Device of filter for producing polymer polyol
By designing a device that includes reactor, filter, waste liquid tight discharge pipeline and waste gas recovery pipeline, nitrogen purge and induced fans are used to extract toxic substances, the toxic liquid and gas leakage in the polymer polyol production process is solved. The problem is to achieve dual protection of operators and environment.
Patent Information
- Application Number
- CN202420910944.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-04-28
AI Technical Summary
During the polymer polyol production process, the toxic liquids and gases in the filter are prone to leak when replacing the filter bag, resulting in health hazards for operators and environmental pollution.
A device including reactor, filter, waste liquid tight discharge pipeline and waste gas recovery pipeline was designed. The toxic substances were pumped away by nitrogen purge and induced fans through the liquid phase and gas phase pipelines, and sent to the tight discharge and treatment system. .
It effectively reduces the risk of operators being exposed to toxic media when replacing filter bags, reduces environmental pollution, and improves the safety of the workplace.
Smart Images
Figure CN222510718U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of polymer polyols, in particular to a filter device used for producing polymer polyols. Background Art
[0002] During the production process of polymer polyols (POPs), a certain amount of polymer particles will be generated due to the self-polymerization of some monomers or other reasons. These polymer particles are usually separated from the product after being filtered by a filter and stored in the filter bag of the filter. As the number of particles in the filter bag increases, the flow rate at the filter outlet becomes lower and lower. In order not to affect the stable operation of production, the spare filter is usually switched regularly, and the filter offline needs to be manually replaced. When the filter is opened, unreacted monomers such as styrene and acrylonitrile and other toxic substances will escape from the original closed state. Therefore, in the process of replacing the filter bag, the operator needs to wear protective clothing to avoid harming human health after inhalation and contact with the skin as much as possible. In the original process route, the operator only relies on wearing protective equipment for isolation, and the gas phase toxic substances and liquid phase toxic substances in the filter are not effectively isolated and are completely exposed to the work site. When the operator works for a long time under high concentration of toxic media, the protective clothing may be damaged, which is not conducive to occupational health and hygiene. For this purpose, a filter device for producing polymer polyols is provided. Utility Model Content
[0003] The purpose of the utility model is to provide a filter device for producing polymer polyols in view of the defects of the prior art, so as to solve the problems raised by the above-mentioned background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a device for a filter used in the production of polymer polyols, comprising a reactor, a filter connected to the bottom of the reactor, a waste liquid close-draining pipeline connected to the bottom of the filter, and a waste gas recovery pipeline connected to the top of the filter.
[0005] As a preferred technical solution of the utility model, the waste liquid close-drain pipeline is connected to a liquid phase pipeline nitrogen purge pipeline.
[0006] As a preferred technical solution of the utility model, an electromagnetic valve is installed on the liquid phase pipeline nitrogen purge pipeline.
[0007] As a preferred technical solution of the utility model, the exhaust gas recovery pipeline is connected to the induced draft fan, and the induced draft fan is also connected to the exhaust gas treatment system through the exhaust gas conveying pipeline.
[0008] As a preferred technical solution of the utility model, the exhaust gas delivery pipeline is connected to a nitrogen purge pipeline on the gas phase pipeline, and a pressure controller is installed on the nitrogen purge pipeline.
[0009] As a preferred technical solution of the present utility model, the pressure controller is electrically connected to the regulating valve on the exhaust gas delivery pipeline.
[0010] As a preferred technical solution of the utility model, regulating valves and check valves are installed on the waste liquid tight drainage pipeline and the waste gas delivery pipeline.
[0011] Compared with the prior art, the utility model has the following beneficial effects: by pressing the toxic liquid in the filter bag into the close-packed system and extracting the toxic gas in the filter bag with an induced draft fan, the double means are used to reduce the harm to the health of operators caused by toxic substances in the gas and liquid phases at the filter bag replacement operation site, and at the same time, the harm to the environment can also be effectively reduced.
[0012] Check valves are added to both gas and liquid pipelines to effectively prevent backflow.
[0013] Effectively reduce the concentration of toxic media in the workplace, and avoid direct contact with high-concentration harmful media even in the event of an abnormal situation.
[0014] A new nitrogen pipeline is added to the gas phase pipeline, and a pressure control device is installed on the nitrogen pipeline to prevent abnormal pressure in the induced draft fan outlet pipeline and avoid toxic gas from flowing back to the work site. At the same time, when the induced draft fan stops working, materials in the gas phase pipeline may accumulate and may cause harm. Therefore, when the fan stops working, the nitrogen pipeline will continue to be purged for a certain period of time; a new nitrogen purge pipeline is added to the liquid phase pipeline to blow away the residual liquid in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model.
[0016] In the figure: 1-reactor; 2-waste liquid close-drain pipeline; 3-filter; 4-induced draft fan; 5-waste gas recovery pipeline; 6-regulating manual valve; 7-check valve; 8-nitrogen purge pipeline on gas phase pipeline; 9-nitrogen purge pipeline on liquid phase pipeline; 10-waste gas delivery pipeline; 11-pressure controller. DETAILED DESCRIPTION
[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0018] Example: See Figure 1The utility model provides a technical solution: a filter device for producing polymer polyols, comprising a reactor 1, a filter 3 is connected to the bottom of the reactor 1, a waste liquid close-draining pipeline 2 is connected to the bottom of the filter 3, and a waste gas recovery pipeline 5 is connected to the top of the filter 3.
[0019] The waste liquid tight discharge pipeline 2 is connected to a liquid phase pipeline nitrogen purge pipeline 9 .
[0020] An electromagnetic valve is installed on the liquid phase pipeline nitrogen purge pipeline 9.
[0021] The exhaust gas recovery pipeline 5 is connected to the induced draft fan 4, and the induced draft fan 4 is also connected to the exhaust gas treatment system through the exhaust gas conveying pipeline 10.
[0022] The waste gas delivery pipeline 10 is connected to a nitrogen purge pipeline 8 on the gas phase pipeline, and a pressure controller 11 is installed on the nitrogen purge pipeline 8 .
[0023] The pressure controller 11 is electrically connected to the regulating valve 6 on the exhaust gas delivery pipeline 10 .
[0024] A regulating valve 6 and a check valve 7 are installed on the waste liquid tight drainage pipeline 2 and the waste gas delivery pipeline 10.
[0025] Working principle: A device for producing filters for polymer polyols. In order to minimize the harm to workers during the process of replacing filter bags, a waste liquid close-drain pipeline 2 is added to the bottom of the filter 3. When the filter that needs to replace the filter bag is offline, it is necessary to use the liquid phase pipeline nitrogen purge pipeline 9 to use nitrogen to purge the toxic liquid in the filter 3 through the waste liquid close-drain pipeline 2 as much as possible into the close-drain system. The toxic liquid is sent to the waste liquid treatment system through the close-drain system for treatment. At the same time, the induced draft fan 4 is turned on, and the amount of waste gas drawn by the induced draft fan is adjusted by the regulating valve 6. After being drawn by the induced draft fan 4, the waste gas is transported to the waste gas delivery pipeline 10 through the waste gas recovery pipeline 5, and then sent to the waste gas treatment system for treatment.
[0026] By pressing the toxic liquid in the filter bag into the close-packed system and extracting the toxic gas in the filter bag with an induced draft fan, this dual approach can reduce the health hazards of toxic substances in the gas and liquid phases at the filter bag replacement site to operators, and can also effectively reduce the harm to the environment.
[0027] The waste gas recovery pipeline 5 and the waste liquid tight drainage pipeline 2 are both equipped with a check valve 7, which can effectively prevent backflow.
[0028] Effectively reduce the concentration of toxic media in the workplace, and avoid direct contact with high-concentration harmful media even in the event of an abnormal situation.
[0029] A nitrogen purge pipeline 8 is newly added to the gas phase pipeline on the waste gas conveying pipeline 10. At the same time, a pressure control device is set on the nitrogen purge pipeline on the gas phase pipeline to prevent abnormal pressure in the outlet pipeline of the induced draft fan and avoid toxic gas from flowing back to the work site. At the same time, when the induced draft fan stops working, materials in the gas phase pipeline may accumulate, which may also cause harm. Therefore, when the fan stops working, the nitrogen pipeline will continue to be used for purging for a certain period of time; a new liquid phase pipeline nitrogen purge pipeline 9 is newly added to the waste liquid drainage pipeline 2 to blow away the residual liquid in the pipeline.
[0030] The above embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A filter device for producing polymer polyols, comprising a reactor (1), characterized in that: The bottom of the reactor (1) is connected to a filter (3), the bottom of the filter (3) is connected to a waste liquid close-drain pipeline (2), and the top of the filter (3) is connected to a waste gas recovery pipeline (5); The waste liquid tight-drain pipeline (2) is connected to a liquid phase pipeline nitrogen purge pipeline (9); the waste gas recovery pipeline (5) is connected to an induced draft fan (4), and the induced draft fan (4) is also connected to a waste gas treatment system via a waste gas delivery pipeline (10); and a regulating valve (6) and a check valve (7) are installed on both the waste liquid tight-drain pipeline (2) and the waste gas delivery pipeline (10).
2. The device for producing a filter for polymer polyols according to claim 1, characterized in that: The liquid phase pipeline nitrogen purge pipeline (9) is installed with an electromagnetic valve.
3. The filter device for producing polymer polyols according to claim 1, characterized in that: The waste gas delivery pipeline (10) is connected to a nitrogen purge pipeline (8) on the gas phase pipeline, and a pressure controller (11) is installed on the nitrogen purge pipeline (8).
4. The device for producing a filter for polymer polyols according to claim 3, characterized in that: The pressure controller (11) is electrically connected to the regulating valve (6) on the exhaust gas delivery pipeline (10).