Comprehensive energy utilization system based on chemical fiber integrated device
By designing multi-stage modules of cold-end and hot-end systems in the integrated chemical fiber device, efficient exchange and recovery of heat energy and cold volume is achieved, and the problem of high energy consumption in chemical fiber production is solved and costs are reduced.
Patent Information
- Application Number
- CN202420884182.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-26
AI Technical Summary
There is a lack of a comprehensive energy utilization system between all links in the integrated chemical fiber device, resulting in high energy consumption and high cost.
A comprehensive energy utilization system based on chemical fiber integrated device was designed, including cold end system and hot end system, through cooling capacity circulation, first- and second-level modules, heat island circulation, first-level and second-level modules, and first-level thermal energy recovery and secondary modules to realize efficient exchange and recycling of heat and cooling capacity, reducing energy consumption.
It improves energy utilization, reduces energy consumption and production costs of chemical fiber production, and realizes the rational allocation and utilization of heat energy and cooling capacity.
Smart Images
Figure CN222257252U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fine chemical industry, in particular to an energy comprehensive utilization system based on a chemical fiber integrated device. Background Art
[0002] Chemical fiber integrated device refers to the intensive production device used for refining, polyester, spinning and its supporting auxiliaries. At present, for the textile industry, especially the chemical fiber textile industry, the general industry regionalization and differentiation are significant, and the upstream and downstream supporting and comprehensive energy utilization of enterprises are discrete and low. For chemical fiber integrated devices, there is no system that can comprehensively utilize the energy between various links, so the energy consumption is still relatively large and the cost is high. Utility Model Content
[0003] In order to solve the above technical deficiencies, the utility model provides an energy comprehensive utilization system based on a chemical fiber integrated device, which can effectively improve the energy utilization rate in the chemical fiber production process and reduce costs.
[0004] The utility model discloses an energy comprehensive utilization system based on a chemical fiber integrated device, including a cold end system and a hot end system, wherein the cold end system includes a first-level cold cycle module and a second-level cold cycle module, and the hot end system includes a first-level heat island cycle module, a second-level heat island cycle module, a first-level heat energy recovery module, a second-level heat energy recovery module and a third-level heat energy recovery module;
[0005] The first-level module of the cold cycle is a heat exchange device, which is connected to the refrigerant pipeline and the low-boiling-point pipeline respectively, and is used for heat exchange between the refrigerant and the low-boiling-point, and the refrigerant is liquid nitrogen;
[0006] The secondary module of the cold cycle is also a heat exchange device, and the secondary module of the cold cycle is connected to the low-boiling material pipeline and the cooling medium pipeline respectively, and is used for heat exchange between the low-boiling material cooled by the primary module of the cold cycle and the cooled medium, wherein the cooled medium is the raw material of the catalyst and its low-temperature compound that needs to be prepared at low temperature, or the raw material of the reactant that needs to maintain the reaction temperature of 0°C to 15°C for low-temperature polymerization;
[0007] The heat island cycle primary module is a heat exchange device, and the heat island cycle primary module is connected to the waste heat boiler high-pressure steam pipeline and the high-temperature heat medium pipeline respectively, and the high-temperature heat medium is heat transfer oil or high-pressure water pressurized by nitrogen;
[0008] The heat island circulation secondary module is a heat exchange device, and the heat island circulation secondary module is respectively connected to the high-temperature heat medium pipeline and the temperature control medium pipeline, and is used for heat exchange between the high-temperature heat medium heated by the heat island circulation primary module and the temperature control medium, and the temperature control medium is used for temperature control of the esterification reaction, phosphating reaction, sulfonation, and distillation processes;
[0009] The heat recovery primary module is a steam-water flash evaporator, which is connected to the high-pressure steam pipeline of the waste heat boiler downstream of the heat island cycle primary module, and is used to separate the high-pressure condensate of the waste heat boiler generated by the heat island cycle primary module into steam and water to generate medium-pressure steam;
[0010] The heat recovery secondary module is a heat exchange device, which is respectively connected to the medium-pressure steam pipeline and the high-pressure water pipeline generated by the heat recovery primary module, and is used for heat exchange between the medium-pressure steam and the high-pressure water, and the high-pressure water provides a heat source for surfactant synthesis;
[0011] The heat recovery tertiary module is a steam-water flash evaporator, which is connected to the medium-pressure steam pipeline downstream of the heat recovery secondary module, and is used to separate steam and water from the medium-pressure steam condensate generated by the heat recovery secondary module to generate low-pressure steam;
[0012] The low-pressure steam pipeline is connected to the chemical fiber integration device.
[0013] It also includes a hot water system and an integrated liquid level regulating module. The low-pressure steam acts on the chemical fiber integrated device to generate low-pressure condensate, and the low-pressure condensate is recovered in the hot water system. The hot water system is used to control the temperature of esterification reaction, phosphation reaction, sulfonation reaction and distillation process; the integrated liquid level regulating module is respectively connected to the first-level heat energy recovery module, the second-level heat energy recovery module, the third-level heat energy recovery module and the hot water system.
[0014] The utility model provides an energy comprehensive utilization system based on the chemical fiber integrated device, which can reasonably distribute and utilize the heat energy and cold energy in the production process to achieve efficient utilization of energy, high comprehensive utilization rate, reduce the energy consumption of the chemical fiber integrated device, and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structural connection of the utility model. DETAILED DESCRIPTION
[0016] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.
[0017] Embodiment 1:
[0018] like Figure 1As shown, the utility model discloses an energy comprehensive utilization system based on a chemical fiber integrated device, including a cold end system and a hot end system, wherein the cold end system includes a first-level cold cycle module and a second-level cold cycle module, and the hot end system includes a first-level heat island cycle module, a second-level heat island cycle module, a first-level heat energy recovery module, a second-level heat energy recovery module, and a third-level heat energy recovery module;
[0019] The first-level module of the cold cycle is a heat exchange device, which is connected to the refrigerant pipeline and the low-boiling-point pipeline respectively, and is used for heat exchange between the refrigerant and the low-boiling point. The refrigerant is liquid nitrogen; the low-boiling point can be dangerous chemicals such as ethylene oxide, propylene oxide, butylene oxide, methanol, styrene, methyl chloride, trimethylamine, triethylamine and other chemicals that must be operated at low temperatures, and its operating conditions are -80-15°C. Liquid nitrogen and low-boiling points are heat exchanged in the heat exchange device to reduce the temperature of the low-boiling point, so that its temperature is at a relatively low value within the operating condition range, so that it can exchange heat with the cooling medium of the second-level module of the cold cycle, the temperature of the low-boiling point can be relatively increased, and the temperature of the cooling medium can be relatively reduced to a reasonable value.
[0020] The secondary module of cold cycle is also a heat exchange device. The secondary module of cold cycle is connected to the low-boiling material pipeline and the cooling medium pipeline respectively, and is used for heat exchange between the low-boiling material after cooling by the primary module of cold cycle and the cooled medium, wherein the cooled medium is the raw material of the catalyst and its low-temperature compound that needs to be prepared at low temperature or the raw material of the reactant that needs to maintain the reaction temperature of 0℃~15℃ for low-temperature polymerization; the secondary module of cold cycle is connected to the low-boiling material pipeline, so that the low-boiling material that passes through the primary module of cold cycle enters the secondary module of cold cycle, and exchanges heat with the cooling medium, so that the temperature of the low-boiling material increases and the temperature of the cooling medium decreases. The catalyst that needs to be prepared at low temperature can be a rare earth catalyst or an alkyl aluminum catalyst.
[0021] The secondary module of cold capacity circulation can also be connected to the refrigerant system. After the low-boiling substance exchanges heat with the cooling medium, if there is excess cold, it can exchange heat with the refrigerant system. The cold capacity is stored in the refrigerant system. The refrigerant can be low-temperature brine, ethylene glycol aqueous solution, etc., which is used as the cooling medium for the epoxide storage area.
[0022] Under normal circumstances, the operating conditions of low-boiling substances are -80 to 15°C, while the temperature of liquid nitrogen is between -200 and -180°C. Therefore, after the low-boiling substances and liquid nitrogen are fully heat exchanged in the first-level module of the cold cycle, the temperature of the low-boiling substances is generally between -65 and -5°C, which is at the lower end of the operating range of low-boiling substances. Therefore, the low-boiling substances cooled by liquid nitrogen can be transported to the second-level module of the cold cycle to exchange heat with the cooling medium, so that the temperature of the cooling medium is reduced to -20 to 25°C, while the temperature of the low-boiling substances is relatively increased to -15 to 15°C. In this way, no additional cooling equipment is required, and only the cold capacity of liquid nitrogen is needed to cool the low-boiling substances and the cooling medium to the required operating temperature range.
[0023] The heat island cycle primary module is a heat exchange device, which is connected to the waste heat boiler high-pressure steam pipeline and the high-temperature heat medium pipeline respectively. The high-temperature heat medium is heat transfer oil or high-pressure water pressurized by nitrogen; the high-pressure steam in the waste heat boiler high-pressure steam pipeline is high temperature and serves as a heat source. The waste heat boiler is a component of the chemical fiber integration device. After the high-pressure steam of about 3.9MPa exchanges heat with the high-temperature heat medium in the high-temperature heat medium pipeline, the high-temperature heat medium can be heated to 250-270°C. At the same time, a waste heat boiler high-pressure condensate will be formed in the waste heat boiler high-pressure steam pipeline, and its temperature is between 200 and 205°C.
[0024] The heat island circulation secondary module is a heat exchange device. The heat island circulation secondary module is respectively connected to the high-temperature heat medium pipeline and the temperature control medium pipeline, and is used for heat exchange between the high-temperature heat medium heated by the heat island circulation primary module and the temperature control medium. The temperature control medium is used to control the temperature of the esterification reaction, phosphation reaction, sulfonation, and distillation process; the temperature of the high-temperature heat medium after heat exchange in the heat island circulation primary module is between 250 and 270°C. After entering the heat island circulation secondary module, it exchanges heat with the temperature control medium, wherein the temperature control medium can be hot water in the hot water system, hot water in the comprehensive liquid level regulation module, and low-pressure condensate generated by the heat energy recovery tertiary module, etc. After heat exchange, it is used for heating the esterification reaction, phosphation reaction, sulfonation reaction, distillation process, etc. with an operating temperature between 210 and 240°C.
[0025] The first-level heat recovery module is a steam-water flash evaporator, which is connected to the high-pressure steam pipeline of the waste heat boiler downstream of the first-level heat island cycle module, and is used to separate steam and water from the high-pressure condensate of the waste heat boiler generated by the first-level heat island cycle module to generate medium-pressure steam; the first-level heat recovery module separates steam and water from the high-pressure condensate of the waste heat boiler to form medium-pressure steam of about 1.4MPa.
[0026] The heat recovery secondary module is a heat exchange device, which is respectively connected to the medium-pressure steam pipeline and the high-pressure water pipeline generated by the heat recovery primary module, and is used for heat exchange between the medium-pressure steam and the high-pressure water of about 1.0 to 1.5 MPa, and the high-pressure water provides a heat source for the synthesis of surfactants;
[0027] After the medium-pressure steam enters the secondary heat recovery module through the pipeline, it exchanges heat with the high-pressure water in the high-pressure water pipeline to generate medium-pressure steam condensate with a temperature of 140-150°C, while the temperature of the high-pressure water after heating is 130-185°C. The high-pressure water is used to provide a heat source for the synthesis of surfactants, and the synthesis operating temperature of the surfactants is 120-170°C. The high-pressure water can be combined with the water in the hot water system to adjust the temperature to the required level.
[0028] The heat recovery tertiary module is a steam-water flash evaporator, which is connected to the medium-pressure steam pipeline downstream of the heat recovery secondary module, and is used to separate steam and water from the medium-pressure steam condensate generated by the heat recovery secondary module to generate low-pressure steam of about 0.3-0.35MPa;
[0029] The low-pressure steam pipeline is connected to the chemical fiber integration device.
[0030] Low-pressure steam is used in chemical fiber integrated devices. It can be used as a heat source for solid raw materials used in surfactant production, a heat source for heating liquid products in surfactant production, and a heat source for drying and slicing surfactant products. After heat exchange, low-pressure steam forms low-pressure condensate with a temperature of 80-95°C. It can be used as a heat source for heating, raw material heating, and heat preservation in surfactant production devices. Of course, it can also directly enter the hot water system. The temperature of the low-pressure condensate after heat exchange is 25-45°C, and it can enter the hot water system as make-up water.
[0031] It also includes a hot water system and a comprehensive liquid level adjustment module. The low-pressure steam acts on the chemical fiber integration device to produce low-pressure condensate, which is recovered in the hot water system. The hot water system is used to control the temperature of the esterification reaction, phosphating reaction, sulfonation reaction, and distillation process. The comprehensive liquid level adjustment module is connected to the heat recovery primary module, the heat recovery secondary module, the heat recovery tertiary module, and the hot water system. The water in the hot water system is adjusted with the high-pressure water after heat exchange in the heat recovery secondary module to reach the required temperature.
[0032] The hot water separated from the steam-water separation process in the heat recovery primary module and the heat recovery secondary module is collected in the comprehensive liquid level control module and connected to the hot water system to replenish and adjust the water volume of the hot water system. The water in the hot water system can also be supplied to the esterification reaction, phosphating reaction, sulfonation reaction, and distillation process for temperature control, and can also be used to heat the raw materials of the reactants that need to maintain the reaction temperature at 0℃~15℃ for low-temperature polymerization.
[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be an interactive relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0035] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0036] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simplified modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. An energy comprehensive utilization system based on a chemical fiber integrated device, characterized by: It includes a cold end system and a hot end system, wherein the cold end system includes a first-level cold cycle module and a second-level cold cycle module, and the hot end system includes a first-level heat island cycle module, a second-level heat island cycle module, a first-level heat energy recovery module, a second-level heat energy recovery module, and a third-level heat energy recovery module; The first-level module of the cold cycle is a heat exchange device, which is connected to the refrigerant pipeline and the low-boiling-point pipeline respectively, and is used for heat exchange between the refrigerant and the low-boiling-point, and the refrigerant is liquid nitrogen; The secondary module of the cold cycle is also a heat exchange device, and the secondary module of the cold cycle is connected to the low-boiling material pipeline and the cooling medium pipeline respectively, and is used for heat exchange between the low-boiling material cooled by the primary module of the cold cycle and the cooled medium, wherein the cooled medium is the raw material of the catalyst and its low-temperature compound that needs to be prepared at low temperature, or the raw material of the reactant that needs to maintain the reaction temperature of 0°C to 15°C for low-temperature polymerization; The heat island cycle primary module is a heat exchange device, and the heat island cycle primary module is connected to the waste heat boiler high-pressure steam pipeline and the high-temperature heat medium pipeline respectively, and the high-temperature heat medium is heat transfer oil or high-pressure water pressurized by nitrogen; The heat island circulation secondary module is a heat exchange device, and the heat island circulation secondary module is respectively connected to the high-temperature heat medium pipeline and the temperature control medium pipeline, and is used for heat exchange between the high-temperature heat medium heated by the heat island circulation primary module and the temperature control medium, and the temperature control medium is used for temperature control of the esterification reaction, phosphating reaction, sulfonation, and distillation processes; The heat recovery primary module is a steam-water flash evaporator, which is connected to the high-pressure steam pipeline of the waste heat boiler downstream of the heat island cycle primary module, and is used to separate the high-pressure condensate of the waste heat boiler generated by the heat island cycle primary module into steam and water to generate medium-pressure steam; The heat recovery secondary module is a heat exchange device, which is respectively connected to the medium-pressure steam pipeline and the high-pressure water pipeline generated by the heat recovery primary module, and is used for heat exchange between the medium-pressure steam and the high-pressure water, and the high-pressure water provides a heat source for surfactant synthesis; The heat recovery tertiary module is a steam-water flash evaporator, which is connected to the medium-pressure steam pipeline downstream of the heat recovery secondary module, and is used to separate steam and water from the medium-pressure steam condensate generated by the heat recovery secondary module to generate low-pressure steam; The low-pressure steam pipeline is connected to the chemical fiber integration device.
2. The energy comprehensive utilization system based on the chemical fiber integrated device according to claim 1 is characterized in that: It also includes a hot water system and an integrated liquid level regulating module. The low-pressure steam acts on the chemical fiber integrated device to generate low-pressure condensate, and the low-pressure condensate is recovered in the hot water system. The hot water system is used to control the temperature of esterification reaction, phosphation reaction, sulfonation reaction and distillation process; the integrated liquid level regulating module is respectively connected to the first-level heat energy recovery module, the second-level heat energy recovery module, the third-level heat energy recovery module and the hot water system.