A recycling system for return gas from packing of reciprocating circulating gas compressor

Abstract

The utility model discloses a recycling system for return gas from packing of a reciprocating circulating gas compressor, comprising a packing box of the circulating gas compressor, a semi-water gas tank and a gas recovery pipe, wherein a packing leakage gas pipeline is fixedly installed on one side of the packing box of the circulating gas compressor, and an oil-gas separator is connected to the end of the packing leakage gas pipeline away from the packing box of the circulating gas compressor; compared with the prior art, the utility model can collect the leakage gases of the packing boxes of multiple reciprocating circulating gas compressors into one packing leakage gas pipeline, and the gas separated from the oil through the oil-gas separator is merged into the gas recovery pipe through the separation gas delivery pipe and the gas tank discharge pipe of the semi-water gas tank, and is uniformly sent to the desulfurization system for recycling, and the separated oil is also recycled, which solves the problem of gas waste and avoids environmental pollution. At the same time, the recycled oil is used as a lubricant in the oiler of the reciprocating circulating gas compressor, thereby achieving the dual benefits of cost reduction and efficiency improvement and environmental protection.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating gas compressors, in particular to a system for recycling return gas of a packing of a reciprocating circulating gas compressor. Background Art

[0002] Ammonia synthesis unit has multiple reciprocating circulating gas compressors at the post, and when the unit is running continuously, each reciprocating circulating gas compressor has four sets of packing to seal the moving piston rod to prevent high-pressure gas from leaking into the atmosphere. However, the existing technology cannot completely prevent leakage, which causes effective gas waste and environmental pollution. At the same time, the gas leaked from the packing is high in hydrogen, which poses a safety risk of flammability and explosion. Therefore, the recovery of the leaked gas from the packing box of the reciprocating circulating gas compressor has become a thorny issue.

[0003] At present, since the synthetic circulating gas contains a large amount of high-pressure hydrogen and nitrogen, which are not used as raw materials for synthetic ammonia, and the ammonia content is about 3.5%, it causes great waste. If it leaks into the atmosphere on site, it will cause environmental pollution problems such as excessive ammonia content in the environment and heavy ammonia smell. Based on the above factors, the inventor has carried out technical transformation, and the utility model proposes a recycling system for the return gas of the packing of a reciprocating circulating gas compressor. Utility Model Content

[0004] The utility model aims to provide a system for recycling return air from a packing of a reciprocating circulating gas compressor, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a recycling system for return gas from packing of a reciprocating circulating gas compressor, comprising a packing box of a circulating gas compressor, a semi-water gas gasholder and a gas recovery pipe, a packing leakage gas pipeline being fixedly installed on one side of the circulating gas compressor packing box, an end of the packing leakage gas pipeline away from the circulating gas compressor packing box is connected to an oil-gas separator, an end of the oil-gas separator away from the packing leakage gas pipeline is connected to a separation gas delivery pipe, a gasholder exhaust pipe is provided at one end of the semi-water gas gasholder, and the output end of the separation gas delivery pipe and the output end of the gasholder exhaust pipe are both connected to the input end of the gas recovery pipe.

[0006] As a preferred technical solution of the utility model, a gas leakage detection tube is installed on the packing leakage gas pipeline, and a gas leakage detection valve is provided on the gas leakage detection tube.

[0007] As a preferred technical solution of the utility model, a vent pipe is installed on the separation gas delivery pipe, and a vent valve is installed on the vent pipe.

[0008] As a preferred technical solution of the utility model, a recovery oil discharge pipe is installed at the bottom of the oil-gas separator, a valve is provided on the recovery oil discharge pipe, and the recovery oil discharge pipe is used for recovering the separated oil.

[0009] As a preferred technical solution of the utility model, the input end of the semi-water gas gas holder is connected to a gas-making semi-water gas pipe.

[0010] As a preferred technical solution of the utility model, two sides of the circulating air compressor stuffing box are respectively connected with a cooling water inlet pipe and a cooling water outlet pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model discloses a recycling system for return gas from packing of a reciprocating circulating gas compressor, which can collect leaked gases from packing boxes of multiple reciprocating circulating gas compressors onto a packing leakage gas pipeline, and the gas separated from the oil passes through an oil-gas separator, and is combined with a gas tank discharge pipe of a semi-water gas tank into a gas recovery pipe, and is uniformly sent to a desulfurization system for recycling, while the separated oil is also recycled, thus solving the problem of gas waste and avoiding environmental pollution. At the same time, the recycled oil is used as a lubricant in the oiler of the reciprocating circulating gas compressor, thereby achieving the dual benefits of cost reduction, efficiency improvement and environmental protection.

[0013] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] In the figure: 1. stuffing box of circulating gas compressor; 2. gas pipeline for stuffing leakage; 3. oil-gas separator; 4. separation gas delivery pipe; 5. semi-water gas tank; 6. gas tank discharge pipe; 7. gas recovery pipe; 8. gas leakage detection pipe; 9. gas leakage detection valve; 10. vent pipe; 11. vent valve; 12. cooling water inlet pipe; 13. cooling water outlet pipe; 14. recovered oil discharge pipe; 15. gasification semi-water gas pipe. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1 In the present embodiment, a recycling system for return gas from packing of a reciprocating circulating gas compressor is provided, comprising a packing box 1 of a circulating gas compressor, a semi-water gas tank 5 and a gas recovery pipe 7, a packing leakage gas pipeline 2 is fixedly installed on one side of the circulating gas compressor packing box 1, an end of the packing leakage gas pipeline 2 away from the circulating gas compressor packing box 1 is connected to an oil-gas separator 3, an end of the oil-gas separator 3 away from the packing leakage gas pipeline 2 is connected to a separation gas delivery pipe 4, a gas tank discharge pipe 6 is provided at one end of the semi-water gas tank 5, an output end of the separation gas delivery pipe 4 and an output end of the gas tank discharge pipe 6 are both connected to the input end of the gas recovery pipe 7, a gas-making semi-water gas pipe 15 is connected to the input end of the semi-water gas tank 5, and both sides of the circulating gas compressor packing box 1 are separated. A cooling water inlet pipe 12 and a cooling water outlet pipe 13 are separately connected, and the output end of the gas recovery pipe 7 is connected to the desulfurization system circulation. The leaked gases from the stuffing boxes of multiple reciprocating circulating gas compressors can be collected on a stuffing leakage gas pipeline 2. The gas separated from the oil passes through the oil-gas separator 3 and is merged into the gas recovery pipe 7 through the separation gas delivery pipe 4 and the gas tank discharge pipe 6 of the semi-water gas tank 5, and is uniformly sent to the desulfurization system for recycling, and the separated oil is also recycled, and a large amount of hydrogen, nitrogen and a small amount of ammonia in the leaked gas are recovered, which not only saves resources, but also avoids environmental pollution, that is, solves the waste of gas and avoids environmental pollution. At the same time, the recovered oil is used in the reciprocating circulating gas compressor oiler as a lubricant, achieving the dual benefits of cost reduction and efficiency improvement and environmental protection.

[0020] In this embodiment, a gas leakage detection tube 8 is installed on the packing leakage gas pipeline 2, and a gas leakage detection valve 9 is provided on the gas leakage detection tube 8. The gas leakage detection valve 9 is specifically a stop valve. The size of the leakage can be judged by the pressure of the stop valve. According to the size of the leakage, it is determined whether to replace the circulating machine packing, so that the leakage of the circulating machine packing is always controlled within an acceptable range.

[0021] In this embodiment, a vent pipe 10 is installed on the separation gas delivery pipe 4, and a vent valve 11 is installed on the vent pipe 10. The vent pipe 10 is used to discharge gas, which can release pressure and prevent safety hazards caused by excessive pressure in an emergency.

[0022] In this embodiment, a recovery oil discharge pipe 14 is installed at the bottom of the oil-gas separator 3, and a valve is provided on the recovery oil discharge pipe 14. The recovery oil discharge pipe 14 is used to separate the recovery of oil. The oil discharged through the recovery oil discharge pipe 14 can be used as a lubricant in the circulating machine oiler for recycling and reuse.

[0023] In summary, the technical solution of the present application can solve the long-standing problems of serious waste of high-pressure synthesis gas and easy environmental pollution in the ammonia synthesis station. Not only is the gas effectively recovered and reused, but the separated oil is also reused as a lubricant, achieving the dual benefits of cost reduction, efficiency improvement and environmental protection.

[0024] 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 system for recycling return gas from a reciprocating circulating gas compressor, characterized in that: The invention comprises a circulating gas compressor stuffing box (1), a semi-water gas gas holder (5) and a gas recovery pipe (7); a stuffing leakage gas pipeline (2) is fixedly installed on one side of the circulating gas compressor stuffing box (1); an end of the stuffing leakage gas pipeline (2) away from the circulating gas compressor stuffing box (1) is connected to an oil-gas separator (3); an end of the oil-gas separator (3) away from the stuffing leakage gas pipeline (2) is connected to a separation gas delivery pipe (4); a gas holder discharge pipe (6) is provided at one end of the semi-water gas gas holder (5); the output end of the separation gas delivery pipe (4) and the output end of the gas holder discharge pipe (6) are both connected to the input end of the gas recovery pipe (7).

2. A reciprocating cycle gas compressor packing return gas recovery system according to claim 1, characterized in that: A gas leakage detection tube (8) is installed on the packing leakage gas pipeline (2), and a gas leakage detection valve (9) is provided on the gas leakage detection tube (8).

3. A reciprocating cycle gas compressor packing return gas recovery system according to claim 1, characterized in that: The separation gas delivery pipe (4) is provided with a vent pipe (10), and the vent pipe (10) is provided with a vent valve (11). The vent pipe (10) is used for discharging gas.

4. A reciprocating cycle gas compressor packing return gas recovery system according to claim 1, characterized in that: A recovered oil discharge pipe (14) is installed at the bottom of the oil-gas separator (3), and a valve is provided on the recovered oil discharge pipe (14). The recovered oil discharge pipe (14) is used for recovering separated oil.

5. The system for recycling return gas from a reciprocating circulating gas compressor according to claim 1, characterized in that: The input end of the semi-water gas tank (5) is connected to a gas-making semi-water gas pipe (15).

6. A reciprocating cycle gas compressor packing return gas recovery system according to claim 1, characterized in that: The two sides of the circulating gas compressor stuffing box (1) are respectively connected to a cooling water inlet pipe (12) and a cooling water outlet pipe (13).

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