CN214486322U - Chlorinated paraffin tail gas treatment device - Google Patents
Chlorinated paraffin tail gas treatment device Download PDFInfo
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- CN214486322U CN214486322U CN202120784358.3U CN202120784358U CN214486322U CN 214486322 U CN214486322 U CN 214486322U CN 202120784358 U CN202120784358 U CN 202120784358U CN 214486322 U CN214486322 U CN 214486322U
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Abstract
The utility model discloses a chlorinated paraffin tail gas treatment device, which comprises a conveying station, an oil-gas separator, a pretreatment tank, a main absorption tower, an auxiliary absorption tank and a recovery pump; the conveying station is communicated with a tail gas exhaust port of the reaction kettle in a one-way mode, the conveying station takes inert gas as a conveying medium to convey tail gas to the oil-gas separator, a gas outlet in the upper portion of the oil-gas separator is communicated with the pretreatment tank, a discharge port in the bottom of the pretreatment tank and a discharge port in the lower portion of the oil-gas separator are both communicated with a paraffin recovery pipe, and the paraffin recovery pipe is connected to the reaction kettle or the paraffin recovery tank; the upper exhaust port of the pretreatment tank is connected to a nitrogen recovery tank after sequentially passing through the main absorption tower and the auxiliary absorption tower, the nitrogen recovery tank is connected to a conveying station through a pipeline, nitrogen is used as a power source to convey tail gas, paraffin is separated through twice treatment, chlorine and hydrogen chloride are absorbed through three times of treatment, and the nitrogen is recycled.
Description
Technical Field
The utility model belongs to the technical field of the chlorinated paraffin processing, concretely relates to chlorinated paraffin tail gas processing apparatus.
Background
Chlorinated paraffins are products obtained by chlorination of paraffins and are chlorinated derivatives of paraffins. Has good electrical insulation, fire resistance, flame retardance and other characteristics and is cheap, so the composite material is widely applied to producing products such as cable materials, floor plates, hoses, artificial leather, rubber and the like and applied to additives such as coating, lubricating oil and the like.
In the production process of chlorinated paraffin, tail gas containing chlorine and wax oil raw materials is generated due to reasons of inaccurate raw material feeding, insufficient reaction and the like, the tail gas containing the chlorine is directly discharged to cause raw material waste, the production cost consumption is increased, meanwhile, the chlorine is easy to be mixed with water vapor in the air to generate hydrogen chloride gas, the environment is polluted, the chlorine raw material is wasted after the chlorine is discharged by adopting independent tail gas treatment equipment, the raw material utilization rate is reduced, the cost input consumption is increased, and the production efficiency is influenced; consequently, need handle the tail gas that continuously produces in the chlorinated paraffin preparation process, among the current tail gas treatment process, generally rely on reation kettle self pressure to export tail gas, also adopt the air to carry tail gas as the medium, but in this kind of structure, cause other impurity in impurity and the tail gas to take place to react easily, influence recovery effect, and the tail gas after the processing is direct atmospheric emission at last, cause the pollution to the environment easily, only adopt an absorption liquid in the current recovery structure simultaneously, absorptive effect is poor.
Disclosure of Invention
Defect and problem to existing equipment existence, the utility model provides a chlorinated paraffin tail gas processing apparatus, the effectual tail gas absorption effect who exists of having solved among the existing equipment is poor, and the atmosphere is directly discharged into after the tail gas treatment, causes environmental pollution's problem easily.
The utility model provides a scheme that its technical problem adopted is: a chlorinated paraffin tail gas treatment device comprises a conveying station, an oil-gas separator, a pretreatment tank, a main absorption tower, an auxiliary absorption tank and a recovery pump; the conveying station is communicated with a tail gas exhaust port of the reaction kettle in a one-way mode, the conveying station takes inert gas as a conveying medium to convey tail gas to the oil-gas separator, a gas outlet in the upper portion of the oil-gas separator is communicated with the pretreatment tank, a discharge port in the bottom of the pretreatment tank and a discharge port in the lower portion of the oil-gas separator are both communicated with a paraffin recovery pipe, and the paraffin recovery pipe is connected to the reaction kettle or the paraffin recovery tank; an upper exhaust port of the pretreatment tank is sequentially connected to a nitrogen recovery tank after passing through a main absorption tower and an auxiliary absorption tower, the nitrogen recovery tank is connected to a conveying station through a pipeline, and a gas supplementing tank is connected to the nitrogen recovery tank; the upper part in the main absorption tower is provided with a spray pipe, the lower part is provided with absorption liquid, and tail gas enters the liquid level of the absorption liquid through an air inlet pipe.
Furthermore, the reaction kettle is connected with a buffer tank through a one-way valve, and the buffer tank is communicated with the conveying station.
Further, the inert gas is nitrogen.
Furthermore, a pressure gauge and a chlorine content detector are arranged on the nitrogen recovery tank.
Further, the absorption liquid of the main absorption tower and the absorption liquid of the auxiliary absorption tank are respectively NaOH and Ca (OH)2。
The utility model has the advantages that: the utility model takes nitrogen as conveying gas, the compressor provides the conveying gas with certain power, the conveying gas and tail gas are mixed and then generate power, and the conveying gas and tail gas enter an oil-gas separator to be separated for the first time, paraffin is separated out, gas phase enters a pretreatment tank to be separated for the second time, paraffin and gaseous tail gas are basically and completely separated after twice treatment, residual chlorine and hydrogen chloride gas enter a main absorption tower, firstly, the chlorine and hydrogen chloride gas enter the bottom of the main absorption tower to be absorbed below the liquid level of absorption liquid for the first-stage absorption, then, the liquid level upwards passes through spray liquid to be absorbed for the second-stage absorption, then, the chlorine and hydrogen chloride gas enter an auxiliary absorption tank from the main absorption tower, the liquid seal mode is also adopted to carry out the third-stage treatment, the chlorine and hydrogen chloride are basically absorbed through the third-stage treatment, nitrogen can not react with the absorption liquid due to stable molecular structure, and only serves as a transportation carrier, in order to avoid its direct atmosphere that gets into, improve its utilization ratio, the utility model discloses in directly discharging tail gas and retrieving the jar, then will retrieve the jar and be connected with the compressor to form the circulation, little to environmental pollution, novel structure.
Meanwhile, in the utility model, the absorption liquid in the main absorption tower and the auxiliary absorption tank are respectively two different alkaline absorption liquids, so that the acid gas in the tail gas can be fully absorbed; and a water washing tank can be arranged in the next flow of the auxiliary absorption tank as required, the tail gas is input into the water washing tank, and the tail gas treatment condition is judged according to the PH value of the water washing tank.
Therefore, the utility model discloses novel structure adopts nitrogen gas to carry tail gas as the power supply to through twice processing separation paraffin, absorb chlorine and hydrogen chloride through the cubic processing and handle, and with nitrogen gas reuse after the circulation, whole process is abundant to each principal components processing in the tail gas, and it does not finally discharge tail gas into the atmosphere, and whole process circulates in inside, provides a neotype chlorinated paraffin tail gas processing apparatus for people.
Drawings
Fig. 1 is a flow chart of the tail gas treatment of the present invention.
FIG. 2 is a schematic view of the structure of the main absorption column.
The reference numbers in the figures are: the method comprises the following steps of 1, a conveying station, 2, an oil-gas separator, 3, a pretreatment tank, 4, a main absorption tower, 5, an auxiliary absorption tank, 6, a compressor, 7, a buffer tank, 8, a water washing tank and 9, wherein the auxiliary absorption tank is arranged in the conveying station; 10 is a pressure gauge, and 11 is a chlorine content detector; 12 is a gas supplementing tank; 41 is absorption liquid, and 42 is a shower pipe.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example 1: this embodiment aims at providing a chlorinated paraffin tail gas processing apparatus, mainly handle the tail gas that produces in the chlorinated paraffin production process, because of the raw materials puts in the tail gas that contains chlorine, wax oil raw materials because of reasons such as inaccurate, the reaction is insufficient in the current technology, the treatment is single in the present processing mode, it is poor with the recovery effect, can not satisfy people's demand, based on this, this embodiment provides one kind and uses nitrogen gas as conveying gas, carry out the tail gas processing apparatus that pertinence was handled through each principal components in to the tail gas many times.
As shown in fig. 1, the chlorinated paraffin tail gas treatment device in the embodiment includes a delivery station 1, an oil-gas separator 2, a pretreatment tank 3, a main absorption tower 4, an auxiliary absorption tank 5 and a recovery tank 9; wherein the one-way intercommunication of the tail gas vent of delivery site 1 and reation kettle, delivery site 1 uses inert gas to carry tail gas to oil and gas separator 2 as transport medium, in the specific embodiment, inert gas is nitrogen gas, use nitrogen gas to carry tail gas as the power supply, when concrete implementation, reation kettle is connected with buffer tank 7 through the check valve, buffer tank 7 and delivery site 1 intercommunication, utilize this structure can avoid the tail gas backward flow to cause the interference to the reaction in the reation kettle, tail gas gets into treatment facility after the delivery site applys power.
When the tail gas is treated, the tail gas is firstly injected into the oil-gas separator 2 in the embodiment, an upper gas outlet of the oil-gas separator 2 is communicated with the pretreatment tank 3, a discharge port at the bottom of the pretreatment tank 3 and a discharge port at the lower part of the oil-gas separator 2 are communicated with the paraffin recovery pipe, and the paraffin recovery pipe is connected to the reaction kettle or the paraffin recovery tank, so that the paraffin components in the tail gas are separated in the oil-gas separator 2 for the first time in the embodiment, and then separated in the pretreatment tank 3 for the second time, and after the separation for the second time, the tail gas is basically separated from all the tail gas, and the tail gas is conveyed into the paraffin recovery tank correspondingly or directly enters the production line for reutilization.
In the embodiment, an upper exhaust port of the pretreatment tank 3 sequentially passes through the main absorption tower 4 and the auxiliary absorption tower 5 and then is connected to the nitrogen recovery tank 9, the nitrogen recovery tank 9 is connected to the conveying station 1 through a pipeline, and the nitrogen recovery tank 9 is connected with a gas supplementing tank 12; the upper part in the main absorption tower 4 is provided with a spray pipe 42, the lower part is provided with absorption liquid 41, and tail gas enters the liquid level of the absorption liquid through an air inlet pipe.
In the embodiment, the residual chlorine gas and hydrogen chloride gas enter the main absorption tower 4, firstly enter the lower part of the liquid level of the absorption liquid 41 at the bottom of the main absorption tower 4 for primary absorption, then pass through the spraying liquid from the liquid level upwards for secondary absorption, then enter the auxiliary absorption tank 5 from the main absorption tower 4, and finally undergo tertiary treatment in a liquid seal manner, so that the chlorine gas and hydrogen chloride are basically absorbed through the tertiary treatment.
From this embodiment adopts nitrogen gas as the power supply to carry tail gas to through twice processing separation paraffin impurity, again through the cubic processing to chlorine and hydrogen chloride absorption processing, at last with nitrogen gas reuse after the circulation, whole process is abundant to each principal ingredients processing in the tail gas, and does not finally discharge tail gas into the atmosphere, whole process circulates in inside, provides a neotype chlorinated paraffin tail gas processing apparatus for people, has huge economy and environmental benefit.
Example 2: this example is substantially the same as example 1, except that: the embodiment is further supplemented to the tail gas treatment device.
In this embodiment, be provided with manometer and chlorine content detector on nitrogen recovery jar, dual-purpose manometer can detect the pressure in the nitrogen recovery jar 9 to carry out the tonifying qi according to pressure, utilize chlorine content detector to detect its inside chlorine content, show the treatment effect from data.
In this example, in order to further improve the absorption effect, the absorption liquids in the main absorption tower and the auxiliary absorption tank were NaOH and Ca (OH), respectively2(ii) a Therefore, the absorption liquid in the main absorption tower and the absorption liquid in the auxiliary absorption tank are respectively two different alkaline absorption liquids, so that the acid gas in the tail gas can be fully absorbed; and a water washing tank 8 can be arranged in the next flow of the auxiliary absorption tank as required, the tail gas is input into the water washing tank 8, the tail gas treatment condition is judged according to the PH value of the water washing tank, and impurities which are dissolved in water and have small content can be treated by the water washing tank.
Claims (5)
1. The utility model provides a chlorinated paraffin tail gas processing apparatus which characterized in that: the system comprises a conveying station, an oil-gas separator, a pretreatment tank, a main absorption tower, an auxiliary absorption tank and a recovery pump; the conveying station is communicated with a tail gas exhaust port of the reaction kettle in a one-way mode, the conveying station takes inert gas as a conveying medium to convey tail gas to the oil-gas separator, a gas outlet in the upper portion of the oil-gas separator is communicated with the pretreatment tank, a discharge port in the bottom of the pretreatment tank and a discharge port in the lower portion of the oil-gas separator are both communicated with a paraffin recovery pipe, and the paraffin recovery pipe is connected to the reaction kettle or the paraffin recovery tank; an upper exhaust port of the pretreatment tank is sequentially connected to a nitrogen recovery tank after passing through a main absorption tower and an auxiliary absorption tower, the nitrogen recovery tank is connected to a conveying station through a pipeline, and a gas supplementing tank is connected to the nitrogen recovery tank; the upper part in the main absorption tower is provided with a spray pipe, the lower part is provided with absorption liquid, and tail gas enters the liquid level of the absorption liquid through an air inlet pipe.
2. The chlorinated paraffin tail gas treatment device according to claim 1, characterized in that: the reaction kettle is connected with a buffer tank through a one-way valve, and the buffer tank is communicated with the conveying station.
3. The chlorinated paraffin tail gas treatment device according to claim 1, characterized in that: the inert gas is nitrogen.
4. The chlorinated paraffin tail gas treatment device according to claim 1, characterized in that: and a pressure gauge and a chlorine content detector are arranged on the nitrogen recovery tank.
5. The chlorinated paraffin tail gas treatment device according to claim 1, characterized in that: the absorption liquid of the main absorption tower and the absorption liquid of the auxiliary absorption tank are respectively NaOH and Ca (OH)2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120784358.3U CN214486322U (en) | 2021-04-16 | 2021-04-16 | Chlorinated paraffin tail gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120784358.3U CN214486322U (en) | 2021-04-16 | 2021-04-16 | Chlorinated paraffin tail gas treatment device |
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| CN214486322U true CN214486322U (en) | 2021-10-26 |
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| CN202120784358.3U Active CN214486322U (en) | 2021-04-16 | 2021-04-16 | Chlorinated paraffin tail gas treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116622410A (en) * | 2023-05-09 | 2023-08-22 | 优利德(江苏)化工有限公司 | Chlorinated paraffin preparation system with chlorine recycling function |
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2021
- 2021-04-16 CN CN202120784358.3U patent/CN214486322U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116622410A (en) * | 2023-05-09 | 2023-08-22 | 优利德(江苏)化工有限公司 | Chlorinated paraffin preparation system with chlorine recycling function |
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