CN112439310B - Water supplementing method for acrylonitrile device quench tower - Google Patents
Water supplementing method for acrylonitrile device quench tower Download PDFInfo
- Publication number
- CN112439310B CN112439310B CN201910837004.8A CN201910837004A CN112439310B CN 112439310 B CN112439310 B CN 112439310B CN 201910837004 A CN201910837004 A CN 201910837004A CN 112439310 B CN112439310 B CN 112439310B
- Authority
- CN
- China
- Prior art keywords
- quenching
- water
- tower
- tank
- quench
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/506—Sulfuric acid
Abstract
The invention relates to a water supplementing method for an acrylonitrile device quench tower, which comprises the following steps: a quenching water tank is arranged to collect the recovered water from the four-effect evaporation unit, the ammonium sulfate concentration evaporation unit and the wastewater tank area; a quenching water pump is arranged behind the quenching water tank to send the recovered water in the quenching water tank to a quenching tower; the quenching tower is characterized in that a quenching water spray port is arranged at the top of the quenching tower and connected with a water spray distributor, and the reclaimed water is sent to the water spray distributor in the quenching tower through the quenching water spray port. The method can ensure the water supplementing stability of the quenching tower, simultaneously avoid the polymer carried in the gas phase at the top of the tower from blocking the components in the quenching tower, and ensure the stable operation of the quenching tower.
Description
Technical Field
The invention belongs to an acrylonitrile production process, and particularly relates to a water supplementing method for a quenching tower of an acrylonitrile device.
Background
In the acrylonitrile apparatus, the reaction gas enters a quenching tower through a reaction gas cooler, and is quenched by spraying a circulating liquid. And sulfuric acid is continuously added into the quenching tower for neutralizing unreacted ammonia, and the dilute ammonium sulfate solution at the tower bottom is circularly pumped to the catalyst sedimentation unit through the quenching tower.
The quenching tower needs to supplement quenching water in the operation process of spraying and quenching reaction gas, and in the prior art, the quenching water is mixed by a four-effect evaporator, an evaporation solution of an ammonium sulfate concentration unit and a plurality of strands of quenching water in a wastewater tank area and then is sent into the quenching tower. However, the above-mentioned source of quench water is unstable, and if the flow rate of quench water from the above-mentioned source fluctuates, the flow rate of the supplemental quench water fed into the quench tower is unstable, which causes instability in the operation of the quench tower and adversely affects the operation of the quench tower.
In addition, the reaction gas flows from bottom to top in the quenching tower, and when passing through the tower top inner component, the entrained polymer easily blocks the tower top inner component, thereby influencing the stable operation of the quenching tower.
Disclosure of Invention
The invention aims to provide a water supplementing method for an acrylonitrile device quenching tower, which solves the problem of unstable water supplementing of the quenching tower.
In order to achieve the above object, the present invention provides a method for supplementing water for a quenching tower of an acrylonitrile unit, comprising:
a quenching water tank is arranged to collect the recovered water from the four-effect evaporation unit, the ammonium sulfate concentration evaporation unit and the wastewater tank area;
a quenching water pump is arranged behind the quenching water tank to send the recovered water in the quenching water tank to a quenching tower;
the quenching tower is characterized in that a quenching water spray port is arranged at the top of the quenching tower and connected with a water spray distributor, and the reclaimed water is sent to the water spray distributor in the quenching tower through the quenching water spray port.
According to one aspect of the invention, an overhead gas phase pipeline is connected to the top of the quenching tower, and the recovered water in the quenching water tank is also used for being sent to the overhead gas phase pipeline;
and a flow controller is arranged on the overhead gas phase pipeline.
According to one aspect of the invention, the water spray distributor is provided with nozzles which are uniformly distributed in the quench tower along the circumferential direction.
According to one aspect of the invention, the nozzles are uniformly arranged on a circumference of 1/2 of the diameter of the quench tower.
According to one aspect of the invention, the nozzle has an angle of 70-86 DEG with the horizontal plane
According to one aspect of the invention, the nozzle has a pressure drop of 2.0kg/cm 2 The flow rate of the nozzle was 2.85m 3 /h。
According to one aspect of the present invention, the quench water tank is operated at a pressure of-0.49 to 0.06MPaG.
According to one aspect of the invention, nitrogen is introduced into the quenching water tank, and the amount of nitrogen introduced into the quenching water tank is controlled by adopting a step-by-step adjustment mode so as to control the pressure of the quenching water tank.
According to one aspect of the invention, the flow rate of the quench water pump is 10-50m 3 Preferably, the flow rate is 15-40m 3 /h。
According to one aspect of the invention, the volume of the quenching water tank is 10-60m 3 Preferably, the volume is 20 to 50m 3 。
According to one scheme of the invention, the replenishing method of the water for the quenching tower of the acrylonitrile device is characterized in that by arranging a quenching water tank and a quenching water pump, the recovered water from the four-effect evaporation unit, the ammonium sulfate concentration evaporation unit and the wastewater tank area is firstly collected into the quenching water tank, and then the recovered water in the quenching water tank 1 is pumped into the quenching tower through the quenching water pump. Therefore, the stability of the supplementing water in the quenching tower can be ensured, and the problem that the flow of the supplementing quenching water fed into the quenching tower is unstable if the flow of the quenching water from a certain source fluctuates when the recovering water from the four-effect evaporation unit, the ammonium sulfate concentration evaporation unit and the wastewater tank area is directly fed into the quenching tower in the prior art is avoided. The water supplementing method for the quenching tower can ensure the water supplementing stability, thereby ensuring the operation stability of the quenching tower.
According to one scheme of the invention, the spray nozzles are arranged on the water spray distributor, and are uniformly distributed along the circumference taking 1/2 of the diameter of the quench tower as the diameter, and meanwhile, a certain included angle exists between the spray nozzles and the horizontal plane, so that after the reclaimed water passes through the water spray distributor, the reclaimed water can be uniformly sprayed to the silk screen foam remover or the air lifting cap at the lower side of the water spray distributor, the problem that the polymer blocks the top assembly of the quench tower is avoided, and the working stability of the quench tower is ensured.
Drawings
FIG. 1 schematically illustrates a schematic view of a quench tower construction of an acrylonitrile unit in accordance with one embodiment of the present invention;
fig. 2 schematically shows a structural view of an arrangement of nozzles of a water spray distributor according to an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
In describing embodiments of the present invention, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in terms of orientation or positional relationship shown in the drawings for convenience of description and simplicity of description only, and do not denote or imply that the devices or elements in question must have a particular orientation, be constructed and operated in a particular orientation, so that the above terms are not to be construed as limiting the invention.
The present invention will be described in detail below with reference to the drawings and the specific embodiments, which are not described in detail herein, but the embodiments of the present invention are not limited to the following embodiments.
Referring to FIG. 1, the water replenishing method for the quenching tower of the acrylonitrile device of the invention comprises the following steps: a quenching water tank 1 is provided for collecting the recovered water 2, and a quenching water pump 3 is provided after the quenching water tank 1 to send the recovered water 2 in the quenching water tank 1 to a quenching tower 4. The quenching tower 4 of the invention is provided with a quenching water spray port 5 at the top, the quenching water spray port 5 is connected with a water spray distributor 6, and the water spray distributor 6 is arranged in the quenching tower 4. The recovery water 2 in the quenching water tank 1 is pumped to the water spray distributor 6 through the quenching water pump 3. In the present invention, the recovered water 2 includes recovered water from a four-effect evaporation unit, an ammonium sulfate concentration evaporation unit, and a wastewater tank farm.
According to the method for supplementing water for the quenching tower of the acrylonitrile device, the quenching water tank 1 and the quenching water pump 3 are arranged, the recovered water from the four-effect evaporation unit, the ammonium sulfate concentration evaporation unit and the wastewater tank area is firstly collected into the quenching water tank 1, and then the recovered water in the quenching water tank 1 is pumped into the quenching tower 4 through the quenching water pump 3. Thus, the stability of the supplementing water in the quenching tower 4 can be ensured, and the problem that the flow of the supplementing quenching water fed into the quenching tower is unstable if the flow of the quenching water from a certain source fluctuates when the recovering water from the four-effect evaporation unit, the ammonium sulfate concentration evaporation unit and the wastewater tank area is directly fed into the quenching tower in the prior art is avoided. The water supplementing method for the quenching tower can ensure the water supplementing stability, thereby ensuring the operation stability of the quenching tower 4.
In the present invention, the quenching tower 4 is provided with an overhead gas phase line 7 at the top, and the other end of the overhead gas phase line is connected to the post-quench cooler. The recovered water 2 in the quench tank 1 is also used for feeding into the overhead gas phase line. That is, in the present invention, the recovered water 2 in the cooling water receiving tank 1 has two supply paths, and a part of the two supply paths is sent to the quench water spray nozzles 5 of the quench tower 4 and further to the water spray distributor 6. The other part is sent to the overhead gas-phase line 7. A flow controller is provided on the overhead gas-phase line 7 for controlling the amount of recovered water fed into the overhead gas-phase line 7.
According to one embodiment of the present invention, the volume of the quenching water tank 1 is 10-60m 3 The volume of the quenching water tank 1 is limited to 20-50m 3 . The flow rate of the quenching water pump 3 is 10-50m 3 Preferably, the flow rate of the quenching water pump 3 is 15-40m 3 And/h. The operation pressure of the quenching water tank is-0.49-0.06 MPaG. In the invention, nitrogen is introduced into the quenching water tank 1, and the nitrogen amount in the quenching water tank is controlled by adopting a step-by-step regulation mode so as to control the pressure of the quenching water tank.
In the prior art, in the acrylonitrile apparatus, the reaction gas from the reaction gas cooler is fed into the bottom of the quenching tower through a gas distribution plate, and is brought into countercurrent contact with the circulating liquid (in the present invention, recovered water) from the upper part of the quenching tower by a circulating pump of the circulating liquid quenching tower, and sulfuric acid from outside the boundary zone is injected into the outlet line of the circulating pump of the quenching tower, and the reaction gas is quenched after being brought into contact with the circulating liquid. The reaction gas continuously rises after being sprayed by the uppermost circulating liquid, and a large number of liquid drops are entrained by the reaction gas due to the fact that the flow speed is high. The reaction gas continues to rise to the vicinity of the column top internals, at which time the droplets entrained by the reaction gas passing through the column internals have been separated for the most part, so that it is difficult to form a stable liquid flow layer on the tray of the layer only by the droplets entrained in the reaction gas, and the polymer entrained in the droplets is easy to adhere to the tray of the layer for a long time, and finally the column internals of the layer are blocked.
In order to solve the problem, the present invention provides a water spray distributor 6 in the top of the quenching tower 4. The water spray distributor 6 of the invention is provided with nozzles which are uniformly distributed in the quench tower 4 along the circumferential direction. According to one embodiment of the invention, the nozzles are uniformly arranged on the circumference of the quench tower 4 where 1/2 of the diameter is the diameter. The nozzle is at a certain angle to the horizontal plane, preferably 78 °.
In the invention, the water spray distributor 6 is provided with the nozzles which are uniformly distributed along the circumference taking 1/2 of the diameter of the quench tower as the diameter, and a certain included angle exists between the nozzles and the horizontal plane, thereby ensuring that the recovered water is uniformly connected with cold water after passing through the water spray distributor 6The silk screen demister or the rising air cap sprayed to the lower side of the water spray distributor 6 at the position avoids the problem that the polymer blocks the top component of the quenching tower, and ensures the working stability of the quenching tower. The pressure and flow rate of the nozzle can be set according to actual requirements, and according to one embodiment of the invention, the pressure drop of the nozzle is 2.0kg/cm 2 The flow rate of the nozzle was 2.85m 3 /h。
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for supplementing water for a quench tower of an acrylonitrile unit, comprising:
a quenching water tank is arranged to collect the recovered water from the four-effect evaporation unit, the ammonium sulfate concentration evaporation unit and the wastewater tank area;
a quenching water pump is arranged behind the quenching water tank to send the recovered water in the quenching water tank to a quenching tower;
the quenching tower top is provided with a quenching water spray port, the quenching water spray port is connected with a water spray distributor, and the recovered water is sent to the water spray distributor in the quenching tower through the quenching water spray port;
the top of the quenching tower is connected with a tower top gas phase pipeline, the reclaimed water in the quenching water tank is also used for being sent to the tower top gas phase pipeline, and the other end of the tower top gas phase pipeline is connected to a quenching aftercooler;
a flow controller is arranged on the overhead gas phase pipeline;
a silk screen foam remover or an air lifting cap is arranged on the lower side of the water spray distributor;
the water spray distributor is provided with nozzles which are uniformly distributed in the quench tower along the circumferential direction; the nozzles are uniformly distributed on the circumference with the diameter of 1/2 of the diameter of the quenching tower; the included angle between the nozzle and the horizontal plane is 70-86 degrees.
2. The method for supplementing water for a quenching tower in an acrylonitrile unit as claimed in claim 1, wherein the pressure drop of the nozzle is 2.0kg/cm 2 The flow rate of the nozzle was 2.85m 3 /h。
3. The method for replenishing water for a quenching tower of an acrylonitrile unit according to claim 1, wherein the operation pressure of the quenching water tank is-0.49 to 0.06mpa g.
4. A supplemental process for water for a quench tower of an acrylonitrile unit according to claim 3, wherein nitrogen is introduced into the quench tank and the amount of nitrogen introduced into the quench tank is controlled by a split-flow regulation to control the pressure of the quench tank.
5. The method for supplementing water to a quenching tower of an acrylonitrile unit according to claim 1, wherein the flow rate of the quenching water pump is 10-50m 3 /h。
6. The method for replenishing water for a quenching tower of an acrylonitrile unit according to claim 5, wherein the flow rate of the quenching water pump is preferably 15-40m 3 /h。
7. The method for replenishing water for a quenching tower of an acrylonitrile unit according to claim 1, wherein the volume of the quenching water tank is 10-60m 3 。
8. The method for replenishing water for an acrylonitrile unit quench tower according to claim 7, wherein the volume of the quench water tank is preferably 20 to 50m 3 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910837004.8A CN112439310B (en) | 2019-09-05 | 2019-09-05 | Water supplementing method for acrylonitrile device quench tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910837004.8A CN112439310B (en) | 2019-09-05 | 2019-09-05 | Water supplementing method for acrylonitrile device quench tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112439310A CN112439310A (en) | 2021-03-05 |
| CN112439310B true CN112439310B (en) | 2023-08-11 |
Family
ID=74733527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910837004.8A Active CN112439310B (en) | 2019-09-05 | 2019-09-05 | Water supplementing method for acrylonitrile device quench tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112439310B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4302434A (en) * | 1979-04-14 | 1981-11-24 | Davy International Aktiengesellschaft | Process for producing hydrogen and sulphur from hydrogen sulphide |
| CA2368486A1 (en) * | 1999-03-31 | 2000-10-05 | The Standard Oil Company | Process for the recovery of acrylonitrile and methacrylonitrile |
| CN1440963A (en) * | 2003-03-22 | 2003-09-10 | 张华堂 | Ethanol ammoxidizing process to synthesize high-purity acetonitrile |
| CN1508501A (en) * | 2002-12-18 | 2004-06-30 | 兰州瑞德干燥技术有限公司 | Nitrogen-cycle engineering plastic air current and fluidized bed drying method |
| JP2006225414A (en) * | 2005-02-15 | 2006-08-31 | Mitsubishi Rayon Co Ltd | Recovering method and recovering system of unreacted monomer component in polymerization of acrylonitrile monomer |
| CN101092265A (en) * | 2006-06-21 | 2007-12-26 | 中国石油化工股份有限公司 | Method for treating wastewater of dilute thiamine |
| CN101160639A (en) * | 2005-04-15 | 2008-04-09 | 3M创新有限公司 | Method of reusing flexible mold and microstructure precursor composition |
| CN102317820A (en) * | 2008-12-22 | 2012-01-11 | 3M创新有限公司 | The inside patterning multi-layer optical film that the birefringence of usage space selectivity reduces |
| CN105983313A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Apparatus and method for removing ammonia in ammoxidation gas |
| CN105983312A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Water supplementing apparatus and water supplementing method for quench tower |
| CN105983320A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Water replenishing device of quench tower |
| CN107941039A (en) * | 2016-10-12 | 2018-04-20 | 英尼奥斯欧洲股份公司 | Flash cold column aftercooler |
| EP3315186A1 (en) * | 2016-10-28 | 2018-05-02 | General Electric Company | Carbon capture systems comprising compressors and coolers |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69810001T2 (en) * | 1997-04-28 | 2003-04-17 | Seiko Epson Corp | Ink composition for producing a lightfast image |
| US6984749B2 (en) * | 2002-12-04 | 2006-01-10 | Bp Corporation North America Inc. | Method for inhibiting polymerization during the recovery and purification of unsaturated mononitriles |
| CN103964560A (en) * | 2014-05-26 | 2014-08-06 | 英尼奥斯欧洲股份公司 | Inlet nozzle for acid addition |
-
2019
- 2019-09-05 CN CN201910837004.8A patent/CN112439310B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4302434A (en) * | 1979-04-14 | 1981-11-24 | Davy International Aktiengesellschaft | Process for producing hydrogen and sulphur from hydrogen sulphide |
| CA2368486A1 (en) * | 1999-03-31 | 2000-10-05 | The Standard Oil Company | Process for the recovery of acrylonitrile and methacrylonitrile |
| CN1508501A (en) * | 2002-12-18 | 2004-06-30 | 兰州瑞德干燥技术有限公司 | Nitrogen-cycle engineering plastic air current and fluidized bed drying method |
| CN1440963A (en) * | 2003-03-22 | 2003-09-10 | 张华堂 | Ethanol ammoxidizing process to synthesize high-purity acetonitrile |
| JP2006225414A (en) * | 2005-02-15 | 2006-08-31 | Mitsubishi Rayon Co Ltd | Recovering method and recovering system of unreacted monomer component in polymerization of acrylonitrile monomer |
| CN101160639A (en) * | 2005-04-15 | 2008-04-09 | 3M创新有限公司 | Method of reusing flexible mold and microstructure precursor composition |
| CN101092265A (en) * | 2006-06-21 | 2007-12-26 | 中国石油化工股份有限公司 | Method for treating wastewater of dilute thiamine |
| CN102317820A (en) * | 2008-12-22 | 2012-01-11 | 3M创新有限公司 | The inside patterning multi-layer optical film that the birefringence of usage space selectivity reduces |
| CN105983313A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Apparatus and method for removing ammonia in ammoxidation gas |
| CN105983312A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Water supplementing apparatus and water supplementing method for quench tower |
| CN105983320A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Water replenishing device of quench tower |
| CN107941039A (en) * | 2016-10-12 | 2018-04-20 | 英尼奥斯欧洲股份公司 | Flash cold column aftercooler |
| EP3315186A1 (en) * | 2016-10-28 | 2018-05-02 | General Electric Company | Carbon capture systems comprising compressors and coolers |
Non-Patent Citations (1)
| Title |
|---|
| 王世雷.丙烯腈生产中节能降耗分析.中国优秀硕士学位论文全文数据库.2017,(第6期),B016-31. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112439310A (en) | 2021-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203777923U (en) | Improved ammonia removal process for reactor effluents | |
| CN103285614B (en) | Gas-phase rectifying method for steam containing ammonia in APT (ammonium paratungstate) production process and equipment | |
| CN112439310B (en) | Water supplementing method for acrylonitrile device quench tower | |
| US7753985B2 (en) | Reduction of biuret and free ammonia during a method for producing fertilizer granulates containing urea | |
| CN205797156U (en) | Feed distributor for the fluidized-bed reactor of ammoxidation reaction | |
| EP3323485B1 (en) | Crystallization column and crystallization method | |
| CN104211020B (en) | The adjusting process of sulfuric acid apparatus production product diversification | |
| CN112441946B (en) | Production process of acrylonitrile device absorption tower | |
| US10645756B2 (en) | Heater, use thereof and method for preparing isocyanate using heater | |
| CN105017079B (en) | A kind of method preparing isocyanates in the presence of an inert solvent | |
| TWI706117B (en) | Improved ammonia removal from reactor effluent | |
| CN112439308A (en) | Method for removing acidic liquid in gas phase at top of quenching tower of acrylonitrile device | |
| CN207462975U (en) | A kind of desulfurization and denitrification integral equipment | |
| CN207462974U (en) | A kind of oil gas desulfurization dust removing integral equipment | |
| CN105983312A (en) | Water supplementing apparatus and water supplementing method for quench tower | |
| CN105214578A (en) | Gas-liquid reactor and gas-liquid reactor group | |
| CN105983322A (en) | Spraying equipment for neutralization reaction | |
| CN105983314A (en) | Automatic control device and method for amount of acid added into neutralization tower | |
| CN109052350A (en) | The continuous production method of phosphorus pentafluoride | |
| CN109173320A (en) | Hydrogen chloride industrial waste gas condensed absorbent recyclable device and system | |
| CN109056402A (en) | Continuous multi-stage drives sour displacement washing process | |
| CN202621158U (en) | Chlorination reaction device | |
| CN203764241U (en) | Reaction kettle for preparing chloroacetyl chloride | |
| CN103230725B (en) | A kind of scrubbing tower and preparation method thereof producing oxirane | |
| CN105983320A (en) | Water replenishing device of quench tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |