Liquid chlorine vaporization refrigeration energy-saving and consumption-reducing system
By using chlorine vaporizer and low-temperature frozen water or circulating water to replace steam heat sources in the liquid chlorine vaporization process, the high energy consumption and safety risks in the liquid chlorine vaporization process are solved, and the energy-saving and consumption-reducing effect of liquid chlorine vaporization is achieved.
Patent Information
- Application Number
- CN202421861265.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-08-02
AI Technical Summary
The existing liquid chlorine vaporization process has problems such as high steam consumption, high safety risks and high energy consumption costs. Steam entering the chlorine pipeline can easily lead to corrosion and explosion risks.
The chlorine vaporizer is used to replace steam with low-temperature frozen water or circulating water as a heat source, and the low-pressure and low-temperature characteristics of chlorine are used for vaporization, and the use of steam is cancelled. Combined with the coil-type vaporizer to prevent chlorine enrichment, achieving safe and efficient vaporization of liquid chlorine.
The comprehensive energy utilization of the liquid chlorine vaporization process is realized, which reduces the energy consumption of the low-temperature water preparation and refrigeration machine, reduces the use of high-temperature heat sources in the factory, and improves safety and economic benefits.
Smart Images
Figure CN223165389U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an energy-saving and consumption-reducing system, specifically to a chlorine vaporization refrigeration energy-saving and consumption-reducing system. Background Technique
[0002] Liquid chlorine is a basic chemical raw material, which can be used in industries such as metallurgy, textile, and paper-making, and is a raw material for preparing phosphorus trichloride, phosphorus oxychloride, synthetic hydrochloric acid, polyvinyl chloride, plastics, and pesticides.
[0003] Liquid chlorine is a low-pressure liquefied gas. Almost all the chlorine gas used in factories is stored and transported in liquid form. Specifically, when it comes to production units, it generally must be vaporized before use. The liquid chlorine vaporization process in China generally adopts the following methods:
[0004] 1. The liquid chlorine pipeline is externally jacketed and heated with steam or hot water. Generally speaking, the steam pressure in the jacket is above 0.5 Mpa, which is higher than the chlorine gas pressure in the chlorine pipeline. Once the chlorine pipeline leaks, steam and water will enter the chlorine pipeline, resulting in corrosion of the pipeline and equipment (chlorine gas is corrosive and has a corrosive effect on almost all metals). If steam and water enter the reaction kettle, it will also cause serious production accidents such as explosion.
[0005] 2. The liquid chlorine row pipe is heated with steam in a hot water tank. This method is not only difficult to control the temperature, but also consumes a large amount of energy such as steam, and has an adverse impact on the production site environment.
[0006] 3. Liquid chlorine is transported to the liquid chlorine vaporizer by a liquid chlorine transfer pump. After being vaporized by steam heating, it forms gaseous chlorine, which is transported to the chlorine-using unit through a pipeline. The chlorine vaporization process requires hot water at ≥71°C. The hot water is recycled to steam, and about 100 kg of steam is consumed for each ton of chlorine vaporization. The energy consumption and cost required by this method are also relatively high.
[0007] 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 is widely used and can be used in industries such as industry, medical treatment, and food. In order to obtain low-temperature chilled water, a chiller is generally required for preparation. The preparation process is as follows: The chiller 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 heating with low-temperature chilled water to achieve the purpose of preparing low-temperature chilled water in the factory area. The use of the chiller in this process also requires a certain amount of energy consumption. Content of the Utility Model
[0008] In view of the problems existing in the prior art, the present utility model provides a chlorine vaporization refrigeration energy-saving and consumption-reducing system. The present utility model eliminates the steam consumption for vaporizing chlorine gas. Through the vaporization of chlorine gas, low-temperature chilled water can be prepared, reducing the energy consumption of the chiller for preparing low-temperature water in the plant area. It is an energy-saving and emission-reduction solution for the comprehensive cascade utilization of energy in the plant area.
[0009] To achieve the above-mentioned utility model purpose, the technical solution adopted by the present utility model is as follows:
[0010] A chlorine vaporization refrigeration energy-saving and consumption-reducing system, the system includes a chlorine vaporizer, the bottom of the chlorine vaporizer is connected to the chilled water return pipeline or the circulating water supply pipeline, and the top of the chlorine vaporizer is connected to the chilled water supply pipeline or the circulating water return pipeline; the lower part of the chlorine vaporizer is connected to the liquid chlorine delivery pipeline, and the upper part of the chlorine vaporizer is connected to the chlorine gas delivery pipeline.
[0011] Preferably, the chilled water supply pipeline is connected to the cold-using unit. The vaporization of liquid chlorine 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 to the cold-using unit; through the vaporization of chlorine gas, the present utility model can be used to prepare low-temperature chilled water, reducing the energy consumption of the chiller for preparing low-temperature water in the plant area.
[0012] Preferably, the chlorine gas delivery pipeline is connected to the chlorine-using unit.
[0013] Preferably, the chlorine vaporizer is a coil-type vaporizer. During the vaporization process, the chlorine gas uses the coil for vaporization to prevent the enrichment of NCl3 and avoid safety risks.
[0014] Preferably, the circulating water return pipeline is connected to the circulating water station. It is convenient for the recycling of circulating water and helps to reduce energy consumption.
[0015] Preferably, the liquid chlorine is transported to the chlorine vaporizer through a chlorine delivery pump.
[0016] The liquid chlorine is transported to the low-pressure liquid chlorine vaporizer through a liquid chlorine delivery pump. Low-temperature chilled water or circulating water is used to replace steam as the heat source for vaporizing liquid chlorine. After being heated by the low-temperature chilled water or circulating water, the liquid chlorine vaporizes to form gaseous chlorine, and the vaporized chlorine is directly transported to the chlorine-using unit through a pipeline.
[0017] The present utility model can replace the chiller and use the vaporization of liquid chlorine to cool the low-temperature chilled water and provide low-temperature cooling capacity to the cold-using units in the factory; while providing the cooling capacity, the heat source used for vaporizing liquid chlorine with steam in the original device is cancelled, reducing the use of high-temperature heat sources in the factory.
[0018] Vaporize liquid chlorine using circulating water, eliminating the heat source used for vaporizing liquid chlorine in the original device with steam, and reducing the use of high-temperature heat sources in the factory.
[0019] The process of vaporizing with low-temperature chilled water is as follows: -10°C low-temperature chilled water enters the shell side of the vaporizer, and chlorine gas flows through the tube side. When the chlorine gas vaporizes, it absorbs heat, cooling the -10°C low-temperature chilled water to -15°C.
[0020] The process of vaporizing with circulating water is as follows: Circulating water enters the shell side of the vaporizer, and chlorine gas flows through the tube side. When the chlorine gas vaporizes, it absorbs heat, cooling the 33°C circulating water to 27°C.
[0021] The beneficial effects of the present utility model are as follows:
[0022] The present utility model adopts a chlorine gas vaporizer. The lower part of the chlorine gas vaporizer is connected to the chilled water return pipeline or the circulating water supply pipeline, and the upper part of the chlorine gas vaporizer is connected to the chilled water supply pipeline or the circulating water return pipeline. While vaporizing liquid chlorine, it utilizes the characteristics of low-pressure and low-temperature vaporization of chlorine gas. The liquid chlorine is vaporized by replacing steam with low-temperature chilled water or circulating water, eliminating the use of steam; and the chilled water supply can be used as the cold source of the low-temperature chilled water and sent to the cold-using unit for use, achieving the purpose of energy conservation and consumption reduction. Description of the Drawings
[0023] Figure 1 It is a schematic structural diagram of the liquid chlorine vaporization refrigeration energy conservation and consumption reduction system of Embodiment 1;
[0024] Figure 2 It is a schematic flow diagram of vaporizing chlorine gas with low-temperature chilled water;
[0025] Figure 3 It is a schematic structural diagram of the liquid chlorine vaporization refrigeration energy conservation and consumption reduction system of Embodiment 2;
[0026] Figure 4 It is a schematic flow diagram of vaporizing chlorine gas with circulating water. Detailed Embodiments
[0027] The following are specific descriptions of the technical solutions of the present utility model through embodiments. These embodiments are for the purpose of illustration of the present utility model and not for limitation. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.
[0028] Embodiment 1
[0029] Vaporize chlorine gas with low-temperature chilled water
[0030] Refer to Figure 1 , Figure 2, A liquid chlorine vaporization refrigeration energy-saving and consumption-reducing system. The system includes a chlorine vaporizer 1. The bottom of the chlorine vaporizer 1 is connected to the return water pipe 2 of the chilled water, and the top of the chlorine vaporizer 1 is connected to the supply water pipe 3 of the chilled water. The lower part of the chlorine vaporizer 1 is connected to the liquid chlorine delivery pipe 4, and the upper part of the chlorine vaporizer 1 is connected to the gaseous chlorine delivery pipe 5. The gaseous chlorine delivery pipe 5 is connected to the chlorine-using unit.
[0031] The supply water pipe 3 of the chilled water is connected to the cold-using unit. The vaporization of liquid chlorine cools down 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 utility model can be used to prepare low-temperature chilled water through chlorine vaporization, reducing the energy consumption of the low-temperature water preparation chiller in the plant area.
[0032] The chlorine vaporizer is a coil-type vaporizer. In the vaporization process, chlorine uses the coil for vaporization to prevent the enrichment of NCl3 and avoid safety risks. Liquid chlorine is transported to the chlorine vaporizer through a chlorine delivery pump.
[0033] Liquid chlorine at 25°C is transported to a low-pressure liquid chlorine vaporizer through a liquid chlorine delivery pump. After being heated by low-temperature chilled water, it vaporizes to form gaseous chlorine (-18°C), and the vaporized chlorine is directly transported to the chlorine-using unit through a pipeline.
[0034] Specifically, when chlorine vaporizes at 0.1 MPa (G), the vaporization temperature is -18°C. Low-temperature chilled water at -10°C enters the shell side of the vaporizer, and chlorine passes through the tube side. When chlorine vaporizes, it absorbs heat, cooling the -10°C low-temperature chilled water to -15°C. The vaporized chlorine is directly transported to the chlorine-using unit (0.1 MPa) through a pipeline. The utility model can replace the chiller, use the vaporization of liquid chlorine to cool down the low-temperature chilled water, and provide low-temperature cooling capacity for the cold-using unit in the factory. While providing cooling capacity, the heat source used for vaporizing liquid chlorine with steam in the original device is cancelled, reducing the use of high-temperature heat sources in the factory.
[0035] In the vaporization process, chlorine uses the coil for vaporization to prevent the enrichment of NCl3 and there is no explosion safety risk due to the enrichment of NCl3.
[0036] The utility model combines liquid chlorine vaporization and chilled water preparation technologies, comprehensively utilizes energy cascading, and achieves the purpose of energy conservation and consumption reduction.
[0037] The energy consumption comparison results are shown in Table 1 (calculated based on vaporizing 1 ton of liquid chlorine to prepare -15°C low-temperature chilled water):
[0038] Table 1
[0039]
[0040] Calculated based on an annual chlorine usage of 100,000 tons:
[0041] The technical solution of the utility model generates annual revenue from chlorine gasification: 100,000 * 32.8 yuan = 3.28 million yuan.
[0042] Embodiment 2
[0043] Circulating water vaporizes chlorine gas
[0044] Refer to Figure 4 and refer to Figure 1 , Figure 2 , A liquid chlorine gasification refrigeration energy-saving and consumption-reducing system, the system includes a chlorine gasifier 1, the bottom of the chlorine gasifier 1 is connected to a circulating water supply pipeline 6, and the top of the chlorine gasifier 1 is connected to a circulating water return pipeline 7; the lower part of the chlorine gasifier 1 is connected to a liquid chlorine delivery pipeline 4, the upper part of the chlorine gasifier 1 is connected to a chlorine gas delivery pipeline 5, and the chlorine gas delivery pipeline 5 is connected to a chlorine-using unit.
[0045] The chlorine gasifier is a coil-type gasifier. During the gasification process, the chlorine gas uses the coil for gasification to prevent the enrichment of NCl3 and avoid safety risks. Liquid chlorine is transported to the chlorine gasifier by a chlorine delivery pump.
[0046] The circulating water return pipeline 7 is connected to a circulating water station. Facilitating the recycling of circulating water is beneficial to reducing energy consumption.
[0047] Liquid chlorine at 25 °C is transported to a low-pressure liquid chlorine gasifier by a liquid chlorine delivery pump. After being heated by circulating water, it is gasified to form gaseous chlorine (20 °C), and the gasified chlorine is directly transported to the chlorine-using unit through a pipeline.
[0048] Specifically, when the chlorine gas is at 0.6 MPa (G), its gasification temperature is 21 °C. The circulating water enters the shell side of the gasifier, and the chlorine gas passes through the tube side. When the chlorine gas is gasified, it absorbs heat, cooling the 33 °C circulating water to 27 °C, and the gasified chlorine is directly transported to the chlorine-using unit (0.6 MPa) through a pipeline.
[0049] The utility model uses circulating water to gasify liquid chlorine, eliminating the heat source used for gasifying liquid chlorine in the original device with steam, and reducing the use of high-temperature heat sources in the factory.
[0050] During the gasification process, the chlorine gas uses the coil for gasification to prevent the enrichment of NCl3 and avoid safety risks.
[0051] The utility model combines liquid chlorine gasification and uses lower-energy circulating water as the heating and gasification medium to achieve the purpose of energy conservation and consumption reduction.
[0052] The energy consumption comparison results are shown in Table 2 (calculated based on gasifying 1 ton of liquid chlorine with circulating water):
[0053] Table 2
[0054]
[0055] Calculated based on annual consumption of 100,000 tons of chlorine:
[0056] The annual revenue generated by chlorine gasification is: 100,000*(20-1.1)yuan=1.89 million yuan.
[0057] The quality of the chilled water used as the vaporization heat source of the utility model can also be used with various water sources between -25°C and +40°C.
[0058] The utility model connects the lower part of a chlorine vaporizer with a chilled water return pipe or a circulating water supply pipe, connects the upper part of the chlorine vaporizer with a chilled water supply pipe or a circulating water return pipe, uses low-temperature chilled water or circulating water for vaporization, and then directly transports the gaseous chlorine to a user unit, utilizes the vaporization of liquid chlorine to recover cooling energy, eliminates steam consumption, and achieves the purpose of energy saving and consumption reduction.
[0059] Finally, it should be noted that the above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples and is subject to numerous variations. All variations that can be directly derived or conceived by a person of ordinary skill in the art from the disclosure of this invention should be considered within the scope of protection of this invention.
Claims
1. A liquid chlorine vaporization refrigeration energy-saving and consumption-reducing system, characterized in that: The system includes a chlorine vaporizer. The bottom of the chlorine vaporizer is connected to the return pipe of chilled water or the supply pipe of circulating water, and the top of the chlorine vaporizer is connected to the supply pipe of chilled water or the return pipe of circulating water. The lower part of the chlorine vaporizer is connected to a chlorine liquid conveying pipe, and the upper part of the chlorine vaporizer is connected to a chlorine gas conveying pipe.
2. The chlorine vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, wherein: The supply pipe of chilled water is connected to a user of chilled water.
3. The chlorine vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, characterized in that: The chlorine gas conveying pipe is connected to a user of chlorine.
4. The chlorine vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, wherein: The chlorine vaporizer is a coil-type vaporizer.
5. The chlorine vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, characterized in that: The return pipe of circulating water is connected to a circulating water station.
6. The chlorine vaporization refrigeration energy-saving and consumption-reducing system according to claim 1, characterized in that: Liquid chlorine is transported to the chlorine vaporizer through a chlorine delivery pump.