CN211847217U - Ammonia gas recycling device suitable for ammonia distillation wastewater - Google Patents
Ammonia gas recycling device suitable for ammonia distillation wastewater Download PDFInfo
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- CN211847217U CN211847217U CN201922253853.7U CN201922253853U CN211847217U CN 211847217 U CN211847217 U CN 211847217U CN 201922253853 U CN201922253853 U CN 201922253853U CN 211847217 U CN211847217 U CN 211847217U
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Abstract
The utility model discloses an ammonia recycle device suitable for ammonia still wastewater, it includes a flash distillation section of thick bamboo and jet pump, the top of a flash distillation section of thick bamboo is passed through the inlet tube and is connected with the wastewater pump of ammonia still, and the bottom is equipped with the drain pipe, be equipped with the drain valve on the drain pipe, the high-pressure gas entry of jet pump passes through the middling pressure steam pipe and is connected with the middling pressure steam source, and the induction port is connected with the blast pipe on flash distillation section of thick bamboo lateral wall upper portion, and the gas vent passes through ammonia still admission valve and ammonia still intake-tube. The utility model discloses utilize the produced negative pressure of the high-speed efflux pump of flowing through of middling pressure steam, bring ammonia etc. in the waste water into the ammonia still, reduce ammonia still waste water ammonia content, realize the recycle of ammonia. The device not only can effectively prevent residual ammonia in the waste water from corroding pipelines and equipment, but also can avoid the ammonia from diffusing to the air to cause environmental pollution and resource waste, and reduce the waste water treatment cost. In addition, the device also has the advantages of simple structure, reliable work, convenient adjustment and the like.
Description
Technical Field
The utility model relates to a device for recovering and utilizing ammonia in ammonia distillation wastewater generated by a coke oven gas purification system, which belongs to the technical field of wastewater treatment.
Background
In the coke oven gas purification system, rich liquid generated by washing the coke oven gas is sent to an ammonia distillation deacidification system, and NH in the rich liquid is evaporated by steam3、H2S、HCN、CO2And the like, and is used for producing products such as ammonium sulfate, sulfuric acid, sodium xanthate and the like. After the rich solution is treated by ammonia distillation and deacidification, the generated ammonia distillation wastewater is sent to a pretreatment system, and after being cooled, a part of the ammonia distillation wastewater is sent to a coke oven gas washing tower for washing NH in the gas3HCN, etc. One part is sent to a biochemical wastewater treatment system, and after biochemical treatment, the other part is recycled.
A small amount of NH is still carried in the ammonia distillation wastewater from the bottom of the ammonia distillation tower3、H2S、HCN、CO2If the ammonia distillation wastewater is not recycled, a certain amount of chemical product resources are wasted, and NH is generated after the ammonia distillation wastewater is sent to a pretreatment system3、H2S and the like are emitted into the air, so that the environment is polluted and the human health is damaged; during the pipeline transportation and cooling process, pipelines and equipment can be corroded; when the ammonia is sent to a gas washing tower, the ammonia washing effect can be reduced, and the treatment cost can be increased when biochemical treatment is carried out. Therefore, it is necessary to design an ammonia gas recycling device for the ammonia distillation wastewater.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ammonia recycle device suitable for evaporate ammonia waste water to the drawback of prior art to prevent to evaporate remaining ammonia in the ammonia waste water and corrode pipeline and equipment, avoid causing environmental pollution and wasting of resources.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an ammonia recycle device suitable for evaporate ammonia waste water, includes a flash drum and jet pump in the constitution, the top of a flash drum is passed through the inlet tube and is connected with the waste water pump of ammonia still, and the bottom is equipped with the drain pipe, be equipped with the drain valve on the drain pipe, the high-pressure gas entry of jet pump is connected with the middling pressure steam source through the middling pressure steam pipe, and the induction port is connected with the blast pipe on flash drum lateral wall upper portion, and the gas vent passes through ammonia still admission valve and ammonia still intake-tube connection.
The ammonia gas recycling device suitable for ammonia distillation wastewater is characterized in that the water inlet pipe is provided with the wastewater regulating valve, the side part of the flash evaporation cylinder is provided with the liquid level meter, and the signal output end of the liquid level meter is connected with the controller of the wastewater regulating valve.
The ammonia gas recycling device suitable for ammonia distillation wastewater is characterized in that a safety valve is arranged at the top of the flash evaporation cylinder.
The ammonia recycling device suitable for the ammonia distillation wastewater is characterized in that the flash evaporation cylinder is provided with a pressure gauge.
The ammonia gas recycling device suitable for ammonia distillation wastewater is characterized in that the medium-pressure steam pipe is provided with the steam valve.
The above ammonia gas recycle device suitable for evaporating ammonia waste water, the flash evaporation section of thick bamboo is the cylinder of vertical placing.
The utility model discloses utilize the produced negative pressure of the high-speed efflux pump of flowing through of middling pressure steam, bring ammonia etc. in the waste water into the ammonia still, reduce ammonia still waste water ammonia content, realize the recycle of ammonia. The device not only can effectively prevent residual ammonia in the waste water from corroding pipelines and equipment, but also can avoid the ammonia from diffusing to the air to cause environmental pollution and resource waste, and reduce the waste water treatment cost. In addition, the device also has the advantages of simple structure, reliable work, convenient adjustment and the like.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
The reference numbers in the figures are as follows: 1. waste water governing valve, 2, inlet tube, 3, relief valve, 4, blast pipe, 5, steam valve, 6, medium pressure steam pipe, 7, jet pump, 8, ammonia still intake pipe, 9, ammonia still admission valve, 10, flash drum, 11, drain pipe, 12, drain valve, 13, level gauge, 14, manometer.
Detailed Description
The utility model provides an ammonia recycle device suitable for steamed ammonia waste water, the device utilize the produced negative pressure of jet pump of flowing through, bring ammonia etc. in the waste water into the ammonia still, carry out recycle, both solved the problem that exists among the prior art, make again and change the product raw materials and can effectively utilize, can kill two birds with one stone.
Referring to fig. 1, the utility model discloses mainly include waste water governing valve 1, inlet tube 2, relief valve 3, blast pipe 4, steam valve 5, medium pressure steam pipe 6, jet pump 7, ammonia still admission valve 9, flash drum 10, drain pipe 11, drain valve 12, level gauge 13 and manometer 14.
The flash drum 10 is cylindrical, vertically arranged, 900mm in diameter, 1950 mm in height and 1.25m in volume3(ii) a The water inlet pipe 2 is arranged at the top of the flash evaporation cylinder 10, and the diameter of the pipeline is 200 mm. The ammonia distillation wastewater flowing out from the bottom of the ammonia distillation tower is sent into the flash evaporation cylinder 10 from the top of the flash evaporation cylinder 10 by a wastewater pump; phi 150 medium-pressure steam pipe 6 is connected with the high-pressure gas inlet of jet pump 7, the air suction port and the air exhaust port of jet pump 7 are respectively connected with the exhaust pipe 4 and the ammonia still air inlet pipe 8 on the upper part of the side wall of flash drum 10, the exhaust pipe 4 is phi 200 pipe, the ammonia still air inlet pipe 8 is phi 400 pipe, the ammonia gas in flash drum 10 enters the ammonia still through exhaust pipe 4, jet pump 7 and ammonia still air inlet pipe 8; a drain pipe 11 with a drain valve 12 is arranged at the lowest part of the flash evaporation cylinder 10, and the wastewater after ammonia gas recovery is sent to a pretreatment system through the drain pipe 11 and is cooled for washing coal gas or recycling after biochemical treatment; the gas in the gas inlet pipe 8 of the ammonia still is medium-pressure steam carrying ammonia gas, and the gas enters the bottom of the ammonia still and is used for ammonia distillation and deacidification; the safety valve 3 is arranged at the upper part of the flash drum 10; the output signal of the liquid level meter 13 is sent to the controller of the waste water regulating valve 1; the pressure gauge 14 is an installation of the flash evaporation cylinder 10The device is used for observing and regulating the basis of the pressure inside the flash drum 10.
The working process of the utility model is as follows: the method comprises the steps that after a rich solution of coke oven gas washing is deacidified and ammonia distilled through an deacidification tower and an ammonia distillation tower, ammonia distilled wastewater discharged from the bottom of the ammonia distillation tower enters a flash evaporation cylinder 10 from a water inlet pipe 2 at the top of the flash evaporation cylinder 10, separated ammonia gas is discharged from an exhaust pipe 4 at the upper part and taken away by medium-pressure steam entering a medium-pressure steam pipe 6, the medium-pressure steam carrying the ammonia gas enters a low-pressure (about 0.15 MPA) steam pipeline at the bottom of the ammonia distillation tower from an ammonia distillation tower air inlet pipe 8, and the two streams of steam are combined and then enter the ammonia distillation tower and the deacidification tower and are used for removing NH in the rich solution3、H2S、HCN、CO2The ammonia gas and the like in the ammonia distillation wastewater can be recycled; ammonia evaporation wastewater without ammonia gas and the like is discharged from a drain pipe 11 at the bottom of a cone of a flash evaporation cylinder 10, and is sent to a pretreatment tank by a wastewater pump, after cooling, one part of the ammonia evaporation wastewater is used for washing coke oven gas, and the other part of the ammonia evaporation wastewater is sent to biological dephenolization treatment; the output signal of the liquid level meter 13 is interlocked with the discharge amount of the ammonia distillation wastewater, the discharge amount of the wastewater is automatically regulated through the wastewater regulating valve 1, the liquid level of the flash drum 10 is kept between 30 and 50 percent, and the flash effect is improved; when the pressure of the flash evaporation cylinder 10 exceeds the standard due to reasons, the safety valve 7 arranged at the top automatically diffuses, the pressure is reduced, and the pressure in the flash evaporation cylinder 10 is kept normal.
The utility model discloses simple structure, the reliable operation, it is convenient to adjust, and the device is put into operation the back, and ammonia etc. in the waste water can effectively be retrieved and is recycled, washes the ammonia effect and is showing and improve, sends into the waste water of biological dephenolization, and the treatment cost obviously lowers, receives anticipated effect.
Claims (6)
1. The utility model provides an ammonia recycle device suitable for ammonia still waste water, characterized by includes flash drum (10) and jet pump (7) in the constitution, the top of flash drum (10) is passed through inlet tube (2) and is connected with the waste water pump of ammonia still, and the bottom is equipped with drain pipe (11), be equipped with drain valve (12) on drain pipe (11), the high-pressure gas entry of jet pump (7) is connected with the middling pressure steam source through middling pressure steam pipe (6), and the induction port is connected with blast pipe (4) on flash drum (10) lateral wall upper portion, and the gas vent is connected with ammonia still intake pipe (8) through ammonia still admission valve (9).
2. The ammonia gas recycling device suitable for ammonia distillation wastewater as claimed in claim 1, wherein the water inlet pipe (2) is provided with a wastewater regulating valve (1), the side part of the flash drum (10) is provided with a liquid level meter (13), and the signal output end of the liquid level meter (13) is connected with the controller of the wastewater regulating valve (1).
3. An ammonia gas recycling device suitable for ammonia distillation wastewater according to claim 1 or 2, characterized in that the top of the flash drum (10) is provided with a safety valve (3).
4. The ammonia gas recycling device suitable for the ammonia distillation wastewater as claimed in claim 3, wherein the flash drum (10) is provided with a pressure gauge (14).
5. The ammonia gas recycling device suitable for the ammonia distillation wastewater as claimed in claim 4, wherein the medium pressure steam pipe (6) is provided with a steam valve (5).
6. The ammonia gas recycling device suitable for the ammonia distillation wastewater as claimed in claim 5, wherein the flash drum (10) is a vertically placed cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922253853.7U CN211847217U (en) | 2019-12-16 | 2019-12-16 | Ammonia gas recycling device suitable for ammonia distillation wastewater |
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| CN201922253853.7U CN211847217U (en) | 2019-12-16 | 2019-12-16 | Ammonia gas recycling device suitable for ammonia distillation wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113086992A (en) * | 2021-03-31 | 2021-07-09 | 成渝钒钛科技有限公司 | Novel energy-saving ammonia still and use method thereof |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113086992A (en) * | 2021-03-31 | 2021-07-09 | 成渝钒钛科技有限公司 | Novel energy-saving ammonia still and use method thereof |
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