Overflow condensate recovery device of atmospheric safety valve

Abstract

The utility model discloses an overflow condensate recovery device for an atmospheric safety valve. The overflow condensate recovery device comprises an atmospheric safety valve drainage pipeline, an air compressor impeller flushing water tank, a condensate recovery pump and a condensate recovery pipe network, the atmospheric safety valve drainage pipeline is respectively connected with a sewage pipe network and an air compressor impeller flushing water tank through a first branch pipeline and a second branch pipeline; the air compressor impeller flushing water tank is respectively connected with a condensate recovery pipeline and a condensate backflow pipeline, the condensate recovery pipeline is connected with a condensate recovery pipe network, and a condensate recovery pump is arranged on the condensate recovery pipeline; and the condensate backflow pipeline is connected with the condensate recovery pipeline. The device has the advantages that most condensate enters the air compressor impeller flushing water tank for secondary recycling, so that the treatment pressure on a pipe network caused by the fact that the condensate is directly discharged into the sewage pipe network is reduced, and environmental protection is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical fields of thermal energy engineering and environmental engineering, in particular to an atmospheric safety valve overflow condensate recovery device. Background Art

[0002] The existing air separation unit steam turbine atmospheric safety valve is a protective device to prevent overpressure in the low-pressure cylinder of the steam turbine. Under normal circumstances, the turbine condensate is used as the atmospheric safety valve water seal to ensure the normal operation of the turbine vacuum system. To ensure the effectiveness of the water seal, the condensate of the atmospheric safety valve water seal needs to maintain a small amount of overflow water.

[0003] In actual applications, the condensate overflowing from the atmospheric safety valve will be directly discharged into the sewage network. This direct discharge treatment method not only causes energy waste, but also increases the difficulty of sewage treatment. Utility Model Content

[0004] The utility model aims to provide an atmospheric safety valve overflow condensate recovery device, thereby solving the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An atmospheric safety valve overflow condensate recovery device comprises an atmospheric safety valve drainage pipeline, an air compressor impeller flushing water tank, a condensate recovery pump and a condensate recovery pipe network; the atmospheric safety valve drainage pipeline is connected to a sewage pipe network and an air compressor impeller flushing water tank through a first branch pipeline and a second branch pipeline respectively; a stop valve V1 and a stop valve V2 are respectively provided on the first branch pipeline and the second branch pipeline;

[0007] The air compressor impeller flushing water tank is respectively connected to a condensate recovery pipe and a condensate return pipe, the condensate recovery pipe is connected to the condensate recovery pipe network, and the condensate recovery pipe is sequentially provided with an inlet valve V3, a condensate recovery pump and an outlet valve V4 along the internal liquid flow direction; the condensate return pipe is connected to the condensate recovery pipe, and the connection point is located between the inlet valve V3 and the outlet valve V4, and a return valve V5 is provided on the condensate return pipe.

[0008] Preferably, a liquid level gauge is provided in the air compressor impeller flushing water tank.

[0009] Preferably, the liquid level meter includes a remote liquid level meter and an on-site liquid level meter.

[0010] Preferably, a pressure gauge P is provided on the condensate recovery pipeline, and the pressure gauge P is located between the connection point between the condensate reflux pipeline and the condensate recovery pipeline and the condensate recovery pump.

[0011] Preferably, the outlet end of the atmospheric safety valve drainage pipe is connected to a three-way valve, and the first branch pipe and the second branch pipe are both connected to the outlet end of the atmospheric safety valve drainage pipe through the three-way valve.

[0012] The beneficial effects of the utility model are as follows: 1. The condensate is collected in the air compressor impeller flushing water tank as flushing liquid, so as to realize the recycling of the condensate. 2. Most of the condensate enters the air compressor impeller flushing water tank for secondary recycling, which reduces the processing pressure on the pipe network caused by the condensate directly discharged into the sewage pipe network, which is beneficial to environmental protection. 3. The recycled condensate can be sent to the condensate recovery pipe network through a recovery pump for recycling again, and can be used as boiler supplementary water, etc., which greatly saves fuel, chemical treatment and water consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the recovery device in the embodiment of the utility model. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0015] During the normal operation of the air separation unit, the turbine atmospheric safety valve uses turbine condensate as a water seal to ensure the normal operation of the turbine vacuum system. To ensure the effectiveness of the water seal, the condensate of the atmospheric safety valve water seal is kept at a small amount of overflow. In the prior art, the overflow condensate of the atmospheric safety valve water seal is directly discharged into the sewage network, which easily causes energy waste and increases the difficulty of sewage treatment. Figure 1 As shown, in this embodiment, an atmospheric safety valve overflow condensate recovery device is provided, including an atmospheric safety valve drainage pipeline, an air compressor impeller flushing water tank, a condensate recovery pump and a condensate recovery pipe network; the atmospheric safety valve drainage pipeline is connected to the sewage pipe network and the air compressor impeller flushing water tank through a first branch pipeline and a second branch pipeline respectively; the first branch pipeline and the second branch pipeline are respectively provided with a stop valve V1 and a stop valve V2;

[0016] The air compressor impeller flushing water tank is respectively connected to a condensate recovery pipe and a condensate return pipe, the condensate recovery pipe is connected to the condensate recovery pipe network, and the condensate recovery pipe is sequentially provided with an inlet valve V3, a condensate recovery pump and an outlet valve V4 along the internal liquid flow direction; the condensate return pipe is connected to the condensate recovery pipe, and the connection point is located between the inlet valve V3 and the outlet valve V4, and a return valve V5 is provided on the condensate return pipe.

[0017] In the recovery device of the utility model, the stop valve V1 is in a normally closed state, the stop valve V2 is in a normally open state, and the condensate overflowing from the atmospheric safety valve water seal enters the air compressor impeller flushing water tank through the atmospheric safety valve drainage pipeline and the second branch pipe for recycling. When the liquid level in the flushing water tank reaches 80%, the inlet valve V3, the outlet valve V4 and the reflux valve V5 are opened, the condensate recovery pump is started, and the reflux valve V5 is gradually closed until the water pressure after the condensate recovery pump reaches 0.5Mpa, thereby sending the condensate into the condensate recovery pipe network. When the liquid level in the flushing water tank is lower than 20%, the condensate recovery pump is stopped. When the device stops working, the stop valve V2 can be closed, the stop valve V1 can be opened, and the small amount of condensate remaining in the pipeline can be discharged into the sewage pipe network.

[0018] In actual use, the overflow condensate of the atmospheric safety valves of multiple air separation units is converged into the atmospheric safety valve drainage pipe, and the atmospheric safety overflow condensate of multiple air separation units is recycled and utilized at the same time, reducing the processing pressure of the sewage network and improving the utilization rate of the condensate.

[0019] In this embodiment, a liquid level gauge is provided in the air compressor impeller flushing water tank. Specifically, the liquid level gauge includes a remote liquid level gauge and an on-site liquid level gauge.

[0020] A remote level gauge and an on-site level gauge are installed in the air compressor impeller flushing water tank to monitor the liquid level of the flushing water tank in real time, thereby determining the start time and frequency of the condensate recovery pump. This can avoid the problem of equipment damage caused by low flushing water tank level and insufficient water inlet of the condensate recovery pump when the condensate recovery pump is started due to the lack of liquid level monitoring. At the same time, in order to facilitate liquid level monitoring and on-site staff to observe and operate, on-site level gauges and remote level gauges are installed. The local level gauge is convenient for on-site staff to observe and operate, and the remote level gauge is convenient for central control personnel to remotely monitor the flushing water tank level.

[0021] In this embodiment, a pressure gauge P is provided on the condensate recovery pipeline, and the pressure gauge P is located between the connection point between the condensate return pipeline and the condensate recovery pipeline and the condensate recovery pump. The setting of the pressure gauge can more intuitively obtain the water pressure after the condensate recovery pump.

[0022] In this embodiment, the outlet end of the atmospheric safety valve drainage pipeline is connected to a three-way valve, and the first branch pipeline and the second branch pipeline are both connected to the outlet end of the atmospheric safety valve drainage pipeline through the three-way valve.

[0023] By adopting the above technical solution disclosed in the utility model, the following beneficial effects are obtained:

[0024] The utility model provides an atmospheric safety valve overflow condensate recovery device, which collects the condensate into the air compressor impeller flushing water tank as flushing liquid, thereby realizing the recycling of the condensate. Most of the condensate enters the air compressor impeller flushing water tank for secondary recycling, which reduces the processing pressure on the sewage pipe network caused by the condensate being directly discharged into the sewage pipe network, which is beneficial to environmental protection. The recycled condensate can be sent to the condensate recovery pipe network through a recovery pump for recycling again, and can be used as boiler supplementary water, etc., which greatly saves fuel, chemical treatment and water consumption.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An atmospheric safety valve overflow condensate recovery device, characterized in that: It includes an atmospheric safety valve drainage pipeline, an air compressor impeller flushing water tank, a condensate recovery pump and a condensate recovery pipeline network; the atmospheric safety valve drainage pipeline is connected to the sewage pipeline network and the air compressor impeller flushing water tank through a first branch pipeline and a second branch pipeline respectively; the first branch pipeline and the second branch pipeline are respectively provided with a stop valve V1 and a stop valve V2; The air compressor impeller flushing water tank is respectively connected to a condensate recovery pipe and a condensate return pipe, the condensate recovery pipe is connected to the condensate recovery pipe network, and the condensate recovery pipe is sequentially provided with an inlet valve V3, a condensate recovery pump and an outlet valve V4 along the internal liquid flow direction; the condensate return pipe is connected to the condensate recovery pipe, and the connection point is located between the inlet valve V3 and the outlet valve V4, and a return valve V5 is provided on the condensate return pipe.

2. The atmospheric safety valve overflow condensate recovery device according to claim 1, characterized in that: A liquid level gauge is provided in the air compressor impeller flushing water tank.

3. The atmospheric safety valve overflow condensate recovery device according to claim 2, characterized in that: The liquid level meter includes a remote liquid level meter and an on-site liquid level meter.

4. The atmospheric safety valve overflow condensate recovery device according to claim 1, characterized in that: The condensate recovery pipeline is provided with a pressure gauge P, and the pressure gauge P is located between the connection point between the condensate reflux pipeline and the condensate recovery pipeline and the condensate recovery pump.

5. The atmospheric safety valve overflow condensate recovery device according to claim 1, characterized in that: The outlet end of the atmospheric safety valve drainage pipeline is connected to a three-way valve, and the first branch pipeline and the second branch pipeline are both connected to the outlet end of the atmospheric safety valve drainage pipeline through the three-way valve.

Images