CN213314215U - Multistage recovery system of triethylene glycol waste liquid - Google Patents
Multistage recovery system of triethylene glycol waste liquid Download PDFInfo
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- CN213314215U CN213314215U CN202021762457.3U CN202021762457U CN213314215U CN 213314215 U CN213314215 U CN 213314215U CN 202021762457 U CN202021762457 U CN 202021762457U CN 213314215 U CN213314215 U CN 213314215U
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Abstract
The utility model relates to a triethylene glycol waste liquid multistage recovery system, which comprises a closed waste liquid recovery tank, a first tail gas absorption tank and a second tail gas absorption tank; water seals are arranged in the first tail gas absorption tank and the second tail gas absorption tank, the inlet ends of the first metal pipeline and the second metal pipeline are respectively positioned at the upper parts of the waste liquid recovery tank and the first tail gas absorption tank, and the outlet ends of the first metal pipeline and the second metal pipeline are respectively positioned below the water seal liquid levels of the first tail gas absorption tank and the second tail gas absorption tank so as to absorb the waste gas escaping from the waste liquid recovery tank; the inlet ends and the outlet ends of the first metal pipeline and the second metal pipeline are both in a bell mouth shape. The utility model discloses rational in infrastructure, design benefit effectively retrieves clean remaining triethylene glycol waste liquid waste gas of operation, and airtight recovery, the non-staining environment reduces personnel's on-the-spot operation safety risk, and it is good to retrieve the effect, to prior art, has fine market prospect and development space.
Description
Technical Field
The utility model relates to a nylon 66 continuous polymerization production technical field, concretely relates to multistage recovery system of triethylene glycol waste liquid.
Background
Nylon is commonly known as polyamide, and is a general name of thermoplastic resins containing a repeating amide group- [ NHCO ] -, which are a wide variety of nylon, including nylon 6, nylon 66, nylon ll, nylon 12, nylon 46, and the like. The polyamide is mainly used for synthetic fibers, and the products have wide application, replace good materials of steel, iron, copper and other metals with plastics and are important engineering plastics. At present, in the continuous polymerization production process of nylon 66, triethylene glycol is used for cleaning operation after equipment stops in a polymerization stage, and the main function is to dissolve residual polymer and facilitate maintenance. However, the triethylene glycol cleaning operation has the following technical problems: 1. after the cleaning operation of the triethylene glycol is finished, the triethylene glycol needs to be discharged to a special container at a high temperature, and because the triethylene glycol is seriously volatilized at the high temperature, the volatilized waste gas has great pollution to the environment when the triethylene glycol is collected in an open manner. 2. The discharge operation is carried out at high temperature, and the safety risk exists in the field operation of personnel.
How to design a rational in infrastructure, design benefit effectively retrieves clean operation remaining triethylene glycol waste liquid waste gas, and airtight recovery, the non-staining environment reduces personnel's on-the-spot operation safety risk, and the multistage recovery system of triethylene glycol waste liquid that recovery effect is good is the problem that needs to solve at present.
SUMMERY OF THE UTILITY MODEL
The problem that the triethylene glycol in the existing triethylene glycol cleaning operation needs to be discharged to a special container at high temperature after the cleaning operation is finished is solved, and the pollution of volatilized waste gas to the environment is large when the triethylene glycol is collected in an open manner due to serious volatilization of the triethylene glycol at high temperature; the operation of discharging is gone on under the high temperature, and personnel's field operation has technical problem such as safe risk, the utility model provides a multistage recovery system of triethylene glycol waste liquid realizes rational in infrastructure, and design benefit effectively retrieves and cleans remaining triethylene glycol waste liquid waste gas of operation, and airtight recovery, non-staining environment reduces personnel's field operation safety risk, retrieves the good purpose of effect.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a triethylene glycol waste liquid multistage recovery system comprises a closed waste liquid recovery tank, a first tail gas absorption tank and a second tail gas absorption tank, wherein the waste liquid recovery tank is communicated with the inlet end of the first tail gas absorption tank through a first metal pipeline; the first tail gas absorption tank and the second tail gas absorption tank are internally provided with water seals, the inlet ends of the first metal pipeline and the second metal pipeline are respectively positioned at the upper parts of the waste liquid recovery tank and the first tail gas absorption tank, and the outlet ends of the first metal pipeline and the second metal pipeline are respectively positioned below the water seal liquid levels of the first tail gas absorption tank and the second tail gas absorption tank so as to absorb the waste gas escaping from the waste liquid recovery tank; a waste liquid inlet for descending waste liquid is arranged above the waste liquid recovery tank; the inlet ends and the outlet ends of the first metal pipeline and the second metal pipeline are both in a horn mouth shape.
And flow control valves are arranged on the waste liquid inlet, the first metal pipeline and the second metal pipeline.
The second tail gas absorption groove is also provided with a negative pressure pump, and the lower end of the negative pressure pump is provided with an open water seal groove.
The waste liquid recovery tank is also provided with a pressure detection meter for detecting the pressure in the waste liquid recovery tank in real time.
The waste liquid recovery tank, the first tail gas absorption tank, the second tail gas absorption tank, the first metal pipeline and the second metal pipeline are all made of stainless steel.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model comprises a closed waste liquid recovery tank, a first tail gas absorption tank and a second tail gas absorption tank, wherein the waste liquid recovery tank is communicated with the inlet end of the first tail gas absorption tank through a first metal pipeline, the outlet end of the first tail gas absorption tank is communicated with the second tail gas absorption tank through a second metal pipeline, and the end parts of the first metal pipeline and the second metal pipeline are quickly connected through flanges; the utility model discloses increase waste liquid recovery groove, first tail gas absorption groove and second tail gas absorption groove innovatively, changed current extensive formula waste liquid recovery mode, will open-air open recovery become to seal the recovery, the effectual triethylene glycol waste liquid and the waste gas of discharging after the equipment of polymerization stage is washed are retrieved, realize the zero pollution discharge to the air, have effectively protected the environment, and the whole recovery process is gone on under a sealed state, has reduced personnel's operation risk;
2) the first tail gas absorption tank and the second tail gas absorption tank are internally provided with water seals, the inlet ends of the first metal pipeline and the second metal pipeline are respectively positioned at the upper parts of the waste liquid recovery tank and the first tail gas absorption tank, and the outlet ends of the first metal pipeline and the second metal pipeline are respectively positioned below the water seal liquid levels of the first tail gas absorption tank and the second tail gas absorption tank so as to absorb the waste gas escaping from the waste liquid recovery tank;
3) a waste liquid inlet for descending waste liquid is arranged above the waste liquid recovery tank; the inlet ends and the outlet ends of the first metal pipeline and the second metal pipeline are both in a bell mouth shape;
4) the waste liquid inlet, the first metal pipeline and the second metal pipeline are all provided with flow control valves;
5) the second tail gas absorption groove is also provided with a negative pressure pump which provides a negative pressure state so as to be beneficial to quickly absorbing residual waste gas in the first tail gas absorption groove and the second tail gas absorption groove by water seal, and the lower end of the negative pressure pump is provided with an open water seal groove so as to thoroughly treat the final waste gas;
6) waste liquid import, first metal pipeline, second metal pipeline on all be provided with flow control valve, the effluent collecting tank on still be provided with the pressure measurement table that is used for real-time detection effluent collecting tank inslot pressure, flow control valve and pressure measurement table combined action to monitor the waste liquid waste gas to in effluent collecting tank, first tail gas absorption groove and the second tail gas absorption groove and retrieve, the operation is safer.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
FIG. 2 is a schematic view of the structure of a first metal pipeline and a second metal pipeline;
the labels in the figure are: 1. waste liquid recovery groove, 2, first tail gas absorption tank, 3, second tail gas absorption tank, 4, first metal pipeline, 5, second metal pipeline, 6, waste liquid import, 7, flow control valve, 8, negative pressure pump, 9, uncovered water seal tank, 10, pressure measurement table, 11, material pipe, 12, aggregator.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in the figure, the triethylene glycol waste liquid multistage recovery system comprises a closed waste liquid recovery tank 1, a first tail gas absorption tank 2 and a second tail gas absorption tank 3, wherein the waste liquid recovery tank 1 is communicated with the inlet end of the first tail gas absorption tank 2 through a first metal pipeline 4, the outlet end of the first tail gas absorption tank 2 is communicated with the second tail gas absorption tank 3 through a second metal pipeline 5, and the end parts of the first metal pipeline 4 and the second metal pipeline 5 are quickly connected through flanges; water seals are arranged inside the first tail gas absorption tank 2 and the second tail gas absorption tank 3, inlet ends of a first metal pipeline 4 and a second metal pipeline 5 are respectively positioned at the upper parts of the waste liquid recovery tank 1 and the first tail gas absorption tank 2, and outlet ends of the first metal pipeline 4 and the second metal pipeline 5 are respectively positioned below the water seal liquid levels of the first tail gas absorption tank 2 and the second tail gas absorption tank 3, so that the waste gas escaping from the waste liquid recovery tank 1 can be absorbed; a waste liquid inlet 6 for descending waste liquid is arranged above the waste liquid recovery tank 1; the inlet ends and the outlet ends of the first metal pipeline 4 and the second metal pipeline 5 are in a bell mouth shape.
The basic implementation manner of the present invention can be further improved, perfected and limited on the basis: the waste liquid inlet 6, the first metal pipeline 4 and the second metal pipeline 5 are all provided with flow control valves 7.
The basic implementation manner of the present invention can be further improved, perfected and limited on the basis: the second tail gas absorption groove 3 is also provided with a negative pressure pump 8, and the lower end of the negative pressure pump 8 is provided with an open water seal groove 9.
The basic implementation manner of the present invention can be further improved, perfected and limited on the basis: the effluent collecting tank 1 is further provided with a pressure detecting meter 10 for detecting the pressure in the effluent collecting tank 1 in real time.
The basic implementation manner of the present invention can be further improved, perfected and limited on the basis: the waste liquid recovery tank 1, the first tail gas absorption tank 2, the second tail gas absorption tank 3, the first metal pipeline 4 and the second metal pipeline 5 are all made of stainless steel.
As shown in fig. 1 and fig. 2, the working process of the present invention is as follows: after the polymerization reaction stage is finished, the interior of a polymerizer 12 is cleaned by using triethylene glycol, after the cleaning operation is finished, the pipe orifice of a material pipe 11 of the polymerizer 12 is connected with a pipeline of a waste liquid inlet 6 of a recovery system, a flow control valve 7 is opened, triethylene glycol waste liquid in a high-temperature state enters a waste liquid recovery tank 1 from the polymerizer 12 and stays at the bottom of the tank, the pressure of the waste liquid recovery tank 1 is increased, a small part of waste liquid steam can be extruded to the upper part of the waste liquid recovery tank 1, enters a first tail gas absorption tank 2 through a bell-mouthed inlet end of a first metal pipeline 4, enters a water seal of the first tail gas absorption tank 2 through a bell-mouthed outlet end of the first metal pipeline 4, and is condensed and absorbed by the; a small amount of waste liquid steam can be continuously extruded to the upper part of the first tail gas absorption tank 2, enters the second tail gas absorption tank 3 through the bell-mouth-shaped inlet end of the second metal pipeline 5, enters the water seal of the second tail gas absorption tank 3 through the bell-mouth-shaped outlet end of the second metal pipeline 5, and is condensed and absorbed by the water seal; still be provided with negative pressure pump 8 on the second tail gas absorption groove 3, negative pressure pump 8 provides negative pressure state, make first tail gas absorption groove 2 and the interior gas pressure of second tail gas absorption groove 3 reduce, form one and be favorable to remaining waste gas rapid outside exhaust negative pressure chamber, so that make remaining waste gas get into in first tail gas absorption groove 2 and the second tail gas absorption groove 3 rapidly and absorbed by the water seal, negative pressure pump 8's lower extreme is provided with uncovered water seal groove 9, in order thoroughly with final exhaust-gas treatment.
In practical application, waste liquid recovery groove 1, first tail gas absorption groove 2, second tail gas absorption groove 3, first metal pipeline 4 and second metal pipeline 5 all adopt stainless steel, and the material texture is inseparable, does not take place the reaction with waste liquid and water, and long service life, through actual test, recovery effect is good.
The utility model has reasonable structure and ingenious design, effectively recovers the residual triethylene glycol waste liquid and waste gas in the cleaning operation, is airtight for recovery, does not pollute the environment, reduces the safety risk of personnel on-site operation, has good recovery effect, solves the problem that the triethylene glycol in the existing triethylene glycol cleaning operation needs to be discharged to a special container at high temperature after the cleaning operation is finished, and has serious volatilization of the triethylene glycol at high temperature, and the volatile waste gas has great pollution to the environment when being collected in an open way; the discharge operation is carried out at high temperature, the technical problems of safety risk and the like exist in the field operation of personnel, and the method has good market prospect and development space for the prior art.
The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples, and various changes can be made without departing from the concept of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. The utility model provides a multistage recovery system of triethylene glycol waste liquid which characterized in that: the device comprises a closed waste liquid recovery tank (1), a first tail gas absorption tank (2) and a second tail gas absorption tank (3), wherein the waste liquid recovery tank (1) is communicated with the inlet end of the first tail gas absorption tank (2) through a first metal pipeline (4), the outlet end of the first tail gas absorption tank (2) is communicated with the second tail gas absorption tank (3) through a second metal pipeline (5), and the end parts of the first metal pipeline (4) and the second metal pipeline (5) are quickly connected through flanges; water seals are arranged in the first tail gas absorption tank (2) and the second tail gas absorption tank (3), the inlet ends of the first metal pipeline (4) and the second metal pipeline (5) are respectively positioned at the upper parts of the waste liquid recovery tank (1) and the first tail gas absorption tank (2), and the outlet ends of the first metal pipeline (4) and the second metal pipeline (5) are respectively positioned below the water seal liquid level of the first tail gas absorption tank (2) and the second tail gas absorption tank (3) so as to absorb the waste gas escaping from the waste liquid recovery tank (1); a waste liquid inlet (6) for descending waste liquid is arranged above the waste liquid recovery tank (1); the inlet ends and the outlet ends of the first metal pipeline (4) and the second metal pipeline (5) are in a horn mouth shape.
2. The multistage triethylene glycol waste liquid recovery system of claim 1, wherein: and the waste liquid inlet (6), the first metal pipeline (4) and the second metal pipeline (5) are all provided with flow control valves (7).
3. The multistage triethylene glycol waste liquid recovery system of claim 1, wherein: the second tail gas absorption tank (3) is also provided with a negative pressure pump (8), and the lower end of the negative pressure pump (8) is provided with an open water seal tank (9).
4. The multistage triethylene glycol waste liquid recovery system of claim 1, wherein: the waste liquid recovery tank (1) is also provided with a pressure detection meter (10) for detecting the pressure in the waste liquid recovery tank (1) in real time.
5. The multistage triethylene glycol waste liquid recovery system of claim 1, wherein: the waste liquid recovery tank (1), the first tail gas absorption tank (2), the second tail gas absorption tank (3), the first metal pipeline (4) and the second metal pipeline (5) are all made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021762457.3U CN213314215U (en) | 2020-08-21 | 2020-08-21 | Multistage recovery system of triethylene glycol waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021762457.3U CN213314215U (en) | 2020-08-21 | 2020-08-21 | Multistage recovery system of triethylene glycol waste liquid |
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| CN213314215U true CN213314215U (en) | 2021-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115854082A (en) * | 2023-02-24 | 2023-03-28 | 东营联合石化有限责任公司 | Gas holder water seal device for removing ammonia gas from low-pressure gas and using method thereof |
-
2020
- 2020-08-21 CN CN202021762457.3U patent/CN213314215U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115854082A (en) * | 2023-02-24 | 2023-03-28 | 东营联合石化有限责任公司 | Gas holder water seal device for removing ammonia gas from low-pressure gas and using method thereof |
| CN115854082B (en) * | 2023-02-24 | 2023-05-16 | 东营联合石化有限责任公司 | Gas holder water seal device for removing ammonia gas from low-pressure gas and use method thereof |
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