CN203411359U - Device for processing residual ammonia water of coke oven with negative pressure flash evaporation method - Google Patents

Device for processing residual ammonia water of coke oven with negative pressure flash evaporation method Download PDF

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Publication number
CN203411359U
CN203411359U CN201320464011.6U CN201320464011U CN203411359U CN 203411359 U CN203411359 U CN 203411359U CN 201320464011 U CN201320464011 U CN 201320464011U CN 203411359 U CN203411359 U CN 203411359U
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Prior art keywords
tower
outlet
coke oven
negative pressure
ammonium sulfate
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Expired - Fee Related
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CN201320464011.6U
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Chinese (zh)
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张卫东
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张卫东
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Abstract

The utility model relates to the technical field of recycling of residual ammonia water of a coke oven, and in particular to a device for processing residual ammonia water of the coke oven with a negative pressure flash evaporation method. The device is characterized in comprising a negative pressure flash evaporation tower, a acid pickling tower, a condenser, a heater, a vacuum pump and a degassing tower, wherein a gas outlet at the top of the negative pressure flash evaporation tower is communicated with a gas inlet of the acid pickling tower; a gas outlet of the acid pickling tower is connected with the condenser; a outlet at the bottom of the acid pickling tower is connected with an ammonium sulfate mother liquor tank through an automatic flowing pipeline; the ammonium sulfate mother liquor tank is respectively connected with a spray inlet and an ammonium sulfate device through a mother liquor circulating pump; a water condensing tank is connected with a bottom inlet of the heater through a condensate pump; an outlet at the top of the heater is connected with an inlet of the degassing tower; and an outlet at the bottom of the degassing tower is taken as a discharge outlet of production recycled water. Compared to the prior art, the device for processing the residual ammonia water of the coke oven has the beneficial effects of reducing high concentrated sewage amount to be processed by an ammonia stilling device and a sewage biochemical device, and creating conditions of zero discharge of sewage for a coking plant.

Description

A kind of device that adopts negative pressure flash distillation to process coke oven remained ammonia
Technical field
The utility model relates to the reuse technology field of coke oven remained ammonia, relates in particular to a kind of device that adopts negative pressure flash distillation to process coke oven remained ammonia.
Background technology
There is Pintsch process in coking coal, split product generates 600 ~ 800 ℃ of raw gas and discharged by coke oven in coking by coke oven process.The constitution water that the water that coking coal contains and coal Pintsch process produce is discharged with raw gas, so contains 300 ~ 450g/Nm in raw gas 3water vapour.Raw gas is through cyclic ammonia water spraying cooling to 80 ~ 85 ℃, and cooled raw gas dew point is 77 ~ 80 ℃ of left and right, and the cyclic ammonia water temperature of cooling raw gas is at 75 ~ 77 ℃; Raw gas and cyclic ammonia water are through gas-liquid separation, and cyclic ammonia water flow to tar ammonia tripping device, and raw gas is delivered to primary cooler
Raw gas is cooled to 30 ℃ through primary cooler and send below follow up device to carry out purifying treatment, and the required water coolant of cooling coal gas is supplied with by recirculating cooling water system.Water vapour in raw gas enters cyclic ammonia water with coal gas cooling condensation Cheng Shui; This part water yield (being referred to as remained ammonia) of increasing in cyclic ammonia water is outer to be delivered to other device and processes, and removes the detrimental impurity such as ammonia in remained ammonia, phenol and COD, and waste water is treated reaches outer row after national corresponding wastewater discharge standard.But the problem of unavoidably bringing outer pollution discharging thing total amount to increase because of efflux wastewater.Reduce and send the effective measure that remained ammonia amount is row's coking chemical waste water environmental pollution outside solving outside.At present, coke-oven plant is just striving for and is reducing efflux wastewater amount, wishes that realizing coking waste water reuse reaches zero release.
Summary of the invention
The purpose of this utility model is to provide a kind of device that adopts negative pressure flash distillation to process coke oven remained ammonia, utilize cyclic ammonia water sensible heat as the thermal source of flash vaporization, cyclic ammonia water produces steam by flash distillation, reduce the remained ammonia amount of sending outside, simultaneously flash-off steam is through pickling, condensation and the processing such as degassed, makes water of condensation finally can be used as that second stage employ water is used aborning or row outward.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of device that adopts negative pressure flash distillation to process coke oven remained ammonia, comprise vacuum flash tower, pickling tower, condenser, well heater, vacuum pump and degassing tower, the air outlet, top of vacuum flash tower communicates with the inlet mouth of pickling tower, the air outlet, top of pickling tower is connected with condenser, between the outlet at bottom of pickling tower and ammonium sulfate liquor groove, by gravity line, be connected, ammonium sulfate liquor groove is connected with ammonium sulfate device with the spray inlet of pickling tower respectively through Recycling Mother Solution pump;
The pneumatic outlet on condenser top is connected with coal gas system through vacuum pump, condenser outlet at bottom is connected with condensate draining through gravity line, condensate draining is connected with the bottom inlet of well heater through condensate pump, the top exit of well heater is connected with the import of degassing tower, the top exit of degassing tower is connected with coal gas system, and the outlet at bottom of degassing tower is as the discharge outlet of producing reuse water.
The outlet at bottom of described vacuum flash tower is connected with ammoniacal liquor medial launder through pipeline, and ammoniacal liquor medial launder bottom is connected with coke oven through cyclic ammonia water pump and pipeline.
In described vacuum flash tower, be provided with and flutter day with fog.
Described ammonium sulfate liquor groove is provided with sulfuric acid supply pipeline.
Described pickling tower top is provided with flutters mist layer.
Compared with prior art, the beneficial effects of the utility model are:
1) utilize the process of the cooling raw gas of cyclic ammonia water, make heat that cyclic ammonia water absorbs when cooling raw gas as flash distillation thermal source, by vacuum flash mode, produce flash-off steam, reduce outer row's remained ammonia amount, solve the technical problem of high strength ammonia water treatment, flash-off steam is processed by pickling, condensation and degassed Technology simultaneously, realize the water of condensation of flash-off steam as producing reuse water or arranging outward, correspondingly reduced the high-concentration sewage Liang,Wei coke-oven plant sewage zero-discharge that ammonia steaming device, sewage biochemical device process and created conditions.2) flash-off steam also can improve after temperature of saturation through heat pump pressurization, delivers to other interchanger and uses as thermal source, realizes energy-saving and cost-reducing.
Accompanying drawing explanation
Fig. 1 is the utility model example structure schematic diagram.
In figure: 1-vacuum flash tower 2-ammoniacal liquor medial launder 3-cyclic ammonia water pump 4-pickling tower 5-ammonium sulfate liquor groove 6-Recycling Mother Solution pump 7-condenser 8-condensate draining 9 condensate pump 10-vacuum pump 11-degassing tower 12 well heaters
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
See Fig. 1, it is a kind of device example structure schematic diagram that adopts negative pressure flash distillation to process coke oven remained ammonia of the utility model, comprise vacuum flash tower 1, pickling tower 4, condenser 7, well heater 12, vacuum pump 10 and degassing tower 11, the air outlet, top of vacuum flash tower 1 communicates with the inlet mouth of pickling tower 4, the air outlet, top of pickling tower 4 is connected with condenser 7, between the outlet at bottom of pickling tower 4 and ammonium sulfate liquor groove 5, by gravity line, be connected, ammonium sulfate liquor groove 5 is connected with ammonium sulfate device with the spray inlet of pickling tower 4 respectively through Recycling Mother Solution pump 6;
The pneumatic outlet on condenser 7 tops is connected with coal gas system through vacuum pump 10, condenser 7 outlet at bottoms are connected with condensate draining 8 through gravity line, condensate draining 8 is connected with the bottom inlet of well heater 12 through condensate pump 9, the top exit of well heater 12 is connected with the import of degassing tower 11, the top exit of degassing tower 11 is connected with coal gas system, and the outlet at bottom of degassing tower 11 is as the discharge outlet of producing reuse water.
The outlet at bottom of vacuum flash tower 1 is connected with ammoniacal liquor medial launder 2 through pipeline, and ammoniacal liquor medial launder 2 bottoms are connected with coke oven through cyclic ammonia water pump 3 and pipeline.In vacuum flash tower 1, be provided with and flutter day with fog.
Ammonium sulfate liquor groove 5 is provided with sulfuric acid supply pipeline.Pickling tower 4 tops are provided with flutters mist layer.
The utility model is to utilize the heat of the cooling coal oven dithio-gas absorption of cyclic ammonia water as the thermal source of flasher evaporation, cyclic ammonia water produces steam by vacuum flash tower flash cooling and becomes water of condensation to arrange through pickling, condensation outward with degassed, to reduce outer row's remained ammonia amount, its specific operation process is described below:
73~75 ℃ of cyclic ammonia waters after preorder tar ammonia tripping device is processed are delivered to vacuum flash tower 1 flash cooling to 60~65 ℃, cooled cyclic ammonia water is from flowing to ammoniacal liquor medial launder 2, and cooled cyclic ammonia water is sent the cooling raw gas of coke oven back to by cyclic ammonia water pump 3;
The venting port below on vacuum flash tower 1 top is provided with flutters mist layer.Vacuum flash tower 1 internal pressure is absolute pressure 0.02~0.025MP, and the flash-off steam that flash distillation produces is delivered to pickling tower 4, flash-off steam upwards with the ammonium sulfate liquor counter current contact of circulated sprinkling, ammonium sulfate liquor absorbs the NH in flash-off steam 3generate sulphur ammonium, ammonium sulfate liquor is by vacuum flash tower 1 underflow to ammonium sulfate liquor groove 5, and a part of ammonium sulfate liquor returns to pickling tower 4 circulated sprinklings through Recycling Mother Solution pump 6, and a part of ammonium sulfate liquor is delivered to ammonium sulfate device and extracted sulphur crystalline ammonium; Ammonium sulfate liquor groove 5 is provided with sulfuric acid supply pipeline, for controlling ammonium sulfate liquor acidity.
Pickling tower 4 tops are provided with flutters mist section, flutter the droplet of carrying secretly in collection steam, flash-off steam after deamination is discharged and through condenser 7, is cooled to water again by pickling tower 4 tops, steam enters condensate draining 8 through the gravity flow of circulating cooling water condensation, and condenser 7 tops are discharged non-condensable gases and sent coal gas system back to through vacuum pump 10;
Water of condensation in condensate draining 8 is delivered to after well heater 12 is heated to 120 ~ 130 ℃ and is entered degassing tower 11 through condensate pump 9, and the sour gas removing returns to coal gas system, and the draining at the bottom of degassing tower is the water of condensation after degassed, can be used as that technique make up water is used or row outward.

Claims (5)

1. a device that adopts negative pressure flash distillation to process coke oven remained ammonia, it is characterized in that, comprise vacuum flash tower, pickling tower, condenser, well heater, vacuum pump and degassing tower, the air outlet, top of vacuum flash tower communicates with the inlet mouth of pickling tower, the air outlet, top of pickling tower is connected with condenser, between the outlet at bottom of pickling tower and ammonium sulfate liquor groove, by gravity line, be connected, ammonium sulfate liquor groove is connected with ammonium sulfate device with the spray inlet of pickling tower respectively through Recycling Mother Solution pump;
The pneumatic outlet on condenser top is connected with coal gas system through vacuum pump, condenser outlet at bottom is connected with condensate draining through gravity line, condensate draining is connected with the bottom inlet of well heater through condensate pump, the top exit of well heater is connected with the import of degassing tower, the top exit of degassing tower is connected with coal gas system, and the outlet at bottom of degassing tower is as the discharge outlet of producing reuse water.
2. a kind of device that adopts negative pressure flash distillation to process coke oven remained ammonia according to claim 1, it is characterized in that, the outlet at bottom of described vacuum flash tower is connected with ammoniacal liquor medial launder through pipeline, and ammoniacal liquor medial launder bottom is connected with coke oven through cyclic ammonia water pump and pipeline.
3. a kind of device that adopts negative pressure flash distillation to process coke oven remained ammonia according to claim 1, is characterized in that, in described vacuum flash tower, is provided with and flutters day with fog.
4. a kind of device that adopts negative pressure flash distillation to process coke oven remained ammonia according to claim 1, is characterized in that, described ammonium sulfate liquor groove is provided with sulfuric acid supply pipeline.
5. a kind of device that adopts negative pressure flash distillation to process coke oven remained ammonia according to claim 1, is characterized in that, described pickling tower top is provided with flutters mist layer.
CN201320464011.6U 2013-07-31 2013-07-31 Device for processing residual ammonia water of coke oven with negative pressure flash evaporation method Expired - Fee Related CN203411359U (en)

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CN201320464011.6U CN203411359U (en) 2013-07-31 2013-07-31 Device for processing residual ammonia water of coke oven with negative pressure flash evaporation method

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Application Number Priority Date Filing Date Title
CN201320464011.6U CN203411359U (en) 2013-07-31 2013-07-31 Device for processing residual ammonia water of coke oven with negative pressure flash evaporation method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103833093A (en) * 2014-03-26 2014-06-04 济钢集团有限公司 Energy-saving and environment-friendly device and technology for producing concentrated ammonia water
CN104437055A (en) * 2014-11-25 2015-03-25 中冶焦耐工程技术有限公司 Negative-pressure ammonia distillation process and equipment for deaminizing ammonia before vacuum pump
CN104986816A (en) * 2015-02-16 2015-10-21 吴大川 Process and apparatus for carrying out wastewater desorption and falling film evaporation on coking sewage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103833093A (en) * 2014-03-26 2014-06-04 济钢集团有限公司 Energy-saving and environment-friendly device and technology for producing concentrated ammonia water
CN103833093B (en) * 2014-03-26 2015-03-18 济钢集团有限公司 Energy-saving and environment-friendly device and technology for producing concentrated ammonia water
CN104437055A (en) * 2014-11-25 2015-03-25 中冶焦耐工程技术有限公司 Negative-pressure ammonia distillation process and equipment for deaminizing ammonia before vacuum pump
CN104986816A (en) * 2015-02-16 2015-10-21 吴大川 Process and apparatus for carrying out wastewater desorption and falling film evaporation on coking sewage

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140129

Termination date: 20190731

CF01 Termination of patent right due to non-payment of annual fee