CN210698925U - Degassing system with strong stability - Google Patents
Degassing system with strong stability Download PDFInfo
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- CN210698925U CN210698925U CN201920824546.7U CN201920824546U CN210698925U CN 210698925 U CN210698925 U CN 210698925U CN 201920824546 U CN201920824546 U CN 201920824546U CN 210698925 U CN210698925 U CN 210698925U
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Abstract
The utility model relates to a degassing system with strong stability, which comprises an air inlet, a degassing condenser, a degassing emptying condenser, an air outlet, a degassing circulation tank, a degassing cold liquid pump and a phosgene solution tank; the air inlet is sequentially communicated with the degassing condenser, the degassing emptying condenser and the air outlet in series; the condensate of the degassing condenser and the condensate of the degassing and emptying condenser are respectively communicated with a degassing circulation tank through pipelines; the liquid outlet of the degassing circulation tank is communicated with a degassing cold liquid pump and a phosgene solution tank in sequence; the exhaust port of the degassing circulation tank is communicated with the gas outlet through a pipeline; a spraying circulation pipeline is arranged between the outlet of the degassing cold liquid pump and the inlet of the degassing condenser; the spraying circulation pipeline is communicated with a spray head arranged in the degassing condenser, and condensed fluid sprayed and returned by the spray head cools and washes the tubes in the degassing condenser.
Description
Technical Field
The utility model belongs to the technical field of chemical production and specifically relates to a strong degasification system of stability.
Background
The production process of toluene diisocyanate (TDI for short) is complex in technology, the material from the phosgenation reaction separator still contains a considerable amount of phosgene and HCl, and the decomposition of amino hydrochloride also produces new HCl, and these gases need to be separated by a degassing system. Because the operation period of the degassing condenser is less than 2 months, when the condenser is not smooth, the degassing condenser must be cleaned by stopping and linkage inspection, and the time from stopping to successfully driving is generally 1-2 days. Therefore, the long-period stable operation of the whole system is influenced, and the energy consumption, the material consumption and the like are increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned problem that prior art exists, the utility model provides a degasification system that stability is strong sprays in sending back the degasification condenser through the partial condensate that sprays the circulation line and will degasification circulation tank outflow, not only can reduce the temperature that the gaseous phase got into the degasification condenser, can also wash the tubulation in the degasification condenser, can prolong the life cycle of tubulation, and then improve degasification system's stability.
The technical scheme of the utility model as follows:
a degassing system with strong stability comprises an air inlet, a degassing condenser, a degassing emptying condenser, an air outlet, a degassing circulation tank, a degassing cold liquid pump and a phosgene solution tank; the air inlet is sequentially communicated with the degassing condenser, the degassing emptying condenser and the air outlet in series; the condensate of the degassing condenser and the condensate of the degassing and emptying condenser are respectively communicated with a degassing circulation tank through pipelines; the liquid outlet of the degassing circulation tank is communicated with a degassing cold liquid pump and a phosgene solution tank in sequence; the exhaust port of the degassing circulation tank is communicated with the gas outlet through a pipeline; a spraying circulation pipeline is arranged between the outlet of the degassing cold liquid pump and the inlet of the degassing condenser; the spraying circulation pipeline is communicated with a spray head arranged in the degassing condenser, and condensed fluid sprayed and returned by the spray head cools and washes the tubes in the degassing condenser.
Furthermore, a circulating liquid pipeline is arranged between the outlet of the degassing cold liquid pump and the degassing circulating tank; and a first regulating valve is arranged on a pipeline between the circulating liquid pipeline and the gas outlet, and the liquid level of the degassing circulating tank is regulated by changing the opening degree of the first regulating valve.
Furthermore, a second regulating valve for regulating the returning flow of the condensate is arranged on the spraying circulation pipeline.
Furthermore, a flowmeter for monitoring the return flow of the condensate is arranged on the spraying circulation pipeline.
Furthermore, a first valve and a second valve are respectively arranged on the pipelines at the front end and the rear end of the flowmeter.
Furthermore, be provided with the first barometer that is used for monitoring front end gas phase pressure on the pipeline of degasification condenser inlet end, be provided with the second barometer that is used for monitoring rear end gas phase pressure on the pipeline of degasification condenser outlet end, judge the operating condition of degasification condenser through the pressure differential of observing first barometer and second barometer.
Furthermore, a third valve is arranged between the first air pressure gauge and a pipeline at the air inlet end of the degassing condenser; and a fourth valve is arranged between the second barometer and the pipeline at the air outlet end of the degassing condenser.
The utility model discloses following beneficial effect has:
1. the utility model relates to a degasification system that stability is strong sprays in sending back the degasification condenser through the partial condensate that the circulation pipeline will degasification circulation tank flow out, not only can reduce the temperature that the gaseous phase got into the degasification condenser, can also wash the tubulation in the degasification condenser, can prolong the life cycle of tubulation, and then improve degasification system's stability.
2. The utility model relates to a strong degasification system of stability, the liquid level of the adjustable degasification circulating slot of aperture through changing first governing valve can effectively make degasification circulating slot keep suitable liquid level, promotes the degasification system and stably goes on.
3. The utility model relates to a degasification system that stability is strong, accessible second regulating valve adjust the flow that sprays the interior condensate of circulating line and loopback to spray the flow of interior condensate of circulating line through flowmeter real-time supervision, can provide technical parameter for production practice.
4. The utility model relates to a strong degasification system of stability, the accessible is observed first barometer and is judged degasification condenser's operating condition with the pressure differential of second barometer, the operating personnel of being convenient for in time monitors degasification system's operational aspect.
5. The utility model relates to a strong degasification system of stability, the cold liquid pump that outgases can provide power for the degasification system, can effectively promote the material to carry out normal circulation on each pipeline, can effectively improve the stability of degasification system.
Drawings
FIG. 1 is a schematic structural view of a degassing system before being modified;
fig. 2 is a schematic structural diagram of the modified degassing system of the present invention.
The reference numbers in the figures denote:
1. an air inlet; 2. a degassing condenser; 20. a spray head; 21. a first barometer; 22. a second barometer; 23. a third valve; 24. a fourth valve; 3. a degassing and emptying condenser; 4. an air outlet; 5. a degassing circulation tank; 6. degassing and cooling a liquid pump; 7. a phosgene solution tank; 8. a spray circulation pipeline; 80. a second regulating valve; 81. a flow meter; 82. a first valve; 83. a second valve; 9. a circulating fluid line; 90. a first regulator valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 2, a degassing system with high stability comprises a gas inlet 1, a degassing condenser 2, a degassing and emptying condenser 3, a gas outlet 4, a degassing circulation tank 5, a degassing cold liquid pump 6 and a phosgene solution tank 7; the gas inlet 1 is sequentially communicated with the degassing condenser 2, the degassing and emptying condenser 3 and the gas outlet 4 in series; the condensate of the degassing condenser 2 and the degassing emptying condenser 3 is respectively communicated with a degassing circulation tank 5 through pipelines; a liquid outlet of the degassing circulation tank 5 is communicated with a degassing cold liquid pump 6 and a phosgene solution tank 7 in sequence; an exhaust port of the degassing circulation tank 5 is communicated with the gas outlet 4 through a pipeline; a spraying circulation pipeline 8 is arranged between the outlet of the degassing cold liquid pump 6 and the inlet of the degassing condenser 2; the spraying circulation pipeline 8 is communicated with a spray head 20 arranged in the degassing condenser 2, and condensed fluid sprayed and returned by the spray head 20 is used for cooling and washing the tubes in the degassing condenser 2.
As shown in fig. 1 and fig. 2, a circulation liquid pipeline 9 is arranged between the outlet of the degassing cold liquid pump 6 and the degassing circulation tank 5; a first adjusting valve 90 is arranged on a pipeline between the circulating liquid pipeline 9 and the air outlet 4, and the liquid level of the degassing circulating tank 5 is adjusted by changing the opening degree of the first adjusting valve 90.
As shown in fig. 1 and 2, the spray circulation line 8 is provided with a second regulating valve 80 for regulating the condensate return flow rate.
As shown in fig. 1 and 2, a flow meter 81 for monitoring the condensate return flow rate is provided in the spray circulation line 8.
As shown in fig. 1 and 2, the pipes at the front and rear ends of the flow meter 81 are provided with a first valve 82 and a second valve 83, respectively.
As shown in fig. 1 and fig. 2, a first barometer 21 for monitoring the front-end gas-phase pressure is arranged on the pipeline at the gas inlet end of the degassing condenser 2, a second barometer 22 for monitoring the rear-end gas-phase pressure is arranged on the pipeline at the gas outlet end of the degassing condenser 2, and the working state of the degassing condenser 2 is determined by observing the pressure difference between the first barometer 21 and the second barometer 22.
As shown in fig. 1 and fig. 2, a third valve 23 is arranged between the first air pressure gauge 21 and the pipeline at the air inlet end of the degassing condenser 2; a fourth valve 24 is arranged between the second barometer 22 and the pipeline at the air outlet end of the degassing condenser 2.
The utility model discloses a theory of operation:
according to the degassing system with strong stability, when the liquid level of the degassing circulation tank 5 reaches 40%, the degassing cold liquid pump 6 is started to perform self-circulation, and the liquid level of the degassing circulation tank 5 is controlled through the first regulating valve 90; the first valve 82 and the second valve 83 in front of and behind the flow meter 81 are opened, and the second regulating valve is slowly opened to have an opening degree of 80-50% to form a degassing spraying circulation, so that the temperature of a gas phase entering the degassing condenser 2 can be reduced, the tube array in the degassing condenser 2 can be cleaned, the service cycle of the tube array can be prolonged, and the stability of a degassing system can be further improved; by observing the first barometer 21 and the second barometer 22, the gas phase pressures of the inlet end pipeline and the outlet end pipeline of the degassing condenser 2 can be known in time, and the operation condition of the degassing condenser 2 can be judged by the pressure difference between the first barometer 21 and the second barometer 22.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (7)
1. A degassing system with strong stability, which is characterized in that: comprises an air inlet (1), a degassing condenser (2), a degassing emptying condenser (3), an air outlet (4), a degassing circulation tank (5), a degassing cold liquid pump (6) and a phosgene solution tank (7); the air inlet (1) is sequentially communicated with the degassing condenser (2), the degassing and emptying condenser (3) and the air outlet (4) in series; the condensate of the degassing condenser (2) and the condensate of the degassing and emptying condenser (3) are respectively communicated with a degassing circulation tank (5) through pipelines; the liquid outlet of the degassing circulation tank (5) is communicated with a degassing cold liquid pump (6) and a phosgene solution tank (7) in sequence; an exhaust port of the degassing circulation tank (5) is communicated with the gas outlet (4) through a pipeline; a spraying circulation pipeline (8) is arranged between the outlet of the degassing cold liquid pump (6) and the inlet of the degassing condenser (2); the spraying circulation pipeline (8) is communicated with a spray head (20) arranged in the degassing condenser (2), and condensate returning sprayed by the spray head (20) cools and washes the tubes in the degassing condenser (2).
2. A robust degassing system according to claim 1 further comprising: a circulating liquid pipeline (9) is arranged between the outlet of the degassing cold liquid pump (6) and the degassing circulating tank (5); a first regulating valve (90) is arranged on a pipeline between the circulating liquid pipeline (9) and the air outlet (4), and the liquid level of the degassing circulating tank (5) is regulated by changing the opening degree of the first regulating valve (90).
3. A robust degassing system according to claim 1 further comprising: and a second regulating valve (80) for regulating the return flow of the condensate is arranged on the spraying circulating pipeline (8).
4. A robust degassing system according to claim 1 further comprising: and a flow meter (81) for monitoring the return flow of the condensate is arranged on the spraying circulating pipeline (8).
5. A robust degassing system according to claim 4 wherein: and a first valve (82) and a second valve (83) are respectively arranged on the pipelines at the front end and the rear end of the flowmeter (81).
6. A robust degassing system according to claim 1 further comprising: be provided with first barometer (21) that is used for monitoring front end gas phase pressure on the pipeline of degasification condenser (2) inlet end, be provided with second barometer (22) that are used for monitoring rear end gas phase pressure on the pipeline of degasification condenser (2) the end of giving vent to anger, judge the operating condition of degasification condenser (2) through the pressure differential of observing first barometer (21) and second barometer (22).
7. A robust degassing system according to claim 6 further comprising: a third valve (23) is arranged between the first air pressure gauge (21) and a pipeline at the air inlet end of the degassing condenser (2); and a fourth valve (24) is arranged between the second barometer (22) and the pipeline at the air outlet end of the degassing condenser (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920824546.7U CN210698925U (en) | 2019-06-03 | 2019-06-03 | Degassing system with strong stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920824546.7U CN210698925U (en) | 2019-06-03 | 2019-06-03 | Degassing system with strong stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210698925U true CN210698925U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920824546.7U Active CN210698925U (en) | 2019-06-03 | 2019-06-03 | Degassing system with strong stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210698925U (en) |
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2019
- 2019-06-03 CN CN201920824546.7U patent/CN210698925U/en active Active
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