Chloromethane vaporization refrigeration energy-saving and consumption-reducing system
Through the chloromethane vaporization refrigeration and energy-saving and consumption reduction system, low-temperature frozen water or circulating water replaces steam for chloromethane vaporization, the problem of high steam consumption is solved, and the comprehensive utilization of energy and cost reduction is achieved.
Patent Information
- Application Number
- CN202421861261.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The steam consumption in the existing chloromethane vaporization device is high, resulting in increased energy consumption and cost, and the frozen water preparation process requires additional energy consumption.
The chloromethane vaporization refrigeration energy-saving and consumption reduction system is adopted, and the chloromethane vaporizer is connected with frozen water or circulating water. The chloromethane vaporization is used instead of steam to vaporize chloromethane, and the steaming of steam is cancelled, and the frozen water after chloromethane vaporization is used as a low-temperature cooling source.
It reduces steam consumption and freezer energy consumption, realizes comprehensive cascade utilization of energy, and reduces plant energy consumption and cost.
Smart Images
Figure CN223064119U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an energy-saving and consumption-reducing system, specifically to a chloroform vaporization refrigeration energy-saving and consumption-reducing system. Background Art
[0002] Chloroform, also known as methyl chloride, is an organic compound. It is a colorless gas under normal temperature and pressure, slightly soluble in water, soluble in ethanol, chloroform, benzene, carbon tetrachloride, glacial acetic acid, etc. It is mainly used as a raw material for organosilicon, and also as a solvent, refrigerant, spice, etc.
[0003] In the synthesis reaction of organosilicon monomers, gaseous chloroform reacts with elemental silicon in a fluidized bed at about 300°C to produce methylchlorosilane products.
[0004] Gaseous chloroform comes from a chloroform synthesis unit. Chloroform and water are synthesized from methanol and hydrogen chloride. After purification, it is compressed to about 0.9 MPa, liquefied and then enters a chloroform storage tank. Then, steam is used to vaporize the liquid chloroform into gaseous chloroform, which enters the organosilicon monomer synthesis unit.
[0005] In the existing chloroform vaporization device, steam is generally used to vaporize chloroform. The process is as follows: Liquid chloroform is transported to a chloroform vaporizer by a chloroform transfer pump. After being vaporized by steam heating, it forms gaseous chloroform, which is transported through a pipeline to the organochlorosilane unit for monomer synthesis. A large amount of steam is required for the chloroform vaporization process. About 250 kg of steam is consumed per ton of chloroform. The energy consumption and cost required by this method are relatively high.
[0006] Chilled water, also known as solid water, refers to the solidified state of water under low temperature conditions, and its temperature is below the freezing point (0°C). Chilled water has a wide range of applications and can be used in industries such as industry, medical treatment, and food. In order to obtain low-temperature chilled water, a refrigerator is generally used for preparation. The preparation process is as follows: The refrigerator uses fluorocarbon organic compounds as refrigerants. Under pressurized conditions, the fluorocarbon organic refrigerant is liquefied by cooling with circulating water. Under low pressure, the fluorocarbon organic refrigerant is vaporized by the temperature rise of low-temperature chilled water to achieve the purpose of preparing low-temperature chilled water in the factory area. The use of the refrigerator in this process also requires a certain amount of energy consumption. Content of the Utility Model
[0007] Aiming at the problems existing in the prior art, the utility model provides a chloroform vaporization refrigeration energy-saving and consumption-reducing system. The utility model eliminates the steam consumption for vaporizing chloroform. The vaporization of chloroform can be used to prepare low-temperature chilled water, reducing the energy consumption of the refrigerator for preparing low-temperature water in the factory area. It is an energy-saving and emission-reduction scheme for the comprehensive cascade utilization of energy in the factory area.
[0008] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model is as follows:
[0009] A chloroform vaporization refrigeration energy-saving and consumption-reducing system, the system includes a chloroform vaporizer and a chloroform compressor that are connected to each other. The lower part of the chloroform vaporizer is connected to the return water pipeline of chilled water or the supply water pipeline of circulating water, and the upper part of the chloroform vaporizer is connected to the supply water pipeline of chilled water or the return water pipeline of circulating water; the bottom of the chloroform vaporizer is connected to the chloroform liquid delivery pipeline, and the chloroform compressor is connected to the chloroform usage unit through a delivery pipeline.
[0010] Preferably, a pre-chloroform buffer tank is provided between the chloroform vaporizer and the chloroform compressor.
[0011] Preferably, the top of the chloroform vaporizer is connected to the lower part of the pre-chloroform buffer tank, the bottom of the pre-chloroform buffer tank is connected to the lower part of the chloroform vaporizer, and the top of the pre-chloroform buffer tank is connected to the chloroform compressor.
[0012] Preferably, a post-chloroform buffer tank is also provided between the chloroform compressor and the chloroform usage unit.
[0013] Preferably, the chloroform compressor is connected to the lower part of the post-chloroform buffer tank, and the top of the post-chloroform buffer tank is connected to the chloroform usage unit.
[0014] Preferably, the supply water pipeline of chilled water is connected to the unit using cold. The vaporization of liquid chloroform cools down the chilled water at low temperature, and the chilled water at low temperature after cooling is transported to the unit using cold to provide low-temperature cooling capacity to the unit using cold; the utility model can be used to prepare chilled water at low temperature through the vaporization of chloroform, reducing the energy consumption of the chiller for preparing low-temperature water in the plant area.
[0015] Preferably, the return water pipeline of circulating water is connected to the circulating water station.
[0016] Preferably, liquid chloroform is transported to the chloroform vaporizer through a chloroform delivery pump.
[0017] Liquid chloroform is transported to a low-pressure chloroform vaporizer through a chloroform delivery pump. Low-temperature chilled water or circulating water is used to replace steam as the heat source for vaporizing liquid chloroform. After being heated by low-temperature chilled water or circulating water, liquid chloroform vaporizes to form gaseous chloroform, which is compressed by a compressor and then transported to the chloroform usage unit through a pipeline.
[0018] The utility model can replace the chiller, use the vaporization of liquid chloroform to cool down the chilled water at low temperature, and provide low-temperature cooling capacity to the cold-using units in the factory; while providing cooling capacity, the heat source used for vaporizing chloroform with steam in the original device is cancelled, reducing the use of high-temperature heat sources in the factory.
[0019] Or use circulating water to vaporize liquid chloromethane, canceling the heat source used for vaporizing chloromethane in the original device and reducing the use of high-temperature heat sources in the factory.
[0020] The process of vaporizing with low-temperature chilled water is as follows: Use low-temperature chilled water at -10°C to enter the shell side of the vaporizer, and chloromethane flows through the tube side. When chloromethane vaporizes, it absorbs heat, cooling the -10°C low-temperature chilled water to -15°C. A buffer tank is added to the vaporizer, and the gas phase goes to compression. The liquid phase below the buffer tank returns to the vaporizer. After the gas phase is compressed by the compressor, the temperature of the gas phase rises and is transported through the pipeline to the chloromethane usage unit.
[0021] The process of vaporizing with circulating water is as follows: Use circulating water to enter the shell side of the vaporizer, and chloromethane flows through the tube side. When chloromethane vaporizes, it absorbs heat, cooling the 33°C circulating water to 27°C. A buffer tank is added to the vaporizer, and the gas phase goes to compression. The liquid phase below the buffer tank returns to the vaporizer. After the gas phase is compressed by the compressor, the temperature of the gas phase rises and is transported through the pipeline to the chloromethane usage unit.
[0022] The beneficial effects of the present utility model are as follows:
[0023] The present utility model adopts a chloromethane vaporizer. The lower part of the chloromethane vaporizer is connected to the chilled water return pipeline or the circulating water supply pipeline, and the upper part of the chloromethane vaporizer is connected to the chilled water supply pipeline or the circulating water return pipeline. While vaporizing chloromethane, it utilizes the characteristics of low-pressure and low-temperature vaporization of chloromethane. Chloromethane is vaporized by replacing steam with low-temperature chilled water or circulating water, canceling the use of steam for chloromethane; and the chilled water after vaporizing liquid chloromethane can be used as the cold source of low-temperature chilled water, achieving the purpose of energy conservation and consumption reduction. Description of the Drawings
[0024] Figure 1 It is a schematic structural diagram of the chloromethane vaporization refrigeration energy conservation and consumption reduction system in Embodiment 1;
[0025] Figure 2 It is a schematic flow diagram of vaporizing chloromethane with low-temperature chilled water;
[0026] Figure 3 It is a schematic structural diagram of the chloromethane vaporization refrigeration energy conservation and consumption reduction system in Embodiment 2;
[0027] Figure 4 It is a schematic flow diagram of vaporizing chloromethane with circulating water. Detailed Embodiments
[0028] The following are specific descriptions of the technical solutions of the present utility model through embodiments. These embodiments are for the purpose of explaining the present utility model and not for limiting it. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.
[0029] Embodiment 1
[0030] Low-temperature frozen water vaporizes methyl chloride
[0031] Refer to Figure 1 , Figure 2 , a methyl chloride vaporization refrigeration energy-saving and consumption-reducing system, the system includes a methyl chloride vaporizer 1 and a methyl chloride compressor 2 that are connected to each other. The lower part of the methyl chloride vaporizer 1 is connected to the chilled water return pipe 3, and the upper part of the methyl chloride vaporizer 1 is connected to the chilled water supply pipe 4; the bottom of the methyl chloride vaporizer 1 is connected to the methyl chloride liquid delivery pipe 5, and liquid methyl chloride is transported to the methyl chloride vaporizer through a methyl chloride delivery pump; the methyl chloride compressor 2 is connected to a methyl chloride usage unit 6 through a delivery pipe.
[0032] A methyl chloride pre-buffer tank 7 is provided between the methyl chloride vaporizer 1 and the methyl chloride compressor 2. The top of the methyl chloride vaporizer 1 is connected to the lower part of the methyl chloride pre-buffer tank 7, the bottom of the methyl chloride pre-buffer tank 7 is connected to the lower part of the methyl chloride vaporizer 1, and the top of the methyl chloride pre-buffer tank 7 is connected to the methyl chloride compressor 2.
[0033] A methyl chloride post-buffer tank 8 is further provided between the methyl chloride compressor 2 and the methyl chloride usage unit 6. The methyl chloride compressor 2 is connected to the lower part of the methyl chloride post-buffer tank 8, and the top of the methyl chloride post-buffer tank 8 is connected to the methyl chloride usage unit 6.
[0034] The chilled water supply pipe 4 is connected to a cold-using unit. The vaporization of liquid methyl chloride cools the low-temperature chilled water, and the cooled low-temperature chilled water is transported to the cold-using unit to provide low-temperature cooling capacity for the cold-using unit; the present utility model can be used to prepare low-temperature chilled water through the vaporization of methyl chloride, reducing the energy consumption of the low-temperature water preparation refrigerators in the factory area.
[0035] Liquid methyl chloride is transported to a low-pressure methyl chloride vaporizer through a methyl chloride delivery pump. After being heated by low-temperature chilled water, it vaporizes to form gaseous methyl chloride (-18 °C), which is compressed by a compressor and transported to the methyl chloride usage unit through a pipe, specifically for monomer synthesis in an organochlorosilane synthesis unit.
[0036] The vaporization temperature of methyl chloride is -18°C at 30 kPa (G). Chilled water at -10°C enters the tube side of the vaporizer, and methyl chloride flows through the shell side. When methyl chloride vaporizes, it absorbs heat, cooling the -10°C chilled water to -15°C. A vaporization buffer tank is added to the vaporizer, and the gas phase goes to compression. The liquid phase below the buffer tank returns to the vaporizer.
[0037] The gas phase is compressed to 0.7 MPa (G) by the compressor, and the gas phase temperature rises to 125°C, and is transported to the methyl chlorosilane synthesis unit through the pipeline.
[0038] The utility model combines the technologies of methyl chloride vaporization and chilled water preparation, comprehensively utilizes the energy cascade, and achieves the purpose of energy conservation and consumption reduction.
[0039] The energy consumption comparison results are shown in Table 1 (calculated based on vaporizing 1 ton of liquid methyl chloride to prepare chilled water at -15°C):
[0040] Table 1
[0041]
[0042] Energy consumption saved per ton of methyl chloride: 78.4 - 17.4 = 61 yuan
[0043] For a typical silicone monomer synthesis enterprise with an annual output of 300,000 tons, the amount of methyl chloride used is 30 * 0.8 = 240,000 tons
[0044] Annual income: 24 * 61 = 14.64 million yuan
[0045] Example 2
[0046] Circulating water vaporizes methyl chloride
[0047] Refer to Figure 3 , Figure 4 , a methyl chloride vaporization refrigeration energy-saving and consumption-reducing system, the system includes a methyl chloride vaporizer 1 and a methyl chloride compressor 2 that are connected to each other. The lower part of the methyl chloride vaporizer 1 is connected to the circulating water supply pipeline 9, and the upper part of the methyl chloride vaporizer 1 is connected to the circulating water return pipeline 10; the bottom of the methyl chloride vaporizer 1 is connected to the methyl chloride liquid delivery pipeline 5, and liquid methyl chloride is transported to the methyl chloride vaporizer through the methyl chloride delivery pump; the methyl chloride compressor 2 is connected to the methyl chloride usage unit 6 through the delivery pipeline.
[0048] A methyl chloride pre-buffer tank 7 is provided between the methyl chloride vaporizer 1 and the methyl chloride compressor 2. The top of the methyl chloride vaporizer 1 is connected to the lower part of the methyl chloride pre-buffer tank 7, the bottom of the methyl chloride pre-buffer tank 7 is connected to the lower part of the methyl chloride vaporizer 1, and the top of the methyl chloride pre-buffer tank 7 is connected to the methyl chloride compressor 2.
[0049] A post-buffer tank 8 for methyl chloride is further provided between the methyl chloride compressor 2 and the methyl chloride using unit 6. The lower part of the methyl chloride compressor 2 is connected to the post-buffer tank 8 for methyl chloride in a communicating manner, and the top of the post-buffer tank 8 for methyl chloride is connected to the methyl chloride using unit 6 in a communicating manner. The return water pipeline 10 of the circulating water is connected to the circulating water station.
[0050] Liquid methyl chloride is transported to a low-pressure methyl chloride vaporizer through a methyl chloride delivery pump. After being heated by circulating water, it vaporizes to form gaseous methyl chloride (20 °C), which is compressed by a compressor and transported through a pipeline to an organochlorosilane synthesis unit for monomer synthesis.
[0051] When methyl chloride is at 0.5 Mpa (G), its vaporization temperature is 20 °C. Circulating water enters the tube side of the vaporizer, and methyl chloride flows through the shell side. When methyl chloride vaporizes, it absorbs heat, cooling the 33-degree circulating water to 27 °C. A vaporization buffer tank is added to the vaporizer, and the gas phase goes for compression, while the liquid phase below the buffer tank returns to the vaporizer.
[0052] The gas phase is compressed to 0.7 MPa by the compressor, and the gas phase temperature rises to 125 °C, which is then transported through a pipeline to the methyl chlorosilane synthesis unit.
[0053] The present utility model uses circulating water to vaporize liquid methyl chloride, eliminating the heat source used for vaporizing methyl chloride in the original device, and reducing the use of high-temperature heat sources in the factory.
[0054] The present utility model combines the vaporization of methyl chloride and uses low-energy circulating water as the heating and vaporization medium to achieve the purpose of energy conservation and consumption reduction.
[0055] The comparison results of the energy consumption of the scheme are shown in Table 2 (calculated based on vaporizing 1 ton of liquid methyl chloride using circulating water):
[0056] Table 2
[0057]
[0058] Energy consumption saved per ton of methyl chloride: 50 - 7.4 = 42.6 yuan
[0059] For a typical organosilicon monomer synthesis enterprise with an annual output of 300,000 tons, the amount of methyl chloride used is 30 * 0.8 = 240,000 tons
[0060] Annual revenue: 24 * 42.6 = 10.224 million yuan.
[0061] The quality of the chilled water as the heat source for vaporization in the present utility model can also use various water sources between -25 °C and +40 °C.
[0062] The utility model connects the lower part of a chloromethane vaporizer with a chilled water return pipe or a circulating water supply pipe, connects the upper part of the chloromethane vaporizer with a chilled water supply pipe or a circulating water return pipe, uses low-temperature chilled water or circulating water to vaporize chloromethane, and then compresses the gaseous chloromethane to a use pressure and transmits it to a user unit, utilizes the vaporization of chloromethane to recover cold energy, eliminates the use of steam, and achieves the purpose of energy saving and consumption reduction.
[0063] Finally, it should be noted that the above are only some specific embodiments of the utility model. Obviously, the utility model is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by ordinary technicians in this field should be considered as the protection scope of the utility model.
Claims
1. A chloroform vaporization refrigeration energy-saving and consumption-reducing system, characterized in that: The system includes a methyl chloride vaporizer and a methyl chloride compressor that are interconnected. The lower part of the methyl chloride vaporizer is connected to the return water pipeline of chilled water or the supply water pipeline of circulating water, and the upper part of the methyl chloride vaporizer is connected to the supply water pipeline of chilled water or the return water pipeline of circulating water; the bottom of the methyl chloride vaporizer is connected to the methyl chloride liquid delivery pipeline, and the methyl chloride compressor is connected to the methyl chloride using unit through a delivery pipeline.
2. The chloroform vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, wherein: A methyl chloride pre-buffer tank is provided between the methyl chloride vaporizer and the methyl chloride compressor.
3. The methyl chloride vaporization refrigeration energy-saving and consumption-reducing system according to claim 2, characterized in that: The top of the methyl chloride vaporizer is connected to the lower part of the methyl chloride pre-buffer tank, the bottom of the methyl chloride pre-buffer tank is connected to the lower part of the methyl chloride vaporizer, and the top of the methyl chloride pre-buffer tank is connected to the methyl chloride compressor.
4. The methyl chloride vaporization refrigeration energy-saving and consumption-reducing system according to claim 2, wherein: A methyl chloride post-buffer tank is also provided between the methyl chloride compressor and the methyl chloride using unit.
5. The methyl chloride vaporization refrigeration energy-saving and consumption-reducing system according to claim 4, characterized in that: The methyl chloride compressor is connected to the lower part of the methyl chloride post-buffer tank, and the top of the methyl chloride post-buffer tank is connected to the methyl chloride using unit.
6. The chloroform vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, wherein: The supply water pipeline of chilled water is connected to the user of chilled water.
7. The chloroform vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, characterized in that: The return water pipeline of circulating water is connected to the circulating water station.
8. The chloroform vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, characterized in that: Liquid methyl chloride is transported to the methyl chloride vaporizer through a methyl chloride delivery pump.