Condensate recovery ORC turbine power generation device

Abstract

The utility model belongs to chemical industry, concretely relates to a condensed water recovery ORC turbine power generation device. The device includes the device includes condensed liquid flash tank, first condensed liquid cooler and second condensed liquid cooler, comes from the condensed liquid of boundary steam condensed liquid and first condensed liquid cooler is connected, and the cold side output end of first condensed liquid cooler is connected through primary evaporator with first condensed liquid cooler, the working medium output end of primary evaporator is connected in proper order through first separator, and the gas output end of first separator is connected through first turbine generator and first mixer, and the liquid output of first separator is connected with first mixer through first high temperature regenerator, first mixer is connected in proper order through first low temperature regenerator, first condenser, first liquid storage tank, first circulating working medium pump and first low temperature regenerator, and the cold side output end of first low temperature regenerator is connected with primary evaporator through first high temperature regenerator in proper order. The utility model has reduced production device circulating water consumption.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat utilization and production operation technology of steam condensate recovery system in chemical plant, specifically relating to a condensate recovery ORC turbine power generation device. Background Technology

[0002] In the steam condensate recovery system of a chemical plant, various low-temperature steam condensates from throughout the plant need to be collected and reused. These low-temperature condensates are approximately 120-140°C and are considered low-grade heat sources. In traditional processes, the condensate is typically cooled to around 40°C by circulating water in a condensate cooler before being returned to the circulating water system for reuse.

[0003] The main shortcomings of the above process and equipment are that the use of circulating water to cool the steam condensate does not effectively recover the heat of the steam condensate, and it also requires a large amount of circulating water, resulting in a great waste of energy and increasing the production and operation costs of the equipment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a condensate recovery ORC turbine power generation device. This device can effectively recover and utilize the heat in low-temperature steam condensate for by-product power generation, reducing the consumption of circulating water in the production unit and improving the operating efficiency of the unit.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A condensate recovery ORC turbine power generation unit includes a condensate flash tank, a first condensate cooler, and a second condensate cooler. Steam condensate from outside the boundary is connected to the first condensate cooler, and the cold-side output end of the first condensate cooler is connected to the first condensate cooler through a primary evaporator.

[0007] The working fluid output of the first-stage evaporator is connected in sequence to the first separator. The gas output of the first separator is connected to the first turbine generator and the first mixer. The liquid output of the first separator is connected to the first mixer through the first high-temperature regenerator. The first mixer is connected in sequence to the first low-temperature regenerator, the first condenser, the first liquid storage tank, the first circulating working fluid pump, and the first low-temperature regenerator. The cold-side output of the first low-temperature regenerator is connected to the first-stage evaporator in sequence through the first high-temperature regenerator.

[0008] In this utility model's technical solution: the hot side output end of the first condensate cooler is connected to the second condensate cooler, and the cold side output of the second condensate cooler is connected to the second condensate cooler through the second evaporator;

[0009] The working fluid output of the second evaporator is connected in sequence to the second separator. The gas output of the second separator is connected in sequence to the second turbine generator and the second mixer. The liquid output of the second separator is connected to the second mixer through the second high-temperature regenerator. The second mixer is connected in sequence to the second low-temperature regenerator, the second condenser, the second liquid storage tank, the second circulating working fluid pump, and the second low-temperature regenerator. The cold side output of the second low-temperature regenerator is connected to the second evaporator in sequence through the second high-temperature regenerator.

[0010] In this utility model technical solution: the pipe connecting the first condensate cooler and the second condensate cooler is provided with a pipe diversion, one of which outputs to the outside, and the other outputs high-temperature condensate connected to the second condensate cooler, and the low-temperature condensate of the second condensate cooler is output to the outside.

[0011] In this utility model's technical solution: the output end of the condensate flash tank pipeline is connected to the inlet of the condensate transfer pump, and the outlet pipeline of the condensate transfer pump is connected to the hot-side input end of the first condensate cooler; a portion of the high-temperature condensate at the hot-side output end of the first condensate cooler is connected to the hot-side input end of the second condensate cooler, and the low-temperature condensate pipeline at the hot-side output end of the second condensate cooler is sent to the outside.

[0012] The beneficial effects of this utility model are as follows: The device includes a condensate flash tank, a condensate transfer pump, a condensate cooler, an ORC turbine power generation system, and several pipelines. It can effectively recover and utilize the heat in the low-temperature steam condensate for by-product power generation, reduce the consumption of circulating water in the production unit, and improve the operating efficiency of the unit. Attached Figure Description

[0013] Figure 1 This is a flowchart illustrating the present invention.

[0014] In the diagram: 1 is the condensate flash tank, 2 is the condensate transfer pump, 3-1 is the first condensate cooler, 3-2 is the second condensate cooler, 4 is the first ORC power generation system, 401 is the first-stage evaporator, 402 is the first separator, 403 is the first turbine generator, 404 is the first high-temperature regenerator, 405 is the first mixer, 406 is the first low-temperature regenerator, 407 is the first condenser, 408 is the first storage tank, 409 is the first circulating working fluid pump, 5 is the second ORC power generation system, 501 is the second evaporator, 502 is the second separator, 503 is the second turbine generator, 504 is the second high-temperature regenerator, 505 is the second mixer, 56 is the second low-temperature regenerator, 507 is the second condenser, 508 is the second storage tank, and 509 is the second circulating working fluid pump. Detailed Implementation

[0015] The present invention will be further described below with reference to embodiments, but the scope of protection of the present invention is not limited thereto:

[0016] like Figure 1 As shown, a condensate recovery ORC turbine power generation device includes a condensate flash tank 1, a first condensate cooler 3-1 and a second condensate cooler 3-2. Steam condensate from outside the boundary is connected to the first condensate cooler 3-1. The cold side output end of the first condensate cooler 3-1 is connected to the first condensate cooler 3-1 through a first-stage evaporator 401.

[0017] The working fluid output end of the first-stage evaporator 401 is connected in sequence to the first separator 402. The gas output end of the first separator 402 is connected to the first turbine generator 403 and the first mixer 405. The liquid output of the first separator 402 is connected to the first mixer 405 through the first high-temperature regenerator 404. The first mixer 405 is connected in sequence to the first low-temperature regenerator 406, the first condenser 407, the first liquid storage tank 408, the first circulating working fluid pump 409, and the first low-temperature regenerator 406. The cold-side output end of the first low-temperature regenerator 406 is connected to the first-stage evaporator 401 in sequence through the first high-temperature regenerator 404.

[0018] The hot side output of the first condensate cooler 3-1 is connected to the second condensate cooler 3-2, and the cold side output of the second condensate cooler 3-2 is connected to the second condensate cooler 3-2 through the second evaporator 501.

[0019] The working fluid output end of the secondary evaporator 501 is connected in sequence to the second separator 502. The gas output end of the second separator 502 is connected in sequence to the second turbine generator 503 and the second mixer 505. The liquid output of the second separator 502 is connected to the second mixer 505 through the second high-temperature regenerator 504. The second mixer 505 is connected in sequence to the second low-temperature regenerator 506, the second condenser 507, the second liquid storage tank 508, the second circulating working fluid pump 509, and the second low-temperature regenerator 506. The cold side output end of the second low-temperature regenerator 506 is connected to the secondary evaporator 501 in sequence through the second high-temperature regenerator 504.

[0020] The pipes connecting the first condensate cooler 3-1 and the second condensate cooler 3-2 are equipped with a pipe splitting system. One output goes outside the boundary, while the high-temperature condensate from the other output is connected to the second condensate cooler 3-2. The low-temperature condensate from the second condensate cooler 3-2 is output outside the boundary.

[0021] The outlet end of the condensate flash tank 1 is connected to the inlet of the condensate transfer pump 2, and the outlet pipe of the condensate transfer pump 2 is connected to the hot side input end of the first condensate cooler 3-1; a portion of the high-temperature condensate at the hot side output end of the first condensate cooler 3-1 is connected to the hot side input end of the second condensate cooler 3-2, and the low-temperature condensate at the hot side output end of the second condensate cooler 3-2 is sent to the outside of the boundary.

[0022] The working process of this utility model is as follows: Steam condensate from outside the boundary enters the condensate flash tank for collection, and after being pressurized by the condensate transfer pump, it enters a two-stage condensate cooler for cooling. The resulting low-temperature condensate is sent outside the boundary for reuse. The circulating working fluid from the high-temperature regenerator enters the evaporator for heating, and after passing through the separator, it enters the turbine generator to generate electricity. It then passes sequentially through the mixer, low-temperature regenerator, condenser, storage tank, circulating working fluid pump, cold side of the low-temperature regenerator, and cold side of the high-temperature regenerator before returning to the evaporator, continuing the above cycle. The high-temperature condensate at the heat medium outlet of the first-stage condensate cooler enters the second-stage evaporator through a pipeline diversion section, continuing the process of the ORC turbine power generation system.

[0023] The specific implementation process is as follows: 60t / h of steam condensate (temperature 125℃, pressure 0.25MPa) from outside the boundary enters the condensate flash tank for collection. After being pressurized to 0.6MPa by the condensate transfer pump, it enters the condensate cooler and is cooled to 80℃. The resulting high-temperature condensate is sent to the second-stage condensate cooler and cooled to 50℃. The resulting low-temperature condensate is reused outside the boundary. The circulating working fluid from the first-stage evaporator has a flow rate of 4500kg / h (temperature 120℃, pressure 1.0MPa). After passing through the separator, it enters the turbine generator to generate 38kW of electricity. After the pressure is reduced to 0.15MPa, it passes through the mixer and is mixed with a low-concentration circulating working fluid. After passing through the low-temperature regenerator and condenser and being cooled to 60℃, it is pressurized to 1.0MPa by the circulating working fluid pump. After passing through the low-temperature regenerator and high-temperature regenerator, the temperature is raised to 95℃ and it enters the evaporator, where the above cycle process is repeated. The circulating working fluid from the secondary evaporator has a flow rate of 3500 kg / h (temperature 90℃, pressure 1.0 MPa). After passing through the separator, it enters the turbine generator to generate 26 kW of electrical energy. After the pressure is reduced to 0.15 MPa, it passes through the mixer and is mixed with a low-concentration circulating working fluid. After passing through the low-temperature regenerator and condenser and being cooled to 40℃, it is pressurized to 0.8 MPa by the circulating working fluid pump. After passing through the low-temperature regenerator and high-temperature regenerator, the temperature is raised to 70℃ and then enters the evaporator, where the above cycle process continues to repeat.

[0024] The ORC turbine power generation device designed in this invention can effectively recover and utilize the heat in low-temperature steam condensate for by-product power generation, reducing the consumption of circulating water in the production unit and improving the operating efficiency of the unit.

[0025] The embodiments and descriptions above are merely illustrative of the principles of this invention and do not limit the scope of protection of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. Parts not covered in this invention are identical to or can be implemented using existing technology.

Claims

1. A condensate recovery ORC turbine power generation device, characterized in that: The device includes a condensate flash tank (1), a first condensate cooler (3-1), and a second condensate cooler (3-2). The condensate from the outside is connected to the first condensate cooler (3-1). The cold side output end of the first condensate cooler (3-1) is connected to the first condensate cooler (3-1) through a first-stage evaporator (401). The working fluid output end of the first-stage evaporator (401) is connected to the first separator (402) in sequence. The gas output end of the first separator (402) is connected to the first turbine generator (403) and the first mixer (405) in sequence. The liquid output of the first separator (402) is connected to the first mixer (405) through the first high-temperature regenerator (404). The first mixer (405) is connected to the first low-temperature regenerator (406), the first condenser (407), the first liquid storage tank (408), the first circulating working fluid pump (409) and the first low-temperature regenerator (406) in sequence. The cold side output end of the first low-temperature regenerator (406) is connected to the first-stage evaporator (401) in sequence through the first high-temperature regenerator (404).

2. The condensate recovery ORC turbine power generation device according to claim 1, characterized in that: The hot side output end of the first condensate cooler (3-1) is connected to the second condensate cooler (3-2), and the cold side output end of the second condensate cooler (3-2) is connected to the second condensate cooler (3-2) through the second evaporator (501). The working fluid output end of the second evaporator (501) is connected to the second separator (502) in sequence. The gas output end of the second separator (502) is connected to the second turbine generator (503) and the second mixer (505) in sequence. The liquid output of the second separator (502) is connected to the second mixer (505) through the second high-temperature regenerator (504). The second mixer (505) is connected to the second low-temperature regenerator (506), the second condenser (507), the second liquid storage tank (508), the second circulating working fluid pump (509) and the second low-temperature regenerator (506) in sequence. The cold side output end of the second low-temperature regenerator (506) is connected to the second evaporator (501) in sequence through the second high-temperature regenerator (504).

3. The condensate recovery ORC turbine power generation device according to claim 2, characterized in that: The pipes connecting the first condensate cooler (3-1) and the second condensate cooler (3-2) are equipped with a pipe splitter. One output goes outside the boundary, and the high-temperature condensate output of the other output is connected to the second condensate cooler (3-2). The low-temperature condensate of the second condensate cooler (3-2) is output outside the boundary.

4. The condensate recovery ORC turbine power generation device according to claim 1, characterized in that: The outlet end of the condensate flash tank (1) is connected to the inlet of the condensate transfer pump (2), and the outlet pipe of the condensate transfer pump (2) is connected to the hot side input end of the first condensate cooler (3-1). A portion of the high-temperature condensate at the hot side output end of the first condensate cooler (3-1) is connected to the hot side input end of the second condensate cooler (3-2), and the low-temperature condensate pipe at the hot side output end of the second condensate cooler (3-2) is sent to the outside.

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