CN213314212U - Chlorinated paraffin production tail gas treatment device - Google Patents
Chlorinated paraffin production tail gas treatment device Download PDFInfo
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- CN213314212U CN213314212U CN202021461567.6U CN202021461567U CN213314212U CN 213314212 U CN213314212 U CN 213314212U CN 202021461567 U CN202021461567 U CN 202021461567U CN 213314212 U CN213314212 U CN 213314212U
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- tail gas
- kettle
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- chlorinated paraffin
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Abstract
The utility model relates to a tail gas treatment device for chlorinated paraffin production, belonging to the technical field of chemical production; the problem of light components of residual paraffin and a small amount of mixed gas of chlorine and hydrogen chloride in tail gas generated in chlorinated paraffin production is solved; the device specifically comprises a first-stage prefabricating kettle and a second-stage prefabricating kettle, wherein a feed inlet of the first-stage prefabricating kettle is connected with a light liquid wax tank, a feed inlet of the second-stage prefabricating kettle is connected with a heavy liquid wax tank, a tail gas discharge pipe of a chlorination reaction kettle is connected with a gas inlet of the first-stage prefabricating kettle, and a tail gas discharge pipe of the first-stage prefabricating kettle is connected with a gas inlet of the second-stage prefabricating; the device greatly reduces the paraffin oil content in dilute hydrochloric acid and concentrated hydrochloric acid, reduces the loss of raw materials, and reduces the amplitude by more than 95%; the safety of the chlorinated paraffin production and operation is improved, and the risk of flash explosion of the hydrochloric acid storage tank of the chlorinated paraffin device is reduced.
Description
Technical Field
The utility model belongs to the technical field of chemical production, concretely relates to chlorinated paraffin production tail gas processing apparatus is applied to chlorinated paraffin production process.
Background
The prior chlorinated paraffin is generally produced by a photocatalysis continuous method.
Raw material paraffin passes through the flowmeter through the pump of beating and carries one-level chlorination cauldron, through governing valve control one-level chlorination cauldron liquid level, one-level to six grades of chlorination kettles are the ladder and subtract the formula and arrange, overflow to six grades of chlorination kettles through overflow line, chlorine is let in respectively to six grades of chlorination kettles, chlorine pipeline is equipped with chlorine flowmeter and takes into the governing valve, controls chlorine input volume in the chlorination kettles at all levels, and its chlorine gets into chlorination cauldron liquid paraffin bottom by chlorination cauldron top insert tube, mixes with cauldron interior paraffin. And carrying out six-stage chlorination reaction on the materials in the kettle under the condition of ultraviolet light catalysis. The heat generated in the chlorination reaction process is taken away by the jacket circulating water and the cooler circulating water, and the flow of the circulating water is adjusted to control the material temperature of the reaction kettle, so that the crude chlorinated paraffin is obtained. Conveying the chlorinated paraffin crude product to a finished product refining kettle through a material pumping pump, blowing the chlorinated paraffin crude product from the kettle bottom by using nitrogen, taking away hydrogen chloride and trace residual chlorine in the material, and finally obtaining the finished product chlorinated paraffin.
In the production process, the raw material paraffin is reacted with the chlorine to generate hydrogen chloride tail gas, and a small amount of unreacted chlorine is mixed with the hydrogen chloride tail gas to form mixed gas, namely, the mixed gas of the reaction chlorine and the hydrogen chloride. The tail gas will carry a small amount of the chlorinated paraffin and the light paraffin components.
And (3) absorbing the hydrogen chloride gas in the tail gas by a tail gas absorption system, absorbing by using water and dilute hydrochloric acid to generate qualified hydrochloric acid, and conveying to a hydrochloric acid finished product tank area through a pipeline. And residual hydrogen chloride gas and chlorine gas which are not absorbed are sprayed and circularly absorbed by the packed tower and the alkali liquor, so that hydrogen chloride and trace chlorine gas in the tail gas are completely absorbed, and finally the tail gas is discharged at high altitude.
Because the tail gas contains partial unreacted paraffin light components, partial paraffin enters a hydrochloric acid system along with the tail gas in the tail gas absorption process and is stored in a hydrochloric acid intermediate tank, certain potential safety hazards exist, and the quality of hydrochloric acid products is damaged.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art's is not enough, provides a chlorinated paraffin production tail gas processing apparatus. Solves the problems of light components of residual paraffin and a small amount of mixed gas of chlorine and hydrogen chloride in the tail gas.
In order to achieve the above purpose, the present invention is achieved by the following technical solutions.
The utility model provides a chlorinated paraffin production tail gas processing apparatus, includes the prefabricated cauldron of chlorination reation kettle, one-level and the prefabricated cauldron of second grade, the feed inlet of the prefabricated cauldron of one-level is connected with light liquid wax jar through the inlet pipe, the feed inlet of the prefabricated cauldron of second grade is connected with heavy matter liquid wax jar through the inlet pipe, chlorination reation kettle's tail gas delivery pipe is connected with the air inlet of the prefabricated cauldron of one-level, the tail gas delivery pipe of the prefabricated cauldron of one-level is connected with the air inlet of the prefabricated cauldron of second grade, the tail gas delivery pipe of the prefabricated cauldron of second grade is connected with hydrogen chloride.
Furthermore, the hydrogen chloride absorption device is connected with a cooling water unit.
Furthermore, a tail gas discharge pipe of the chlorination reaction kettle is connected with a first gas-liquid separator.
Furthermore, a second gas-liquid separator is connected to the tail gas discharge pipe of the second-stage prefabricating kettle.
Further, the discharge hole of the first-stage prefabricated kettle and the discharge hole of the second-stage prefabricated kettle are respectively connected with the feed inlet of the chlorination reaction kettle through a discharge pipe.
The utility model discloses produced beneficial effect does for prior art.
The utility model greatly reduces the paraffin oil content in dilute hydrochloric acid and concentrated hydrochloric acid, reduces the raw material loss, and reduces the amplitude by more than 95%; meanwhile, the safety of the production and operation of the chlorinated paraffin is improved, and the risk of flash explosion of a hydrochloric acid storage tank of a chlorinated paraffin device is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the tail gas treatment device of the present invention.
Wherein, 1 is chlorination reation kettle, 2 is the prefabricated cauldron of one-level, 3 is the prefabricated cauldron of second grade, 4 are the discharging pipe, 5 are the tail gas discharge pipe, 6 are first vapour and liquid separator, 7 are second vapour and liquid separator, 8 are light liquid wax feed pipe, 9 are heavy liquid wax feed pipe, 10 are chlorine gas pipeline.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in figure 1, the chlorinated paraffin production tail gas treatment device comprises seven chlorinated reaction kettles 1 connected in series, a first-stage prefabricated kettle 2 and a second-stage prefabricated kettle 3 which are arranged at the front part of the feeding part of the chlorinated reaction kettle 1 connected in series, wherein the first-stage prefabricated kettle 2 and the second-stage prefabricated kettle 3 are used as a chlorinated reaction kettle and a tail gas residual chlorine absorption kettle and a paraffin absorption kettle which are generated by chlorination reaction, a feeding port of the specific first-stage prefabricated kettle 2 is connected with a light liquid wax tank through a light liquid wax feeding pipe 8 and used for feeding liquid paraffin with slightly light components according to production requirements, and a feeding port of the second-stage prefabricated kettle 3 is connected with a heavy liquid wax tank through a heavy liquid wax feeding pipe 9 and is connected with heavy paraffin with the initial boiling point of more than 260 ℃. The discharge hole of the second-stage prefabricated kettle 3 is connected with the discharge hole of the first-stage prefabricated kettle 2 in series and then is connected with the feed inlet of the foremost chlorination reaction kettle 1 through a discharge pipe 4; the tail gas discharge pipe 5 of each chlorination reaction kettle 1 firstly enters a first gas-liquid separator 6 for gas-liquid separation, then the tail gas enters a first-stage prefabricated kettle 2 through a pipeline and is inserted into the bottom material, chlorine in the tail gas reacts with liquid paraffin with slightly light components in the first-stage prefabricated kettle 2 and is absorbed, the tail gas discharge pipe 5 of the first-stage prefabricated kettle 2 is connected with the gas inlet of a second-stage prefabricated kettle 3, the heavy liquid wax is arranged in the second-stage prefabricated kettle 3, light liquid wax components contained in the tail gas discharged by the first-stage prefabricated kettle 2 are dissolved in the heavy liquid wax and are separated and removed, the tail gas discharge pipe 5 of the second-stage prefabricated kettle 3 firstly enters a second gas-liquid separator 7 and then is connected with a hydrogen chloride absorption device (not shown in the figure), the hydrogen chloride absorption device is connected with a cooling water unit, hydrogen chloride gas is absorbed through water, and the connected cooling water unit reduces the tail gas, The temperature of the concentrated hydrochloric acid ensures that the temperature of the dilute hydrochloric acid and the temperature of the concentrated hydrochloric acid are always lower than the flash point of the chlorinated raw material liquid paraffin by less than 10 ℃, and the operation safety is ensured.
The device greatly reduces the paraffin oil content in dilute hydrochloric acid and concentrated hydrochloric acid, reduces the loss of raw materials, and reduces the amplitude by more than 95%; the safety of the chlorinated paraffin production and operation is improved, and the risk of flash explosion of the hydrochloric acid storage tank of the chlorinated paraffin device is reduced.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (5)
1. The utility model provides a chlorinated paraffin production tail gas processing apparatus, includes chlorination reation kettle (1), its characterized in that still includes prefabricated cauldron of one-level (2) and second grade (3), the feed inlet of the prefabricated cauldron of one-level (2) is connected with light liquid wax jar through the inlet pipe, the feed inlet of the prefabricated cauldron of second grade (3) is connected with heavy matter liquid wax jar through the inlet pipe, the tail gas delivery pipe (5) of chlorination reation kettle (1) are connected with the air inlet of the prefabricated cauldron of one-level (2), the tail gas delivery pipe (5) of the prefabricated cauldron of one-level (2) are connected with the air inlet of the prefabricated cauldron of second grade (3), the tail gas delivery pipe (5) of the prefabricated cauldron of second grade (3) are connected with hydrogen chloride absorbing device.
2. The chlorinated paraffin production tail gas treatment device according to claim 1, wherein the hydrogen chloride absorption device is connected with a cooling water unit.
3. The chlorinated paraffin production tail gas treatment device according to claim 1, wherein a first gas-liquid separator (6) is connected to the tail gas discharge pipe (5) of the chlorination reaction kettle (1).
4. The chlorinated paraffin production tail gas treatment device according to claim 3, wherein a second gas-liquid separator (7) is connected to the tail gas discharge pipe (5) of the second-stage prefabrication kettle (3).
5. The chlorinated paraffin production tail gas treatment device according to claim 1, wherein the discharge port of the first-stage prefabrication kettle (2) and the discharge port of the second-stage prefabrication kettle (3) are respectively connected with the feed port of the chlorination reaction kettle (1) through a discharge pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021461567.6U CN213314212U (en) | 2020-07-22 | 2020-07-22 | Chlorinated paraffin production tail gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021461567.6U CN213314212U (en) | 2020-07-22 | 2020-07-22 | Chlorinated paraffin production tail gas treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213314212U true CN213314212U (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021461567.6U Active CN213314212U (en) | 2020-07-22 | 2020-07-22 | Chlorinated paraffin production tail gas treatment device |
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| Country | Link |
|---|---|
| CN (1) | CN213314212U (en) |
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- 2020-07-22 CN CN202021461567.6U patent/CN213314212U/en active Active
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