CN218834070U - Glycine production tail gas processing apparatus - Google Patents
Glycine production tail gas processing apparatus Download PDFInfo
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- CN218834070U CN218834070U CN202223144401.3U CN202223144401U CN218834070U CN 218834070 U CN218834070 U CN 218834070U CN 202223144401 U CN202223144401 U CN 202223144401U CN 218834070 U CN218834070 U CN 218834070U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application relates to a glycine tail gas treatment device, which comprises a first water washing tower, a distillation tower, an evaporator, a second water washing tower and a cyclone separator, wherein the first water washing tower is connected with a chloroacetic acid head tank through a first connecting pipeline, an ammonolysis kettle is connected with the first water washing tower through a second connecting pipeline, a feed inlet of the distillation tower is connected with a mother liquor pool of an alcohol precipitation kettle, a liquid outlet of the distillation tower is connected with the second water washing tower, the evaporator is connected with the distillation tower through a connecting pipeline, the evaporator is arranged at the top of a drying box, a feed inlet of the cyclone separator is connected with the drying box, and a discharge outlet of the cyclone separator is connected with the second water washing tower; the discharge gate of first washing tower and second washing tower is connected the exhaust duct. The application provides a glycine tail gas processing apparatus realizes absorbing the processing to the hierarchical tail gas of a plurality of production processes of glycine, and the tail gas after handling reaches environmental protection emission standard, utilizes the heat of drying cabinet to carry out the evaporation heat to the evaporimeter and supplyes simultaneously, plays energy-concerving and environment-protective effect.
Description
Technical Field
The application relates to the technical field of tail gas treatment, in particular to a glycine production tail gas treatment device.
Background
Glycine, also known as glycine, is a non-essential amino acid, belongs to sweet amino acids, has unique cool sweet taste, and is widely applied to the fields of medicines, foods, feeds, electroplating, organic matter synthesis and the like.
The currently common glycine synthesis method is a chloroacetic acid ammonolysis method, gases such as HCl, ammonia gas and methanol are generated in the process of producing glycine by the chloroacetic acid ammonolysis method, and if the gases are directly discharged, the atmospheric environment pollution is caused, and the body health of surrounding residents is affected, so that the waste gas generated in the production of glycine needs to be treated to reach the environmental protection discharge standard and then discharged.
Disclosure of Invention
The embodiment of the application provides a glycine production tail gas processing apparatus to solve the technical problem that the waste gas that glycine production produced among the correlation technique does not accord with environmental protection emission standard.
In a first aspect, the glycine production device comprises a chloroacetic acid elevated tank, an ammonolysis kettle, an alcohol precipitation kettle, a centrifugal device and a drying box which are sequentially connected, wherein the ammonolysis kettle is connected with a liquid ammonia storage tank; the discharge hole of the first water scrubber and the discharge hole of the second water scrubber are connected with an exhaust pipeline.
In some embodiments, a plate condenser is connected between the chloroacetic acid head tank and the first water washing tower.
In some embodiments, the discharge ports of the first water scrubber and the second water scrubber are connected to a tail gas detection device through an exhaust pipeline.
In some embodiments, a water seal is arranged on a connecting pipeline between the cyclone separator and the second water washing tower.
In some embodiments, the exhaust pipeline is connected with a variable frequency fan.
In some embodiments, the connection pipeline between the cyclone separator and the second washing tower comprises a first pipeline section and a second pipeline section, the discharge port of the first pipeline section is located below the water surface of the water seal, and the feed port of the second pipeline section is located above the water surface of the water seal.
In some embodiments, the evaporator is fixed on the top of the drying box through a bracket, and a gap is formed between the bottom of the evaporator and the drying box.
In some embodiments, a water-stop plate is arranged on the top of the drying box, and the evaporator is arranged on the water-stop plate.
In some embodiments, the first water scrubber and the second water scrubber are both multistage series water scrubbers.
In some embodiments, the second water scrubber rear section is connected with the alkaline washing tank and the activated carbon adsorption tank in sequence.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a glycine production tail gas treatment device, chloroacetic acid in a chloroacetic acid head tank is recovered through a first washing tower to prepare and produce hydrochloric acid, acetic acid and sulfur dioxide, unreacted ammonia in an ammonolysis kettle is connected into the first washing tower through a second connecting pipeline and reacts with hydrochloric acid in the first washing tower to generate ammonium chloride, methanol in an alcohol precipitation mother solution is separated through distillation of a distillation tower and is absorbed by a second washing tower, trace methanol is generated through drying of a drying box, a cyclone separator separates methanol gas and is absorbed by the second washing tower, graded tail gas absorption treatment of multiple production procedures in glycine production is realized, and the treated tail gas reaches an environment-friendly emission standard; and the evaporator is arranged at the top of the drying box, so that the waste heat of the drying box is fully utilized, and the effects of energy conservation and environmental protection are achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a glycine production tail gas treatment device provided in an embodiment of the present application.
In the figure: 1. a chloroacetic acid elevated tank; 11. a plate condenser; 12. a first water washing tower; 2. an ammonolysis kettle; 21. a second connecting line; 3. an alcohol precipitation kettle; 31. a mother liquor pool; 32. a distillation column; 33. an evaporator; 34. a second water wash column; 4. a centrifugal device; 5. a drying oven; 51. a cyclone separator; 52. water sealing; 6. tail gas detection device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.
Harmful gases such as ammonia gas, methanol and the like can be generated in the process of preparing glycine by aminolysis of glycine, and air can be polluted if the harmful gases are directly discharged, so that tail gas in the production of glycine needs to be treated.
In view of this, the embodiment of the application provides a glycine tail gas processing apparatus, which can solve the problem that the tail gas produced in the glycine production process does not meet the environmental protection emission standard.
The glycine production process comprises the steps of ammonolysis and alcohol precipitation, specifically, the glycine production device comprises a chloroacetic acid head tank 1, an ammonolysis kettle 2, an alcohol precipitation kettle 3, a centrifugal device 4 and a drying box 5, chloroacetic acid generated by catalytic reaction of chlorine gas and acetic acid through sulfur dioxide is arranged in the chloroacetic acid head tank 1, the ammonolysis kettle 2 is connected with the chloroacetic acid head tank 1 and a liquid ammonia storage tank, chloroacetic acid and ammonia gas are subjected to ammonolysis reaction in the chloroacetic acid head tank to produce an aqueous solution of glycine, ammonium chloride and urotropine, the aqueous solution is connected into the alcohol precipitation kettle 3 through a connecting water pipe, the alcohol precipitation kettle 3 is subjected to alcohol precipitation through a methanol solution, the glycine is dissolved in water and slightly dissolved in methanol, the ammonium chloride and the urotropine are dissolved in methanol, the salted-out glycine is precipitated from the aqueous solution, the salted-out crystal is separated from the methanol, the ammonium chloride and the like, and the precipitated glycine is dried and dehydrated to obtain a glycine product.
Referring to fig. 1, the present application provides a glycine tail gas treatment apparatus, including a first water scrubber 12, a distillation tower 32, an evaporator 33, a second water scrubber 34, and a cyclone 51, where the first water scrubber 12 is connected to the chloroacetic acid head tank 1 through a first connecting pipeline, the first water scrubber 12 is used to recover HCl and acetic acid in a chloroacetic acid kettle, the ammonolysis kettle 2 is connected to the first water scrubber 12 through a second connecting pipeline 21, ammonia gas which is not completely reacted is introduced into the first water scrubber 12 to react with HCl therein to produce ammonium chloride, and an absorption liquid absorbs HCl to achieve a reabsorption effect on ammonia gas, so as to fully utilize the absorption liquid in the first water scrubber 12; the feed inlet of the distillation tower 32 is connected with the mother liquor pool 31 of the alcohol precipitation kettle 3, methanol and ammonium chloride mother liquor after alcohol precipitation reaction is introduced into the mother liquor pool 31, the methanol and ammonium chloride mother liquor is distilled in the distillation tower 32 to obtain separated methanol and ammonium chloride aqueous solution, the liquid outlet of the distillation tower 32 is connected with the second washing tower 34, the evaporator 33 is connected with the distillation tower 32 through a connecting pipeline, the evaporator 33 is arranged at the top of the drying box 5 and used for evaporating and dehydrating the ammonium chloride solution to obtain ammonium chloride, the feed inlet of the cyclone separator is connected with the drying box 5, and the discharge outlet of the cyclone separator is connected with the second washing tower 34 and used for separating methanol generated after drying; the discharge ports of the first water scrubber 12 and the second water scrubber 34 are connected with an exhaust pipeline.
In an embodiment, a plate condenser 11 is connected between the chloroacetic acid head tank 1 and the first water scrubber 12, and the plate condenser 11 is configured to reduce a temperature of a tail gas at a discharge port in the chloroacetic acid head tank 1, so as to increase an absorption rate of HCl in the first water scrubber 12.
In an embodiment, the discharge ports of the first water scrubber 12 and the second water scrubber 34 are connected to the tail gas detection device 6 through an exhaust pipeline, and the tail gas detection device 6 is configured to detect components of the tail gas after absorption treatment by the first water scrubber 12 and the second water scrubber 34, as a basis for determining whether the tail gas meets the tail gas emission standard.
In an alternative embodiment of the present application, the exhaust pipe connected to the first water scrubber 12 and the exhaust pipe connected to the second water scrubber 34 are not collected to the same exhaust gas detection device, but are respectively connected to an exhaust gas detection device, so as to implement differential detection and adjustment of the exhaust gas treatment effects of the exhaust gas treatment devices at different levels.
In an embodiment, a water seal 52 is disposed on a connection pipeline between the cyclone separator 51 and the second water washing tower 34, and the water seal 52 is used for isolating gas on two sides thereof and absorbing water vapor generated by drying glycine to make up for entering the second water washing tower 34.
In one embodiment, the exhaust pipeline is connected with a variable frequency fan for directionally extracting the tail gas and improving the exhaust rate.
In an embodiment, the connection pipeline between the cyclone separator 51 and the second water scrubber 34 includes a first pipeline section and a second pipeline section, the discharge port of the first pipeline section is located below the water surface of the water seal 52, the feed port of the second pipeline section is located above the water surface of the water seal 52, and water in the water seal 52 is used for absorbing trace methanol after drying glycine and isolating gas at two sides.
In one embodiment, in order to prevent the solution in the evaporator from volatilizing and affecting the normal operation of the circuit of the drying oven, and prevent the volatilized moisture from entering the exterior or interior of the drying oven, the evaporator and the drying oven can be physically isolated.
In an embodiment, the evaporator 33 is supported at the top of the drying box 5 through a bracket, and a certain isolation gap is formed between the bottom of the evaporator and the drying box, so that the physical isolation between the evaporator and the drying box can be realized, and the utilization of the residual heat at the top of the drying box can be realized.
In an embodiment, the evaporator 33 can be movably supported on the top of the drying box 5 by a movable support, so as to facilitate the operation of an operator.
In an embodiment, a water-stop sheet is disposed on the top of the drying oven 5, and the evaporator 33 is disposed on the water-stop sheet, and the water-stop sheet has heat-conducting and waterproof properties.
In a more specific embodiment, the water-stop sheet is a steel sheet, and the main surface area of the steel sheet is larger than that of the top cover of the drying oven, so that the water-stop sheet is arranged on the top of the drying oven to isolate water vapor formed by evaporation of the evaporator and prevent the water vapor from influencing the normal operation of the drying oven 5.
In an embodiment, the first water scrubber 12 is a multi-stage water scrubber connected in series to increase the absorption rate of HCl and acetic acid in the chloroacetic acid kettle; the second water scrubber 34 is a multistage water scrubber connected in series to increase the absorption rate of methanol generated after separation and drying.
In one embodiment, the rear section of the second water scrubber is sequentially connected with an alkaline washing tank and an activated carbon adsorption tank to enhance the absorption effect of the second water scrubber on tail gas, so that the second water scrubber reaches the environmental protection emission standard.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; 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 application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A glycine production tail gas treatment device, a glycine production device comprises a chloroacetic acid elevated tank, an ammonolysis kettle, an alcohol precipitation kettle, a centrifugal device and a drying box which are connected in sequence, the ammonolysis kettle is connected with a liquid ammonia storage tank, the device is characterized in that,
glycine production tail gas processing apparatus includes:
the device comprises a first washing tower, a distillation tower, an evaporator, a second washing tower and a cyclone separator, wherein the first washing tower is connected with a chloroacetic acid head tank through a first connecting pipeline, an ammonolysis kettle is connected with the first washing tower through a second connecting pipeline, a feed inlet of the distillation tower is connected with a mother liquor pool of an alcohol precipitation kettle, a liquid outlet of the distillation tower is connected with the second washing tower, the evaporator is connected with the distillation tower through a connecting pipeline, the evaporator is arranged at the top of a drying box, a feed inlet of the cyclone separator is connected with the drying box, and a discharge outlet of the cyclone separator is connected with the second washing tower;
the discharge ports of the first water washing tower and the second water washing tower are connected with an exhaust pipeline.
2. The glycine production tail gas treatment device as claimed in claim 1, wherein a plate condenser is connected between the chloroacetic acid head tank and the first water scrubber.
3. The glycine production tail gas treatment device, as claimed in claim 1, wherein the discharge port of the first water scrubber and the discharge port of the second water scrubber are both connected to a tail gas detection device via an exhaust pipeline.
4. The glycine production tail gas treatment device as claimed in claim 1, wherein a water seal is arranged on a connecting pipeline between the cyclone separator and the second water washing tower.
5. The glycine production tail gas treatment device as claimed in claim 4, wherein the connection pipeline between the cyclone separator and the second washing tower comprises a first pipeline section and a second pipeline section, the discharge port of the first pipeline section is located below the water surface of the water seal, and the feed port of the second pipeline section is located above the water surface of the water seal.
6. The glycine production tail gas treatment device as claimed in claim 1, wherein a variable frequency fan is connected to the exhaust pipeline.
7. The glycine production tail gas treatment device according to claim 1, wherein the evaporator is fixed on the top of the drying oven through a bracket, and a gap is formed between the bottom of the evaporator and the drying oven.
8. The glycine production tail gas treatment device as claimed in claim 1, wherein a water-stop sheet is arranged on the top of the drying oven, and the evaporator is arranged on the water-stop sheet.
9. The glycine production tail gas treatment device, according to claim 1, characterized in that the first water scrubber and the second water scrubber are both multistage series water scrubbers.
10. The glycine production tail gas treatment device as claimed in claim 1, wherein the second water scrubber rear section is connected with an alkaline washing tank and an activated carbon adsorption tank in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223144401.3U CN218834070U (en) | 2022-11-25 | 2022-11-25 | Glycine production tail gas processing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223144401.3U CN218834070U (en) | 2022-11-25 | 2022-11-25 | Glycine production tail gas processing apparatus |
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| Publication Number | Publication Date |
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| CN218834070U true CN218834070U (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223144401.3U Active CN218834070U (en) | 2022-11-25 | 2022-11-25 | Glycine production tail gas processing apparatus |
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| CN (1) | CN218834070U (en) |
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- 2022-11-25 CN CN202223144401.3U patent/CN218834070U/en active Active
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