Polymer polyol waste gas recovery system

Abstract

The utility model relates to the technical field of waste gas recovery, and particularly discloses a polymer polyol waste gas recovery system which comprises a configuration tank, the configuration tank is connected with an intermediate tank through a raw material feeding line, and the intermediate tank is connected with a reaction system through a raw material feeding line B; the reaction system is connected with the unreacted monomer removal system through a POP feeding downstream unreacted monomer removal pipeline, the unreacted monomer removal system is connected with the quality control tank through a POP feeding pipeline, and the unreacted monomer removal system is connected with the vacuum system through an unreacted monomer collection pipeline; according to the system, unreacted monomers removed by the vacuum system are condensed and collected and then are recycled and reacted again, so that the utilization rate of the monomers is increased and the environmental pollution is reduced. According to the system, the waste gas collecting tank, the air blower, the condensate recycling system, the condensate collecting tank and corresponding pipelines are additionally arranged, so that waste gas generated by polymer polyol is recycled, and the conversion rate of monomers is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas recovery technical field, concretely is a kind of polymer polyol waste gas recovery system. BACKGROUND

[0002] Polymer polyol is a new type of modified polyether polyol emerging with the development of the application field of polyurethane foam plastic.Currently, the main polyether polyol based on flexible foam is polyether, in the presence of stabilizer, polymerization monomer styrene and acrylonitrile in polyether medium, using intermittent method or continuous method to manufacture polymer polyol containing polyacrylonitrile (or styrene and acrylonitrile copolymer) particles. Because polymer polyol not only maintains the original flexibility of polyether chain, but also increases the good mechanical properties (such as rigidity, flame retardancy) of branched vinyl polymer, in recent ten years, the application field of high solid content polymer polyol product is continuously expanding. Because the conversion rate of polymerization monomer styrene and acrylonitrile in the reaction process does not reach 100%, usually, vacuum pump is used to remove unreacted monomer, and the unreacted monomer after removal is incinerated; not only the utilization rate of recovered monomer is low, but also serious pollution and waste are caused, and therefore a polymer polyol waste gas recovery system is provided. SUMMARY

[0003] The utility model aims at the defects of prior art, provides a kind of polymer polyol waste gas recovery system to solve the problems raised in the above background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of polymer polyol waste gas recovery system, including configuration tank, the configuration tank is connected with intermediate tank by raw material feeding line, the intermediate tank is connected with reaction system by raw material feeding line B, the reaction system is connected with unreacted monomer removal system by POP feeding to downstream unreacted monomer removal pipeline and unreacted monomer removal system, the unreacted monomer removal system is connected with quality control tank by POP feeding pipeline, the unreacted monomer removal system is connected with vacuum system by unreacted monomer collection pipeline, the vacuum system is connected with condensate recovery system by vacuum system condensate collection pipeline, the vacuum system is also connected with waste gas collection tank by vacuum system gas phase pipeline;

[0005] The condensate recovery system is connected with configuration tank by condensate recycling pipeline, the condensate recovery system is connected with waste gas collection tank by waste gas recycling system condensate collection pipeline A,

[0006] The waste gas collection tank is connected with air blower by gas phase air blower pipeline, the air blower is connected with waste gas reprocessing system by air blower feeding pipeline, the waste gas reprocessing system is connected with condensate recovery system by waste gas recycling system condensate collection pipeline B.

[0007] As a preferred technical scheme of the utility model, the waste gas collecting tank is connected with the vacuum system condensate collecting pipeline through a waste gas collecting tank condensate feeding pipeline.

[0008] As a preferred technical scheme of the utility model, the configuration tank and the intermediate tank are connected with the configuration tank and the intermediate tank gas phase line B through the configuration tank and the intermediate tank gas phase line A, and the configuration tank and the intermediate tank gas phase line B are connected with the waste gas collecting tank.

[0009] As a preferred technical scheme of the utility model, the vacuum system, the waste gas reprocessing system and the condensate recovery system are connected with the gas phase condensing system.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The system reuses the unreacted monomer removed by the vacuum system after condensing and collecting, improves the monomer utilization rate and reduces environmental pollution.

[0012] The system adds a waste gas collecting tank, a blower, a condensate recovery system, a condensate collecting tank and corresponding pipelines, recycles the waste gas generated by the polymer polyol, and improves the monomer conversion rate.

[0013] The waste gas treated by condensation is sent to the waste gas treatment system, avoiding the risk of gas phase liquid combustion of the waste gas directly sent to the waste gas treatment system without being treated. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model.

[0015] In the drawing: 1-configuration tank;2-configuration tank and intermediate tank gas phase line A;3-configuration tank and intermediate tank gas phase line B;4-raw material feeding line A;5-intermediate tank;6-raw material feeding line B;7-reaction system;8-POP feeding to downstream unreacted monomer removal pipeline;9-unreacted monomer removal system;10-POP feeding pipeline;11-quality control tank;12-unreacted monomer collecting pipeline;13-vacuum system;14-vacuum system gas phase pipeline;15-waste gas collecting tank;16-gas phase to blower pipeline;17-blower;18-blower feeding pipeline;19-waste gas reprocessing system;20-gas phase condensing system;21-waste gas recycling system condensate collecting pipeline A;22-condensate recovery system;23-waste gas collecting tank condensate feeding line;24-vacuum system condensate collecting pipeline;25-condensate recycling pipeline;26, waste gas recycling system condensate collecting pipeline B. DETAILED DESCRIPTION

[0016] The advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application can be more clearly defined, by the preferred embodiments of the present application in combination with the accompanying drawings.

[0017] Embodiment: please refer to Figure 1 The utility model provides a technical scheme: a kind of polymer polyol waste gas recovery system, including configuration tank 1, configuration tank 1 is connected with intermediate tank 5 by raw material feeding line A4, intermediate tank 5 is connected with reaction system 7 by raw material feeding line B6, reaction system 7 is connected with unreacted monomer removal system 9 by POP feeding to downstream unreacted monomer removal pipeline 8, unreacted monomer removal system 9 is connected with quality control tank 11 by POP feeding pipeline 10, unreacted monomer removal system 9 is connected with vacuum system 13 by unreacted monomer collection pipeline 12, vacuum system 13 is connected with condensate recovery system 22 by vacuum system condensate collection pipeline 24, vacuum system 13 is also connected with waste gas collection tank 15 by vacuum system gas phase pipeline 14.

[0018] Condensate recovery system 22 is connected with configuration tank 1 by condensate recycling pipeline 25, and condensate recovery system 22 is connected with waste gas collection tank 15 by waste gas recycling system condensate collection pipeline A21.

[0019] Waste gas collection tank 15 is connected with blower 17 by gas phase deaerator pipeline 16, and blower 17 is connected with waste gas reprocessing system 19 by blower feeding pipeline 18, and waste gas reprocessing system 19 is connected with condensate recovery system 22 by waste gas recycling system condensate collection pipeline B26.

[0020] Waste gas collection tank 15 is connected with vacuum system condensate collection pipeline 24 by waste gas collection tank condensate feeding pipeline 23.

[0021] Configuration tank 1 and intermediate tank 5 are connected with configuration tank and intermediate tank gas phase line A2 and configuration tank and intermediate tank gas phase line B3 by configuration tank and intermediate tank gas phase line A2, and configuration tank and intermediate tank gas phase line B3 are connected with waste gas collection tank 15.

[0022] Vacuum system 13, waste gas reprocessing system 19 and condensate recovery system 22 are connected with gas phase condensation system 20.

[0023] Working principle: a polymer polyol waste gas recovery system, base polyether, styrene, acrylonitrile, chain extender, dispersant and catalyst are configured in the configuration tank 1 according to the formula proportion, and the temperature is kept constant during the configuration process; if necessary, nitrogen blowing replacement is needed, the tail gas after replacement is collected to the waste gas collection tank 15 through the gas phase line A2 of the configuration tank 1 and the intermediate tank and the gas phase line B3 of the configuration tank and the intermediate tank; the prepared raw materials and catalyst are sent to the intermediate tank 5 through the raw material feeding line A4. The gas phase pipeline of the intermediate tank 5 is also collected to the waste gas collection tank 15. The material in the intermediate tank 5 is periodically or continuously fed to the reaction system 7. The material is reacted in the reaction system to obtain a mixture of polymer polyol and unreacted monomer. The mixture is sent to the downstream unreacted monomer removal system 9 for unreacted monomer removal. The unreacted monomer is removed by the vacuum system 13. The vacuum system is provided with a gas phase condensation system 20 to condense and recover the residual styrene and acrylonitrile monomers in the gas phase pipeline. The unreacted monomers condensed and recovered in the vacuum system 13 are sent to the condensate recovery system 22 through the vacuum system condensate collection pipeline 24. After the unreacted monomers are removed, the polymer polyol is sent to the quality control tank 11 through the POP feeding pipeline 10.

[0024] The styrene, acrylonitrile and other materials that may be condensed in the waste gas collection tank 15 are sent to the condensate recovery system 22 through the waste gas collection tank condensate feeding line 23. The gas in the waste gas collection tank 15 is sent to the gas phase condensation system 20 through the air blower 17. The gas in the gas phase condensation system 20 is cooled by the refrigerated water system 20 or other refrigerated medium, and the condensed liquid waste gas is sent to the condensate recovery system 22 through the recovery system condensate collection pipeline A21. The condensate in the condensate recovery system 22 is uniformly collected and then sent to the preparation tank 1 for recycling. The gas in the gas phase pipeline in the whole system is collected, and then further condensed. The condensed material is also collected. The tail gas treated in this way is sent to the waste gas treatment system for treatment.

[0025] The above embodiment only expresses the embodiment of the utility model, which is described in detail, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model.

Claims

1. A polymer polyol off-gas recovery system comprising a configuration tank (1), characterized in that: The configuration tank (1) is connected with the intermediate tank (5) through the raw material feeding line A (4), the intermediate tank (5) is connected with the reaction system (7) through the raw material feeding line B (6), the reaction system (7) is connected with the unreacted monomer removal system (9) through the POP feeding to the downstream unreacted monomer removal pipeline (8), the unreacted monomer removal system (9) is connected with the quality control tank (11) through the POP feeding pipeline (10), the unreacted monomer removal system (9) is connected with the vacuum system (13) through the unreacted monomer collection pipeline (12), the vacuum system (13) is connected with the condensate recovery system (22) through the vacuum system condensate collection pipeline (24), and the vacuum system (13) is also connected with the waste gas collection tank (15) through the vacuum system gas phase pipeline (14); The condensate recovery system (22) is connected with the configuration tank (1) through the condensate recycling pipeline (25), and the condensate recovery system (22) is connected with the waste gas collection tank (15) through the waste gas recycling system condensate collection pipeline A (21), The waste gas collection tank (15) is connected with the air blower (17) through the gas phase air blower pipeline (16), the air blower (17) is connected with the waste gas treatment system (19) through the air blower feeding pipeline (18), and the waste gas treatment system (19) is connected with the condensate recovery system (22) through the waste gas recycling system condensate collection pipeline B (26).

2. The polymer polyol off-gas recovery system of claim 1, wherein: The waste gas collection tank (15) is connected with the vacuum system condensate collection pipeline (24) through the waste gas collection tank condensate feeding pipeline (23).

3. The polymer polyol off-gas recovery system of claim 1, wherein: The configuration tank (1) and the intermediate tank (5) are connected with the configuration tank and the intermediate tank gas phase line B (3) through the configuration tank and the intermediate tank gas phase line A (2), and the configuration tank and the intermediate tank gas phase line B (3) are connected with the waste gas collection tank (15).

4. The polymer polyol off-gas recovery system of claim 1, wherein: The vacuum system (13), the waste gas treatment system (19) and the condensate recovery system (22) are all connected with the gas phase condensation system (20).

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