Compressed gas heat exchange device

Abstract

The utility model discloses a compressed gas heat exchange device. The first input end of the gas-gas heat exchanger is connected with the output end of a gas compressor; the input end of the water cooler is connected with the first output end of the gas-gas heat exchanger, and when it is judged that the temperature of the compressed gas cooled for the first time is higher than a preset threshold value, the cooled compressed gas is cooled again; the input end of the filter group is connected with the output end of the water cooler; or the input end of the filter set is connected with the first output end of the gas-gas heat exchanger, and when it is judged that the temperature of the compressed gas cooled for the first time is lower than or equal to the preset threshold value, the cooled compressed gas is purified; the output end of the filter group is connected with the second input end of the gas-gas heat exchanger; and the second output end of the gas-gas heat exchanger is connected with the input end of the rear gas system. According to the device, compressed gas can be cooled, purified, heated and supplied to a rear gas system, hot compressed gas output by the gas compressor is fully utilized for heat exchange, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas heat exchange, and in particular to a compressed gas heat exchange device. Background Art

[0002] The gas temperature at the outlet of a typical gas compressor can reach around 90°C. It is typically cooled to approximately 20°C above ambient temperature via a water or air cooler before being supplied to the downstream gas system. However, in some processes, the purified compressed gas often needs to be reheated to a specified temperature before use. Existing technologies achieve this by installing filters and heaters, but this fails to fully utilize the gas temperature at the compressor outlet, resulting in costly heating.

[0003] The existing technology meets the requirements of compressed gas purification and reheating by setting filters and heaters, but it cannot fully utilize the gas temperature at the gas compressor outlet for heating, resulting in cost waste. No effective solution has been proposed yet. Utility Model Content

[0004] A compressed gas heat exchange device is provided in an embodiment of the present invention to solve the problem that in the prior art, the requirements of compressed gas purification and reheating are met by setting filters and heaters, but the gas temperature at the outlet of the gas compressor cannot be fully utilized for heating, resulting in cost waste.

[0005] To achieve the above-mentioned objectives, the present invention provides a compressed gas heat exchange device, which includes: a gas compressor for outputting compressed gas; an air-to-air heat exchanger, wherein a first input end of the air-to-air heat exchanger is connected to an output end of the gas compressor, and is used to cool the output compressed gas for a first time; a water cooler, wherein an input end of the water cooler is connected to the first output end of the air-to-air heat exchanger, and when it is determined that the temperature of the compressed gas after the first cooling is higher than a preset threshold, the cooled compressed gas is cooled again; a filter group, wherein an input end of the filter group is connected to the output end of the water cooler, and is used to purify the cooled compressed gas; or an input end of the filter group is connected to the first output end of the air-to-air heat exchanger, and when it is determined that the temperature of the compressed gas after the first cooling is lower than or equal to a preset threshold, the cooled compressed gas is purified; the output end of the filter group is connected to a second input end of the air-to-air heat exchanger, and is used to heat the purified cooled compressed gas; and the second output end of the air-to-air heat exchanger is connected to an input end of a rear gas system, and is used to input the purified heated compressed gas into the rear gas system.

[0006] Optionally, it also includes: a temperature measuring instrument; two temperature measuring instruments are provided, one of which is connected to the first output end of the gas-to-gas heat exchanger for detecting the temperature of the compressed gas after the first cooling; the other is connected to the second output end of the gas-to-gas heat exchanger for detecting the temperature of the purified heated compressed gas.

[0007] Optionally, the filter group includes multiple filter elements.

[0008] Optionally, the air-to-air heat exchanger is a plate-type air-to-air heat exchanger, a tubular air-to-air heat exchanger, or a rotary air-to-air heat exchanger.

[0009] Optionally, the water cooler is a surface condenser.

[0010] Optionally, the water cooler is a shell and tube water cooler.

[0011] Beneficial effects of the utility model:

[0012] The utility model provides a compressed gas heat exchange device, which includes: a gas compressor for outputting compressed gas; an air-to-air heat exchanger, wherein a first input end of the air-to-air heat exchanger is connected to an output end of the gas compressor, and is used to cool the output compressed gas for a first time; a water cooler, wherein an input end of the water cooler is connected to the first output end of the air-to-air heat exchanger, and when it is determined that the temperature of the compressed gas after the first cooling is higher than a preset threshold value, the cooled compressed gas is cooled again; a filter group, wherein an input end of the filter group is connected to the output end of the water cooler, and is used to purify the cooled compressed gas; or an input end of the filter group is connected to the first output end of the air-to-air heat exchanger, and when it is determined that the temperature of the compressed gas after the first cooling is lower than or equal to the preset threshold value, the cooled compressed gas is purified; the output end of the filter group is connected to a second input end of the air-to-air heat exchanger, and is used to heat the purified cooled compressed gas; the second output end of the air-to-air heat exchanger is connected to an input end of a rear gas system, and is used to input the purified heated compressed gas into the rear gas system. The device can purify the cooled compressed gas and then reheat it to supply it to the rear gas system, and fully utilize the hot compressed gas output by the gas compressor for heat exchange, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a compressed gas heat exchange device with a water cooler provided by an embodiment of the present utility model;

[0014] Figure 2 It is a structural schematic diagram of a compressed gas heat exchange device without a water cooler provided by an embodiment of the present utility model.

[0015] Explanation of symbols:

[0016] Gas compressor-1, air-to-air heat exchanger-2, water cooler-3, filter group-4, rear gas system-5. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0018] The gas temperature at the outlet of the gas compressor 1 can typically reach around 90°C. It is typically cooled to approximately ambient temperature + 20°C by a rear water cooler 3 or air cooler before being supplied to the rear gas system 5. However, in some processes, the purified compressed gas often needs to be reheated to a specified temperature before use. The existing technology achieves this by installing filters and heaters, but this fails to fully utilize the gas temperature at the outlet of the gas compressor 1 for heating, resulting in costly waste.

[0019] Therefore, the present invention provides a compressed gas heat exchange device, which can cool the hot compressed gas at the outlet of the gas compressor 1, purify it, and then heat it, so as to supply gas at a specified temperature to the rear gas system 5, and can make full use of the high temperature of the compressed gas at the outlet of the gas compressor 1 to achieve the reheating process. Figure 1 Schematic diagram of the structure of the compressed gas heat exchange device with a water cooler 3 provided in the embodiment of the present invention; Figure 1 As shown, the device includes:

[0020] A gas compressor 1, for outputting compressed gas;

[0021] An air-to-air heat exchanger 2, wherein a first input end of the air-to-air heat exchanger 2 is connected to an output end of the gas compressor 1, and is used for performing a first cooling on the output compressed gas;

[0022] A water cooler 3, wherein the input end of the water cooler 3 is connected to the first output end of the gas-to-gas heat exchanger 2, and when it is determined that the temperature of the compressed gas after the first cooling is higher than a preset threshold value (the preset threshold value is set to 20° C. in the present invention), the cooled compressed gas is cooled again;

[0023] A filter group 4, wherein the input end of the filter group 4 is connected to the output end of the water cooler 3, and is used to purify the cooled compressed gas; the output end of the filter group 4 is connected to the second input end of the gas-to-gas heat exchanger 2, and is used to heat the purified cooled compressed gas;

[0024] The second output end of the gas-to-gas heat exchanger 2 is connected to the input end of the rear gas system 5 for inputting the purified heated compressed gas into the rear gas system 5 .

[0025] The compressed gas heat exchange device further comprises: a temperature measuring instrument;

[0026] There are two temperature measuring instruments, one of which is connected to the first output end of the gas-to-gas heat exchanger 2 for detecting the temperature of the compressed gas after the first cooling; the other is connected to the second output end of the gas-to-gas heat exchanger 2 for detecting the temperature of the purified heated compressed gas.

[0027] Specifically, the hot compressed gas (up to about 90°C) at the outlet of the gas compressor 1 is first heat exchanged with the purified clean cold air. After the heat exchange, the pre-cooled hot gas is judged by the temperature measuring instrument to determine if the temperature of the compressed gas after the first cooling is higher than the preset threshold (the ambient temperature of 20°C in the present invention), it is cooled again by the water cooler 3 and then enters the purification system (filter group 4). The purified cold air goes to the air-to-air heat exchanger 2 to exchange heat with the hot compressed gas output by the gas compressor 1. The temperature measuring instrument detects whether the temperature of the purified heated compressed gas reaches the specified temperature. If so, the hot gas after the heat exchange is completed enters the rear cooling system.

[0028] Figure 2 This is a schematic structural diagram of a compressed gas heat exchange device without a water cooler 3 provided in an embodiment of the present invention. Figure 2 As shown, the device includes:

[0029] A gas compressor 1, for outputting compressed gas;

[0030] An air-to-air heat exchanger 2, wherein a first input end of the air-to-air heat exchanger 2 is connected to an output end of the gas compressor 1, and is used for performing a first cooling on the output compressed gas;

[0031] A filter group 4, wherein the input end of the filter group 4 is connected to the first output end of the gas-to-gas heat exchanger 2, and when it is determined that the temperature of the compressed gas after the first cooling is lower than or equal to a preset threshold value (the preset threshold value is set to 20° C. in the present invention), the cooled compressed gas is purified; the output end of the filter group 4 is connected to the second input end of the gas-to-gas heat exchanger 2, and is used to heat the purified cooled compressed gas;

[0032] The second output end of the gas-to-gas heat exchanger 2 is connected to the input end of the rear gas system 5 for inputting the purified heated compressed gas into the rear gas system 5 .

[0033] Specifically, the hot compressed gas (up to about 90°C) at the outlet of the gas compressor 1 is first heat exchanged with the purified clean cold air. After the heat exchange, the pre-cooled hot gas is judged by the temperature measuring instrument to be lower than or equal to the preset threshold value (the ambient temperature of 20°C in the present invention) after the temperature of the compressed gas after the first cooling. It then directly enters the purification system (filter group 4). The purified cold air goes to the air-to-air heat exchanger 2 to exchange heat with the hot compressed gas output by the gas compressor 1. The temperature measuring instrument detects whether the temperature of the purified heated compressed gas reaches the specified temperature. If so, the hot gas after the heat exchange is completed enters the rear cooling system.

[0034] It should be noted that the present invention does not limit the temperature of the preset threshold.

[0035] In an optional embodiment, the filter group 4 includes multiple filter elements, which can fully ensure the purification of the cold air.

[0036] In an optional embodiment, the gas-gas heat exchanger 2 is a plate-type gas-gas heat exchanger 2 , or a tubular gas-gas heat exchanger 2 , or a rotary gas-gas heat exchanger 2 .

[0037] In an optional embodiment, the water cooler 3 is a surface condenser.

[0038] In an optional embodiment, the water cooler 3 is a shell and tube water cooler 3; the shell and tube water cooler 3 includes: a double tube water cooler 3, a U-shaped tube water cooler 3, a vertical water cooler 3, and a horizontal water cooler 3.

[0039] Beneficial effects of the utility model:

[0040] The utility model provides a compressed gas heat exchange device, which includes: a gas compressor 1 for outputting compressed gas; an air-to-air heat exchanger 2, wherein a first input end of the air-to-air heat exchanger 2 is connected to an output end of the air compressor 1, and is used to perform a first cooling on the output compressed gas; a water cooler 3, wherein an input end of the water cooler 3 is connected to a first output end of the air-to-air heat exchanger 2, and when it is determined that the temperature of the compressed gas after the first cooling is higher than a preset threshold value, the cooled compressed gas is cooled again; a filter group 4, wherein an input end of the filter group 4 is connected to an output end of the water cooler 3, and is used to purify the cooled compressed gas; or an input end of the filter group 4 is connected to the first output end of the air-to-air heat exchanger 2, and when it is determined that the temperature of the compressed gas after the first cooling is lower than or equal to a preset threshold value, the cooled compressed gas is purified; an output end of the filter group 4 is connected to a second input end of the air-to-air heat exchanger 2, and is used to heat the purified cooled compressed gas; and a second output end of the air-to-air heat exchanger 2 is connected to an input end of a rear gas system 5, and is used to input the purified heated compressed gas into the rear gas system 5. The device can purify the cooled compressed gas and then reheat it to supply it to the rear gas system 5, and fully utilize the hot compressed gas output by the gas compressor 1 for heat exchange, thereby saving costs.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A compressed gas heat exchange device, characterized in that: include: A gas compressor for outputting compressed gas; an air-to-air heat exchanger, wherein a first input end of the air-to-air heat exchanger is connected to an output end of the gas compressor, and is used for performing a first cooling on the output compressed gas; a water cooler, wherein an input end of the water cooler is connected to the first output end of the air-to-air heat exchanger, and when it is determined that the temperature of the compressed gas after the first cooling is higher than a preset threshold, the compressed gas after the cooling is cooled again; a filter group, wherein the input end of the filter group is connected to the output end of the water cooler, and is used to purify the cooled compressed gas; or the input end of the filter group is connected to the first output end of the gas-to-gas heat exchanger, and when it is determined that the temperature of the compressed gas after the first cooling is lower than or equal to a preset threshold, the cooled compressed gas is purified; The output end of the filter group is connected to the second input end of the gas-to-gas heat exchanger for heating the purified cooled compressed gas; The second output end of the gas-to-gas heat exchanger is connected to the input end of the rear gas system for inputting the purified heated compressed gas into the rear gas system.

2. The device according to claim 1, characterized in that Also includes: Temperature measuring instrument; There are two temperature measuring instruments, one of which is connected to the first output end of the gas-to-gas heat exchanger for detecting the temperature of the compressed gas after the first cooling; the other is connected to the second output end of the gas-to-gas heat exchanger for detecting the temperature of the purified heated compressed gas.

3. The device according to claim 1, characterized in that: The filter group includes a plurality of filter elements.

4. The device according to claim 1, characterized in that: The gas-to-gas heat exchanger is a plate-type gas-to-gas heat exchanger, a tubular gas-to-gas heat exchanger, or a rotary gas-to-gas heat exchanger.

5. The device according to claim 1, characterized in that: The water cooler is a surface condenser.

6. The device according to claim 5, characterized in that: The water cooler is a shell and tube water cooler.

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