Reaction heat recycling device for production of high-hydrophobicity polyester polyol

Abstract

The utility model provides a reaction heat recycling device for producing high-hydrophobicity polyester polyol, which relates to the technical field of reaction heat recovery, and comprises a reaction kettle, one side of the reaction kettle is connected with a recovery filter assembly, and the recovery filter assembly comprises a recovery gas pipe. A first valve and a second valve are connected to the surfaces of the two sides of the gas recovery pipe respectively, an auxiliary pipe is connected to the bottom of the gas recovery pipe, and a third valve and a fourth valve are connected to the two sides of the auxiliary pipe respectively. According to the reaction kettle disclosed by the utility model, heat produced by high-hydrophobicity polyester polyol is recycled, impurities in gas can be filtered through the filter screen when the heat gas is circulated through the recycling gas pipe, and the gas can be circulated through the auxiliary pipe when the filter screen on the recycling gas pipe is replaced; normal use is not affected, the overall applicability is improved, and the situation that gas impurities are not filtered, and consequently a recovery gas pipe is blocked is avoided.

Description

Technical Field

[0001] This utility model relates to the field of reaction heat recovery technology, and in particular to a reaction heat recovery and utilization device for the production of highly hydrophobic polyester polyols. Background Technology

[0002] Reactors used for the production of highly hydrophobic polyester polyols need to have characteristics such as high temperature and high pressure resistance, corrosion resistance, strong sealing, high heat transfer efficiency, and precise temperature control. It is recommended to use stainless steel or titanium alloy materials, and equip them with magnetic seals, high-efficiency stirring devices, and multiple heating methods. The volume and structure should be customized according to process requirements. In order to avoid heat waste, a reaction heat recovery device is usually installed.

[0003] As disclosed in announcement CN221802568U, an energy-saving reactor heat recovery device includes a housing. Inside the housing are heat exchange tubes, and outside the heat exchange tubes are cleaning components. The heat exchange tubes have an inlet and an outlet at both ends. A connecting pipe connects to the top of the inlet, and one end of the connecting pipe connects to the reactor. A water inlet pipe and a water outlet pipe are connected to one side of the housing. The cleaning components include a motor mounted on the top of the housing, with a lead screw fixedly connected to the motor's output end. This energy-saving reactor heat recovery device solves the problem that in existing devices, where the heat exchange tubes are inside the housing, scale easily forms on the outer wall of the heat exchange tube bundle, affecting overall heat exchange efficiency. Cleaning the scale on the outer wall of the heat exchange tube bundle usually requires disassembling the heat exchange tube bundle, which is complex and inconvenient.

[0004] This patented technology can clean scale buildup on the outer wall of the heat exchange tube bundle, thereby improving heat exchange efficiency. However, existing devices do not filter impurities inside the gas pipes when recovering heat from the reactor. Over time, impurities accumulate, eventually causing blockages inside the gas pipes and preventing the heat recovery process from being completed. Utility Model Content

[0005] The purpose of this invention is to address the problem that existing devices, when recovering heat from a reactor, do not filter impurities inside the gas pipes. Over time, these impurities accumulate, eventually causing blockages in the gas pipes and preventing the heat recovery process from being completed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a reaction heat recovery and utilization device for the production of highly hydrophobic polyester polyols, comprising a reaction vessel, a recovery filter assembly connected to one side of the reaction vessel, the recovery filter assembly comprising a recovery gas pipe, a first valve and a second valve respectively connected to the two sides of the recovery gas pipe, a secondary pipe connected to the bottom of the recovery gas pipe, a third valve and a fourth valve respectively connected to the two sides of the secondary pipe, a set of filter boxes connected to the surfaces of the recovery gas pipe and the secondary pipe, a filter screen provided inside the filter box, slots provided at the bottom of both sides of the filter screen, a connecting frame connected to the bottom of the filter box, receiving grooves provided inside the two sides of the connecting frame, a bidirectional screw inserted inside the connecting frame, bearings and a throttle connected to the two ends of the bidirectional screw, and two sets of moving blocks symmetrically connected to the surface of the bidirectional screw.

[0007] Furthermore, the movable block is L-shaped, and its position and size match the position and size of the slot.

[0008] Furthermore, the movable block and the slot form an interlocking connection, and the bidirectional screw and both sets of movable blocks form a threaded connection.

[0009] Furthermore, the outer surfaces of both sides of the filter screen are in contact with the inner walls of both sides of the filter box, and a sliding connection is formed between the filter screen and the filter box.

[0010] Furthermore, both the recovery gas pipe and the auxiliary pipe are connected to a monitoring alarm component on the side near the filter box, and the monitoring alarm component includes a flow sensor.

[0011] Furthermore, an alarm is connected to one side of the flow sensor, and the alarm and the flow sensor are electrically connected.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the reactor recovers the heat produced by the highly hydrophobic polyester polyol. When the gas is flowing through the recovery gas pipe, impurities in the gas can be filtered through the filter screen. When the filter screen on the recovery gas pipe is replaced, the gas can also be flowed through the auxiliary pipe without affecting normal use, thus improving the overall applicability and avoiding the situation where gas impurities are not filtered and can easily cause blockage in the recovery gas pipe.

[0014] 2. In this utility model, the flow sensor can monitor the gas flow rate. When the flow rate drops significantly, the alarm will automatically sound to remind the operator to disassemble and replace the filter screen, which improves the convenience and practicality of use. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a reaction heat recovery and utilization device for the production of highly hydrophobic polyester polyols.

[0016] Figure 2 This utility model provides a three-dimensional structural diagram of the recovery gas pipe of a reaction heat recovery and utilization device for the production of highly hydrophobic polyester polyols.

[0017] Figure 3 This utility model provides an exploded structural diagram of the filter box of a reaction heat recovery and utilization device for the production of highly hydrophobic polyester polyols.

[0018] Figure 4 This utility model provides a schematic cross-sectional view of the connecting frame structure of a reaction heat recovery and utilization device for the production of highly hydrophobic polyester polyols.

[0019] Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Legend: 1. Reactor; 2. Recovery Filter Assembly; 201. Recovery Gas Pipe; 202. First Valve; 203. Second Valve; 204. Sub-pipe; 205. Third Valve; 206. Fourth Valve; 207. Filter Box; 208. Filter Screen; 209. Slot; 210. Connecting Frame; 211. Receiving Tank; 212. Bidirectional Screw; 213. Bearing; 214. Throttle; 215. Moving Block; 3. Monitoring and Alarm Assembly; 301. Flow Sensor; 302. Alarm. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, as Figure 1 - Figure 4As shown, this utility model provides a reaction heat recovery and utilization device for the production of highly hydrophobic polyester polyols, including a reaction vessel 1. A recovery filter assembly 2 is connected to one side of the reaction vessel 1. The recovery filter assembly 2 includes a recovery gas pipe 201. A first valve 202 and a second valve 203 are respectively connected to the two sides of the recovery gas pipe 201. A secondary pipe 204 is connected to the bottom of the recovery gas pipe 201. A third valve 205 and a fourth valve 206 are respectively connected to the two sides of the secondary pipe 204. A set of filter boxes 207 are connected to the surfaces of both the recovery gas pipe 201 and the secondary pipe 204. A filter screen 208 is provided inside the filter box 207. Slots 209 are opened on both sides of the bottom of the filter screen 208. The bottom of the filter box 207 is connected to... The connecting frame 210 has receiving grooves 211 on both sides. A bidirectional screw 212 is inserted into the connecting frame 210. The two ends of the bidirectional screw 212 are respectively connected to bearings 213 and handles 214. Two sets of moving blocks 215 are symmetrically connected to the surface of the bidirectional screw 212. The moving blocks 215 are L-shaped. The position and size of the moving blocks 215 match the position and size of the slots 209. The moving blocks 215 and the slots 209 are connected by an insertion. The bidirectional screw 212 and the two sets of moving blocks 215 are connected by threads. The outer surfaces of both sides of the filter screen 208 are in contact with the inner walls of both sides of the filter box 207. The filter screen 208 and the filter box 207 are connected by a sliding connection.

[0024] The overall effect of Embodiment 1 is that when the reactor 1 reacts with the highly hydrophobic polyester polyol, heat is recovered through the recovery gas pipe 201, and water is heated through the tank to achieve the purpose of heat recovery. Impurities in the recovery gas pipe 201 can be filtered and adsorbed by the filter screen 208. When the filter screen 208 is disassembled and cleaned, the first valve 202 and the second valve 203 can be closed, and the third valve 205 and the fourth valve 206 can be opened, so that the hot gas can pass through the secondary pipe 204 without affecting normal use. At the same time, the filter screen 208 on the secondary pipe 204 can also act as a filter component. Then the filter screen 208 on the recovery gas pipe 201 can be disassembled and cleaned. The handle 214 is rotated in the reverse direction to drive the bidirectional screw. Reversing 212 causes the bidirectional screw 212 to rotate in the opposite direction with the two sets of moving blocks 215 simultaneously. This reverse rotation drives the two sets of moving blocks 215 to move to both sides and pull them out of the slots 209 on both sides of the filter screen 208. At this point, the filter screen 208 can be pulled upwards to disassemble and clean it. After that, the cleaned filter screen 208 can be inserted into the filter box 207. Rotating the handle 214 in the forward direction causes the bidirectional screw 212 to rotate in the forward direction, which in turn causes the two sets of moving blocks 215 to move inwards simultaneously and be inserted into the slots 209 for fixation. This improves the overall applicability and avoids the situation where unfiltered gas impurities can easily cause blockage of the recovery gas pipe 201.

[0025] Example 2, as Figure 1 and Figure 5 As shown, monitoring and alarm components 3 are connected to the side of the recovery air pipe 201 and the auxiliary pipe 204 near the filter box 207. The monitoring and alarm components 3 include a flow sensor 301, and an alarm 302 is connected to one side of the flow sensor 301. The alarm 302 and the flow sensor 301 are electrically connected.

[0026] The effect achieved by the entire embodiment 2 is that the flow sensor 301 can monitor the gas flow rate. When the flow rate decreases significantly, the alarm 302 will automatically sound an alarm to remind the operator to disassemble and replace the filter screen 208 in time. This improves the convenience and practicality of use and avoids the problem that the operator will not know in time that the filter screen 208 needs to be disassembled and cleaned, which may affect the use.

[0027] Working principle: Reactor 1 recovers the heat generated by the production of highly hydrophobic polyester polyol. When the heat gas flows through the recovery gas pipe 201, impurities in the gas can be filtered through the filter screen 208. When replacing the filter screen 208 on the recovery gas pipe 201, the gas can also flow through the secondary pipe 204 without affecting normal use, thus improving overall applicability. This avoids the situation where unfiltered gas impurities can easily cause blockage in the recovery gas pipe 201. The flow sensor 301 can monitor the gas flow rate. When the flow rate drops significantly, the alarm 302 will automatically sound an alarm to remind the operator to disassemble and replace the filter screen 208, improving the convenience and practicality of use.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A reaction heat recycling device for producing a highly hydrophobic polyester polyol, comprising a reaction kettle (1), characterized in that: One side of the reaction kettle (1) is connected with a recovery filtering assembly (2); The recovery filtering assembly (2) comprises a recovery air pipe (201), the two side surfaces of the recovery air pipe (201) are respectively connected with a first valve (202) and a second valve (203), the bottom of the recovery air pipe (201) is connected with a branch pipe (204), the two sides of the branch pipe (204) are respectively connected with a third valve (205) and a fourth valve (206), the surfaces of the recovery air pipe (201) and the branch pipe (204) are both connected with a group of filtering boxes (207), the inside of the filtering box (207) is provided with a filter screen (208), the two side bottoms of the filter screen (208) are both provided with a slot (209), the bottom of the filtering box (207) is connected with a connecting frame (210), the two side interiors of the connecting frame (210) are both provided with a containing groove (211), the inside of the connecting frame (210) is inserted with a bidirectional screw rod (212), the two ends of the bidirectional screw rod (212) are respectively connected with a bearing (213) and a handle (214), the surface of the bidirectional screw rod (212) is symmetrically connected with two groups of moving blocks (215).

2. The reaction heat recovery device for producing a highly hydrophobic polyester polyol according to claim 1, characterized by: The shape of the moving block (215) is L-shaped, and the position and size of the moving block (215) are matched with the position and size of the slot (209).

3. The reaction heat recovery device for producing a highly hydrophobic polyester polyol according to claim 2, characterized by: Threaded connections are formed between the bidirectional screw rod (212) and the two groups of moving blocks (215).

4. The reaction heat recovery device for producing a highly hydrophobic polyester polyol according to claim 3, characterized by: The two side outer surfaces of the filter screen (208) are attached to the two side inner walls of the filtering box (207), and the filter screen (208) and the filtering box (207) are in sliding connection.

5. The reaction heat recovery device for producing a highly hydrophobic polyester polyol according to claim 1, characterized by: The recovery air pipe (201) and the branch pipe (204) are both connected with a monitoring alarm assembly (3) on the side close to the filtering box (207), the monitoring alarm assembly (3) comprises a flow sensor (301).

6. The reaction heat recovery device for producing a highly hydrophobic polyester polyol according to claim 5, characterized by: The side of the flow sensor (301) is connected with an alarm (302), and the alarm (302) and the flow sensor (301) are in electrical connection.

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