CN110104660A - A kind of first cooling system and technique for stripping chlorine in separation ammonia-containing gas again - Google Patents
A kind of first cooling system and technique for stripping chlorine in separation ammonia-containing gas again Download PDFInfo
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- CN110104660A CN110104660A CN201910410041.0A CN201910410041A CN110104660A CN 110104660 A CN110104660 A CN 110104660A CN 201910410041 A CN201910410041 A CN 201910410041A CN 110104660 A CN110104660 A CN 110104660A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/024—Purification
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Abstract
The present invention provides a kind of first cooling system and technique for stripping chlorine in separation ammonia-containing gas again, the first cooling technique for stripping chlorine in separation ammonia-containing gas again, the following steps are included: passing through the cooling gas containing ammonia and chlorine of first partial condensation, the remaining ammonia of abjection chlorine is sent with gas to follow-up system, then the solution of containing ammonium chloride and lye enter stripper, sodium or potassium in lye are reacted with ammonium chloride, generate alkali metal chloride, alkali metal chloride enters in treatment of wastewater from stripping, and ammonia enters in gas phase, ammonia vapour without chlorine is sent from the outlet of stripping dephlegmator to follow-up system, ammonia-nitrogen content in treatment of wastewater from stripping is lower than 200mg/l.
Description
Technical field
The present invention relates to the technology for isolating chlorine from the gas containing ammonia, in particular to a kind of first cooling strips separation again and contains
The system and technique of chlorine in ammonia gas.
Background technique
There has been no the technologies of separation of ammonia and chlorine from 100~420 DEG C of high-temperature gases.
Summary of the invention
It is an object of the present invention to for asking there has been no the separation of ammonia from 100~420 DEG C of high-temperature gases and chlorine method
Topic, propose it is a kind of it is first cooling strip chlorine technique in separation ammonia-containing gas again, this is simple for process, realizes the effective of ammonia and chlorine
Separation.
To achieve the above object, the technical solution adopted by the present invention is that: it is a kind of first cooling to be stripped in separation ammonia-containing gas again
The technique of chlorine, comprising the following steps: high-temperature gas is condensed and is cooled down, cooling obtained gas phase (the remaining ammonia including deviating from chlorine) is sent
To follow-up system, cooling obtained liquid phase includes the ammonium chloride that chlorine and ammonia generate, and the liquid phase containing ammonium chloride mixes together with lye
When or mixing after strip, the alkali metal (sodium or potassium) in lye reacted with chlorine generation alkali metal chloride, the alkali metal chlorination
Object enters in treatment of wastewater from stripping, realizes the separation of chlorine.
Further, the hot-gas temperature is 100~420 DEG C, in the high-temperature gas in addition to containing ammonia and chlorine, also
Contain hydrogen, carbon monoxide, carbon dioxide, methane, argon gas, nitrogen, hydrogen sulfide, carbonyl sulfide, hydrogen cyanide and vapor；Wherein ammonia
It is respectively 1~80% and 0.01~3% with volumetric concentration of the chlorine in gas.
Further, high-temperature gas being cooled to 50~100 DEG C, preferably 80~90 DEG C, chlorine and ammonia generate ammonium chloride, and
It is dissolved in solution, remaining ammonia still stays in the gas phase, send with gas to follow-up system, realizes the separation of gas and chlorine.In lye
Sodium or potassium reacted with ammonium chloride, generate alkali metal chloride, the alkali metal chloride enters in treatment of wastewater from stripping, and ammonia enters
In gas phase, send with gas phase to follow-up system, realize the separation of ammonia and chlorine.
Further, stripping is the following steps are included: the liquid containing ammonium chloride after the liquid phase containing ammonium chloride is mixed with lye
Enter number the 2nd or the 3rd piece of column plate (feedboard) on stripper, feedboard 1~30 block of column plate arranged below after mutually mixing with lye；
Liquid phase containing ammonium chloride is mixed with lye to be stripped the following steps are included: liquid phase and lye containing ammonium chloride simultaneously
Stripper is respectively enterd, wherein lye enters number the 2nd or the 3rd piece of column plate (lye feedboard) on stripper, contains ammonium chloride
Liquid phase feeding position sets low 1~3 block of column plate, lye feedboard 1~33 block of column plate arranged below than lye feed position；Alkali in lye
The molar ratio of chlorine is 1~2 in metal and high-temperature gas, and the ammonia-nitrogen content in treatment of wastewater from stripping is lower than 200mg/l.
Further, the lye be sodium hydroxide solution, potassium hydroxide solution, sodium carbonate liquor, sodium bicarbonate solution,
One of solution of potassium carbonate and potassium bicarbonate solution are a variety of, and the lye mass concentration is 1~nearly saturation.
Further, in stripping dephlegmator after condensation cooling, ammonia vapour is sent to subsequent system the ammonia vapour of stripper top evolution
System, the liquid phase for stripping dephlegmator return to the 1st block of column plate of number on stripper.
Further, the liquid phase of stripper bottom enters strip heater；In strip heater, liquid phase is by steam or leads
After the heating medium for heating such as hot oil, heat is taken back stripper by liquid phase, to strip heat supply.
Further, in treatment of wastewater from stripping cooler, treatment of wastewater from stripping is cooled after water or the cooling of heat recovery medium, stripping
Waste water is sent by the outlet of stripper gaseous effluent cooler to follow-up system.
Another object of the present invention also discloses a kind of first cooling system for stripping chlorine in separation ammonia-containing gas again, including
Gas segregator, stripper and collecting tank, the interior segmental baffle for being equipped with 1~20 piece of carry potential overflow weir of the collecting tank, the gas
Segregator liquid outlet is connected to the 1st piece of segmental baffle of collecting tank；The alkali liquor inlet be located on collecting tank the 1st piece of arch of number every
Plate；The collecting tank outlet is connected to stripper feedboard, and the stripper feedboard is upper number the 2nd or the 3rd block of column plate；It is described
Stripper top or top setting stripping dephlegmator, the stripping dephlegmator top are provided with gas vent.
Further, above system further includes strip heater and treatment of wastewater from stripping cooler, the stripper bottom tray
Tower bottom liquid outlet and tower bottom liquid entrance, the refrigerant inlet of the tower bottom liquid outlet and strip heater are provided on the side wall of lower section
Connection, (strip heater is connected the tower bottom liquid entrance with stripper with the connection of the refrigerant exit of strip heater；Stripping
The liquid phase of tower bottom enters strip heater；In strip heater, liquid phase is by after the heating medium for heating such as steam or conduction oil, liquid phase
Heat is taken back stripper, to strip heat supply)；The stripper tower bottom liquid outlet is connected to treatment of wastewater from stripping cooler heating agent entrance
(the treatment of wastewater from stripping cooler is connected with stripper, in treatment of wastewater from stripping cooler, the cooled water for the treatment of of wastewater from stripping or heat recovery
After medium is cooling, treatment of wastewater from stripping is sent by the outlet of stripper gaseous effluent cooler to follow-up system).
Another object of the present invention also discloses a kind of first cooling system for stripping chlorine in separation ammonia-containing gas again, including gas
Body cooler, separator and stripper, the gas cooler outlet are connected to separator inlet, the separator bottom liquid phase
Outlet is connected to stripper feedboard；
The alkali liquor inlet is located on stripper or on separator, when alkali liquor inlet is located on stripper, the lye
It is low into tower inlet ratio alkali liquor inlet that entrance is located at the 2nd block of column plate of number or the 3rd block of column plate, the separator bottom liquid phase on stripper
1~3 block of column plate；When alkali liquor inlet is located on separator, the separator bottom liquid phase is located at number on stripper into tower entrance
2nd block of column plate or the 3rd block of column plate；
The stripper top setting stripping dephlegmator, the stripping dephlegmator top or top are provided with gas vent.
Further, above system further includes strip heater and treatment of wastewater from stripping cooler, the stripper bottom tray
Tower bottom liquid outlet and tower bottom liquid entrance, the refrigerant inlet of the tower bottom liquid outlet and strip heater are provided on the side wall of lower section
Connection, (strip heater is connected the tower bottom liquid entrance with stripper with the connection of the refrigerant exit of strip heater；Stripping
The liquid phase of tower bottom enters strip heater；In strip heater, liquid phase is by after the heating medium for heating such as steam or conduction oil, liquid phase
Heat is taken back stripper, to strip heat supply)；The stripper tower bottom liquid outlet is connected to treatment of wastewater from stripping cooler heating agent entrance
(the treatment of wastewater from stripping cooler is connected with stripper, in treatment of wastewater from stripping cooler, the cooled water for the treatment of of wastewater from stripping or heat recovery
After medium is cooling, treatment of wastewater from stripping is sent by the outlet of stripper gaseous effluent cooler to follow-up system).
A kind of first cooling system and technique for stripping chlorine in separation ammonia-containing gas again of the present invention, according to the thermodynamics of chlorine and ammonia
Physical property, first the gas cooling containing chlorine and ammonia to 50~100 DEG C, chlorine and ammonia form ammonium chloride, and ammonium chloride is dissolved in liquid phase, remaining
Ammonia still stay the separation for realizing chlorine and gas in the gas phase；According to the principle of acid-base reaction, ammonium chloride and alkali metallic sodium or
Nak response generates stable strong acid and strong base salt, which is dissolved in liquid phase, and ammonia enters in gas phase, realizes ammonia and chlorine separation；It is logical
It crosses plus alkali strips, make the ammonia-nitrogen content in treatment of wastewater from stripping lower than 200mg/l, improve ammonia and chlorine separation degree.
Detailed description of the invention
Fig. 1 is a kind of first cooling system and process flow chart for stripping chlorine in separation ammonia-containing gas again of the embodiment of the present invention 1.
Fig. 2 is a kind of first cooling system and process flow chart for stripping chlorine in separation ammonia-containing gas again of the embodiment of the present invention 2.
Fig. 3 is a kind of first cooling system and process flow chart for stripping chlorine in separation ammonia-containing gas again of the embodiment of the present invention 3.
Wherein appended drawing reference is respectively as follows:
1- gas segregator；2- gas cooler；3- separator；4- stripper；5- stripper segregator；6- stripper adds
Hot device；7- stripper gaseous effluent cooler.
Specific embodiment
The invention discloses a kind of first cooling techniques for stripping chlorine in separation ammonia-containing gas again, comprising the following steps:
Gas of the high temperature containing ammonia and chlorine, into gas segregator, cooled water or heat recovery medium are cooled to
50~100 DEG C, chlorine and ammonia reaction generate ammonium chloride, and dissolution enters liquid phase；The remaining ammonia for having separated chlorine is segregated with gas by gas
The discharge of device top, send to follow-up system；Ammonium chloride flow to the 1st piece of band of the upper number in the collecting tank of gas segregator bottom with liquid phase and overflows
The segmental baffle on weir is flowed, lye is also sent directly into the segmental baffle, during step by step tray flows downward, ammonium chloride and lye
Middle alkali metallic sodium or nak response generate sodium chloride or potassium chloride, and sodium chloride or potassium chloride stay in the liquid phase, weakly alkaline ammonia point
It separates out and；Liquid phase flows into number the 2nd or the 3rd piece of column plate (feedboard) on stripper by sump bottom, and free ammonia is in stripper
Stripping, the ammonia vapour without chlorine are escaped by stripper top, and into stripping dephlegmator, be cooled water or the cooling of heat recovery medium
After fractional condensation, the ammonia vapour containing ammonia is sent to follow-up system, is stripped the liquid phase of dephlegmator as reflux, is returned to the 1st piece of tower of number on stripper
Plate；
The segmental baffle on 1~20 piece of carry potential overflow weir is equipped in the collecting tank, in favor of making alkali gold in ammonium chloride and lye
Belong to sodium or nak response is complete；
It is lower than 200mg/l for the ammonia-nitrogen content in control treatment of wastewater from stripping, 1~30 tower is set under stripper feedboard
Plate.
The high temperature contains the gas of chlorine and ammonia, and into gas cooler, be cooled water or the cooling of heat recovery medium
To 50~100 DEG C, chlorine and ammonia reaction generate ammonium chloride, and gas-liquid two-phase, which enters in separator, to be separated, separated the remaining ammonia of chlorine with
Gas is sent by being discharged at the top of separator to follow-up system；Ammonium chloride is discharged into stripper by separator bottom with liquid phase, with oneself
It is above contacted lowerly containing the liquid phase step by step tray of alkali metallic sodium or potassium, ammonium chloride and alkali metallic sodium or nak response generate sodium chloride or chlorine
Change potassium, sodium chloride or potassium chloride are stayed in the liquid phase, weakly alkaline ammonia separation come out, free ammonia strips in stripper, is free of
The ammonia vapour of chlorine is escaped by stripper top, into stripping dephlegmator, is cooled after water or the cooling fractional condensation of heat recovery medium, is contained
The ammonia vapour of ammonia is sent to follow-up system, is stripped the liquid phase of dephlegmator as reflux, is returned to the 1st block of column plate of number on stripper；
The lye number the 2nd or the 3rd piece of column plate (feedboard) from stripper, step by step tray and in lower ground flow process, with liquid
Ammonium chloride reaction in phase；
The ammonium chloride solution feed entrance point, 1~3 block of column plate lower than lye；
It is lower than 200mg/l for the ammonia-nitrogen content in control treatment of wastewater from stripping, 1~33 piece of tower is set under stripper feedboard
Plate.
The high temperature contains the gas of chlorine and ammonia, and into gas cooler, be cooled water or the cooling of heat recovery medium
To 50~100 DEG C, chlorine and ammonia reaction generate ammonium chloride, and gas-liquid two-phase, which enters in separator, to be separated, separated the remaining ammonia of chlorine with
Gas is sent by being discharged at the top of separator to follow-up system；Lye is added in separator, after mixing with ammonium chloride solution, with liquid phase
Be discharged by separator bottom, into stripper on number the 2nd or the 3rd piece of column plate (feedboard), ammonium chloride and alkali metallic sodium or potassium
Step by step tray contact, reaction generates sodium chloride or potassium chloride, sodium chloride or potassium chloride stay in the liquid phase, weakly alkaline ammonia separation gone out
Come, free ammonia strips in stripper, and the ammonia vapour without chlorine is escaped by stripper top, into stripping dephlegmator, is cooled
After water or the cooling fractional condensation of heat recovery medium, the ammonia vapour containing ammonia is sent to follow-up system, is stripped the liquid phase of dephlegmator as reflux, is returned
The 1st block of column plate of number on back-steam stripper；
The mixed liquor of the lye and ammonium chloride solution number the 2nd or the 3rd block of column plate from stripper, step by step tray and flow lowerly
In the process, it is further reacted with the ammonium chloride in liquid phase；
It is lower than 200mg/l for the ammonia-nitrogen content in control treatment of wastewater from stripping, 1~30 piece of tower is set under stripper feedboard
Plate.
For the heat and mass for realizing stripper, it is equipped with stripping dephlegmator in stripper top, is returned using cooling water or heat
The cooling ammonia vapour without chlorine entered in stripping dephlegmator of medium condensation is received, strips the liquid phase of dephlegmator as reflux, from stripping
The outflow of dephlegmator bottom enters the 1st block of column plate of number on stripper.Evolution is sent without the ammonia vapour of chlorine to subsequent at the top of stripping dephlegmator
System；
The stripper can be as plate column or packed tower or board-like and filler combined column；
The number of plates of plate column of the present invention can be scaled equivalent packed height according to the performance of filler；
The present invention uses plate column, is to describe conveniently；
Plate column or packed tower are the publicly available technologies in market.
To further decrease the ammonia content in liquid phase, it is equipped with strip heater in stripper bottom, using steam or thermally conductive
The heating agents such as oil are as heat source.
The treatment of wastewater from stripping of stripper bottom discharge, be cooled water or the cooling of heat recovery medium in treatment of wastewater from stripping cooler
Afterwards, it send to follow-up system.
Temperature containing chlorine and ammonia gas is 100~420 DEG C, and hydrogen, carbon monoxide, carbon dioxide, sulphur are also contained in gas
Change the components such as hydrogen and vapor, wherein the volumetric concentration of ammonia and chlorine in gas is respectively 1~80% and 0.01~3%.
Lye be sodium hydroxide solution, potassium hydroxide solution, sodium carbonate liquor and sodium bicarbonate solution, solution of potassium carbonate and
Potassium bicarbonate solution.
The lye mass concentration is 1~nearly saturation.
Another object of the present invention also discloses a kind of first cooling system and work for stripping chlorine in separation ammonia-containing gas again
Skill, including gas segregator, gas cooler, separator, stripper strip dephlegmator, and strip heater and treatment of wastewater from stripping are cold
But device；
The gas segregator is connected by collecting tank under it with stripper；High temperature contains the gas of ammonia and chlorine in gas point
In condenser, after water or the heat recovery medium partial condensation of being cooled are cooling, 50~100 DEG C of remaining ammonia for being stripped of chlorine with gas by
Gas segregator top exit is sent to follow-up system, and liquid phase enters stripper by collecting tank；
At lower than 100 DEG C, chlorine and ammonia reaction generate ammonium chloride, and the collecting tank under it is flow to liquid phase；In collecting tank
Segmental baffle equipped with 1~20 piece of carry potential overflow weir, the liquid phase and lye of containing ammonium chloride enter first piece of bow of upper number in collecting tank
On shape partition, in step by step tray during lower ground, alkali metallic sodium and nak response generate sodium chloride or potassium chloride in ammonium chloride and lye,
Ammonia separation is come out, the separation of chlorine and ammonia is realized；
The stripper segregator is connected with stripper, and the gas phase of stripper top evolution enters stripper segregator；?
In stripper segregator, gas phase is cooled after water or the cooling fractional condensation of heat recovery medium, and ammonia vapour is sent by the outlet of stripper segregator
To follow-up system, the liquid phase of dephlegmator outlet at bottom is stripped as reflux, returns to the 1st block of column plate of number on stripper；
Enter number the 2nd or the 3rd piece of column plate (feedboard) on stripper from collecting tank liquid phase, avoids gas phase band liquid；Into
1~30 block of column plate is set under flitch, to control the ammonia-nitrogen content in treatment of wastewater from stripping lower than 200mg/l.
The gas cooler is connected with separator；High temperature contains the gas of ammonia and chlorine in gas cooler, is cooled
After water or heat recovery medium partial condensation are cooling, into separator, 50~100 DEG C of remaining ammonia for being stripped of chlorine with gas by
Separator top exit is sent to follow-up system, and liquid phase enters stripper top by separator bottom outflow, and feed entrance point compares lye
Low 1~3 block of column plate of import；
At lower than 100 DEG C, chlorine and ammonia reaction generate ammonium chloride, and flow in separator with liquid phase；
The lye number the 2nd or the 3rd block of column plate from stripper enter, and avoid gas phase band liquid；Liquid phase from top to down
In flow process, wherein alkali metallic sodium or potassium step by step tray are reacted with chlorine and ammonium chloride；
At the ammonium chloride liquid phase feeding on stripper top, 1~30 block of column plate of lower setting, in favor of chlorine and alkali metallic sodium
Or nak response is complete, and the ammonia-nitrogen content controlled in treatment of wastewater from stripping is lower than 200mg/l；
The stripper segregator is connected with stripper, and the gas phase of stripper top evolution enters stripper segregator；?
In stripper segregator, gas phase is cooled after water or the cooling fractional condensation of heat recovery medium, and ammonia vapour is sent by the outlet of stripper segregator
To follow-up system, the liquid phase of dephlegmator outlet at bottom is stripped as reflux, returns to the 1st block of column plate of number on stripper.
The gas cooler is connected with separator；High temperature contains the gas of ammonia and chlorine in gas cooler, is cooled
After water or heat recovery medium partial condensation are cooling, into separator, 50~100 DEG C of remaining ammonia for being stripped of chlorine with gas by
Separator top exit is sent to follow-up system；
Lye is added in separator, after mixing with ammonium chloride solution, enters number the 2nd on stripper by separator bottom outflow
Or the 3rd block of column plate, avoid gas phase band liquid；In liquid phase from top to down flow process, wherein alkali metallic sodium or potassium step by step tray and chlorine
It is reacted with ammonium chloride；
At lower than 100 DEG C, chlorine and ammonia reaction generate ammonium chloride, and flow in separator with liquid phase；
At stripper liquid phase feeding, 1~30 block of column plate of lower setting, so that chlorine and alkali metallic sodium or nak response are complete
Entirely, and the ammonia-nitrogen content in control treatment of wastewater from stripping is lower than 200mg/l；
The stripper segregator is connected with stripper, and the gas phase of stripper top evolution enters stripper segregator；?
In stripper segregator, gas phase is cooled after water or the cooling fractional condensation of heat recovery medium, and ammonia vapour is sent by the outlet of stripper segregator
To follow-up system, the liquid phase of dephlegmator outlet at bottom is stripped as reflux, returns to the 1st block of column plate of number on stripper.
The reflux of the stripper, from stripper segregator.
Reflux returns to the 1st block of column plate of upper number of stripper, to keep the stable operation of stripper.
The heat supply of the stripper, from stripper heater.
The liquid phase being heated returns to stripper lower part, and the ammonia stripping in liquid phase is entered gas phase, useless to ensure to strip
Ammonia-nitrogen content in water is lower than 200mg/l.
Temperature containing chlorine and ammonia gas is 100~420 DEG C, and hydrogen, carbon monoxide, carbon dioxide, first are also contained in gas
The components such as alkane, argon gas, nitrogen, hydrogen sulfide, carbonyl sulfide, hydrogen cyanide and vapor, wherein the volume of ammonia and chlorine in gas is dense
Degree is respectively 1~80% and 0.01~3%.
The lye is sodium hydroxide solution, potassium hydroxide solution, sodium carbonate liquor and sodium bicarbonate solution, potassium carbonate is molten
One of liquid and potassium bicarbonate solution are a variety of, and the lye mass concentration is 1~nearly saturation.
The stripper heater is connected with stripper；The liquid phase of stripper bottom enters stripper heater；It is stripping
In tower heater, for liquid phase by after the heating medium for heating such as steam or conduction oil, heat is taken back stripper by liquid phase, to strip heat supply.
The stripper gaseous effluent cooler is connected with stripper, and it is cooling that the liquid phase of stripper bottom enters stripper waste water
Device；In stripper gaseous effluent cooler, liquid phase is cooled after water or the cooling of heat recovery medium, and treatment of wastewater from stripping is by stripper waste water
Cooler outlet is sent to follow-up system.
Embodiment 1
Present embodiment discloses the systems of chlorine and ammonia in a kind of separation gas, as shown in Figure 1, including gas segregator 1, vapour
Stripper 4, stripping dephlegmator 5, collecting tank, strip heater 6, treatment of wastewater from stripping cooler 7, the collecting tank are located at gas segregator
1 lower section, the interior segmental baffle for being equipped with 1~20 piece of carry potential overflow weir of the collecting tank, 1 liquid outlet of gas segregator and liquid collecting
The 1st piece of segmental baffle connection of slot；The alkali liquor inlet is located at the 1st piece of segmental baffle of number on collecting tank；Collecting tank outlet with
The connection of 4 feedboard of stripper, 4 feedboard of stripper are upper number the 2nd or the 3rd block of column plate；Vapour is set at the top of the stripper 4
Dephlegmator 5 is mentioned, is provided with gas vent at the top of the stripping dephlegmator 5.It is set on side wall below 4 bottom tray of stripper
It is equipped with tower bottom liquid outlet and tower bottom liquid entrance, the tower bottom liquid outlet is connected to the refrigerant inlet of strip heater 6, the tower bottom
Liquid entrance is connected to the refrigerant exit of strip heater 6；4 tower bottom liquid of the stripper outlet and 7 heating agent for the treatment of of wastewater from stripping cooler
Entrance connection.
The present embodiment also discloses a kind of technique for separating chlorine and ammonia in gas, using above system, comprising the following steps:
200~210 DEG C of high temperature contain chlorine, ammonia, hydrogen, carbon monoxide, carbon dioxide, methane, argon gas, nitrogen, hydrogen sulfide, oxygen sulphur
It is 1.2~1.3% that the volumetric concentration of the components such as change carbon, hydrogen cyanide and vapor, ammonia and chlorine, which is respectively 60~65%, and gas enters
Gas segregator 1 is cooled to 85~95 DEG C by heat recovery medium, and 85~95 DEG C of remaining ammonia for being stripped of chlorine are with gas by gas
The discharge of 1 top of segregator, send to follow-up system；The liquid collecting of 1 lower part of liquid phase inflow gas segregator of 85~95 DEG C of containing ammonium chlorides
Slot goes up hybrid reaction in the 1st piece of segmental baffle of number with 15~16% sodium hydroxide solution of mass concentration of feeding in collecting tank,
Step by step tray and under flow process in, sodium reacted with ammonium chloride generate sodium chloride, ammonia separation is come out, sodium chloride stays in liquid phase
In, and be discharged with treatment of wastewater from stripping.
Liquid phase from 1 collecting tank of gas segregator enters the 3rd column plate (feedboard) of number on stripper 4；Feedboard it
26 blocks of column plates of lower setting, after stripping, 100~150mg/l of ammonia-nitrogen content in waste water.
The molar ratio of sodium and chlorine is 1.5~1.55.
120~125 DEG C of gas phases without chlorine, stripper segregator 5 are escaped into from the top of stripper 4, by heat recovery
After medium cooling is segregated to 110~105 DEG C, 110~105 DEG C of ammonia vapour are exported by stripping dephlegmator 5 and are escaped, and are sent to follow-up system；
Liquid phase is flowed out from stripping 5 bottom of dephlegmator, returns to the 1st block of column plate of upper number of stripper 4.
Steam heats the waste water from 4 bottom of stripper in stripper heater 6, and the waste water after heating takes back heat
Stripper 4.
The treatment of wastewater from stripping of 4 bottom of stripper discharge, in stripper gaseous effluent cooler 7, after the cooling of heat recovery medium,
Drain into follow-up system.
Embodiment 2
Present embodiment discloses the systems of chlorine and ammonia in a kind of separation gas, as shown in Fig. 2, including gas cooler 2, dividing
From device 3, stripper 4, stripping dephlegmator 5, strip heater 6, treatment of wastewater from stripping cooler 7.The gas cooler 2 exports and divides
It is connected to from 3 entrance of device, 3 bottom liquid phases of the separator outlet is connected to 4 feedboard of stripper；The alkali liquor inlet is located at stripping
The 2nd block of column plate of number or the 3rd block of column plate on tower 4；Low 1~3 block of column plate of the separator bottom liquid phase inlet ratio alkali liquor inlet；It is described
Setting strips dephlegmator 5 above stripper 4, is provided with gas vent at the top of the stripping dephlegmator 5.4 bottom of stripper
Tower bottom liquid outlet and tower bottom liquid entrance are provided on side wall below column plate, the tower bottom liquid outlet is cold with strip heater 6
The connection of matchmaker's entrance, the tower bottom liquid entrance are connected to the refrigerant exit of strip heater 6；4 tower bottom liquid of stripper outlet with
The connection of 7 heating agent entrance for the treatment of of wastewater from stripping cooler.
The present embodiment also discloses a kind of technique for separating chlorine and ammonia in gas, using above system, comprising the following steps:
210~215 DEG C of high temperature contain chlorine, ammonia, hydrogen, carbon monoxide, carbon dioxide, methane, argon gas, nitrogen, hydrogen sulfide, oxygen sulphur
It is 0.6~0.8% that the volumetric concentration of the components such as change carbon, hydrogen cyanide and vapor, ammonia and chlorine, which is respectively 15~20%, and gas enters
Gas cooler 2 is cooled after being water-cooled to 75~80 DEG C, and gas-liquid two-phase, which enters in separator 3, to be separated.
75~80 DEG C of remaining ammonia for being stripped of chlorine, by being discharged at the top of separator 3, are sent to follow-up system with gas.75~80 DEG C
Liquid phase enters the 4th piece of column plate (feedboard) of number on stripper 4 by 3 bottom of separator, and 20 blocks of column plates are arranged under feedboard.
15~20% sodium carbonate liquor of mass concentration, which is sent into, enters the 2nd block of column plate of number on stripper 4.
The molar ratio of potassium and chlorine is 1.5~1.6.
During step by step tray is lower, sodium reacts the sodium chloride generated with ammonium chloride, and sodium chloride stays in the liquid phase, and with vapour
Propose waste water discharge；The ammonia decomposited is through stripping, into gas phase.
90~100mg/l of ammonia-nitrogen content after stripping in waste water.
130~135 DEG C of gas phases without chlorine, stripper segregator 5 is escaped into from the top of stripper 4, and be cooled water cooling
But after being segregated to 110~115 DEG C, 110~115 DEG C of ammonia vapour are exported by stripping dephlegmator 5 and are escaped, and are sent to follow-up system；Liquid phase from
The outflow of 5 bottom of dephlegmator is stripped, the 1st block of column plate of upper number of stripper 4 is returned.
Conduction oil heats the waste water from 4 bottom of stripper in stripper heater 6, and the waste water after heating is heat band
Back-steam stripper 4.
The treatment of wastewater from stripping of 4 bottom of stripper discharge, in stripper gaseous effluent cooler 7, after the water that is cooled is cooling, after draining into
Continuous system.
Embodiment 3
Present embodiment discloses the systems of chlorine and ammonia in a kind of separation gas, as shown in Figure 3 include gas cooler 2, divide
From device 3, stripper 4, stripping dephlegmator 5, strip heater 6, treatment of wastewater from stripping cooler 7.The gas cooler 2 exports and divides
It is connected to from 3 entrance of device, 3 bottom liquid phases of the separator outlet is connected to 4 feedboard of stripper；The alkali liquor inlet is located at separation
On device 3, lye is directly accessed in separator；The separator bottom liquid phase is located at the 2nd piece of tower of number on stripper 4 into tower entrance
Plate；Setting strips dephlegmator 5 above the stripper 4, is provided with gas vent at the top of the stripping dephlegmator 5.The stripping
Tower bottom liquid outlet and tower bottom liquid entrance are provided on side wall below 4 bottom tray of tower, the tower bottom liquid outlet is heated with stripping
The refrigerant inlet of device 6 is connected to, and the tower bottom liquid entrance is connected to the refrigerant exit of strip heater 6；4 bottom liquid of stripper
Body outlet is connected to treatment of wastewater from stripping cooler heating agent entrance.
250~260 DEG C of high temperature contain chlorine, ammonia, hydrogen, carbon monoxide, carbon dioxide, methane, argon gas, nitrogen, hydrogen sulfide, oxygen sulphur
It is 2.1~2.2% that the volumetric concentration of the components such as change carbon, hydrogen cyanide and vapor, ammonia and chlorine, which is respectively 35~40%, and gas enters
Gas cooler 2 is cooled after being water-cooled to 80~90 DEG C, and gas-liquid two-phase, which enters in separator 3, to be separated.
25~30% solution of potassium carbonate of mass concentration is sent into separator 3, is mixed with ammonium chloride solution.
The molar ratio of potassium and chlorine is 1.4~1.5.
80~90 DEG C of remaining ammonia for being stripped of chlorine, by being discharged at the top of separator 3, are sent to follow-up system with gas.80~90 DEG C
Liquid phase enters the 2nd piece of column plate (feedboard) of number on stripper 4 by 3 bottom of separator, 8 blocks of column plates of setting and quite under feedboard
In the filler of 18 blocks of column plates.
During step by step tray is lower, potassium further reacts the potassium chloride generated with ammonium chloride, and potassium chloride stays in the liquid phase,
And it is discharged with treatment of wastewater from stripping；The ammonia decomposited is through stripping, into gas phase.
100~110mg/l of ammonia-nitrogen content after stripping in waste water.
160~165 DEG C of gas phases without chlorine, stripper segregator 5 is escaped into from the top of stripper 4, and be cooled water cooling
But after being segregated to 145~150 DEG C, 145~150 DEG C of ammonia vapour are exported by stripping dephlegmator 5 and are escaped, and are sent to follow-up system；Liquid phase from
The outflow of 5 bottom of dephlegmator is stripped, the 1st block of column plate of upper number of stripper 4 is returned.
Conduction oil heats the waste water from 4 bottom of stripper in stripper heater 6, and the waste water after heating is heat band
Back-steam stripper 4.
The treatment of wastewater from stripping of 4 bottom of stripper discharge, in stripper gaseous effluent cooler 7, after the water that is cooled is cooling, after draining into
Continuous system.
Embodiment 4
The invention discloses the techniques of chlorine and ammonia in a kind of separation gas, are segregated using system as shown in Figure 1, including gas
Device 1, stripper 4, stripping dephlegmator 5, strip heater 6, treatment of wastewater from stripping cooler 7.
180~185 DEG C of high temperature contain chlorine, ammonia, hydrogen, carbon monoxide, carbon dioxide, methane, argon gas, nitrogen, hydrogen sulfide, oxygen sulphur
It is 0.3~0.6% that the volumetric concentration of the components such as change carbon, hydrogen cyanide and vapor, ammonia and chlorine, which is respectively 30~35%, and gas enters
Gas segregator 1, be cooled water or the cooling of heat recovery medium, and 70~80 DEG C of remaining ammonia for having separated chlorine are divided with gas by gas
The discharge of 1 top of condenser, send to follow-up system；The collecting tank of 1 lower part of liquid phase inflow gas segregator of 70~80 DEG C of containing ammonium chlorides,
With 5~6% potassium hydroxide solution of mass concentration of feeding in collecting tank hybrid reaction in upper the 1st piece of segmental baffle of number, by
Plate and under flow process in, in lye alkali metal potassium reacted with ammonium chloride generate potassium chloride, ammonia separation is come out, potassium chloride stays
In the liquid phase, and with treatment of wastewater from stripping it is discharged.
To avoid carrying secretly, the liquid phase from 1 collecting tank of gas segregator enters the (charging of the 2nd block of column plate of number on stripper 4
Plate)；25 blocks of column plates are set under feedboard, to control the ammonia-nitrogen content in treatment of wastewater from stripping lower than 200mg/l.
The molar ratio of sodium and chlorine is 1.25~1.35.
90~95 DEG C of gas phases without chlorine, stripper segregator 5 is escaped into from the top of stripper 4, and be cooled water or heat
After the cooling fractional condensation of amount recycling medium, 80~85 DEG C of ammonia vapour are exported by stripping dephlegmator 5 and are escaped, and are sent to follow-up system；Liquid phase is from vapour
The outflow of 5 bottom of dephlegmator is proposed, the 1st block of column plate of upper number of stripper 4 is returned.
The heating agents such as steam or conduction oil heat the waste water from 4 bottom of stripper, after heating in stripper heater 6
Waste water heat is taken back stripper 4.
The treatment of wastewater from stripping of 4 bottom of stripper discharge, in stripper gaseous effluent cooler 7, be cooled water or heat recovery matchmaker
It is situated between after cooling, drains into follow-up system.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of first cooling technique for stripping chlorine in separation ammonia-containing gas again, which comprises the following steps: by High Temperature Gas
Body condensation cooling, cooling obtained gas phase are sent to follow-up system, and cooling obtained liquid phase includes the ammonium chloride that chlorine and ammonia generate, and are contained
There is the liquid phase of ammonium chloride to mix with lye simultaneously or strip after mixing, the alkali metal in lye is reacted with chlorine generates alkali metal chlorination
Object, the alkali metal chloride enter in treatment of wastewater from stripping, realize the separation of chlorine.
2. the first cooling technique for stripping chlorine in separation ammonia-containing gas again according to claim 1, which is characterized in that the high temperature
Gas temperature is 100~420 DEG C, in the high-temperature gas in addition to containing ammonia and chlorine, also containing hydrogen, carbon monoxide, carbon dioxide,
Methane, argon gas, nitrogen, hydrogen sulfide, carbonyl sulfide, hydrogen cyanide and vapor；The wherein volumetric concentration of ammonia and chlorine in gas point
It Wei 1~80% and 0.01~3%.
3. the first cooling technique for stripping chlorine in separation ammonia-containing gas again according to claim 1 or claim 2, which is characterized in that will be high
Wet body is cooled to 50~100 DEG C.
4. the first cooling technique for stripping chlorine in separation ammonia-containing gas again according to claim 1, which is characterized in that contain chlorination
The liquid phase of ammonium strips after mixing with lye the following steps are included: the liquid phase containing ammonium chloride enters on stripper after mixing with lye
Number the 2nd or the 3rd block of column plate, feedboard 1~30 block of column plate arranged below；
Stripping simultaneously is mixed with lye for liquid phase containing ammonium chloride the following steps are included: the liquid phase containing ammonium chloride and lye are distinguished
Into stripper, wherein lye enters number the 2nd or the 3rd block of column plate, the liquid phase feeding position containing ammonium chloride on stripper and compares alkali
Liquid feed position sets low 1~3 block of column plate, lye feedboard 1~33 block of column plate arranged below；In lye in alkali metal and high-temperature gas
The molar ratio of chlorine is 1~2；
Ammonia-nitrogen content in treatment of wastewater from stripping is lower than 200mg/l.
5. according to claim 1 or the 4 first coolings strip the techniques for separating chlorine in ammonia-containing gas again, which is characterized in that described
Lye is sodium hydroxide solution, potassium hydroxide solution, sodium carbonate liquor, sodium bicarbonate solution, solution of potassium carbonate and saleratus
One of solution is a variety of, and the lye mass concentration is 1~nearly saturation.
6. the first cooling technique for stripping chlorine in separation ammonia-containing gas again according to claim 1, which is characterized in that stripping tower top
In stripping dephlegmator after condensation cooling, ammonia vapour is sent to follow-up system the ammonia vapour of portion's evolution, and the liquid phase for stripping dephlegmator returns to vapour
The 1st block of column plate of number on stripper.
7. a kind of first cooling system for stripping chlorine in separation ammonia-containing gas again, which is characterized in that including gas segregator, stripper
And collecting tank, the interior segmental baffle for being equipped with 1~20 piece of carry potential overflow weir of the collecting tank, the gas segregator liquid outlet and collection
The 1st piece of segmental baffle connection of liquid bath；The alkali liquor inlet is located at the 1st piece of segmental baffle of number on collecting tank；The collecting tank outlet
It is connected to stripper feedboard, the stripper feedboard is upper number the 2nd or the 3rd block of column plate；The stripper top or top
Setting stripping dephlegmator, the stripping dephlegmator top are provided with gas vent.
8. a kind of first cooling system for stripping chlorine in separation ammonia-containing gas again according to claim 7, including strip heater
With treatment of wastewater from stripping cooler, tower bottom liquid outlet and tower bottom liquid entrance are provided on the side wall below the stripper bottom tray,
The tower bottom liquid outlet is connected to the refrigerant inlet of strip heater, the refrigerant exit of the tower bottom liquid entrance and strip heater
Connection；The stripper tower bottom liquid outlet is connected to treatment of wastewater from stripping cooler heating agent entrance.
9. a kind of first cooling system for stripping chlorine in separation ammonia-containing gas again, which is characterized in that including gas cooler, separator
And stripper, gas cooler outlet are connected to separator inlet, the separator bottom liquid-phase outlet and stripper into
Flitch connection；
The alkali liquor inlet is located on stripper or on separator, when alkali liquor inlet is located on stripper, the alkali liquor inlet
The 2nd block of column plate of number or the 3rd block of column plate on stripper, the separator bottom liquid phase is into tower inlet ratio alkali liquor inlet low 1~3
Block column plate；When alkali liquor inlet is located on separator, the separator bottom liquid phase is located at the 2nd piece of number on stripper into tower entrance
Column plate or the 3rd block of column plate；
The stripper top or top setting stripping dephlegmator, the stripping dephlegmator top are provided with gas vent.
10. a kind of first cooling system for stripping chlorine in separation ammonia-containing gas again according to claim 9, including strip heater
With treatment of wastewater from stripping cooler, tower bottom liquid outlet and tower bottom liquid entrance are provided on the side wall below the stripper bottom tray,
The tower bottom liquid outlet is connected to the refrigerant inlet of strip heater, the refrigerant exit of the tower bottom liquid entrance and strip heater
Connection；The stripper tower bottom liquid outlet is connected to treatment of wastewater from stripping cooler heating agent entrance.
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| CN112266001A (en) * | 2020-09-28 | 2021-01-26 | 南京信息工程大学 | Ammonia gas quantitative generation-reaction device and ammonia gas synchronous detection method |
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