Anti-surge device for water vapor compressor and control method
By installing a water spray device in the outlet pipe of a steam compressor, room temperature water is sprayed in through atomizing nozzles to exchange heat with steam, thus solving the problems of high cost and high energy consumption of traditional anti-surge methods and achieving the effect of anti-surge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-02
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional anti-surge methods in steam compressors have drawbacks such as high cost, complex structure, poor adaptability to operating conditions, and high energy consumption, and cannot effectively prevent surge.
A water spray device is installed at the compressor outlet pipe. Room temperature water is sprayed through atomizing nozzles to exchange heat with steam, thereby reducing pressure and temperature and preventing surge.
It effectively prevents surge, simplifies the structure, reduces energy consumption, and improves adaptability to different operating conditions.
Smart Images
Figure CN121828253A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of water vapor compressor anti-surge, in particular to an anti-surge device and control method for water vapor compressor. BACKGROUND
[0002] Centrifugal compressors are widely used in metallurgy, petrochemical, refrigeration and other industries, and their running stability is crucial to the entire system. Surge is a common non-steady state phenomenon of centrifugal compressors, which can cause severe consequences such as unit vibration, seal damage, and impeller damage. Traditional anti-surge methods mostly use anti-surge valves to vent or return outlet gas to the inlet, which can alleviate surge, but has the disadvantages of high cost, complex structure, poor working condition adaptation, and high energy consumption. SUMMARY
[0003] The purpose of the present application is to provide an anti-surge device and control method for water vapor compressor, which can prevent surge from occurring.
[0004] The technical solution of the present application is as follows: An anti-surge device for water vapor compressor, comprising a water injection device arranged at the outlet pipe of the compressor; the water injection device comprises a connecting pipe fixed at the outlet pipe, the lower end of the connecting pipe extending into the outlet pipe; the bottom of the connecting pipe is communicated with a water delivery pipe, and the lower end of the water delivery pipe is fixed with an atomizing nozzle; the top of the connecting pipe is communicated with a water supply pipe.
[0005] Further, the top of the connecting pipe is fixed with a first connecting flange, the first connecting flange is connected with a second connecting flange through bolt and nut connection, the top of the second connecting flange is fixed with the water supply pipe, and the lower end of the water supply pipe is communicated with the upper end of the water delivery pipe.
[0006] Further, the top of the water supply pipe is fixed with a third connecting flange, and the third connecting flange is connected with a fourth connecting flange through bolt and nut connection.
[0007] Further, there is a gasket between the third connecting flange and the fourth connecting flange.
[0008] Further, the water injection direction of the atomizing nozzle is at an angle to the steam flow direction.
[0009] An anti-surge control method for water vapor compressor, the method is as follows: Step 1: Real-time monitoring of steam temperature and steam pressure of the outlet pipe of the compressor; Step 2: When the steam temperature and steam pressure fluctuate greatly, i.e. close to the surge point; Step 3: the normal temperature water is flowed into the supply water pipe, and the normal temperature water is sprayed into the outlet pipe through the atomizing nozzle to exchange heat with the steam, so that the pressure and temperature of the steam are reduced to prevent the surge.
[0010] Further, in the step 1, the steam pressure is monitored by the pressure transmitter, and the steam temperature is monitored by the temperature transmitter.
[0011] Further, the top of the fourth connecting flange is connected with the external water pipe, and the water valve, the pressure transmitter and the temperature transmitter of the external water pipe are communicated with the PLC. The step 2 is further specifically that when the steam temperature and the steam pressure fluctuate greatly, the pressure transmitter and the temperature transmitter send the signal close to the surge. The step 3 is further specifically that after the PLC receives the signal, the water valve is controlled to be opened to flow the normal temperature water into the supply water pipe, and the normal temperature water is flowed into the water pipe, and the normal temperature water is sprayed into the outlet pipe through the atomizing nozzle to exchange heat with the steam, so that the pressure and temperature of the steam are reduced.
[0012] Further, the step 4 is further included that when the steam temperature and the steam pressure are reduced and tend to be stable, the surge risk is eliminated, and at this time, the water valve is controlled to be closed by the PLC.
[0013] The beneficial effects of the present application are as follows: The water valve of the external water pipe is opened to flow the normal temperature water into the supply water pipe when the compressor is close to the surge point, and the normal temperature water is flowed into the water pipe, and the normal temperature water is sprayed into the outlet pipe through the atomizing nozzle to exchange heat with the steam, so that the pressure and temperature of the steam are reduced to prevent the surge.
[0014] The water spraying direction of the atomizing nozzle is at an angle with the steam flow direction, so that the mixing effect of the normal temperature water and the steam can be optimized.
[0015] In summary, the present application can prevent the surge. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a structural schematic view of the water spraying device; Figure 2 is Figure 1 is an enlarged view of A of the water spraying device; Figure 3 is a schematic view of the water spraying device installed in the outlet pipe.
[0017] In the figure: the outlet pipe 100, the connecting pipe 1, the water pipe 2, the atomizing nozzle 3, the supply water pipe 4, the first connecting flange 5, the second connecting flange 6, the third connecting flange 7, the fourth connecting flange 8, and the gasket 9. DETAILED DESCRIPTION
[0018] The present application will be further described below in combination with the drawings.
[0019] Referring to Figures 1-3 The present application provides a first embodiment of an anti-surge device for a water vapor compressor, comprising a water injection device arranged at an outlet pipe 100 of the compressor; the water injection device comprises a connecting pipe 1 fixed at the outlet pipe 100, the lower end of the connecting pipe 1 extending into the outlet pipe 100; the bottom of the connecting pipe 1 is connected with a water delivery pipe 2, the lower end of the water delivery pipe 2 being fixed with an atomizing nozzle 3; the top of the connecting pipe 1 is connected with a water supply pipe 4. The water supply pipe 4 is connected with an external water pipe, when the compressor approaches a surge point, the water valve of the external water pipe is opened, normal temperature water is introduced into the water supply pipe 4, the normal temperature water flows to the water delivery pipe 2, and the normal temperature water is sprayed into the outlet pipe 100 through the atomizing nozzle 3 to fully exchange heat with the steam, so as to reduce the pressure and temperature of the steam and prevent surge.
[0020] On the basis of the first embodiment, the present application provides a second embodiment of an anti-surge device for a water vapor compressor, the top of the connecting pipe 1 is fixed with a first connecting flange 5, the first connecting flange 5 is connected with a second connecting flange 6 through a bolt and nut connection mode, the top of the second connecting flange 6 is fixed with the water supply pipe 4, and the lower end of the water supply pipe 4 is connected with the upper end of the water delivery pipe 2.
[0021] The top of the water supply pipe 4 is fixed with a third connecting flange 7, and the third connecting flange 7 is connected with a fourth connecting flange 8 through a bolt and nut connection mode. The lower end of the external water pipe is connected with the water supply pipe 4 through the fourth connecting flange 8.
[0022] When it is necessary to disassemble and replace the water supply pipe 4, the second connecting flange 6 and the first connecting flange 5 can be separated through the bolt and nut connection mode, the third connecting flange 7 and the fourth connecting flange 8 can be separated, and thus the water supply pipe 4 can be disassembled and replaced.
[0023] Since the diameters of the external water pipes on site are different, the fourth connecting flange 8 with different hole diameters can be replaced through the bolt and nut connection mode, so that the external water pipes with different diameters can be adapted.
[0024] On the basis of any one of the above embodiments, the present application provides a third embodiment of an anti-surge device for a water vapor compressor, a gasket 9 is arranged between the third connecting flange 7 and the fourth connecting flange 8, the gap between the third connecting flange 7 and the fourth connecting flange 8 can be sealed, and the tightness is improved.
[0025] On the basis of any one of the above embodiments, the present application provides a fourth embodiment of an anti-surge device for a water vapor compressor, the water spraying direction of the atomizing nozzle 3 forms an angle with the steam flow direction, so that the mixing effect of the normal temperature water and the steam can be optimized.
[0026] Based on any one of the above-mentioned device embodiments, the present application provides a first embodiment of an anti-surge control method for a water vapor compressor, the method being as follows: Step 1: Real-time monitoring of the vapor temperature and vapor pressure of the compressor outlet pipeline; Step 2: When the vapor temperature and vapor pressure fluctuate greatly, i.e., close to the surge point; Step 3: Normal-temperature water is introduced into the water supply pipe, flows to the water delivery pipe, and is sprayed into the outlet pipeline through an atomizing nozzle to fully exchange heat with the vapor, thereby reducing the pressure and temperature of the vapor and preventing surge.
[0027] Based on the first embodiment of the method, the present application provides a second embodiment of an anti-surge control method for a water vapor compressor, in step 1, the vapor pressure is monitored by a pressure transmitter, and the vapor temperature is monitored by a temperature transmitter.
[0028] Based on any one of the above-mentioned method embodiments, the present application provides a third embodiment of an anti-surge control method for a water vapor compressor, the top of the fourth connecting flange is connected to an external water pipe, and the water valve, pressure transmitter, and temperature transmitter of the external water pipe are in communication connection with the PLC; Step 2 is further specified as follows: when the vapor temperature and vapor pressure fluctuate greatly, the pressure transmitter and the temperature transmitter send a signal indicating that surge is approaching; Step 3 is further specified as follows: after receiving the signal, the PLC controls the water valve to open to introduce normal-temperature water into the water supply pipe, so that the normal-temperature water flows to the water delivery pipe and is sprayed into the outlet pipeline through an atomizing nozzle to fully exchange heat with the vapor, thereby reducing the pressure and temperature of the vapor. By controlling the water valve through the PLC, the size of the normal-temperature water can also be adjusted, thereby adjusting the water spraying amount.
[0029] Based on any one of the above-mentioned method embodiments, the present application provides a fourth embodiment of an anti-surge control method for a water vapor compressor, further comprising step 4: when the vapor temperature and vapor pressure are reduced and tend to be stable, i.e., out of the risk of surge, the PLC controls the water valve to be closed at this time.
[0030] It should be noted that the present application is not only applicable to water vapor centrifugal compressors, but also can be popularized to the anti-surge control of other condensable gas compressors.
[0031] The above-mentioned is only a preferred embodiment of the present application, and should not be understood as a limitation on the present application. Any equivalent changes and modifications made within the scope of the present application should be included in the scope of the present application.
Claims
1. An anti-surge device for a steam compressor, characterized in that, The device includes a water spraying device installed in the compressor outlet pipe; the water spraying device includes a connecting pipe fixed to the outlet pipe, the lower end of the connecting pipe extending into the outlet pipe; the bottom of the connecting pipe is connected to a water supply pipe, the lower end of the water supply pipe is fixed with an atomizing nozzle; the top of the connecting pipe is connected to a water supply pipe.
2. The anti-surge device for a steam compressor according to claim 1, characterized in that, A first connecting flange is fixed to the top of the connecting pipe. The first connecting flange is connected to a second connecting flange by bolts and nuts. The water supply pipe is fixed to the top of the second connecting flange. The lower end of the water supply pipe is connected to the upper end of the water delivery pipe.
3. The anti-surge device for a steam compressor according to claim 2, characterized in that, The top of the water supply pipe is fixed to the third connecting flange, and the third connecting flange is connected to the fourth connecting flange by bolts and nuts.
4. The anti-surge device for a steam compressor according to claim 3, characterized in that, A gasket is provided between the third connecting flange and the fourth connecting flange.
5. The anti-surge device for a steam compressor according to claim 1, characterized in that, The water spray direction of the atomizing nozzle is at an angle to the steam flow direction.
6. A surge control method for a steam compressor, characterized in that, The method of using the anti-surge device for a steam compressor according to any one of claims 1-5 is as follows: Step 1: Monitor the steam temperature and steam pressure of the compressor outlet pipe in real time; Step 2: When the steam temperature and steam pressure fluctuate significantly, it indicates that the surge point is approaching. Step 3: Pass room temperature water into the water supply pipe, allowing the water to flow into the water delivery pipe. Then, spray the room temperature water into the outlet pipe through the atomizing nozzle to fully exchange heat with the steam, reducing its pressure and temperature and preventing surge.
7. The anti-surge control method for a steam compressor according to claim 6, characterized in that, In step 1, the steam pressure is monitored by a pressure transmitter and the steam temperature is monitored by a temperature transmitter.
8. The anti-surge control method for a steam compressor according to claim 7, characterized in that, The top of the fourth connecting flange is connected to an external water pipe, and the water valve, pressure transmitter, and temperature transmitter of the external water pipe are connected to the PLC for communication. Step 2 is further specified as follows: when the steam temperature and steam pressure fluctuate greatly, the pressure transmitter and temperature transmitter emit a near surge signal. Step 3 is further specified as follows: After receiving the signal, the PLC controls the water valve to open and introduce room temperature water into the water supply pipe, so that the room temperature water flows into the water delivery pipe and is sprayed into the outlet pipe through the atomizing nozzle to fully exchange heat with the steam, thereby reducing its pressure and temperature.
9. A surge control method for a steam compressor according to claim 8, characterized in that, It also includes step 4: when the steam temperature and steam pressure decrease and tend to stabilize, the risk of surge is eliminated, and at this time the PLC controls the water valve to close.