Two-stage water vapor centrifugal compressor
By introducing an interstage liquid injection desuperheating device into a two-stage steam centrifugal compressor, the problems of reduced efficiency and increased energy consumption caused by the direct entry of exhaust gas into the next stage of compression are solved, achieving the effects of reduced energy consumption and increased exhaust saturated steam volume.
Patent Information
- Application Number
- CN202423294262.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing two-stage steam centrifugal compressors, the exhaust gas directly enters the next stage of compression, resulting in reduced aerodynamic efficiency and increased unit power consumption. Furthermore, traditional interstage coolers are inefficient, occupy a large area, and are costly.
An interstage liquid spray desuperheating device is adopted, including nozzles, mixers and main control circuits. The nozzles atomize the condensate into umbrella-shaped particles and mix them with the superheated gas. A Venturi mixer is used to ensure thorough mixing, and the desuperheating water volume is controlled by a regulating valve to ensure that the superheat of the next stage intake air is within a reasonable range.
It effectively reduces unit energy consumption, lowers design temperature, increases exhaust saturated steam volume, prevents liquid carryover in the next stage of compression medium, protects the impeller, and improves overall efficiency.
Smart Images
Figure CN223511140U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of compressor technology, and relates to a centrifugal compressor, and more particularly to a two-stage steam centrifugal compressor. Background Technology
[0002] After compression, the exhaust gas from a two-stage steam centrifugal compressor unit is superheated. If it directly enters the next stage of compression, it will lead to a decrease in the aerodynamic efficiency of the next stage, an increase in the unit's power consumption, and an excessively high design temperature for the entire unit. Traditional interstage coolers not only have low heat exchange efficiency but also require a large footprint and are costly.
[0003] In view of this, there is an urgent need to design a new two-stage steam centrifugal compressor in order to overcome at least some of the aforementioned defects of existing two-stage steam centrifugal compressors. Utility Model Content
[0004] This invention provides a two-stage steam centrifugal compressor that can reduce unit energy consumption and design temperature while ensuring that the next stage compression medium is free of liquid, and also increases the amount of saturated steam discharged from the unit.
[0005] To solve the above-mentioned technical problems, according to one aspect of this utility model, the following technical solution is adopted:
[0006] A two-stage steam centrifugal compressor, comprising: a first-stage compression unit, an interstage liquid injection desuperheating device, a regulating valve, a temperature sensor, a pressure transmitter, a second-stage compression unit, and a main control circuit;
[0007] The output end of the first-stage compression unit is connected to the input end of the interstage liquid spraying de-heating device, and the output end of the interstage liquid spraying de-heating device is connected to the second-stage compression unit through a delivery pipeline.
[0008] The delivery pipeline is equipped with a temperature sensor and a pressure transmitter; the liquid spraying and cooling device is connected to a cooling water delivery pipeline, which delivers cooling water to the interstage liquid spraying and cooling device, and the cooling water delivery pipeline is equipped with a regulating valve.
[0009] The main control circuit is connected to the regulating valve, temperature sensor, and pressure transmitter respectively; the output terminal of the temperature sensor is connected to the input terminal of the main control circuit, the output terminal of the pressure transmitter is connected to the input terminal of the main control circuit, and the output terminal of the main control circuit is connected to the input terminal of the regulating valve.
[0010] As one embodiment of this utility model, the interstage spray cooling device includes a nozzle and a mixer, wherein the nozzle is connected to the mixer.
[0011] In one embodiment of this utility model, the nozzle fully atomizes the condensate into umbrella-shaped particles to ensure thorough mixing with the superheated gas; the mixer adopts a Venturi type to ensure thorough mixing of the superheated gas and the condensate.
[0012] In one embodiment of this utility model, the regulating valve is a pneumatic regulating valve or an electric regulating valve.
[0013] In one embodiment of this utility model, the output end of the first-stage compression unit is connected to the input end of the interstage spray cooling device through a second delivery pipeline.
[0014] In one embodiment of this utility model, a second pressure transmitter is provided in the second delivery pipeline.
[0015] In one embodiment of this utility model, the desuperheating water conveying pipeline is equipped with a third pressure transmitter.
[0016] In one embodiment of this utility model, an expansion joint is provided between the first-stage compression unit and the interstage spray cooling device.
[0017] In one embodiment of this utility model, a second expansion joint is provided between the interstage spray cooling device and the second-stage compression unit.
[0018] In one embodiment of this utility model, the desuperheating water conveying pipeline is further provided with a first shut-off valve, a second shut-off valve, a third shut-off valve, and a check valve; the desuperheating water conveying pipeline is provided with a desuperheating water conveying main pipeline, a first desuperheating water conveying pipeline, and a second desuperheating water conveying pipeline connected in parallel; the first desuperheating water conveying pipeline is connected in series with a first shut-off valve, a regulating valve, and a second shut-off valve, and the second desuperheating water conveying pipeline is provided with a second regulating valve; the desuperheating water conveying main pipeline is provided with a check valve.
[0019] The beneficial effects of this utility model are as follows: The two-stage steam centrifugal compressor proposed in this utility model can reduce the unit's energy consumption and design temperature while ensuring that the next stage compression medium is free of liquid, and also increase the unit's exhaust saturated steam volume. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the composition of a two-stage steam centrifugal compressor in one embodiment of the present invention.
[0021] Figure 2 This is a schematic diagram of the structure of a two-stage steam centrifugal compressor in one embodiment of the present invention. Detailed Implementation
[0022] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0023] To further understand this utility model, preferred embodiments of this utility model are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the scope of the claims of this utility model.
[0024] The description in this section pertains to only a few typical embodiments, and this utility model is not limited to the scope of the embodiments described. Substitution of identical or similar prior art methods with some technical features in the embodiments is also within the scope of this utility model's description and protection.
[0025] The term "connection" in the instruction manual includes both direct and indirect connections.
[0026] This utility model discloses a two-stage steam centrifugal compressor. Figure 1 This is a schematic diagram of the composition of a two-stage steam centrifugal compressor in one embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a two-stage steam centrifugal compressor according to one embodiment of the present invention; please refer to [link / reference]. Figure 1 , Figure 2 The two-stage steam centrifugal compressor includes: a first-stage compression unit 1, an interstage liquid spraying desuperheating device 2, a regulating valve 3, a temperature sensor 4, a pressure transmitter 5, a second-stage compression unit 6, and a main control circuit 7.
[0027] The output end of the first-stage compression unit 1 is connected to the input end of the interstage spray cooling device 2, and the output end of the interstage spray cooling device 2 is connected to the second-stage compression unit 6 through a delivery pipeline. The delivery pipeline is equipped with a temperature sensor 4 and a pressure transmitter 5; the interstage spray cooling device 2 is connected to a cooling water delivery pipeline 8, and the cooling water delivery pipeline 8 is equipped with a regulating valve 3.
[0028] The main control circuit 7 is connected to the regulating valve 3, the temperature sensor 4, and the pressure transmitter 5 respectively; the output terminal of the temperature sensor 4 is connected to the input terminal of the main control circuit 7, the output terminal of the pressure transmitter 5 is connected to the input terminal of the main control circuit 7, and the output terminal of the main control circuit 7 is connected to the input terminal of the regulating valve 3.
[0029] In one embodiment of this utility model, the interstage spray cooling device 2 includes a nozzle and a mixer; the nozzle is connected to the mixer. The nozzle fully atomizes the condensate into umbrella-shaped particles to ensure thorough mixing with the superheated gas; the mixer adopts a Venturi design to ensure thorough mixing of the superheated gas and the condensate.
[0030] An expansion joint 16 is provided between the first-stage compression unit 1 and the interstage spray cooling device 2 (i.e., the second delivery pipeline 9 is provided with an expansion joint 16); a second expansion joint 17 is provided between the interstage spray cooling device 2 and the second-stage compression unit 6 (i.e., the third delivery pipeline 18 between the interstage spray cooling device 2 and the second-stage compression unit 6 is provided with a second expansion joint 17).
[0031] The output end of the first-stage compression unit 1 is connected to the input end of the interstage spray cooling device 2 through the second delivery pipeline 9; the second delivery pipeline 9 is equipped with a second pressure transmitter 10, and the cooling water delivery pipeline 8 is equipped with a third pressure transmitter 11.
[0032] The desuperheating water delivery pipeline is equipped with a first shut-off valve 12, a second shut-off valve 13, a check valve 14, and a second regulating valve 15. The desuperheating water delivery pipeline 8 consists of a main desuperheating water delivery pipeline, a first desuperheating water delivery pipeline, and a second desuperheating water delivery pipeline connected in parallel. The first desuperheating water delivery pipeline is connected in series with the first shut-off valve 12, the regulating valve 3, and the second shut-off valve 13. The second desuperheating water delivery pipeline is equipped with the second regulating valve 15. The main desuperheating water delivery pipeline is equipped with the check valve 14. The regulating valve 3 and the second regulating valve 15 can be pneumatic or electric regulating valves.
[0033] In one application scenario of this utility model, the exhaust pressure after compressor compression is fully mixed with desuperheating water in the liquid injection desuperheating device before entering the next stage of compression. The opening of the regulating valve is controlled by PLC to determine the amount of desuperheating water injected, ensuring that the superheat of the steam in the next stage of intake is within the allowable range. The interstage liquid injection desuperheating energy-saving method can economically and effectively reduce the temperature of the next stage of intake, reduce the power consumption of the unit, and also reduce the design temperature of the unit and increase the amount of saturated steam in the exhaust.
[0034] A two-stage steam centrifugal compressor can consist of an interstage liquid injection desuperheating device (containing nozzles and a mixer), pneumatic or electric regulating valves, temperature sensors (or temperature transmitters), pressure transmitters, and a control system. This design ensures that the next stage of compressed medium is free of liquid, thereby reducing unit energy consumption, lowering the unit's design temperature, and increasing the unit's exhaust saturated steam output.
[0035] In one application scenario of this utility model, the main control circuit 7 can obtain the steam superheat at that location through the temperature sensor 4 and the pressure transmitter 5, and determine the valve opening degree and valve switching speed of the interstage liquid spraying desuperheating device 2 based on the steam superheat, so as to ensure that the steam superheat is controlled within a reasonable range and to avoid liquid carryover in the next stage compression medium, which could damage the next stage impeller.
[0036] The desuperheating water can be fully mixed with the superheated gas in the previous stage through the interstage spray desuperheating device, avoiding liquid carryover in the next stage of compressed medium due to uneven mixing.
[0037] In summary, the two-stage steam centrifugal compressor proposed in this invention can reduce unit energy consumption and lower the unit's design temperature while ensuring that the next stage compression medium is free of liquid, and also increase the unit's exhaust saturated steam volume.
[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0039] The description and application of this utility model herein are illustrative and not intended to limit the scope of the utility model to the above embodiments. The effects or advantages involved in the embodiments may not be manifested in the embodiments due to various factors, and the description of effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and various substitutions and equivalents of the components in the embodiments are well known to those skilled in the art. It should be clear to those skilled in the art that this utility model can be implemented in other forms, structures, arrangements, proportions, and with other components, materials, and parts without departing from the spirit or essential characteristics of this utility model. Other variations and modifications can be made to the embodiments disclosed herein without departing from the scope and spirit of this utility model.
Claims
1. A two-stage steam centrifugal compressor, characterized in that, The two-stage steam centrifugal compressor includes: a first-stage compression unit, an interstage liquid injection desuperheating device, a regulating valve, a temperature sensor, a pressure transmitter, a second-stage compression unit, and a main control circuit; The output end of the first-stage compression unit is connected to the input end of the interstage liquid spraying de-heating device, and the output end of the interstage liquid spraying de-heating device is connected to the second-stage compression unit through the first delivery pipeline. The first delivery pipeline is equipped with a first temperature sensor and a first pressure transmitter; the interstage spray cooling device is connected to a cooling water delivery pipeline, which delivers cooling water to the interstage spray cooling device, and the cooling water delivery pipeline is equipped with a regulating valve. The main control circuit is connected to the regulating valve, temperature sensor, and pressure transmitter respectively; the output terminal of the temperature sensor is connected to the input terminal of the main control circuit, the output terminal of the pressure transmitter is connected to the input terminal of the main control circuit, and the output terminal of the main control circuit is connected to the input terminal of the regulating valve.
2. The two-stage steam centrifugal compressor according to claim 1, characterized in that: The interstage spray cooling device includes a nozzle and a mixer, with the nozzle connected to the mixer.
3. The two-stage steam centrifugal compressor according to claim 2, characterized in that: The nozzle atomizes the condensate into umbrella-shaped particles to ensure thorough mixing with the superheated gas; the mixer is of the Venturi type to ensure thorough mixing of the superheated gas and the condensate.
4. The two-stage steam centrifugal compressor according to claim 1, characterized in that: The regulating valve is either a pneumatic regulating valve or an electric regulating valve.
5. The two-stage steam centrifugal compressor according to claim 1, characterized in that: The output of the first-stage compression unit is connected to the input of the interstage spray cooling device via a second delivery pipeline.
6. The two-stage steam centrifugal compressor according to claim 5, characterized in that: The second delivery pipeline is equipped with a second pressure transmitter.
7. The two-stage steam centrifugal compressor according to claim 1, characterized in that: The desuperheating water delivery pipeline is equipped with a third pressure transmitter.
8. The two-stage steam centrifugal compressor according to claim 1, characterized in that: An expansion joint is provided between the first-stage compression unit and the interstage liquid spraying cooling device.
9. The two-stage steam centrifugal compressor according to claim 1, characterized in that: A second expansion joint is provided between the interstage spray cooling device and the second-stage compression unit.
10. The two-stage steam centrifugal compressor according to claim 1, characterized in that: The desuperheating water delivery pipeline is equipped with a first shut-off valve, a second shut-off valve, a check valve, and a second regulating valve; the desuperheating water delivery pipeline is equipped with a desuperheating water delivery main pipeline, a first desuperheating water delivery pipeline, and a second desuperheating water delivery pipeline connected in parallel; The first desuperheating water delivery pipeline is connected in series with a first shut-off valve, a regulating valve and a second shut-off valve, and the second desuperheating water delivery pipeline is equipped with a second regulating valve; the desuperheating water delivery main pipeline is equipped with a check valve.