CN218478569U - Processing apparatus of recovery acetaldehyde - Google Patents
Processing apparatus of recovery acetaldehyde Download PDFInfo
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- CN218478569U CN218478569U CN202223095418.4U CN202223095418U CN218478569U CN 218478569 U CN218478569 U CN 218478569U CN 202223095418 U CN202223095418 U CN 202223095418U CN 218478569 U CN218478569 U CN 218478569U
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Abstract
The utility model belongs to the technical field of waste water treatment technique and specifically relates to a retrieve processing apparatus of acetaldehyde is related to, include: an acetaldehyde wastewater MVA removal system, an acetaldehyde absorption system and an acetaldehyde refining system; the acetaldehyde wastewater MVA removal system at least comprises: removing the MVA tower; the bottom of the MVA removal tower is connected with an acetaldehyde refining system through a pipeline; the top of the MVA removal tower is connected with an acetaldehyde absorption system through a pipeline. The utility model discloses can be with containing acetaldehyde recycle in the waste water, changing waste into valuables for production effectively improves industrial chemicals's utilization ratio, reduces the pollution to the environment, eliminates the potential safety hazard of existence, ensures the safety in production.
Description
Technical Field
The utility model belongs to the technical field of the acetaldehyde recovery technique and specifically relates to a retrieve processing apparatus of acetaldehyde.
Background
Chloroprene rubber (Neoprene), a synthetic rubber produced by alpha-polymerization of chloroprene as a main raw material, is widely used in weather-resistant products, adhesive soles, paints and rocket fuels.
At present, the technical routes of raw materials for synthesizing the chlorobutylene monomer used by domestic and foreign production enterprises mainly comprise two types: the acetylene dimerization process and the butadiene chlorination process are adopted. At present, acetylene dimerization is more industrially adopted, and the process takes acetylene as a raw material, acetylene gas is subjected to dimerization through a catalyst to synthesize vinyl acetylene (MVA), and then the vinyl acetylene and hydrogen chloride are reacted through the catalyst to prepare the chloroprene monomer. In the process of synthesizing vinyl acetylene, besides the main product of vinyl acetylene, a series of by-products, mainly acetaldehyde, divinyl acetylene (DVA) and the like, are generated.
The waste water produced in the production process of the chloroprene rubber mainly comprises acetylene gas purification waste water, vinyl acetylene washing waste water, CH phase water phase waste water, acetaldehyde tower washing waste water, chloroprene washing tower waste water, glue washing and chloroprene incineration flue gas washing water, and the acetaldehyde-containing waste water is directly sent to a sewage treatment plant for treatment, so that the sewage treatment difficulty and the sewage treatment cost are increased, the health of workers is influenced, potential safety hazards are formed, and the resource waste is greatly caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a retrieve processing apparatus of acetaldehyde, the device can retrieve the acetaldehyde in the waste water that produces in the chloroprene rubber production process.
The utility model provides a retrieve processing apparatus of acetaldehyde, it includes: an acetaldehyde wastewater removal MVA system, an acetaldehyde absorption system and an acetaldehyde refining system; the acetaldehyde wastewater MVA removal system at least comprises: removing the MVA tower; the bottom of the MVA removal tower is connected with an acetaldehyde refining system through a pipeline; the top of the MVA removal tower is connected with an acetaldehyde absorption system through a pipeline.
Preferably, the acetaldehyde wastewater MVA removal system comprises: an acetaldehyde water buffer tank, an acetaldehyde water feeding pump, a MVA removal tower and a MVA removal tower kettle discharge pump; the acetaldehyde water buffer tank is connected with an acetaldehyde water feeding pump through a pipeline; the acetaldehyde water feeding pump is connected with the MVA removal tower through a pipeline; the bottom of the MVA removing tower is connected with a pump at the bottom of the MVA removing tower through a pipeline.
Preferably, the acetaldehyde absorption system comprises: acetaldehyde absorption tower and acetaldehyde absorption tower kettle pump; the top outlet of the MVA removal tower is connected with the acetaldehyde absorption tower through a pipeline; the bottom of the acetaldehyde absorption tower is connected with an acetaldehyde absorption tower kettle pump through a pipeline; and the acetaldehyde absorption tower kettle pump is connected with the upper part of the MVA removal tower through a pipeline.
Preferably, the tail gas outlet of the acetaldehyde absorption tower is connected with a tail gas incineration device through a pipeline.
Preferably, the acetaldehyde purification system comprises: an acetaldehyde refining tower, an acetaldehyde refining tower reboiler, an acetaldehyde refining tower kettle outlet pump, an acetaldehyde refining tower condenser, an acetaldehyde refining tower reflux tank and an acetaldehyde refining tower distillation pump; the outlet pump of the MVA removal tower is connected with the acetaldehyde refining tower through a pipeline; the lower part of the acetaldehyde refining tower is connected with a reboiler of the acetaldehyde refining tower through a pipeline; the bottom of the acetaldehyde refining tower is connected with a kettle outlet pump of the acetaldehyde refining tower through a pipeline; an outlet at the top of the acetaldehyde refining tower is connected with an acetaldehyde refining tower condenser through a pipeline; the outlet of the acetaldehyde refining tower condenser is connected with the acetaldehyde refining tower reflux tank; the bottom of the return tank of the acetaldehyde refining tower is connected with a distillation pump of the acetaldehyde refining tower.
Preferably, the acetaldehyde refining system further comprises: the system comprises an acetaldehyde tank to be detected, an acetaldehyde delivery pump, an acetaldehyde storage tank tail gas liquid seal, an acetaldehyde emptying condenser, a sewage collection tank and a sewage pump; the acetaldehyde refining tower distillation pump is connected with the acetaldehyde tank to be detected through a pipeline; the bottom of the acetaldehyde tank to be detected is connected with an acetaldehyde delivery pump; the acetaldehyde conveying pump is connected with the upper part of the acetaldehyde refining tower through a pipeline; the acetaldehyde delivery pump is connected with the acetaldehyde storage tank through a pipeline; the upper part of the acetaldehyde storage tank is connected with an acetaldehyde emptying condenser through a pipeline; the upper part of the acetaldehyde emptying condenser is connected with tail gas liquid seal of an acetaldehyde storage tank through a pipeline; the lower part of the acetaldehyde emptying condenser is connected with the upper part of the acetaldehyde storage tank through a pipeline; the lower part of the tail gas liquid seal of the acetaldehyde storage tank is connected with the upper part of the sewage collection tank through a pipeline; the lower part of the sewage collecting tank is connected with a sewage pump through a pipeline.
Preferably, the acetaldehyde refining system further comprises: an acetaldehyde loading pump; the bottom of the acetaldehyde storage tank is connected with an acetaldehyde loading pump through a pipeline.
Preferably, the outlet of the acetaldehyde refining tower condenser is connected with a tail gas incineration device through a pipeline.
Preferably, the outlet pump of the acetaldehyde refining tower is connected with a wastewater treatment device through a pipeline.
Preferably, the outlet of the sewage pump is connected with the wastewater treatment device.
Has the advantages that:
the technical scheme of the utility model take off the acetaldehyde waste water and take off the acetaldehyde recycle in the waste water that MVA system, acetaldehyde absorption system and acetaldehyde refining system produced in the chloroprene rubber production process, changing waste into valuables for production effectively improves industrial chemicals's utilization ratio, reduces the pollution to the environment, eliminates the potential safety hazard of existence, ensures the safety in production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a treatment apparatus for recovering acetaldehyde according to the present invention;
description of reference numerals: 1-acetaldehyde water buffer tank; 2-acetaldehyde water charge pump; 3-removing the MVA tower; 4-removing a pump from the MVA tower kettle; a 5-acetaldehyde absorption column; 6-acetaldehyde absorption tower kettle pump; a 7-acetaldehyde refining column; 8-acetaldehyde refining tower reboiler; discharging the 9-acetaldehyde refining tower from a pump; a 10-acetaldehyde refining column condenser; a reflux tank of the 11-acetaldehyde refining tower; a 12-acetaldehyde refining column distillation pump; 13-acetaldehyde tank to be tested; a 14-acetaldehyde transfer pump; a 15-acetaldehyde storage tank; tail gas liquid seal of a 16-acetaldehyde storage tank; a 17-acetaldehyde vent condenser; 18-a sewage collection tank; 19-a sewage pump; 20-acetaldehyde truck-loading pump.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "coupled" are to be construed broadly and may include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present embodiment provides a processing apparatus for recovering acetaldehyde, which includes: an acetaldehyde water buffer tank 1, an acetaldehyde water feeding pump 2, a MVA removal tower 3, an MVA removal tower kettle discharge pump 4, an acetaldehyde absorption tower 5, an acetaldehyde absorption tower kettle pump 6, an acetaldehyde refining tower 7, an acetaldehyde refining tower reboiler 8, an acetaldehyde refining tower kettle discharge pump 9, an acetaldehyde refining tower condenser 10, an acetaldehyde refining tower reflux tank 11, an acetaldehyde refining tower distillation pump 12, an acetaldehyde to-be-detected tank 13, an acetaldehyde delivery pump 14, an acetaldehyde storage tank 15, an acetaldehyde storage tank tail gas liquid seal 16, an acetaldehyde emptying condenser 17, a sewage collection tank 18, a sewage pump 19 and an acetaldehyde loading pump 20; the acetaldehyde water buffer tank 1 is connected with an acetaldehyde water feeding pump 2 through a pipeline; the acetaldehyde water feeding pump 2 is connected with the MVA removal tower 3 through a pipeline; the bottom of the MVA removal tower 3 is connected with a MVA removal tower kettle discharge pump 4 through a pipeline; a discharging pump 4 of the MVA removal tower kettle is connected with an acetaldehyde refining tower 7 through a pipeline; an outlet at the top of the MVA removal tower 3 is connected with an acetaldehyde absorption tower 5 through a pipeline; the bottom of the acetaldehyde absorption tower 5 is connected with an acetaldehyde absorption tower kettle pump 6 through a pipeline; an acetaldehyde absorption tower kettle pump 6 is connected with the upper part of the MVA removal tower 3 through a pipeline; a tail gas outlet of the acetaldehyde absorption tower 5 is connected with a tail gas burning device through a pipeline; the lower part of the acetaldehyde refining tower 7 is connected with an acetaldehyde refining tower reboiler 8 through a pipeline; the bottom of the acetaldehyde refining tower 7 is connected with an acetaldehyde refining tower kettle outlet pump 9 through a pipeline; the acetaldehyde refining tower kettle outlet pump 9 is connected with a wastewater treatment device through a pipeline; an outlet at the top of the acetaldehyde refining tower 7 is connected with an acetaldehyde refining tower condenser 10 through a pipeline; the outlet of the acetaldehyde refining tower condenser 10 is connected with a tail gas burning device through a pipeline; the outlet of the acetaldehyde refining tower condenser 10 is connected with an acetaldehyde refining tower reflux tank 11; the bottom of the acetaldehyde refining tower reflux tank 11 is connected with an acetaldehyde refining tower distillation pump 12; an acetaldehyde refining distillation tower pump 12 is connected with an acetaldehyde to-be-detected tank 13 through a pipeline; the bottom of the acetaldehyde tank to be detected 13 is connected with an acetaldehyde delivery pump 14; an acetaldehyde conveying pump 14 is connected with the upper part of the acetaldehyde refining tower 7 through a pipeline; the acetaldehyde delivery pump 14 is connected with an acetaldehyde storage tank 15 through a pipeline; the bottom of the acetaldehyde storage tank 15 is connected with an acetaldehyde loading pump 20 through a pipeline; the upper part of the acetaldehyde storage tank 15 is connected with an acetaldehyde emptying condenser 17 through a pipeline; the upper part of the acetaldehyde emptying condenser 17 is connected with an acetaldehyde storage tank tail gas liquid seal 16 through a pipeline; the lower part of the acetaldehyde emptying condenser 17 is connected with the upper part of the acetaldehyde storage tank 15 through a pipeline; the lower part of a tail gas liquid seal 16 of the acetaldehyde storage tank is connected with the upper part of a sewage collecting tank 18 through a pipeline; the lower part of the sewage collecting tank 18 is connected with a sewage pump 19 through a pipeline, and the outlet of the sewage pump 19 is connected to a wastewater treatment device.
The working flow of this embodiment is:
1. acetaldehyde waste water takes off MVA system
Acetaldehyde waste water sent by a rubber plant is buffered by an acetaldehyde water buffer tank 1 and then is pumped to the top of an MVA (multi-component absorption) removal tower 3 by an acetaldehyde water feeding pump 2, and the feeding flow of the acetaldehyde waste water is controlled by a regulating valve flowmeter; in order to ensure the safety, a stream of nitrogen is added into the tower top, a certain adding amount is controlled by a flow meter regulating valve, and the nitrogen and a small amount of acetaldehyde and MVA gas removed from the tower top are removed to an acetaldehyde absorption tower 5. Directly heating the tower kettle of the MVA removal tower 3 by introducing water vapor, controlling the flow of the water vapor by a regulating valve flowmeter, pumping the kettle effluent to an acetaldehyde refining tower 7 by a MVA removal tower kettle effluent pump 4, and controlling a certain tower liquid level by the tower kettle effluent regulating valve.
2. Acetaldehyde absorption system
The gas phase from the tower top of the MVA removal tower 3 directly enters the tower kettle of the acetaldehyde absorption tower 5, deoxygenated water is added from the tower top after a certain addition amount is controlled by a regulating valve flowmeter, the deoxygenated water and the gas from the tower top of the MVA removal tower 3 are subjected to countercurrent contact absorption in the tower, the absorption is a heat release process, and heat is removed through a cooler in the middle of the tower. Nitrogen and a small amount of MVA gas phase which are not absorbed at the top of the acetaldehyde absorption tower 5 are controlled by a tail gas regulating valve to be subjected to certain tower pressure, then a tail gas main pipe is removed, tower kettle liquid is conveyed to the top of the MVA removal tower 3 through an acetaldehyde absorption tower kettle pump 6, and tower kettle liquid level is controlled through a kettle liquid outlet regulating valve.
3. Acetaldehyde refining system
The kettle effluent after MVA removal by the MVA removal tower 3 is pressurized by a kettle pump 4 of the MVA removal tower and pumped to an acetaldehyde refining tower 7 for recovering acetaldehyde. Intermittently extracting DVA from a side line liquid phase, and treating the side extracted liquid for wastewater; condensing a gas phase at the top of the tower by an acetaldehyde refining tower condenser 10, diluting non-condensable gas by nitrogen, mixing the diluted non-condensable gas with a gas phase from the top of an acetaldehyde absorption tower 5 and a gas phase from an acetaldehyde storage tank tail gas liquid seal 16, and then removing the gas phase to a tail gas incineration device, feeding a condensate into an acetaldehyde refining tower reflux tank 11 in an overflow mode, pressurizing liquid in the acetaldehyde refining tower reflux tank 11 by an acetaldehyde refining tower distillation pump 12, refluxing a part of the liquid, extracting a part of the liquid to a tank to be detected for acetaldehyde, controlling the reflux flow by a reflux flowmeter regulating valve, and controlling the liquid level of the acetaldehyde refining tower reflux tank 11 by a distillation regulating valve; a reflux tank 11 of the acetaldehyde refining tower is provided with a nitrogen seal to ensure micro-positive pressure, and tail gas of the reflux tank is condensed by a condenser 10 of the acetaldehyde refining tower. The tower bottom liquid of the acetaldehyde refining tower 7 is pressurized and sent to a sewage treatment plant through a tower bottom outlet pump 9 of the acetaldehyde refining tower, and the tower bottom liquid level is controlled through a bottom liquid outlet regulating valve.
After the liquid in the acetaldehyde tank to be detected 13 is qualified, the liquid is conveyed to an acetaldehyde storage tank 15 by an acetaldehyde conveying pump 14 to be stored for sale; if the acetaldehyde is unqualified, the acetaldehyde is pressurized by an acetaldehyde delivery pump 14, and the acetaldehyde is added into the acetaldehyde refining tower 7 for re-rectification after a certain flow is controlled by a regulating valve flowmeter. The acetaldehyde storage tank 15 is internally provided with a cooler, the outside of the acetaldehyde storage tank is provided with a clamp matching cover, and the cooler and the clamp matching cover are filled with frozen brine for cooling and cold insulation. Safety nitrogen is introduced into the acetaldehyde storage tank 15, the introduction amount of the nitrogen is controlled by a flow meter regulating valve, tail gas of the acetaldehyde storage tank 15 enters an acetaldehyde emptying condenser 17, chilled brine is introduced into the acetaldehyde emptying condenser 17, condensate returns into the acetaldehyde storage tank 15, and non-condensable gas passes through an acetaldehyde storage tank tail gas liquid seal 16 and then is removed from a tail gas main pipe to enter an incineration device.
Further, install first pressure gauge, first teletransmission liquid level display, first liquid level control valve on the acetaldehyde water buffer tank 1. A first pressure gauge monitors the pressure of the acetaldehyde water buffer tank 1; the first remote liquid level display detects the liquid level of the acetaldehyde water buffer tank 1, and the first remote liquid level display is interlocked with the first liquid level regulating valve to control the liquid level of the acetaldehyde water buffer tank 1.
Furthermore, a second flow meter, a second flow regulating valve and a fourth remote temperature display are arranged at an outlet pipe of the acetaldehyde water feeding pump 2. The second flowmeter detects the feeding flow of the acetaldehyde wastewater into the MVA removing tower 3, is associated with the second flow regulating valve and controls the feeding flow; and the fourth remote temperature display detects the temperature of the acetaldehyde wastewater.
Furthermore, a second pressure gauge, a first remote transmission temperature display, a second remote transmission temperature display, a third remote transmission temperature display, a second remote transmission liquid level display, a first flowmeter, a third flowmeter, a first flow regulating valve, a third flow regulating valve and a first explosion-proof membrane are arranged on the off-MVA tower 3. A second pressure gauge monitors the tower top pressure of the MVA removal tower 3; the temperatures of the lower part, the middle part and the upper part of the MVA removal tower 3 are monitored by a first remote transmission temperature display, a second remote transmission temperature display and a third remote transmission temperature display; the first flow meter monitors the flow of nitrogen introduced into the MVA removal tower 3, is associated with a first flow regulating valve and controls the introduction amount of the nitrogen; monitoring the steam flow directly introduced into the tower kettle 3 of the MVA removal tower by a third flow meter, and associating the steam flow with a third flow regulating valve to control the steam flow; the second remote liquid level display monitors the liquid level of the tower kettle of the MVA removal tower 3, is associated with a second flow regulating valve and controls the liquid level of the tower kettle; when the pressure at the top of the MVA-removing tower 3 is ultrahigh, the first explosion-proof membrane is exploded to release the pressure, and the safety of the system is ensured.
Furthermore, a fourth flowmeter and a second liquid level regulating valve are arranged at an outlet pipe of the pump 4 of the MVA removal tower kettle. A fourth flowmeter detects the outlet flow of the pump 4 of the MVA removal tower kettle; and the second liquid level regulating valve is associated with the second remote transmission liquid level display to control the liquid level of the MVA removal tower 3.
Furthermore, the acetaldehyde absorption tower 5 is provided with a fourth remote temperature display, a fifth remote temperature display, a sixth remote temperature display, a third pressure gauge, a fourth pressure gauge, a third remote liquid level display, a third pressure regulating valve, a second rupture membrane, a first emptying flame arrester and a second tail gas removing burning device flame arrester. The fourth remote transmission temperature display, the fifth remote transmission temperature display and the sixth remote transmission temperature display monitor the temperatures of the lower part, the middle part and the upper part of the acetaldehyde absorption tower 5; the third pressure gauge monitors the pressure of the acetaldehyde absorption tower 5, is associated with a third pressure regulating valve, and increases the flow of the tail gas removal incineration device when the pressure is too high to control the pressure of the acetaldehyde absorption tower 5; when the pressure is out of control, the second explosion-proof membrane is exploded to release the pressure, so that the safety is ensured; a fourth pressure gauge detects the pressure of the acetaldehyde absorption tower 5; the third remote liquid level display is associated with a third liquid level regulating valve and controls the liquid level of the acetaldehyde absorption tower 5.
Further, a third liquid level regulating valve is arranged at an outlet pipe of the acetaldehyde absorption tower kettle pump 6. And the third liquid level regulating valve is associated with the third remote liquid level display to control the liquid level of the acetaldehyde absorption tower 5.
Further, a fourth remote transmission liquid level display, a seventh remote transmission temperature display, an eighth remote transmission temperature display, a ninth remote transmission temperature display, a tenth remote transmission temperature display, a fifth pressure gauge and a side-sampling organic matter wastewater interface are installed on the acetaldehyde refining tower 7. The fourth remote liquid level display is associated with a fourth liquid level regulating valve to control the liquid level of the acetaldehyde refining tower 7; seventh remote transmission temperature display, ninth remote transmission temperature display and tenth remote transmission temperature display are used for detecting the temperatures of the lower part, the middle part and the upper part of the tower; the eighth remote temperature display is associated with an eighth temperature regulating valve to control the temperature in the middle of the tower; monitoring and alarming the pressure of the tower kettle of the fifth pressure gauge; and a side-sampling organic matter wastewater interface, intermittently extracting DVA from a side-stream liquid phase, and treating the side-sampling liquid to wastewater.
Further, a sixth flow meter and an eighth temperature control valve are installed on the acetaldehyde refining column reboiler 8. A sixth flow meter monitors the heating steam flow of the acetaldehyde refining tower reboiler 8; and the eighth temperature regulating valve is associated with the eighth remote temperature display to control the temperature of the middle part of the acetaldehyde refining tower 7.
Further, a fourth liquid level regulating valve and an eighth flowmeter are arranged at an outlet pipe of a pump 9 of the acetaldehyde refining tower kettle. Detecting the flow of wastewater from a wastewater treatment plant by an eighth flowmeter; and the fourth liquid level regulating valve is associated with the fourth remote liquid level display to control the liquid level of the acetaldehyde refining tower 7.
Further, an eleventh remote temperature display, a twelfth temperature regulating valve, a third flame arrester, a remote manual control of the tail gas removing incineration device, a first manual exhaust valve, a fourth flame arrester, a fifth flame arrester, a ninth nitrogen flow meter and a ninth flow regulating valve are arranged on the acetaldehyde refining tower condenser 10. Eleventh remote temperature display detects the tail gas temperature of the tail gas removing incineration device; the tail gas removing incineration device is remotely and manually controlled, and the first manual exhaust valve is remotely and manually controlled to control an emptying valve of the tail gas removing incineration device; the third flame arrester, the fourth flame arrester and the fifth flame arrester block the back fire of the tail gas burning device, so that the safety is ensured; the twelfth remote temperature display is associated with a twelfth temperature regulating valve to control the condensation temperature of the acetaldehyde refining tower condenser 10; and the ninth nitrogen flow meter and the ninth flow regulating valve are associated to control the flow of the protective nitrogen.
Further, a thirteenth remote transmission temperature display device, a sixth pressure gauge, a fifth pressure regulating valve, a sixth pressure regulating valve, a fifth remote transmission liquid level display device and a sixth flame arrester are arranged on the return tank of the acetaldehyde refining tower 11. Thirteenth remote temperature display detects the temperature of the return tank 11 of the acetaldehyde refining tower; the sixth pressure gauge, the fifth pressure regulating valve and the sixth pressure regulating valve are associated, and the micro-positive pressure of the reflux tank is maintained to form nitrogen seal protection; the fifth remote transmission liquid level display is associated with a fifth liquid level regulating valve and used for controlling the liquid level of the return tank 11 of the acetaldehyde refining tower; sixth flame arrester tail gas removes acetaldehyde refining tower condenser 10 flame arrester.
Furthermore, a fifth liquid level regulating valve, a seventh flow meter, a tenth flow meter and a seventh flow regulating valve are arranged at an outlet pipe of the acetaldehyde refining tower distillation pump 12. A fifth liquid level regulating valve is associated with fifth remote liquid level display to control the liquid level of a reflux tank of the acetaldehyde refining tower 11; the seventh flowmeter is associated with the seventh flow regulating valve and used for controlling the reflux quantity; and detecting the acetaldehyde flow of the kettle effluent by a tenth flow meter.
Further, a fourteenth remote temperature display, a seventh pressure gauge, a seventh pressure regulating valve, an eighth pressure regulating valve and a sixth remote liquid level display are mounted on the acetaldehyde tank to be detected 13. The fourteenth remote temperature display is used for detecting the temperature of the jacket; the seventh pressure gauge is connected with the seventh pressure regulating valve, the pressure of the acetaldehyde tank to be detected 13 is controlled, the micro-positive pressure of the acetaldehyde tank to be detected is maintained, and nitrogen seal protection is formed; the sixth remote liquid level display is used for monitoring the liquid level of the acetaldehyde tank to be detected 13.
Further, an outlet pipe of the acetaldehyde conveying pump 14 is provided with an eighth liquid level regulating valve, an interface of the acetaldehyde refining tower 7 for returning unqualified materials, a fifth flow meter and a fifth flow regulating valve.
The eighth liquid level regulating valve is associated with the eighth remote transmission liquid level display to control the liquid level of the acetaldehyde storage tank 15; and the fifth flowmeter is associated with the fifth flow regulating valve to control the flow of the unqualified material returned to the acetaldehyde removal refining tower 7.
Further, a sixteenth remote temperature display, an eighth pressure gauge, an eighth remote liquid level display, a first breather valve, a third rupture membrane, a frozen water upper and lower water pipe and a nitrogen pipe are arranged on the acetaldehyde storage tank 15. Sixteenth remote temperature display is used for detecting and alarming the temperature of the acetaldehyde storage tank 15; the eighth remote transmission liquid level display is used for detecting and alarming the pressure of the storage tank; the eighth pressure gauge is used for detecting the pressure of the liquid level of the storage tank; the pressure of the third rupture membrane storage tank is relieved when exceeding the standard and protected; the water and the water on the frozen water keep the storage tank at low temperature.
Further, a seventh flame arrester, a primary water replenishing pipe and a steam condensate water feeding and discharging pipe are arranged on the tail gas liquid seal 16 of the acetaldehyde storage tank.
Further, a tail gas removing main pipe is arranged on the acetaldehyde emptying condenser 17, and a ninth flame arrester and a freezing water upper and lower water pipe are arranged on the acetaldehyde emptying condenser.
Further, a sixth remote temperature display, a ninth pressure gauge, an eighth remote liquid level display and a ninth flame arrester are installed on the sewage collecting tank 18.
Further, the sewage pump 19 exits the pipeline to a sewage treatment plant.
In conclusion, in the embodiment, acetaldehyde-containing wastewater from the production process of chloroprene rubber enters the MVA removal tower by controlling a certain flow rate through the acetaldehyde water feeding pump, the wastewater is heated by steam at the bottom of the MVA removal tower, and MVA and part of acetaldehyde are gasified and enter the acetaldehyde absorption tower. And deoxygenated water is sprayed into the top of the acetaldehyde absorption tower, rising acetaldehyde gas is leached and absorbed and then enters the bottom of the tower, and unabsorbed MVA enters a tail gas pipe and is conveyed to an incineration station for treatment. Acetaldehyde solution at the bottom of the kettle enters an acetaldehyde refining tower, acetaldehyde is rectified out from the top of the tower to enter a tank to be detected, and after being qualified, the acetaldehyde is conveyed to an irrigation area by a pump to be sold, so that the acetaldehyde in the wastewater can be recycled, waste is changed into valuable, the acetaldehyde purification tower is used for production, the utilization rate of chemical raw materials is effectively improved, the pollution to the environment is reduced, potential safety hazards in existence are eliminated, and safety production is ensured.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (10)
1. A treatment apparatus for recovering acetaldehyde, comprising: an acetaldehyde wastewater MVA removal system, an acetaldehyde absorption system and an acetaldehyde refining system; the acetaldehyde wastewater MVA removal system at least comprises: a MVA removal tower (3); the bottom of the MVA removal tower (3) is connected with an acetaldehyde refining system through a pipeline; the top of the MVA removal tower (3) is connected with an acetaldehyde absorption system through a pipeline.
2. The treatment plant for recovering acetaldehyde of claim 1, wherein the acetaldehyde waste water elimination-MVA system comprises: an acetaldehyde water buffer tank (1), an acetaldehyde water feeding pump (2), a MVA removal tower (3) and a MVA removal tower kettle discharge pump (4); the acetaldehyde water buffer tank (1) is connected with an acetaldehyde water feeding pump (2) through a pipeline; the acetaldehyde water feeding pump (2) is connected with the MVA removal tower (3) through a pipeline; the bottom of the MVA removing tower (3) is connected with a pump (4) at the bottom of the MVA removing tower through a pipeline.
3. The process arrangement for recovery of acetaldehyde as in claim 2, wherein the acetaldehyde absorption system comprises: an acetaldehyde absorption tower (5) and an acetaldehyde absorption tower kettle pump (6); an outlet at the top of the MVA removal tower (3) is connected with the acetaldehyde absorption tower (5) through a pipeline; the bottom of the acetaldehyde absorption tower (5) is connected with an acetaldehyde absorption tower kettle pump (6) through a pipeline; and the acetaldehyde absorption tower kettle pump (6) is connected with the upper part of the MVA removal tower (3) through a pipeline.
4. The processing plant for recovering acetaldehyde according to claim 3, wherein the tail gas outlet of the acetaldehyde absorption column (5) is connected to a tail gas incineration plant through a pipeline.
5. The apparatus of claim 4, wherein the acetaldehyde refining system comprises: an acetaldehyde refining tower (7), an acetaldehyde refining tower reboiler (8), an acetaldehyde refining tower kettle discharge pump (9), an acetaldehyde refining tower condenser (10), an acetaldehyde refining tower reflux tank (11) and an acetaldehyde refining tower distillation pump (12); the outlet pump (4) of the MVA removal tower kettle is connected with the acetaldehyde refining tower (7) through a pipeline; the lower part of the acetaldehyde refining tower (7) is connected with an acetaldehyde refining tower reboiler (8) through a pipeline; the bottom of the acetaldehyde refining tower (7) is connected with an acetaldehyde refining tower kettle discharge pump (9) through a pipeline; an outlet at the top of the acetaldehyde refining tower (7) is connected with an acetaldehyde refining tower condenser (10) through a pipeline; the outlet of the acetaldehyde refining tower condenser (10) is connected with the acetaldehyde refining tower reflux tank (11); the bottom of the acetaldehyde refining tower reflux tank (11) is connected with an acetaldehyde refining tower distillation pump (12).
6. The process plant for recovering acetaldehyde of claim 5, wherein the acetaldehyde refining system further comprises: an acetaldehyde detection tank (13), an acetaldehyde delivery pump (14), an acetaldehyde storage tank (15), an acetaldehyde storage tank tail gas liquid seal (16), an acetaldehyde emptying condenser (17), a sewage collection tank (18) and a sewage pump (19); the acetaldehyde refining tower distillation pump (12) is connected with an acetaldehyde to-be-detected tank (13) through a pipeline; the bottom of the acetaldehyde tank to be detected (13) is connected with an acetaldehyde delivery pump (14); the acetaldehyde conveying pump (14) is connected with the upper part of the acetaldehyde refining tower (7) through a pipeline; the acetaldehyde delivery pump (14) is connected with an acetaldehyde storage tank (15) through a pipeline; the upper part of the acetaldehyde storage tank (15) is connected with an acetaldehyde emptying condenser (17) through a pipeline; the upper part of the acetaldehyde emptying condenser (17) is connected with a tail gas liquid seal (16) of an acetaldehyde storage tank through a pipeline; the lower part of the acetaldehyde emptying condenser (17) is connected with the upper part of the acetaldehyde storage tank (15) through a pipeline; the lower part of the tail gas liquid seal (16) of the acetaldehyde storage tank is connected with the upper part of a sewage collecting tank (18) through a pipeline; the lower part of the sewage collecting tank (18) is connected with a sewage pump (19) through a pipeline.
7. The process arrangement for recovering acetaldehyde of claim 6, wherein the acetaldehyde refining system further comprises: an acetaldehyde loading pump (20); the bottom of the acetaldehyde storage tank (15) is connected with an acetaldehyde loading pump (20) through a pipeline.
8. The processing plant for recovering acetaldehyde of claim 6, wherein the outlet of the acetaldehyde refining column condenser (10) is connected to a tail gas incineration plant through a pipe.
9. The treatment apparatus for recovering acetaldehyde according to claim 6, wherein the acetaldehyde refining column still bottom outlet pump (9) is connected to a wastewater treatment apparatus through a pipe.
10. A treatment plant for recovering acetaldehyde as claimed in claim 9, wherein the outlet of the sewage pump (19) is connected to the wastewater treatment plant.
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| CN202223095418.4U CN218478569U (en) | 2022-11-22 | 2022-11-22 | Processing apparatus of recovery acetaldehyde |
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| CN202223095418.4U CN218478569U (en) | 2022-11-22 | 2022-11-22 | Processing apparatus of recovery acetaldehyde |
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