CN206408037U - A kind of coal chemical industry buck flash distillation process system for reducing ammonia accumulation - Google Patents
A kind of coal chemical industry buck flash distillation process system for reducing ammonia accumulation Download PDFInfo
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- CN206408037U CN206408037U CN201620689045.9U CN201620689045U CN206408037U CN 206408037 U CN206408037 U CN 206408037U CN 201620689045 U CN201620689045 U CN 201620689045U CN 206408037 U CN206408037 U CN 206408037U
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Abstract
The utility model discloses a kind of coal chemical industry buck flash distillation process system for reducing ammonia accumulation, the coal chemical industry buck flash distillation process system of the reduction ammonia accumulation includes：Middle pressure flash column, low pressure flash chamber, vacuum flasher, defecator, ash water tank, oxygen-eliminating device, mortar-trough, vacuum flashing evaporator overhead condenser, vacuum knockout drum, rectifying column, waste heat boiler, middle pressure flash distillation gas condenser, middle pressure flash separation tank, acid Gas Cooler, rich ammonia condenser, rich ammonia condensing knockout drum；It is described reduce ammonia accumulation coal chemical industry buck flash distillation process system can effectively solve too high ammonia content in existing ash water system, energy waste, environmental pollution and it is cumbersome the problem of.
Description
Technical field
The utility model is related to the grey water-treatment technology field of coal chemical industry, more particularly to a kind of coal chemical industry for reducing ammonia accumulation
Buck flash distillation process system.
Background technology
At present, representative entrained flow bed gasification technology includes using water-coal-slurry for the Texaco gasifier of raw material and adopted
With the GSP gasification furnaces and space flight stove that dried coal powder is raw material, all things considered, both techniques all there is safe and stable, long period to transport
The characteristics of row, but it is too high to be due to that ash water system has an ammonia content, a large amount of ammonia circulative accumulation in systems, energy utilization is unreasonable
The problem of need further solve.
Coal-water slurry gasification is a kind of flow that domestic coal gasification is generally used in recent years, and its grey water treatment system is as schemed
Shown in 1.Gasification workshop section carbon washes the HTHP Heisui River that tower and gasification furnace are produced, and flash column 1, middle pressure are pressed in entering by choke valve
After the water outlet heat exchange that the top flashed vapour of flash column 1 passes through grey water- to-water heat exchanger 11 and oxygen-eliminating device 6, flash separation tank is pressed in
10, the gas phase of the middle separation of pressure flash separation tank 10 is sent to C0 conversion sections, and liquid phase enters oxygen-eliminating device 6, the middle pressure bottom liquid of flash column 1
Mutually enter low pressure flash chamber 2；The top flashed vapour of low pressure flash chamber 2 enter oxygen-eliminating device 6, the lower liquid of low pressure flash chamber 2 with
Heisui River from pulp water pump and gasification furnace driving and parking enters vacuum flasher 3 together；The upper gaseous phase port of export of vacuum flasher 3
The entrance point of vacuum knockout drum 9, the top gas of vacuum knockout drum 9 are connected to by vacuum flashing evaporator overhead condenser 8
The phase port of export connects vavuum pump, the lower liquid phase port of export of the vacuum knockout drum 9 connection entrance point of oxygen-eliminating device 6, vacuum flasher 3
The lower liquid phase port of export be connected to the entrance point of defecator 4, the top clarified solution port of export of the defecator 4 is connected to buck
The entrance point of groove 5, defecator bottom mortar port of export connection mortar-trough 7；The described bottom mortar outlet connection mortar of mortar-trough 7
Dehydration treatment equipment；The port of export connection sewage disposal system and oxygen-eliminating device 6 of the ash water tank 5；Middle pressure flash separation tank 10
Bottom liquid, the top flashed vapour of low pressure flash chamber 2, the bottom liquid phases of vacuum knockout drum 9, the water outlet of ash water tank 5 and low pressure are dodged
Steam is sent to the buck in deoxygenation groove 6, deoxygenation groove and enters centrifugal pump after bottom line and dispersant, through ash after pressurization
Degassing chemical industry section scrubbing tower after water- to-water heat exchanger 11 is heated.
The coal-water slurry gasification has the following disadvantages：
All largely contain ammonia, middle pressure flash column in middle pressure flash column 1, low pressure flash chamber 2, the flashed vapour of vacuum flasher 3
1st, after the flashed vapour of vacuum flasher 3 is condensed, then after gas-liquid separation, liquid enters deoxygenation groove 6, low pressure flash chamber 2 after separation
Flashed vapour be directly entered deoxygenation groove.Necessarily bring substantial amounts of ammonia into deoxygenation groove 6, the buck circulating and recovering of deoxygenation groove 6 to scrubbing tower,
Cause ammonia and constantly circulated in ash water system and added up, cause ammonia density in ash water system high, not only increase fresh water
Magnitude of recruitment, and increase subsequent biochemical processing system intractability and expense.
It is desirable to have a kind of coal chemical industry buck flash distillation process system for reducing ammonia accumulation, the coalification of the reduction ammonia accumulation
Work buck flash distillation process system can effectively solve too high ammonia content in existing ash water system, energy waste, environmental pollution and
Cumbersome the problem of.
Utility model content
The purpose of this utility model is to provide a kind of coal chemical industry buck flash distillation process system for reducing ammonia accumulation to overcome
The above-mentioned problems in the prior art.
To achieve the above object, a kind of coal chemical industry buck flash distillation process for reducing ammonia accumulation of the utility model offer is
System, the system of the coal chemical industry buck flash distillation process for reducing ammonia accumulation includes：Middle pressure flash column, low pressure flash chamber, vacuum are dodged
It is steaming pot, defecator, ash water tank, oxygen-eliminating device, mortar-trough, vacuum flashing evaporator overhead condenser, vacuum knockout drum, rectifying column, useless
Heat boiler, middle pressure flash distillation gas condenser, middle pressure flash separation tank, acid Gas Cooler, rich ammonia condenser, rich ammonia condensing separation
Tank；The upper gaseous phase port of export of medium pressure flash column is connected by pipeline with the entrance point of the waste heat boiler, the used heat
The port of export of boiler carries out gas-liquid separation, medium pressure through medium pressure flash distillation gas condenser connection medium pressure flash separation tank
Flash separation tank top outlet side connects the bottom of the rectifying column, the lower liquid phase port of export warp of medium pressure flash separation tank
Pump connects the top of the rectifying column；The lower liquid phase port of export of medium pressure flash column is connected to entering for the low pressure flash chamber
Mouth end；The upper gaseous phase port of export of the low pressure flash chamber connects the bottom of the rectifying column；The bottom of the low pressure flash chamber
Liquid-phase outlet end is connected to the entrance point of the vacuum flasher；The rectifier outlet side is connected through acid Gas Cooler
To sulfur recovery unit, the entrance point of the middle part side line outlet connection rich ammonia condenser of the rectifying column, through the rich ammonia
Gas condenser is connected to the rich ammonia condensing knockout drum, and the upper gas of the rich ammonia condensing knockout drum does desulfurizing agent, institute
The bottom liquid outlet end for stating rich ammonia condensing knockout drum is connected to the rectifying column as backflow；The bottom liquid phases of the rectifying column
The port of export connects the entrance point of the oxygen-eliminating device；The upper gaseous phase port of export of the vacuum flasher passes through the vacuum flashing top
Portion's condenser is connected to the entrance point of the vacuum knockout drum, and the upper gaseous phase port of export of the vacuum knockout drum connects
Vavuum pump is connect, the lower liquid phase port of export of the vacuum knockout drum connects the entrance point of the oxygen-eliminating device, and the vacuum is dodged
The lower liquid phase port of export of steaming pot is connected to the entrance point of the defecator, the top clarified solution port of export connection of the defecator
To the entrance point of the ash water tank, the defecator bottom mortar port of export connects the mortar-trough；The bottom of the mortar-trough
The mortar port of export connects mortar dehydration treatment equipment；The port of export connection sewage disposal system of the ash water tank and the deoxygenation
Device, the liquid-phase outlet end of the oxygen-eliminating device connects scrubbing tower through high-pressure pump.
The system that the utility model also provides the coal chemical industry buck flash distillation process of another reduction ammonia accumulation, it is described another
Reducing the system of the coal chemical industry buck flash distillation process of ammonia accumulation includes：It is high pressure flash tower, middle pressure flash column, low pressure flash chamber, true
Empty flash tank, defecator, ash water tank, oxygen-eliminating device, mortar-trough, vacuum flashing evaporator overhead condenser, vacuum knockout drum, rectifying
Tower, waste heat boiler, high pressure flash gas condenser, high pressure flash knockout drum, acid Gas Cooler, rich ammonia condenser, rich ammonia are cold
Solidifying knockout drum；The upper gaseous phase port of export of the high pressure flash tower connects the entrance point of the waste heat boiler, the waste heat boiler
The port of export connect the high pressure flash knockout drum through the high pressure flash gas condenser and carry out gas-liquid separation, the high pressure flash
The top outlet side of knockout drum connects the bottom of the rectifying column, and the lower liquid phase port of export of the high pressure flash knockout drum is through pump
Into the top of the rectifying column；The lower liquid phase port of export of described high pressure flash tower is connected to entering for medium pressure flash column
Mouth end；The upper gaseous phase port of export of medium pressure flash column enters the bottom of the rectifying column；The bottom of medium pressure flash column
Liquid-phase outlet end is connected to the entrance point of the low pressure flash chamber；The upper gaseous phase port of export connection of the low pressure flash chamber is described
The bottom of rectifying column；The lower liquid phase port of export of the low pressure flash chamber is connected to the entrance point of the vacuum flasher；It is described
Rectifier exhaust outlets end is connected to side line outlet connection in the middle part of sulfur recovery unit, the rectifying column through acid Gas Cooler
The entrance point of the rich ammonia condenser, the rich ammonia condensing knockout drum, the rich ammonia are connected to through the rich ammonia condenser
Condensation separation tank upper gas does desulfurizing agent, and bottom liquid backflow end is connected to the rectifying column as backflow；The rectifying
The bottom liquid phases port of export of tower connects the entrance point of the oxygen-eliminating device；The upper gaseous phase port of export of the vacuum flasher passes through institute
State vacuum flashing evaporator overhead condenser, be connected to the entrance point of the vacuum knockout drum, the vacuum knockout drum it is upper
Portion gaseous phase outlet end connects vavuum pump, and the lower liquid phase port of export of the vacuum knockout drum connects the import of the oxygen-eliminating device
End, the lower liquid phase port of export of the vacuum flasher is connected to the entrance point of the defecator, and the top of the defecator is clear
Purified liquor outlet end is connected to the entrance point of the ash water tank, and the bottom mortar port of export of the defecator connects the mortar-trough；
The bottom mortar outlet connection mortar dehydration treatment equipment of the mortar-trough；The port of export connection sewage disposal system of the ash water tank
System and the oxygen-eliminating device, the liquid-phase outlet end of the oxygen-eliminating device is connected to scrubbing tower through high-pressure pump.
Preferably, the deoxygenation groove is atmospheric pressure device, and water temperature is 109 DEG C, and scrubbing tower is directly entered by high-pressure pump.
Preferably, the deoxygenation groove is equipment with pressure, and temperature is 145 DEG C, and scrubbing tower is directly entered by high-pressure pump.
Preferably, the flashed vapour that medium pressure flash column comes out heats the rectifying column kettle liquid by reboiler, after condensation
Enter from the rectifier, the kettle liquid for being heated gasification enters the bottom of the rectifying column as steam source of the gas.
Preferably, the flashed vapour that the high pressure flash tower comes out heats the rectifying column kettle liquid by reboiler, after condensation
Enter from the rectifier, the kettle liquid for being heated gasification enters the bottom of the rectifying column as steam source of the gas.
The utility model is provided in a kind of coal chemical industry buck flash distillation process system for reducing ammonia accumulation, the utility model
The flash distillation of high pressure flash tower by entering rectifying column after a series of energy recovery units, middle pressure flash column and low pressure flash chamber it is upper
Portion's flashed vapour is directly entered rectifying column, by the NH in flashed vapour3、H2S、CO、CO2, the collection distinguished of the gas such as COS, concentrate
The effective ammonia that have collected in ash water system, the ammoniacal liquor of collection is supplemented as the weak aqua ammonia of desulfurization；The H of the collection on top2S、CO、
CO2, COS go sulfur recovery, the problem of solving equipment and pipeline scale, bottom obtains the relatively low liquid of ammonia content, is back to deoxygenation
Groove, the concentration of ash water system ammonia reduces 40%~50%, will save the consumption of fresh water, and it is difficult to alleviate subsequent biochemical processing
Degree.The utility model realizes the high ammonia nitrogen of coalification Wastewater Concentrated, saves energy consumption, and it is negative to be effectively reduced subsequent biochemical processing
Lotus, realizes discharged wastewater met the national standard, and the coal chemical industry buck flash distillation process system of the utility model reduction ammonia accumulation is fully reclaimed
Valuable ammonia resource, it is to avoid secondary pollution.
Brief description of the drawings
Fig. 1 is the grey water treatment technology schematic diagram of traditional coal gasification.
Fig. 2 is the process flow diagram of the three stages of flashing for the coal chemical industry buck flash distillation process system for reducing ammonia accumulation.
Fig. 3 is the process flow diagram of the level Four flash distillation for the coal chemical industry buck flash distillation process system for reducing ammonia accumulation.
Embodiment
To make the purpose, technical scheme and advantage of the utility model implementation clearer, below in conjunction with the utility model
Accompanying drawing in embodiment, the technical scheme in the utility model embodiment is further described in more detail.In the accompanying drawings, from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Described reality
It is a part of embodiment of the utility model to apply example, rather than whole embodiments.The embodiment described below with reference to accompanying drawing
It is exemplary, it is intended to for explaining the utility model, and it is not intended that to limitation of the present utility model.It is new based on this practicality
Embodiment in type, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of the utility model protection.Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, is for only for ease of description the utility model and simplifies description, rather than indicate or imply and be signified
Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this practicality
The limitation of novel protected scope.
In the broad embodiment of the utility model one, the system for reducing the coal chemical industry buck flash distillation process of ammonia accumulation：Middle pressure
Flash column, low pressure flash chamber, vacuum flasher, defecator, ash water tank, oxygen-eliminating device, mortar-trough, vacuum flashing evaporator overhead condenser,
Vacuum knockout drum, rectifying column, waste heat boiler, middle pressure flash distillation gas condenser, middle pressure flash separation tank, rich ammonia condenser,
Rich ammonia condensing knockout drum；The upper gaseous phase port of export of medium pressure flash column connects the entrance point of the waste heat boiler, the used heat
The port of export of boiler carries out gas-liquid separation, medium pressure through medium pressure flash distillation gas condenser connection medium pressure flash separation tank
Flash separation tank top outlet side connects the bottom of the rectifying column, the lower liquid phase port of export warp of medium pressure flash separation tank
Pump connects the top of the rectifying column；The lower liquid phase port of export of medium pressure flash column is connected to entering for the low pressure flash chamber
Mouth end；The upper gaseous phase port of export of the low pressure flash chamber connects the bottom of the rectifying column；The bottom of the low pressure flash chamber
Liquid-phase outlet end is connected to the entrance point of the vacuum flasher；The rectifier outlet side connects sulfur recovery unit, institute
The entrance point of the middle part side line outlet connection rich ammonia condenser of rectifying column is stated, through being connected to for the rich ammonia condenser
The rich ammonia condensing knockout drum, the upper gas of the rich ammonia condensing knockout drum does desulfurizing agent, the rich ammonia condensing knockout drum
Bottom liquid outlet end be connected to the rectifying column as backflow；Removed described in the bottom liquid phases port of export connection of the rectifying column
The entrance point of oxygen device；The upper gaseous phase port of export of the vacuum flasher is connected to institute by the vacuum flashing evaporator overhead condenser
The entrance point of vacuum knockout drum is stated, the upper gaseous phase port of export connection vavuum pump of the vacuum knockout drum is described true
The lower liquid phase port of export of air fluid knockout drum connects the entrance point of the oxygen-eliminating device, and the lower liquid phase of the vacuum flasher goes out
Mouth end is connected to the entrance point of the defecator, and the top clarified solution port of export of the defecator is connected to entering for the ash water tank
Mouth end, the defecator bottom mortar port of export connects the mortar-trough；The bottom mortar port of export connection ash of the mortar-trough
Starch dehydration treatment equipment；The port of export connection sewage disposal system of the ash water tank and the oxygen-eliminating device, the liquid of the oxygen-eliminating device
The phase port of export connects scrubbing tower through high-pressure pump.
As shown in Fig. 2 reducing the system of the coal chemical industry buck flash distillation process of ammonia accumulation includes：Middle pressure flash column 1, low pressure are dodged
Steaming pot 2, vacuum flasher 3, defecator 4, ash water tank 5, oxygen-eliminating device 6, mortar-trough 7, vacuum flashing evaporator overhead condenser 8, vacuum gas
Liquid knockout drum 9, rectifying column 10, waste heat boiler 11, middle pressure flash distillation gas condenser 12, middle pressure flash separation tank 13, acid air cooling
Device 14, rich ammonia condenser 15, rich ammonia condensing knockout drum 16.
The upper gaseous phase port of export of described middle pressure flash column 1 connects the entrance point of waste heat boiler 11, waste heat boiler by pipeline
The flashed vapour of the port of export of stove 11 pressed in flash distillation gas condenser 12 be desalted water section condensation after, in press flash separation tank
13 gas-liquid separations, the middle top outlet side of pressure flash separation tank 13 enters the bottom of rectifying column 10, the middle bottom of pressure flash separation tank 13
Liquid phase enters the top of rectifying column 10 through pump；The lower liquid phase port of export of described middle pressure flash column 1 is connected to low pressure flash chamber 2
Entrance point；The upper gaseous phase outlet of described low pressure flash chamber 2 enters the bottom of rectifying column 10；Described low pressure flash chamber 2
The Heisui River of the lower liquid phase port of export is together connected to entering for vacuum flasher 3 with the Heisui River from pulp water pump and gasification furnace driving and parking
Mouth end；The described top outlet of rectifying column 10 is connected in sulfur recovery unit, described rectifying column 10 through acid Gas Cooler 14
The entrance point of the rich ammonia condenser 16 of portion's side line outlet connection, rich ammonia condensing knockout drum is connected to through rich ammonia condenser 15
16, the rich upper gas of ammonia condensing knockout drum 16 does desulfurizing agent, and bottom liquid is back to rectifying column 10, is used as backflow；Described
The bottom liquid phases port of export of rectifying column 10 connects the entrance point of oxygen-eliminating device 6；The upper gaseous phase port of export of vacuum flasher 3 passes through vacuum
Flash distillation evaporator overhead condenser 8 is connected to the entrance point of vacuum knockout drum 9, the upper gaseous phase port of export of vacuum knockout drum 9
Connect vavuum pump, the lower liquid phase port of export of the vacuum knockout drum 9 connection entrance point of oxygen-eliminating device 6, the bottom liquid of vacuum flasher 3
The phase port of export is connected to the entrance point of defecator 4, and the top clarified solution port of export of the defecator 4 is connected to entering for ash water tank 5
Mouth end, the bottom mortar port of export connection mortar-trough 7 of defecator 4；At the described bottom mortar outlet connection mortar dehydration of mortar-trough 7
Manage device；The port of export connection sewage disposal system and oxygen-eliminating device 6 of the ash water tank 5, the liquid-phase outlet end warp of the oxygen-eliminating device 6
High-pressure pump enters scrubbing tower.
The coal chemical industry buck flash distillation process system of ammonia accumulation is reduced, is comprised the following steps：
1) coal gasified black water sequentially enters middle pressure flash column, low pressure flash chamber and vacuum flasher and carries out flash distillation process.
2) the coal gasification gasification Heisui River after step (1) flash distillation process, enters defecator and removes solid particle, realize solid-liquid point
From top water outlet, which enters after deoxygenation groove deoxygenation to return gasification system, to be recycled.
3) flashed vapour that pressure flash column is flashed off in contains NH3、H2S、CO、CO2With the gas such as COS, waste heat boiler is utilized to return
Receive after heat, partial condensation presses flash separation tank gas-liquid separation in entering, and top outlet enters rectifier bottoms, and bottom liquid enters
Enter rectifier.
4) flashed vapour that flashes off of low pressure flash chamber contains NH3、H2S、CO、CO2, the gas such as COS, be directly entered rectifying column
Bottom is used as rectifying thermal source.
The qualified ammonia of side take-off, wherein H in the middle part of rectifying column2S content ＜ 10PPM, are used as project assorted boiler desulfurization
The supplement of weak aqua ammonia；Collected overhead H2S、CO、CO2, the sour gas such as COS, remove sulfur recovery system；Deoxygenation is returned in the qualified water outlet in bottom
Groove is used as supplement water.
High temperature (200~224 DEG C) high pressure (4.0MPaG) for washing tower and gasification furnace from coal gasification carbon contains the black of solid (2%)
Pressure flash column 1 carries out first order pressure release flash distillation during water enters, and flashing pressure is that 0.5~0.8MPaG, temperature are 159~175 DEG C,
Entrainment of substantial amounts of NH in flashed vapour3And H2S、CO、CO2, the gas such as COS, flashed vapour is introduced into waste heat boiler 11 and reclaims heat,
The saturated vapor that waste heat boiler 11 is produced is incorporated to the saturated vapor pipeline of factory, is pressed in entering by the flashed vapour of waste heat boiler 11
The partial condensation of gas condenser 12 is flashed, presses flash separation tank 13 to carry out gas-liquid separation in, the liquid isolated is defeated by pump
Enter the top of rectifying column 10, gas is used as thermal source into the bottom of rectifying column 10；
The lower liquid phase of middle pressure flash column 1 enters low pressure flash chamber 2, carries out second level pressure release flash distillation, flashing pressure is
0.3MPaG, temperature are 143 DEG C, entrainment of substantial amounts of NH in flashed vapour3、H2S、CO、CO2, the gas such as COS, flashed vapour enters essence
The bottom of tower 10 is evaporated as thermal source；Operating pressure is 10~15% qualified dense ammonia of extraction in the middle part of 0.2MPaG, rectifying column in rectifying column
Water, wherein H2S content ＜ 10PPM, are used as the supplement of project assorted boiler desulfurization weak aqua ammonia；Collected overhead H2S、CO、CO2、COS
Deng sour gas, sulfur recovery system is removed, the qualified water outlet in bottom returns deoxygenation groove as supplement water.
The lower liquid phase of low pressure flash chamber 2 and the Heisui River of slag pool pump and gasification furnace driving and parking together enter vacuum flasher 3；
Carry out third level pressure release flash distillation, flashing pressure is that -0.08~-0.05MPaG, temperature are 60~80 DEG C, vacuum flasher 3 it is upper
Portion's gas phase is through the partial condensation of vacuum flashing evaporator overhead condenser 8, into the gas-liquid separation of vacuum knockout drum 9, vacuum gas-liquid separation
The upper gaseous phase port of export connection vavuum pump of tank 9, the lower liquid phase of vacuum knockout drum 9 enters oxygen-eliminating device 6, vacuum flasher 3
(2% Heisui River enters defecator 4, and Heisui River is acted in defecator 4 in additional flocculating agents, realizes solid-liquor separation, is clarified containing solid for bottom
The top clarified solution of groove 4 enters ash water tank 5, and the bottom mortar of defecator 4 enters mortar-trough 7；The bottom mortar outlet connection ash of mortar-trough 7
Starch dehydration treatment equipment；The sewage disposal system that is partly into of ash water tank 5 is come with oxygen-eliminating device 6, the water of deoxygenation groove 6 is partly into
From ash water tank 5, vacuum knockout drum 9 and rectifying column 10, except deoxidation under the heat effect of low-pressure steam, directly enter through high-pressure pump
Enter scrubbing tower as washings.
As shown in figure 3, high pressure flash tower 1, middle pressure flash column 2, low pressure flash chamber 3, vacuum flasher 4, defecator 5, ash
Tank 6, oxygen-eliminating device 17, mortar-trough 7, vacuum flashing evaporator overhead condenser 8, vacuum knockout drum 9, rectifying column 10, waste heat boiler
11st, high pressure flash gas condenser 12, high pressure flash knockout drum 13, acid Gas Cooler 14, rich ammonia condenser 15, rich ammonia condensing
Knockout drum 16；It is characterized in that：The upper gaseous phase port of export of described high pressure flash tower 1 connects the entrance point of waste heat boiler 11, gives up
After the flashed vapour of the port of export of heat boiler 11 is desalted water section condensation through high pressure flash gas condenser 12, into high pressure flash point
From the gas-liquid separation of tank 13, the top outlet side of high pressure flash knockout drum 13 enters the bottom of rectifying column 10, high pressure flash knockout drum 13
Lower liquid phase enters the top of rectifying column 10 through pump；The lower liquid phase port of export of described high pressure flash tower 1 is connected to middle pressure flash distillation
The entrance point of tower 2；The upper gaseous phase outlet of described middle pressure flash column 2 enters the bottom of rectifying column 10；Described middle pressure flash distillation
The lower liquid phase port of export of tower 2 is connected to the entrance point of low flash tank 3；The upper gaseous phase outlet of described low pressure flash chamber 3 enters
Enter the bottom of rectifying column 10；The Heisui River of the lower liquid phase port of export of described low pressure flash chamber 3 is with coming from pulp water pump and gasification furnace
The Heisui River of driving and parking is together connected to the entrance point of vacuum flasher 4；The described top outlet of rectifying column 10 is through acid air cooling
Device 14 is connected to sulfur recovery unit, and the described middle part side line outlet of rectifying column 10 connects the entrance point of rich ammonia condenser 15, warp
Rich ammonia condenser 15 is connected to rich ammonia condensing knockout drum 16, and the rich upper gas of ammonia condensing knockout drum 16 does desulfurizing agent, bottom
Portion's liquid is back to rectifying column 10, is used as backflow；The described bottom liquid phases port of export of rectifying column 10 connects the import of oxygen-eliminating device 17
End；The upper gaseous phase port of export of vacuum flasher 4 is connected to vacuum knockout drum 9 by vacuum flashing evaporator overhead condenser 8
Entrance point, the upper gaseous phase port of export connection vavuum pump of vacuum knockout drum 9, the outlet of the lower liquid phase of vacuum knockout drum 9
The end connection entrance point of oxygen-eliminating device 17, the lower liquid phase port of export of vacuum flasher 4 is connected to the entrance point of defecator 5, described clear
The top clarified solution port of export of clear groove 5 is connected to the entrance point of ash water tank 6, the bottom mortar port of export connection mortar-trough of defecator 5
7；The described bottom mortar outlet connection mortar dehydration treatment equipment of mortar-trough 7；At the port of export connection sewage of the ash water tank 6
Reason system and oxygen-eliminating device 17, the liquid-phase outlet end of the oxygen-eliminating device 17 enter scrubbing tower through high-pressure pump.
High temperature (250~260 DEG C) high pressure (8.4MPaG) for washing tower and gasification furnace from coal gasification carbon contains the black of solid (2%)
Water enters high pressure flash tower 1 and carries out first order pressure release flash distillation, and flashing pressure is that 3.0~3.4MPaG, temperature are 240~250 DEG C,
Entrainment of substantial amounts of NH in flashed vapour3And H2S、CO、CO2, the gas such as COS, flashed vapour is introduced into waste heat boiler 11 and reclaims heat,
The saturated vapor that waste heat boiler 11 is produced is incorporated to the saturated vapor pipeline of factory, and the flashed vapour by waste heat boiler 11 enters high pressure
The partial condensation of gas condenser 12 is flashed, gas-liquid separation is carried out into high pressure flash knockout drum 13, the liquid isolated is defeated by pump
Enter the top of rectifying column 10, gas is used as thermal source into the bottom of rectifying column 10；
The lower liquid phase of high pressure flash tower 1 presses flash column 2 in entering, and carries out second level pressure release flash distillation, flashing pressure is 0.5
~0.8MPaG, temperature are 159~175 DEG C, entrainment of substantial amounts of NH in flashed vapour3And H2S、CO、CO2, the gas such as COS, flash distillation
Gas is used as thermal source into the bottom of rectifying column 10；
The lower liquid phase of middle pressure flash column 2 enters low pressure flash chamber 3, carries out third level pressure release flash distillation, flashing pressure is
0.3MPaG, temperature are 143 DEG C, entrainment of substantial amounts of NH in flashed vapour3、H2S、CO、CO2, the gas such as COS, flashed vapour enters essence
The bottom of tower 10 is evaporated as thermal source；Operating pressure is 10~15% qualified dense ammonia of extraction in the middle part of 0.2MPaG, rectifying column in rectifying column
Water, wherein H2S content ＜ 10PPM, are used as the supplement of project assorted boiler desulfurization weak aqua ammonia；Collected overhead H2S、CO、CO2、COS
Deng sour gas, sulfur recovery system is removed, the qualified water outlet in bottom returns deoxygenation groove as supplement water.
The lower liquid phase of low pressure flash chamber 3 and the Heisui River of slag pool pump and gasification furnace driving and parking together enter vacuum flasher 4；
Carry out fourth stage pressure release flash distillation, flashing pressure is that -0.08~-0.05MPaG, temperature are 60~80 DEG C, vacuum flasher 4 it is upper
Portion's gas phase is through the partial condensation of vacuum flashing evaporator overhead condenser 8, into the gas-liquid separation of vacuum knockout drum 9, vacuum gas-liquid separation
The upper gaseous phase port of export connection vavuum pump of tank 9, the lower liquid phase of vacuum knockout drum 9 enters oxygen-eliminating device 17, vacuum flasher 4
(2% Heisui River enters defecator 5, and Heisui River is acted in defecator 5 in additional flocculating agents, realizes solid-liquor separation, is clarified containing solid for bottom
The top clarified solution of groove 5 enters ash water tank 6, and the bottom mortar of defecator 5 enters mortar-trough 7；The bottom mortar outlet connection ash of mortar-trough 7
Starch dehydration treatment equipment；Being partly into for ash water tank 5 and is partly into oxygen-eliminating device 17, the water of deoxygenation groove 17 at sewage disposal system
From ash water tank 5, vacuum knockout drum 9 and rectifying column 10, except deoxidation under the heat effect of low-pressure steam, directly through high-pressure pump
Washings are used as into scrubbing tower.
Transformation system is using low-carbon water than flow, and deoxygenation groove is atmospheric pressure device, and water temperature is 109 DEG C or so, passes through high-pressure pump
Directly enter scrubbing tower.
Deoxygenation groove is equipment with pressure, and temperature is 145 DEG C or so, and scrubbing tower is directly entered by high-pressure pump.
A kind of coal chemical industry buck flash distillation process technique and system for reducing ammonia accumulation, the flashed vapour of high pressure flash tower passes through again
The device heating kettle liquid of rectifying column 10 is boiled, is entered after condensation from the top of rectifying column 10, the kettle liquid for being heated gasification is entered as steam source of the gas
Enter the bottom of rectifying column 10.
A kind of coal chemical industry buck flash distillation process system for reducing ammonia accumulation, the flashed vapour of middle pressure flash column is added by reboiler
The kettle liquid of thermal rectification tower 10, enters after condensation from the top of rectifying column 10, is heated the kettle liquid gasified as steam source of the gas and enters rectifying
The bottom of tower 10.
It is last it is to be noted that：Above example is only limited to illustrate the technical solution of the utility model, rather than to it
System.Although the utility model is described in detail with reference to the foregoing embodiments, one of ordinary skill in the art should manage
Solution：It can still be modified to the technical scheme described in foregoing embodiments, or which part technical characteristic is entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment of the utility model
The spirit and scope of technical scheme.
Claims (8)
1. a kind of system for the coal chemical industry buck flash distillation process for reducing ammonia accumulation, it is characterised in that including：Middle pressure flash column, low
Press flash tank, vacuum flasher, defecator, ash water tank, oxygen-eliminating device, mortar-trough, vacuum flashing evaporator overhead condenser, vacuum gas-liquid point
From tank, rectifying column, waste heat boiler, middle pressure flash distillation gas condenser, middle pressure flash separation tank, acid Gas Cooler, rich ammonia condensation
Device, rich ammonia condensing knockout drum；The import that the upper gaseous phase port of export of medium pressure flash column passes through pipeline and the waste heat boiler
End connection, the port of export of the waste heat boiler enters promoting the circulation of qi through medium pressure flash distillation gas condenser connection medium pressure flash separation tank
Liquid is separated, and medium pressure flash separation tank top outlet side connects the bottom of the rectifying column, medium pressure flash separation tank
The lower liquid phase port of export connects the top of the rectifying column through pump；The lower liquid phase port of export of medium pressure flash column is connected to institute
State the entrance point of low pressure flash chamber；The upper gaseous phase port of export of the low pressure flash chamber connects the bottom of the rectifying column；It is described
The lower liquid phase port of export of low pressure flash chamber is connected to the entrance point of the vacuum flasher；The rectifier outlet side warp
Acid Gas Cooler is connected to sulfur recovery unit, and the middle part side line outlet of the rectifying column connects entering for the rich ammonia condenser
Mouth end, the rich ammonia condensing knockout drum, the top gas of the rich ammonia condensing knockout drum are connected to through the rich ammonia condenser
Body does desulfurizing agent, and the bottom liquid outlet end of the rich ammonia condensing knockout drum is connected to the rectifying column as backflow；It is described
The bottom liquid phases port of export of rectifying column connects the entrance point of the oxygen-eliminating device；The upper gaseous phase port of export warp of the vacuum flasher
The entrance point that the vacuum flashing evaporator overhead condenser is connected to the vacuum knockout drum is crossed, the vacuum knockout drum
The upper gaseous phase port of export connects vavuum pump, and the lower liquid phase port of export of the vacuum knockout drum connects entering for the oxygen-eliminating device
Mouth end, the lower liquid phase port of export of the vacuum flasher is connected to the entrance point of the defecator, the top of the defecator
The clarified solution port of export is connected to the entrance point of the ash water tank, and the defecator bottom mortar port of export connects the mortar-trough；
The bottom mortar port of export connection mortar dehydration treatment equipment of the mortar-trough；The port of export connection sewage disposal of the ash water tank
System and the oxygen-eliminating device, the liquid-phase outlet end of the oxygen-eliminating device connect scrubbing tower through high-pressure pump.
2. the system of the coal chemical industry buck flash distillation process according to claim 1 for reducing ammonia accumulation, it is characterised in that：It is described
Deoxygenation groove is atmospheric pressure device, and water temperature is 109 DEG C, and scrubbing tower is directly entered by high-pressure pump.
3. the system of the coal chemical industry buck flash distillation process according to claim 1 for reducing ammonia accumulation, it is characterised in that：It is described
Deoxygenation groove is equipment with pressure, and temperature is 145 DEG C, and scrubbing tower is directly entered by high-pressure pump.
4. the system of the coal chemical industry buck flash distillation process according to claim 1 for reducing ammonia accumulation, it is characterised in that：It is described
The flashed vapour that middle pressure flash column comes out heats the rectifying column kettle liquid by reboiler, enters after condensation from the rectifier
Enter, the kettle liquid for being heated gasification enters the bottom of the rectifying column as steam source of the gas.
5. a kind of system for the coal chemical industry buck flash distillation process for reducing ammonia accumulation, it is characterised in that including：High pressure flash tower, in
Flash column, low pressure flash chamber, vacuum flasher, defecator, ash water tank, oxygen-eliminating device, mortar-trough, vacuum flashing top is pressed to condense
Device, vacuum knockout drum, rectifying column, waste heat boiler, high pressure flash gas condenser, high pressure flash knockout drum, acid air cooling
Device, rich ammonia condenser, rich ammonia condensing knockout drum；The upper gaseous phase port of export of the high pressure flash tower connects the waste heat boiler
Entrance point, the port of export of the waste heat boiler connects the high pressure flash knockout drum through the high pressure flash gas condenser and carries out
Gas-liquid separation, the top outlet side of the high pressure flash knockout drum connects the bottom of the rectifying column, the high pressure flash separation
The lower liquid phase port of export of tank enters the top of the rectifying column through pump；The lower liquid phase port of export of described high pressure flash tower connects
It is connected to the entrance point of medium pressure flash column；The upper gaseous phase port of export of medium pressure flash column enters under the rectifying column
Portion；The lower liquid phase port of export of medium pressure flash column is connected to the entrance point of the low pressure flash chamber；The low pressure flash chamber
The upper gaseous phase port of export connect the bottom of the rectifying column；The lower liquid phase port of export of the low pressure flash chamber is connected to described
The entrance point of vacuum flasher；The rectifier exhaust outlets end is connected to sulfur recovery unit through acid Gas Cooler, institute
The entrance point of the connection rich ammonia condenser in side line outlet in the middle part of rectifying column is stated, is connected to through the rich ammonia condenser described
Rich ammonia condensing knockout drum, the rich ammonia condensing knockout drum upper gas does desulfurizing agent, and bottom liquid backflow end is connected to described
Rectifying column is used as backflow；The bottom liquid phases port of export of the rectifying column connects the entrance point of the oxygen-eliminating device；The vacuum flashing
The upper gaseous phase port of export of tank passes through the vacuum flashing evaporator overhead condenser, is connected to the import of the vacuum knockout drum
End, the upper gaseous phase port of export connection vavuum pump of the vacuum knockout drum, the lower liquid phase of the vacuum knockout drum
The port of export connects the entrance point of the oxygen-eliminating device, and the lower liquid phase port of export of the vacuum flasher is connected to the defecator
Entrance point, the top clarified solution port of export of the defecator is connected to the entrance point of the ash water tank, the bottom of the defecator
The mortar port of export connects the mortar-trough；The bottom mortar outlet connection mortar dehydration treatment equipment of the mortar-trough；The ash
The port of export connection sewage disposal system of tank and the oxygen-eliminating device, the liquid-phase outlet end of the oxygen-eliminating device is connected to through high-pressure pump
Scrubbing tower.
6. the system of the coal chemical industry buck flash distillation process according to claim 5 for reducing ammonia accumulation, it is characterised in that：It is described
Deoxygenation groove is atmospheric pressure device, and water temperature is 109 DEG C, and scrubbing tower is directly entered by high-pressure pump.
7. the system of the coal chemical industry buck flash distillation process according to claim 5 for reducing ammonia accumulation, it is characterised in that：It is described
Deoxygenation groove is equipment with pressure, and temperature is 145 DEG C, and scrubbing tower is directly entered by high-pressure pump.
8. the system of the coal chemical industry buck flash distillation process according to claim 5 for reducing ammonia accumulation, it is characterised in that：It is described
The flashed vapour that high pressure flash tower comes out heats the rectifying column kettle liquid by reboiler, enters after condensation from the rectifier
Enter, the kettle liquid for being heated gasification enters the bottom of the rectifying column as steam source of the gas.
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| CN201620689045.9U CN206408037U (en) | 2016-07-04 | 2016-07-04 | A kind of coal chemical industry buck flash distillation process system for reducing ammonia accumulation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967425A (en) * | 2016-07-04 | 2016-09-28 | 天津晟远环境有限公司 | Coal chemical industry grey water flashing treatment system capable of reducing ammonia accumulation and coal chemical industry grey water flashing treatment process capable of reducing ammonia accumulation |
| CN113181738A (en) * | 2021-06-16 | 2021-07-30 | 安徽晋煤中能化工股份有限公司 | Gas washing and dust removing device |
-
2016
- 2016-07-04 CN CN201620689045.9U patent/CN206408037U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967425A (en) * | 2016-07-04 | 2016-09-28 | 天津晟远环境有限公司 | Coal chemical industry grey water flashing treatment system capable of reducing ammonia accumulation and coal chemical industry grey water flashing treatment process capable of reducing ammonia accumulation |
| CN113181738A (en) * | 2021-06-16 | 2021-07-30 | 安徽晋煤中能化工股份有限公司 | Gas washing and dust removing device |
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