Double-channel dehumidification system for dehumidifying air and nitrogen

Abstract

The utility model discloses a double-channel dehumidification system for dehumidifying air and nitrogen, which comprises a small-sized heatless drying system, a first external compressed air inlet, a second external compressed air inlet, a second external compressed air inlet, a second external compressed air inlet, a third external compressed air inlet, a fourth external compressed air inlet and a fourth external compressed air inlet, wherein the small-sized heatless drying system is used for accelerating separation of moisture in a plastic raw material; the high-purity nitrogen system is used for protecting the plastic raw materials; a second external compressed air inlet butted with external compressed air is formed in the high-purity nitrogen system; the hot air circulating system is communicated with the small-sized heatless drying system and the high-purity nitrogen system and is used for heating the dehumidified air on the small-sized heatless drying system and the high-purity nitrogen on the high-purity nitrogen system; and the PLC control system is used for controlling the small heatless drying system, the high-purity nitrogen system and the hot air circulating system to work.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic dehumidification and drying, in particular to a dual-channel dehumidification system for dehumidifying air and nitrogen. Background Art

[0002] At present, conventional dehumidification dryers on the market use honeycomb rotary dehumidification for dehumidification and drying. During the drying process, plastic particles are prone to yellowing and the drying and dehumidification effect does not meet the requirements. When nitrogen drying is used, special pipelines and nitrogen generators are required, which have high operating costs and occupy a large amount of workshop area. It cannot be used for drying large-volume materials.

[0003] Therefore, the applicant has found a solution to the above-mentioned problem through beneficial exploration and research, and the technical solution to be introduced below is produced in this context. Utility Model Content

[0004] In order to address the deficiencies of the prior art, the utility model provides a dual-channel dehumidification dryer of a dehumidification system device of dehumidified air and nitrogen to enhance the drying effect of plastic materials, so as to solve the above problems.

[0005] The technical problem to be solved by the present invention can be achieved by adopting the following technical solutions:

[0006] A dual-channel dehumidification system for dehumidifying air and nitrogen, characterized by comprising:

[0007] A small heatless drying system for accelerating the separation of moisture in plastic raw materials, wherein the small heatless drying system is provided with a first external compressed air inlet connected to external compressed air;

[0008] A high-purity nitrogen system for protecting plastic raw materials, wherein the high-purity nitrogen system is provided with a second external compressed air inlet connected to external compressed air;

[0009] a hot air circulation system connected to the small heatless drying system and the high-purity nitrogen system and used to heat the dehumidified air on the small heatless drying system and the high-purity nitrogen on the high-purity nitrogen system, and

[0010] A PLC control system for controlling the small heatless drying system, high purity nitrogen system and hot air circulation system.

[0011] In a preferred embodiment of the utility model, the small heatless drying system includes a first triplet, a small heatless dryer, a first air filter, a one-way throttle valve, and a first solenoid valve, which are arranged in sequence from right to left. One end of the first triplet is connected to the first external compressed air inlet through a first air pipe, the other end of the first triplet is connected to one end of the small heatless dryer through a second air pipe, the other end of the small heatless dryer is connected to one end of the first air filter through a third air pipe, the other end of the first air filter is connected to one end of the one-way throttle valve through a fourth air pipe, the other end of the one-way throttle valve is connected to one end of the first solenoid valve through a fifth air pipe, and one end of the first solenoid valve is connected to the hot air circulation system through a sixth air pipe.

[0012] In a preferred embodiment of the utility model, the high-purity nitrogen system includes a second triplet, a high-purity nitrogen generator, a second air filter, a flow regulator, and a second solenoid valve, which are arranged in sequence from right to left. One end of the second triplet is connected to the second external compressed air inlet through a seventh air pipe, and the other end of the second triplet is connected to one end of the high-purity nitrogen generator through an eighth air pipe. The other end of the high-purity nitrogen generator is connected to one end of the second air filter through a ninth air pipe, and the other end of the second air filter is connected to one end of the flow regulator through a tenth air pipe. The other end of the flow regulator is connected to one end of the second solenoid valve through an eleventh cylinder, and the other end of the second solenoid valve is connected to the hot air circulation system through a twelfth air pipe.

[0013] In a preferred embodiment of the utility model, the hot air circulation system includes a heat-resistant blower, a first hot air filter, a heater, a drying barrel, and a second hot air filter, one end of the heat-resistant blower is connected to one end of the first hot air filter through a first pipe, the other end of the first hot air filter is connected to one end of the heater through a second pipe, the other end of the heater is connected to the side of the drying barrel through a third pipe, the top of the drying barrel is connected to one end of the second hot air filter through a fourth pipe, and the other end of the second hot air filter is connected to the other end of the heat-resistant blower through a fifth pipe.

[0014] In a preferred embodiment of the present utility model, the second hot air filter is connected to the exhaust solenoid valve through a sixth pipeline.

[0015] In a preferred embodiment of the present invention, the hot air circulation system also includes a differential pressure gauge for monitoring the pressure on both sides of the second hot air filter, one end of the differential pressure gauge is connected to the second hot air filter through the thirteenth air pipe through the fourth pipe, and the other end of the differential pressure gauge is connected to the second hot air filter through the fourteenth air pipe through the fifth pipe.

[0016] Due to the adoption of the above technical scheme, the beneficial effect of the utility model is that the utility model accelerates the separation of moisture in plastic raw materials with dehumidified air, protects the plastic raw materials with high-purity nitrogen, ensures that the materials produce an oxidation reaction under corresponding drying temperature conditions, and improves the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0020] See also Figure 1 A dual-channel dehumidification system for dehumidified air and nitrogen is shown, comprising a small heatless drying system 100, a high-purity nitrogen system 200, and a hot air circulation system 300.

[0021] The small heatless drying system 100 is used to accelerate the separation of moisture in the plastic raw material. The small heatless drying system 100 is provided with a first external compressed air inlet 1 connected to the external compressed air. The small heatless drying system 100 in this embodiment includes a first triplet 3, a small heatless dryer 4, a first air filter 5, a one-way throttle valve 6, and a first solenoid valve 18, which are arranged from right to left in sequence. One end of the first triplet 3 is connected to the first external compressed air inlet 1 through a first air pipe 101, and the other end of the first triplet 3 is connected to one end of the small heatless dryer 4 through a second air pipe 102. The other end of the small heatless dryer 4 is connected to one end of the first air filter 5 through a third air pipe 103, and the other end of the first air filter 5 is connected to one end of the one-way throttle valve 6 through a fourth air pipe 104. The other end of the one-way throttle valve 6 is connected to one end of the first solenoid valve 18 through a fifth air pipe 105, and one end of the first solenoid valve 18 is connected to the hot air circulation system 300 through a sixth air pipe 106.

[0022] The high-purity nitrogen system 200 is used to protect the plastic raw materials, and the high-purity nitrogen system 200 is provided with a second external compressed air inlet 2 connected to the external compressed air. The high-purity nitrogen system 200 in this embodiment includes a second triplet 7, a high-purity nitrogen generator 8, a second air filter 9, a flow regulator 10, and a second solenoid valve 19, which are sequentially arranged from right to left. One end of the second triplet 7 is connected to the second external compressed air inlet 2 through the seventh air pipe 107, and the other end of the second triplet 7 is connected to one end of the high-purity nitrogen generator 8 through the eighth air pipe 108. The other end of the high-purity nitrogen generator 8 is connected to one end of the second air filter 9 through the ninth air pipe 109, and the other end of the second air filter 9 is connected to one end of the flow regulator 10 through the tenth air pipe 110. The other end of the flow regulator 10 is connected to one end of the second solenoid valve 19 through the eleventh air pipe 111, and the other end of the second solenoid valve 19 is connected to the hot air circulation system 300 through the twelfth air pipe 112. Specifically, since the purity of high-purity nitrogen needs to be guaranteed, a flow regulator 10 is installed at the outlet of the second air filter 9 to ensure that the purity of the nitrogen in the drying barrel is always maintained to complete the drying process of the plastic raw materials.

[0023] The hot air circulation system 300 is connected to the small heatless drying system 100 and the high-purity nitrogen system 200 and is used to heat the dehumidified air on the small heatless drying system 100 and the high-purity nitrogen on the high-purity nitrogen system 200. The hot air circulation system 300 in this embodiment includes a heat-resistant blower 11, a first hot air filter 12, a heater 13, a drying barrel 14, and a second hot air filter 15. One end of the heat-resistant blower 11 is connected to one end of the first hot air filter 12 through a first pipe 201, the other end of the first hot air filter 12 is connected to one end of the heater 13 through a second pipe 202, the other end of the heater 13 is connected to the side of the drying barrel 14 through a third pipe 203, the top of the drying barrel 14 is connected to one end of the second hot air filter 15 through a fourth pipe 204, and the other end of the second hot air filter 15 is connected to the other end of the heat-resistant blower 11 through a fifth pipe 205.

[0024] The second hot air filter 15 is connected to the exhaust solenoid valve 16 through the sixth pipeline 206. Due to the continuous injection of high-purity nitrogen and dehumidified air, an exhaust solenoid valve 16 is installed on the second hot air filter 15 to allow excess humid air to be discharged from the exhaust solenoid valve 16 to complete the drying process of the plastic raw materials.

[0025] The hot air circulation system 300 further includes a differential pressure gauge 17 for monitoring the pressure on both sides of the second hot air filter 15. One end of the differential pressure gauge 17 is connected to the second hot air filter 15 through the thirteenth air pipe 113 and the fourth pipe 204, and the other end of the differential pressure gauge 17 is connected to the second hot air filter 15 through the fourteenth air pipe 114 and the fifth pipe 205. The hot air circulation system in this embodiment is connected with a differential pressure gauge 17, and the function of the differential pressure gauge 17 is to judge whether the filter element needs to be replaced by the pressure difference on both sides of the second hot air filter 15.

[0026] The working principle of the utility model is as follows:

[0027] External compressed air enters the first dehumidification channel from the external compressed air inlet 1, and is sent to the small heatless dryer 4 after being filtered by the first triplex 3. The small heatless dryer 4 generates dehumidified air when it works. The dehumidified air is then filtered by the first air filter 5, and then controlled by the one-way throttle valve 6. The dehumidified air is input to the first pipeline 201 through the fifth air pipe 105, the first solenoid valve 18, and the sixth air pipe 106, and then filtered by the first hot air filter 12 and sent to the entire hot air circulation system.

[0028] External compressed air enters the second dehumidification channel from the external compressed air inlet 2, and is input into the high-purity nitrogen generator 8 after being filtered by the second triplex 7. The high-purity nitrogen generator 8 generates high-purity nitrogen when it works. The high-purity nitrogen is filtered by the air filter 9, and the flow rate is adjusted by the flow regulator 10. After the flow rate is switched by the second solenoid valve 19, the tenth air pipe 110 is input into the second pipeline 202 and then transported to the entire hot air circulation system.

[0029] The functions of the first solenoid valve 18 and the second solenoid valve 19 are to use the first solenoid valve 18 of the first channel to switch the dehumidified air to dehumidify the material at the initial stage. After the dew point is stable, the first solenoid valve 18 stops working and switches the second solenoid valve 19 to work, so that the high-purity nitrogen gas of the second channel enters the material to dehumidify.

[0030] The power of the heat-resistant blower 11 blows a large flow of dehumidified air and high-purity nitrogen into the heater 13. The heater 13 heats the large flow of dehumidified air and high-purity nitrogen to generate high-temperature dehumidified air and nitrogen. The high-temperature dehumidified air and nitrogen enter the drying barrel 14 through the third pipe 203, pass through the plastic raw materials from the bottom of the drying barrel 14 upward, take out the moisture of the plastic raw materials and return to the top of the drying barrel 14, enter the second hot air filter 15 through the fourth pipe 204, separate the dust in the second hot air filter 15, and then the two gases enter the fifth pipe 205, and then enter the heat-resistant blower 11, finally forming a hot air circulation loop.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A dual-channel dehumidification system for dehumidified air and nitrogen, characterized in that: include: A small heatless drying system for accelerating the separation of moisture in plastic raw materials, wherein the small heatless drying system is provided with a first external compressed air inlet connected to external compressed air; A high-purity nitrogen system for protecting plastic raw materials, wherein the high-purity nitrogen system is provided with a second external compressed air inlet connected to external compressed air; a hot air circulation system connected to the small heatless drying system and the high-purity nitrogen system and used to heat the dehumidified air on the small heatless drying system and the high-purity nitrogen on the high-purity nitrogen system, and A PLC control system for controlling the operation of the small heatless drying system, the high-purity nitrogen system, and the hot air circulation system; The small heatless drying system includes a first triplet, a small heatless dryer, a first air filter, a one-way throttle valve, and a first solenoid valve, which are arranged in sequence from right to left. One end of the first triplet is connected to a first external compressed air inlet through a first air pipe, the other end of the first triplet is connected to one end of the small heatless dryer through a second air pipe, the other end of the small heatless dryer is connected to one end of the first air filter through a third air pipe, the other end of the first air filter is connected to one end of the one-way throttle valve through a fourth air pipe, the other end of the one-way throttle valve is connected to one end of the first solenoid valve through a fifth air pipe, and one end of the first solenoid valve is connected to the hot air circulation system through a sixth air pipe; The high-purity nitrogen system includes, from right to left, a second triplet, a high-purity nitrogen generator, a second air filter, a flow regulator, and a second solenoid valve, one end of the second triplet is connected to the second external compressed air inlet through a seventh air pipe, the other end of the second triplet is connected to one end of the high-purity nitrogen generator through an eighth air pipe, the other end of the high-purity nitrogen generator is connected to one end of the second air filter through a ninth air pipe, the other end of the second air filter is connected to one end of the flow regulator through a tenth air pipe, the other end of the flow regulator is connected to one end of the second solenoid valve through an eleventh air cylinder, and the other end of the second solenoid valve is connected to the hot air circulation system through a twelfth air pipe; The hot air circulation system includes a heat-resistant blower, a first hot air filter, a heater, a drying barrel, and a second hot air filter. One end of the heat-resistant blower is connected to one end of the first hot air filter through a first pipe, the other end of the first hot air filter is connected to one end of the heater through a second pipe, the other end of the heater is connected to the side of the drying barrel through a third pipe, the top of the drying barrel is connected to one end of the second hot air filter through a fourth pipe, and the other end of the second hot air filter is connected to the other end of the heat-resistant blower through a fifth pipe.

2. A dual-channel dehumidification system for dehumidified air and nitrogen according to claim 1, characterized in that: The second hot air filter is connected to the exhaust solenoid valve through a sixth pipeline.

3. A dual-channel dehumidification system for dehumidified air and nitrogen according to claim 1, characterized in that: The hot air circulation system also includes a differential pressure gauge for monitoring the pressure on both sides of the second hot air filter, one end of the differential pressure gauge is connected to the second hot air filter through the thirteenth air pipe through the fourth pipe, and the other end of the differential pressure gauge is connected to the second hot air filter through the fourteenth air pipe through the fifth pipe.

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