Tail gas recovery hydrogen compressor device capable of reducing cost

Abstract

The utility model discloses a tail gas recovery hydrogen compressor device capable of reducing cost, which comprises a hydrogen compressor (2), a hydrogen pipeline (5) and a nitrogen pipeline (4), the hydrogen pipeline (5) and the nitrogen pipeline (4) are connected with a main filler (24) and a piston rod (26) of the hydrogen compressor (2), and a bridging valve (1) is arranged between the hydrogen pipeline (5) and the nitrogen pipeline (4). The crossover valve (1) can be adjusted to be nitrogen as shielding gas, and the main filler (24) and the piston rod (26) are purged through the hydrogen pipeline (5) and the nitrogen pipeline (4).

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen compressors, and in particular to a tail gas recovery hydrogen compressor device with reduced costs. Background Art

[0002] Polysilicon is extracted from metallurgical grade silicon with low silicon purity. Since the main and auxiliary materials used in various polysilicon production plants are different, there are certain differences in production process technology. However, the polysilicon production process usually includes steps such as silicon synthesis, distillation, reduction, and tail gas recovery. The utility model is mainly a technical solution designed for the tail gas recovery link.

[0003] Since the exhaust gas recovery hydrogen compressor is a double-acting compressor during operation, the main packing on one side of the cylinder body cannot achieve complete mechanical sealing during operation. When the compressor is compressed, a small amount of material gas will leak into the hydrogen seal chamber, and then the hydrogen in the hydrogen seal chamber will be blown to the 807 pipe network to protect the material gas from leakage. When the compressor inhales, the main packing seal cannot be completely sealed. If the hydrogen seal chamber pressure is too high, the hydrogen in the hydrogen seal chamber will be brought into the system with the compressor. At the same time, hydrogen is used as a protective gas, and a large amount of electrolytic hydrogen is discharged during the protection process, resulting in energy waste and consumption, and causing the load of the exhaust gas treatment workshop to increase. Utility Model Content

[0004] The purpose of the utility model is to provide a tail gas recovery hydrogen compressor device with reduced cost in view of the above-mentioned problems currently existing, to change the hydrogen seal gas from hydrogen to nitrogen, to reduce the unit consumption of hydrogen, and to reduce the hydrogen consumption cost of the system.

[0005] The technical solution of the utility model is as follows:

[0006] A cost-reducing tail gas recovery hydrogen compressor device comprises a hydrogen compressor, a hydrogen pipeline and a nitrogen pipeline. The hydrogen pipeline and the nitrogen pipeline are connected to a main packing and a piston rod of the hydrogen compressor. A crossover valve is arranged between the hydrogen pipeline and the nitrogen pipeline. The crossover valve can be adjusted to allow nitrogen to be used as a protective gas to purge the main packing and the piston rod through the hydrogen pipeline and the nitrogen pipeline.

[0007] After the hydrogen seal gas is changed from hydrogen to nitrogen, the unit consumption of hydrogen will be reduced. The cost of hydrogen production is much higher than that of nitrogen production. Therefore, after changing to nitrogen, the system hydrogen consumption cost will be reduced.

[0008] Nitrogen is used as the protective gas for the hydrogen sealing chamber to purge the main packing and the piston rod, thereby protecting the purity of the system hydrogen and cooling the main packing of the piston rod.

[0009] Furthermore, the hydrogen compressor is a double-cylinder compressor.

[0010] Furthermore, the hydrogen compressor includes a left cylinder and a right cylinder.

[0011] Furthermore, a piston, a main filler, a nitrogen sealing chamber, a piston rod and a hydrogen sealing chamber are arranged in the left cylinder and the right cylinder.

[0012] Furthermore, a crankcase is arranged between the left cylinder and the right cylinder.

[0013] Furthermore, the hydrogen pipeline and the nitrogen pipeline are both connected to the main filler and the piston rod in the left cylinder and the right cylinder.

[0014] Furthermore, the hydrogen compressor is also connected to an oil collector.

[0015] Furthermore, the oil collector is connected to the main filler and the piston rod in the left cylinder and the right cylinder.

[0016] Compared with the existing technology, the beneficial effects of the utility model are:

[0017] 1. A cost-reducing tail gas recovery hydrogen compressor device. After the hydrogen seal gas is changed from hydrogen to nitrogen, the unit consumption of hydrogen will be reduced. The cost of hydrogen production is much higher than that of nitrogen production. Therefore, after changing to nitrogen, the system hydrogen consumption cost will be reduced;

[0018] 2. A cost-reducing tail gas recovery hydrogen compressor device uses nitrogen as the protective gas for hydrogen sealing chamber, purges the main packing and piston rod, and completes the protection of the system hydrogen purity and the cooling of the piston rod main packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a structural schematic diagram of a tail gas recovery hydrogen compressor device for reducing costs.

[0020] Figure numerals: 1-cross-over valve, 2-hydrogen compressor, 21-left cylinder, 22-right cylinder, 23-piston, 24-main filler, 25-nitrogen sealing chamber, 26-piston rod, 27-hydrogen sealing chamber, 28-crankcase, 3-oil collector, 4-nitrogen pipeline, 5-hydrogen pipeline. DETAILED DESCRIPTION

[0021] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0022] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0023] See also Figure 1 A cost-reducing tail gas recovery hydrogen compressor device includes a hydrogen compressor 2, a hydrogen pipeline 5 and a nitrogen pipeline 4, wherein the hydrogen pipeline 5 and the nitrogen pipeline 4 are connected to a main packing 24 and a piston rod 26 of the hydrogen compressor 2, and a jumper valve 1 is arranged between the hydrogen pipeline 5 and the nitrogen pipeline 4, and the jumper valve 1 can be adjusted to nitrogen as a protective gas to purge the main packing 24 and the piston rod 26 through the hydrogen pipeline 5 and the nitrogen pipeline 4.

[0024] After the hydrogen seal gas is changed from hydrogen to nitrogen, the unit consumption of hydrogen will be reduced. The cost of hydrogen production is much higher than that of nitrogen production. Therefore, after changing to nitrogen, the system hydrogen consumption cost will be reduced.

[0025] Nitrogen is used as the protective gas for the hydrogen sealing chamber to purge the main packing and the piston rod, thereby protecting the purity of the system hydrogen and cooling the main packing of the piston rod.

[0026] The hydrogen compressor 2 is a double-cylinder compressor.

[0027] The hydrogen compressor 2 includes a left cylinder 21 and a right cylinder 22 .

[0028] The left cylinder 21 and the right cylinder 22 are both provided with a piston 23, a main filler 24, a nitrogen sealing chamber 25, a piston rod 26 and a hydrogen sealing chamber 27.

[0029] A crankcase 28 is disposed between the left cylinder 21 and the right cylinder 22 .

[0030] The hydrogen pipeline 5 and the nitrogen pipeline 4 are both connected to the main filler 24 and the piston rod 26 in the left cylinder 21 and the right cylinder 22 .

[0031] The hydrogen compressor 2 is also connected to an oil collector 3 .

[0032] The oil collector 3 connects the main filler 24 and the piston rod 26 in the left cylinder 21 and the right cylinder 22 .

[0033] The nitrogen pipeline is also connected to a manual gate valve and a nitrogen pressure reducing valve. The manual gate valve is used to switch the hydrogen seal, and the pressure reducing valve is used to reduce the pressure of the high-pressure gas to meet the process requirements.

[0034] The working process of the hydrogen compressor is as follows: the hydrogen seal of the hydrogen compressor is produced by electrolysis of hydrogen in the air separation workshop, passes through the pressure reducing valve and reaches the hydrogen seal warehouse, and the main filler passes through the 807 exhaust pipeline.

[0035] After the hydrogen seal gas is changed from hydrogen to nitrogen, the unit consumption of hydrogen will be reduced. The cost of hydrogen production is much higher than that of nitrogen production. Therefore, after changing to nitrogen, the system hydrogen consumption cost will be reduced.

[0036] Nitrogen is used as the protective gas for the hydrogen sealing chamber to purge the main packing and the piston rod, thereby protecting the purity of the system hydrogen and cooling the main packing of the piston rod.

[0037] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A cost-reducing tail gas recovery hydrogen compressor device, characterized in that: The invention comprises a hydrogen compressor (2), a hydrogen pipeline (5) and a nitrogen pipeline (4), wherein the hydrogen pipeline (5) and the nitrogen pipeline (4) are connected to a main filler (24) and a piston rod (26) of the hydrogen compressor (2), and a crossover valve (1) is arranged between the hydrogen pipeline (5) and the nitrogen pipeline (4), and the crossover valve (1) can be adjusted so that nitrogen is used as a protective gas to purge the main filler (24) and the piston rod (26) through the hydrogen pipeline (5) and the nitrogen pipeline (4).

2. A cost-reducing tail gas recovery hydrogen compressor device according to claim 1, characterized in that: The hydrogen compressor (2) is a double-cylinder compressor.

3. A cost-reducing tail gas recovery hydrogen compressor device according to claim 2, characterized in that: The hydrogen compressor (2) comprises a left cylinder (21) and a right cylinder (22).

4. A cost-reducing tail gas recovery hydrogen compressor device according to claim 3, characterized in that: The left cylinder (21) and the right cylinder (22) are both provided with a piston (23), a main filler (24), a nitrogen sealing chamber (25), a piston rod (26) and a hydrogen sealing chamber (27).

5. A cost-reducing tail gas recovery hydrogen compressor device according to claim 3, characterized in that: A crankcase (28) is arranged between the left cylinder (21) and the right cylinder (22).

6. A cost-reducing tail gas recovery hydrogen compressor device according to claim 3, characterized in that: The hydrogen pipeline (5) and the nitrogen pipeline (4) are both connected to the main filler (24) and the piston rod (26) in the left cylinder (21) and the right cylinder (22).

7. A cost-reducing tail gas recovery hydrogen compressor device according to claim 6, characterized in that: The hydrogen compressor (2) is also connected to an oil collector (3).

8. A cost-reducing tail gas recovery hydrogen compressor device according to claim 7, characterized in that: The oil collector (3) is connected to the main filler (24) and the piston rod (26) in the left cylinder (21) and the right cylinder (22).

Images