Heat conduction water temperature control system for ethoxylation reaction
By adopting a thermal water temperature control system in the ethoxylation reaction, using the heat exchange between hot water and cold water, the problem of unstable temperature control is solved, the reaction accuracy and thermal energy utilization rate are improved, and production costs and energy waste are reduced. .
Patent Information
- Application Number
- CN202420764280.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-12
AI Technical Summary
The temperature control is unstable during the ethoxylation reaction, resulting in an increase in by-products and a low product yield.
A thermal water temperature control system is designed, including hot water and cold water heat exchange parts, which can exchange heat with the reaction system through high- and low-temperature heat exchangers, and use control valves to switch the use of hot water and cold water to ensure the accuracy of the reaction temperature. control.
The temperature control accuracy of the ethoxylation reaction is improved, production costs are reduced, steam and circulating water are used, and waste is reduced through heat energy recovery.
Smart Images
Figure CN222259913U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ethoxylation reaction, and in particular relates to a hot water temperature control system for ethoxylation reaction. Background Art
[0002] Ethoxylation is the most important technology for producing nonionic surfactants. Ethoxylates are produced by the reaction of ethylene oxide with organic compounds containing active hydrogen under the action of a catalyst. Ethoxylated surfactants have excellent biodegradability and adaptability to hard water. They are widely used in washing synthetic fibers and low-temperature washing, and therefore have a dominant position in nonionic surfactants. In the early stage of the ethoxylation reaction, heating is required to promote the reaction, and after the reaction is carried out, the temperature needs to be lowered to control the reaction rate. The existing ethoxylation reaction temperature control is unstable, which affects the reaction, resulting in an increase in by-products and a low product yield. Utility Model Content
[0003] In order to solve the above technical problems, the technical scheme adopted by the utility model is: a hot water temperature control system for ethoxylation reaction, wherein the ethoxylation reaction is carried out in a reaction system, the hot water temperature control system comprises a hot water tank, the hot water tank is filled with hot water, a return port and a water outlet are arranged on the hot water tank, the water outlet is connected with a water outlet pipe, a circulation pump is installed on the water outlet pipe, the water outlet pipe is connected with a hot water heat exchange part and a cold water heat exchange part through a three-way pipe, the hot water heat exchange part comprises a hot water pipeline and a hot water heater and a high-temperature heat exchanger sequentially installed on the hot water pipeline, the head end of the hot water pipeline is connected with the three-way pipe, and the end of the hot water pipeline is connected with the return port, the cold water heat exchange part comprises a cold water pipeline and a hot water cooler and a low-temperature heat exchanger sequentially installed on the cold water pipeline, the head end of the cold water pipeline is connected with the three-way pipe, and the end of the cold water pipeline is connected with the return port, a plurality of control valves are respectively installed on the water outlet pipe, the hot water pipeline and the cold water pipeline, and the high-temperature heat exchanger and the low-temperature heat exchanger respectively perform heat exchange with the reaction system.
[0004] As a preferred embodiment of the above technical solution, the hot water pipeline is provided with a first control valve, a second control valve and a third control valve in sequence, the hot water heater is located between the first control valve and the second control valve, the high-temperature heat exchanger is located between the second control valve and the third control valve, the cold water pipeline is provided with a fourth control valve, a fifth control valve and a sixth control valve, the hot water cooler is located between the fourth control valve and the fifth control valve, and the low-temperature heat exchanger is located between the fifth control valve and the sixth control valve.
[0005] As a preferred embodiment of the above technical solution, the hot water pipe is connected to a hot water return pipe, the hot water return pipe is connected to the return port, a seventh control valve is provided on the hot water return pipe, and the connection between the hot water return pipe and the hot water pipe is located between the hot water heater and the second control valve; the cold water pipe is connected to a cold water return pipe, the cold water return pipe is connected to the return port, an eighth control valve is provided on the cold water return pipe, and the connection between the cold water return pipe and the cold water pipe is located between the hot water cooler and the fifth control valve.
[0006] As a preferred embodiment of the above technical solution, the water heater includes a first heat-conducting coil, both ends of which are respectively connected to hot water pipes, and the first heat-conducting coil is located in a heating box, and the heating box is filled with circulating hot steam.
[0007] As a preferred embodiment of the above technical solution, the water cooler includes a second heat-conducting coil, both ends of the second heat-conducting coil are respectively connected to cold water pipes, the second heat-conducting coil is located in a cooling box, and the cooling box is filled with circulating cooling water.
[0008] The beneficial effects of the utility model are: first, the temperature control accuracy during the ethoxylation reaction can be improved, and over-temperature phenomenon will not occur, thereby better controlling potential safety hazards and ensuring the smooth operation of the device; second, the production cost can be reduced, and the reaction temperature is stable after temperature control, which greatly reduces the use of steam and circulating water; third, the heat energy generated by a large amount of reaction after temperature control is reused through heat exchanger, which is conducive to promoting heat recovery and reducing the waste of heat energy and waste of hot water. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0010] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0011] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0012] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0013] like Figure 1 As shown, a hot water temperature control system for ethoxylation reaction, the ethoxylation reaction is carried out in a reaction system 1, the hot water temperature control system comprises a hot water tank 2, the hot water tank 2 is filled with hot water, the hot water tank 2 is provided with a return port and a water outlet, the water outlet is connected to a water outlet pipe 3, a circulating pump 4 is installed on the water outlet pipe 3, the water outlet pipe 3 is connected to a hot water heat exchange part and a cold water heat exchange part through a three-way pipe 11, the hot water heat exchange part comprises a hot water pipe 5 and a hot water heater 6 and a high pressure water heater 7 which are sequentially installed on the hot water pipe 5 The hot water pipe 5 is connected to a three-way pipe 11 at the head end, and the end of the hot water pipe 5 is connected to the return port. The cold water heat exchange part includes a cold water pipe 8 and a hot water cooler 9 and a low-temperature heat exchanger 10 installed on the cold water pipe 8 in sequence. The head end of the cold water pipe 8 is connected to the three-way pipe 11, and the end of the cold water pipe 8 is connected to the return port. Several control valves are installed on the outlet pipe 3, the hot water pipe 5 and the cold water pipe 8, respectively. The high-temperature heat exchanger 7 and the low-temperature heat exchanger 10 are heat exchanged with the reaction system 1 respectively. The reaction system 1 generally includes a reactor, and the high-temperature heat exchanger 7 and the low-temperature heat exchanger 10 are respectively installed in the reactor. In the pre-reaction stage of the ethoxylation reaction, the hot water heat exchange part is used to heat the reactants of the reaction system 1 to promote the pre-reaction stage. When the ethoxylation reaction is carried out normally and the material needs to be cooled, due to the heat release during the reaction process, the cold water heat exchange part is used to take away the heat in the reactor to prevent the temperature in the reactor from being too high.
[0014] Furthermore, the hot water pipe 5 is provided with a first control valve 12, a second control valve 13 and a third control valve 14 in sequence, the hot water heater 6 is located between the first control valve 12 and the second control valve 13, the high temperature heat exchanger 7 is located between the second control valve 13 and the third control valve 14, the cold water pipe 8 is provided with a fourth control valve 15, a fifth control valve 16 and a sixth control valve 17, the hot water cooler 9 is located between the fourth control valve 15 and the fifth control valve 16, and the low temperature heat exchanger 10 is located between the fifth control valve 16 and the sixth control valve 17. The hot water heat exchange part and the cold water heat exchange part are switched to work by the above control valves.
[0015] Further, the hot water pipe 5 is connected with a hot water return pipe 18, the hot water return pipe 18 is connected to the return port, the hot water return pipe 18 is provided with a seventh control valve 19, the connection between the hot water return pipe 18 and the hot water pipe 5 is located between the hot water heater 6 and the second control valve 13, the cold water pipe 8 is connected with a cold water return pipe 20, the cold water return pipe 20 is connected to the return port, the cold water return pipe 20 is provided with an eighth control valve 21, and the connection between the cold water return pipe 20 and the cold water pipe 8 is located between the hot water cooler 9 and the fifth control valve 16. When the reaction system 1 does not need high-temperature hot water for heat exchange and heating of the reactants, the second control valve 13 is closed, the seventh control valve 19 is opened, the hot water heater 6 is closed, and the water in the hot water pipe 5 is returned to the hot water tank 2. When the reaction system 1 does not need low-temperature hot water, the fifth control valve 16 is closed, the eighth control valve 21 is opened, and the cold water return pipe 20 is used to recover the excess water in the cold water pipe 8 to the hot water tank 2.
[0016] Furthermore, the water heater 6 includes a first heat-conducting coil, both ends of which are connected to the hot water pipe 5, and the first heat-conducting coil is located in a heating box, and the heating box is filled with circulating hot steam. The hot steam is used to heat the water. Other heating methods in the prior art may also be used instead.
[0017] Furthermore, the water cooler 9 includes a second heat-conducting coil, both ends of which are connected to a cold water pipe 8, and the second heat-conducting coil is located in a cooling box, and circulating cooling water is filled in the cooling box. The circulating cooling water uses a liquid supply refrigerator to provide constant temperature cooling water. This embodiment only provides a way to cool the water, and other technical means in the prior art can also be used to cool the water.
[0018] It is worth mentioning that the technical features such as high-temperature heat exchangers and low-temperature heat exchangers involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field, and should not be regarded as the invention point of this utility model patent. This utility model patent will not be further elaborated.
[0019] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the utility model on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A water-conducting temperature control system for ethoxylation reaction, wherein the ethoxylation reaction is carried out in a reaction system, characterized in that: The hot water temperature control system includes a hot water tank, in which hot water is filled, a return port and a water outlet are provided on the hot water tank, the water outlet is connected to a water outlet pipe, a circulation pump is installed on the water outlet pipe, and the water outlet pipe is connected to a hot water heat exchange part and a cold water heat exchange part through a three-way pipe. The hot water heat exchange part includes a hot water pipe and a hot water heater and a high-temperature heat exchanger installed on the hot water pipe in sequence, the head end of the hot water pipe is connected to the three-way pipe, and the end of the hot water pipe is connected to the return port. The cold water heat exchange part includes a cold water pipe and a hot water cooler and a low-temperature heat exchanger installed on the cold water pipe in sequence, the head end of the cold water pipe is connected to the three-way pipe, and the end of the cold water pipe is connected to the return port. A number of control valves are installed on the water outlet pipe, the hot water pipe and the cold water pipe, respectively, and the high-temperature heat exchanger and the low-temperature heat exchanger respectively perform heat exchange with the reaction system.
2. The hot water temperature control system for ethoxylation reaction according to claim 1, characterized in that: The hot water pipeline is provided with a first control valve, a second control valve and a third control valve in sequence, the hot water heater is located between the first control valve and the second control valve, the high-temperature heat exchanger is located between the second control valve and the third control valve, the cold water pipeline is provided with a fourth control valve, a fifth control valve and a sixth control valve, the hot water cooler is located between the fourth control valve and the fifth control valve, and the low-temperature heat exchanger is located between the fifth control valve and the sixth control valve.
3. The hot water temperature control system for ethoxylation reaction according to claim 2, characterized in that: The hot water pipe is connected to a hot water return pipe, which is connected to the return water port. The hot water return pipe is provided with a seventh control valve. The connection between the hot water return pipe and the hot water pipe is located between the hot water heater and the second control valve. The cold water pipe is connected to a cold water return pipe, which is connected to the return water port. The cold water return pipe is provided with an eighth control valve. The connection between the cold water return pipe and the cold water pipe is located between the hot water cooler and the fifth control valve.
4. The hot water temperature control system for ethoxylation reaction according to claim 3, characterized in that: The water heater comprises a first heat-conducting coil, both ends of which are respectively connected to hot water pipes. The first heat-conducting coil is located in a heating box, and circulating hot steam is filled in the heating box.
5. The hot water temperature control system for ethoxylation reaction according to claim 4, characterized in that: The water cooler comprises a second heat-conducting coil, both ends of which are connected to cold water pipes respectively. The second heat-conducting coil is located in a cooling box, and circulating cooling water is filled in the cooling box.