water conditioning tank enters a distillation system through an ammonia water filling pump; advantageously, the pH value of the ammonia-containing wastewater in the ammonia water conditioner is controlled to be 11.5-12.5;
the distillation system is used for a distillation tower for primary separation of ammonia-containing wastewater, and comprises a distillation tower, a reboiler, a tower top cooler, a deep cooler, a concentrated ammonia tank and a condenser; the cooling medium of the tower top cooler is from an ammonia water filling pump, the heated ammonia-containing wastewater enters a distillation tower from the tower top of the distillation tower, a reboiler is arranged at the bottom of the distillation tower, and the tower top distillate of the distillation tower sequentially passes through the tower top cooler and a deep cooler and then enters a concentrated ammonia tank;
advantageously, the mass concentration of the ammonia water in the strong ammonia tank is controlled between 10 and 25 percent.
Advantageously, the concentrated ammonia tank is controlled to a pH of not higher than 11.5 with dilute sulfur.
And after the mass fraction of ammonia in heavy components at the tower bottom of the distillation tower reaches 0.1-0.5%, the heavy components are pumped to the top of the stripping tower through a dilute ammonia pump.
Advantageously, the distillation column has only a stripping section and the top of the column employs total condensation.
Advantageously, the temperature of the bottom of the distillation tower is controlled to be 105-120 ℃, the temperature of the top of the distillation tower is controlled to be 95-103 ℃, and the temperature of the concentrated ammonia tank is controlled to be not higher than 35 ℃.
The stripping system comprises a stripping tower, a circulating pump, an ammonia absorber, an ammonia absorbing pump, an ammonia absorbing cooler, a circulating fan and a heater; the air stripping system mainly comprises an air stripping tower for deeply separating ammonia-containing wastewater, the air stripping tower adopts inert gas heated by steam, the stripping gas of the air stripping tower enters an ammonia absorber from the top of the air stripping tower, the ammonia absorber is filled with a filler, the ammonia absorber is provided with an ammonia absorber pump and an ammonia absorber cooler which can be forced to circulate, and the inert gas out of the ammonia absorber returns to the air stripping tower through a circulating fan.
Furthermore, a gas phase outlet at the top of the stripping tower is connected with a gas phase inlet of an ammonia absorber, a gas phase outlet of the ammonia absorber is connected with an inlet of a circulating fan, an outlet of the circulating fan is connected with a heater, and the heater is connected with a gas phase inlet of a tower kettle of the stripping tower.
The bottom of the ammonia absorber is connected with the inlet of an ammonia absorbing pump, and the outlet of the ammonia absorbing pump is connected with the liquid phase inlet of the ammonia absorber through an ammonia absorbing cooler.
Advantageously, the temperature of a tower kettle of the stripping tower is controlled to be 65-105 ℃, the temperature of the tower kettle of the stripping tower is controlled to be 50-65 ℃, and the temperature of the ammonia absorber is controlled to be not higher than 35 ℃;
advantageously, the absorption liquid for the ammonia absorber comes from the bottom liquid of the distillation tower.
Advantageously, the top feed to the stripping column comes from a circulation pump and a dilute ammonia pump.
Advantageously, the absorption liquid of the ammonia absorber is controlled to have a pH value not higher than 11.5 by using sulfuric acid.
Advantageously, the absorption liquid of said ammonia absorber is periodically discharged to the distillation column.
Advantageously, the purified water in the bottom of the stripping tower is periodically discharged to a sewage treatment system to be used as a neutralizer for neutralizing the acidic wastewater.
According to the utility model discloses a purifier of waste ammonia water adopts the aforesaid the device that contains ammonia wastewater treatment and retrieve aqueous ammonia handles, including following step:
step 1, injecting a NaOH solution in a NaOH storage tank into a high-level trough through a NaOH filling pump, transferring the NaOH solution in the high-level trough to an ammonia water conditioner through liquid level control, PH control, flow control and other means, and preferably transferring the NaOH solution through a liquid level control means.
Step 2, sending the ammonia-containing wastewater in the ammonia water conditioner to a tower top cooler by an ammonia water filling pump, heating the ammonia-containing wastewater to a temperature approximate to a bubble point, and then entering a distillation tower from the tower top of the distillation tower; the distillate at the top of the distillation tower is fully condensed, and the cold energy liquid flows into a strong ammonia water tank.
And 3, injecting the residual liquid in the tower kettle of the distillation tower to the top of the stripping tower through a dilute ammonia pump, and continuously transferring ammonia in the dilute ammonia water to an ammonia absorber under the action of a circulating fan.
The utility model discloses the beneficial effect who reaches is:
one, the utility model discloses when handling waste ammonia water, adopt the distillation of distillation system earlier and adopt the system of blowing off again to blow off, handle ammonia mass concentration 1% ~ 3% contain ammonia waste water, theoretical calculation ton ammonia (book pure) steam consumption 6.5 ~ 8t, contrast data has in the trade: the consumption of ton ammonia (pure) steam by a direct distillation method is 12-20 t; the consumption of ton ammonia (pure) steam is 10-15 t after the ton ammonia is sucked and blown off and rectified.
Two, the utility model discloses a blow and take off the system and adopt inert gas's circulation to blow and take off the method, no waste gas produces, and the neutralizing agent of acid medium can be regarded as to alkaline purified water, reduces environmental protection running cost, and the concentrated ammonia water after the concentration can be regarded as the supplementary ammonia source of denitration, ammonia station, and resource recycling nature is good.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. the system comprises an ammonia water conditioning tank, 11 ammonia water filling pumps, 12 NaOH storage tanks, 13 NaOH filling pumps, 14 overhead bins, 2 distillation towers, 21 reboilers, 22 overhead coolers, 23 deep coolers, 24 concentrated ammonia tanks, 25 dilute ammonia pumps, 3 stripping towers, 31 circulating pumps, 32 ammonia absorbers, 33 ammonia absorbing pumps, 34 ammonia absorbing coolers, 35 circulating fans and 36 heaters, wherein the ammonia water conditioning tank is connected with the reboiler through a pipeline; 81. purifying the water.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Example 1
As shown in fig. 1, a purification device for waste ammonia water comprises an ammonia water conditioning system, a distillation system and a stripping system, wherein the ammonia water conditioning system is connected with the distillation system through an ammonia water filling pump 11, and the distillation system is connected with the stripping system through a dilute ammonia pump 25;
the ammonia water conditioning system comprises an ammonia water conditioning tank 1, an ammonia water filling pump 11, a NaOH storage tank 12, a NaOH filling pump 13 and a high-level trough 14, wherein the ammonia water conditioning tank 1 is used for buffering and conditioning ammonia-containing wastewater 71 coming from the outside; the high-level trough 14 is used for buffering NaOH solution from the NaOH storage tank 12, the NaOH storage tank 12 is connected with the high-level trough 14 through the NaOH filling pump 13, and the lower part of the high-level trough 14 is connected with the ammonia water conditioning tank 1; the ammonia-containing wastewater in the ammonia water conditioning tank 1 enters a distillation system through an ammonia water filling pump 11.
Generally, after being treated by an ammonia water conditioning system, the pH value of ammonia-containing wastewater in an ammonia water conditioner 1 is controlled to be 11.5-12.5;
the distillation system comprises a distillation tower 2, a reboiler 21, an overhead cooler 22, a chiller 23, a concentrated ammonia tank 24 and a dilute ammonia pump 25; the reboiler 21 adopts a steam low-pressure saturated steam indirect heating method, and the temperature of a tower kettle of the distillation tower 2 is controlled to be 105-120 ℃;
the ammonia-containing wastewater from the ammonia water conditioning system enters the top of the distillation tower 2 through the top cooler 22, advantageously, the temperature of the top of the distillation tower is controlled to be 95-103 ℃, the distillate discharged from the top of the top cooler 22 is further cooled through the deep cooler 23, the condensate flows to the concentrated ammonia tank 24, and the pH value of the concentrated ammonia tank 24 is adjusted to be not higher than 11.5 through dilute sulfuric acid. The temperature of the concentrated ammonia tank 24 is controlled to be not higher than 35 ℃.
The stripping system comprises a stripping tower 3, a circulating pump 31, an ammonia absorber 32, an ammonia absorbing pump 33, an ammonia absorbing cooler 34, a circulating fan 35 and a heater 36;
the tower bottom liquid of the distillation tower 2 is sprayed to the top of the stripping tower 3 of the stripping system through a dilute ammonia pump 25,
the gas phase outlet at the top of the stripping tower 3 is connected with the gas phase inlet of the ammonia absorber 32, the gas phase outlet of the ammonia absorber 32 is connected with the inlet of the circulating fan 35, the outlet of the circulating fan 35 is connected with the heater 36, and the heater 32 is connected with the gas phase inlet at the bottom of the stripping tower 3.
Advantageously, the temperature of the tower kettle of the stripping tower is controlled to be 65-105 ℃, and the temperature of the tower kettle of the stripping tower is controlled to be 50-65 ℃.
The bottom of the ammonia absorber 32 is connected with the inlet of an ammonia absorbing pump 33, and the outlet of the ammonia absorbing pump 33 is connected with the liquid phase inlet of the ammonia absorber 32 through an ammonia absorbing cooler 34.
Advantageously, the ammonia absorber 32 is periodically replenished with dilute sulfuric acid, the pH of the liquid phase of the ammonia absorber is adjusted to not higher than 11.5, and the temperature of the liquid phase of the ammonia absorber 32 is adjusted to not higher than 35 ℃.
Further, as a system material trend description, the following are provided:
the path from the ammonia-containing wastewater entering the system to the conversion into purified water is that ammonia-containing wastewater 71 → ammonia water tempering tank 1 → ammonia water filling pump 13 → top of distillation tower 2 → packing layer of distillation tower 2 → bottom of distillation tower 2 → diluted ammonia pump 11 → top of air stripping tower 3 → packing layer of air stripping tower 3 → bottom of air stripping tower 3 → purified water 81 is discharged.
The path of the inert gas with the circulating fan as the starting point is, the outlet of the circulating fan 35 → the heater 36 → the inlet of the gas phase at the bottom of the air stripping tower 3 → the inner packing layer of the air stripping tower 3 → the outlet of the gas phase at the top of the air stripping tower 3 → the inlet of the gas phase of the ammonia absorber 32 → the packing layer of the ammonia absorber 32 → the outlet of the gas phase at the top of the ammonia absorber 32 → the inlet of the circulating fan 35.
According to the utility model discloses a purifier of waste ammonia water adopts the aforesaid the device that contains ammonia wastewater treatment and retrieve aqueous ammonia handles, including following step:
step 1, injecting a NaOH solution in a NaOH storage tank into a high-level trough through a NaOH filling pump, transferring the NaOH solution in the high-level trough to an ammonia water conditioner through liquid level control, PH control, flow control and other means, and preferably transferring the NaOH solution through a liquid level control means.
Step 2, sending the ammonia-containing wastewater in the ammonia water conditioner to a tower top cooler by an ammonia water filling pump, heating the ammonia-containing wastewater to a temperature approximate to a bubble point, and then entering a distillation tower from the tower top of the distillation tower; the distillate at the top of the distillation tower is fully condensed, and the cold energy liquid flows into a strong ammonia water tank.
And 3, injecting the residual liquid in the tower kettle of the distillation tower to the top of the stripping tower through a dilute ammonia pump, and continuously transferring ammonia in the dilute ammonia water to an ammonia absorber under the action of a circulating fan.
Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that various changes, modifications, substitutions and alterations can be made therein by those skilled in the art without departing from the scope of the present invention.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The purification device for the waste ammonia water is characterized by comprising an ammonia water conditioning system, a distillation system and a stripping system, wherein the ammonia water conditioning system is connected with the distillation system through an ammonia water filling pump, and the distillation system is connected with the stripping system through a dilute ammonia pump;
the ammonia water conditioning system comprises an ammonia water conditioning tank, an ammonia water filling pump, a NaOH storage tank, a NaOH filling pump and a high-level trough, wherein the ammonia water conditioning tank is used for buffering and conditioning ammonia-containing wastewater coming from the outside; the NaOH storage tank is connected with the high-level trough through a NaOH filling pump, and the lower part of the high-level trough is connected with the ammonia water conditioning tank; and the ammonia-containing wastewater in the ammonia water conditioning tank enters a distillation system through an ammonia water filling pump.
2. The apparatus for purifying waste ammonia water of claim 1, wherein the distillation system comprises a distillation column, a reboiler, an overhead cooler, a chiller, a concentrated ammonia tank; the heated ammonia-containing wastewater enters a distillation tower from the top of the distillation tower through a tower top cooler, a reboiler is arranged at the bottom of the distillation tower, and the distillate at the top of the distillation tower sequentially passes through the tower top cooler, a deep cooler and then enters a concentrated ammonia tank.
3. The apparatus for purifying waste ammonia water of claim 1, wherein the stripping system comprises a stripping tower, a circulation pump, an ammonia absorber, an ammonia absorbing pump, an ammonia absorbing cooler, a circulation fan and a heater;
and a gas phase outlet at the top of the stripping tower is connected with a gas phase inlet of an ammonia absorber, a gas phase outlet of the ammonia absorber is connected with an inlet of a circulating fan, an outlet of the circulating fan is connected with a heater, and the heater is connected with a gas phase inlet of a tower kettle of the stripping tower.
4. The apparatus for purifying waste aqueous ammonia according to claim 3, wherein the bottom of the ammonia absorber is connected to an inlet of an ammonia absorber pump, and an outlet of the ammonia absorber pump is connected to a liquid phase inlet of the ammonia absorber via an ammonia absorber cooler.
5. The apparatus for purifying waste ammonia water of claim 3, wherein the stripping tower uses an inert gas as a stripping medium.
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| CN202020856685.0U CN212559825U (en) | 2020-05-21 | 2020-05-21 | Purifier of waste ammonia water |
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| CN202020856685.0U CN212559825U (en) | 2020-05-21 | 2020-05-21 | Purifier of waste ammonia water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI801212B (en) * | 2022-04-21 | 2023-05-01 | 環創源科技股份有限公司 | Liquefied gas purifying system and resource recycling system for processing ammonia nitrogen-containing waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI801212B (en) * | 2022-04-21 | 2023-05-01 | 環創源科技股份有限公司 | Liquefied gas purifying system and resource recycling system for processing ammonia nitrogen-containing waste water |
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