Utilization and treatment device for waste heat boiler starting flushing water of IGCC (integrated gasification combined cycle) unit

Abstract

The invention discloses an IGCC (integrated gasification combined cycle) unit waste heat boiler starting flushing water utilization and treatment device in the technical field of power generation. A first water inlet connector is arranged at one end of the water storage tank, a water drainage port is arranged at the other end of the water storage tank, the first water inlet connector is connected with the waste water pipe, the water drainage port is connected with an IG tower through a pipeline, a water treatment barrel is arranged between the waste water pipe and the first water inlet connector, and the water treatment barrel is connected with the IG tower through a pipeline. According to the IGCC unit waste heat boiler start-up flushing water utilization and treatment device, the water storage tank is additionally arranged at a power island industrial wastewater pipe, waste heat boiler flushing water is discharged into the water storage tank, and after a certain liquid level exists in the water storage tank, the waste heat boiler flushing water is conveyed to an IG tower through a pump; the waste heat boiler flushing water is recycled, water resources are saved, and tap water consumption of the IG tower is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of power generation, and in particular to a startup flushing water utilization and treatment device for a waste heat boiler of an IGCC unit. Background Art

[0002] IGCC, or integrated coal gasification combined cycle power generation system, is an advanced power system that combines coal gasification technology with efficient combined cycle. IGCC consists of two parts, namely the coal gasification and purification part and the gas-steam combined cycle power generation part. The main equipment of the first part includes gasifier, air separation unit, gas purification equipment (including sulfur recovery device); the main equipment of the second part includes gas turbine power generation system, waste heat boiler, steam turbine power generation system. The process of IGCC is as follows: coal is gasified into medium and low calorific value coal gas, which is purified to remove pollutants such as sulfide, nitride, dust, etc. in the coal gas and becomes clean gas fuel, which is then sent to the combustion chamber of the gas turbine for combustion, heating the gas working medium to drive the gas turbine to work, and the gas turbine exhaust enters the waste heat boiler to heat the feed water, generating superheated steam to drive the steam turbine to work.

[0003] During the flushing stage before the start-up of the waste heat boiler, the waste heat boiler water is directly discharged into the fixed drainage tank, and a large amount of flushing water flows directly into the industrial wastewater main. The waste heat boiler water flows directly into the industrial wastewater pipe, wasting a large amount of flushing water and causing a waste of water resources. Summary of the invention

[0004] The purpose of the present invention is to provide a IGCC unit waste heat boiler startup flushing water utilization and treatment device to solve the problem proposed in the above background technology that during the flushing stage before the waste heat boiler is started, the waste heat boiler drainage is directly discharged into a fixed drainage tank, a large amount of flushing water directly flows into the industrial wastewater main pipe, and the waste heat boiler drainage directly flows into the industrial wastewater pipe, wasting a large amount of flushing water and causing a waste of water resources.

[0005] To achieve the above object, the present invention provides the following technical solution: an IGCC unit waste heat boiler startup flushing water utilization and treatment device, comprising:

[0006] Wastewater pipes;

[0007] A water reservoir, wherein a first water inlet interface is provided at one end of the water reservoir, and a drainage port is provided at the other end of the water reservoir, wherein the first water inlet interface is connected to the wastewater pipe, and the drainage port is connected to the IG tower through a pipeline.

[0008] Preferably, a water treatment barrel is provided between the wastewater pipe and the first water inlet interface, a second water inlet interface is provided on the circumferential outer wall of the water treatment barrel, and the second water inlet interface is connected to the wastewater pipe.

[0009] Preferably, a vacuum interface is provided on the circumferential outer wall of the water treatment barrel, and a drainage pipe is provided on the circumferential outer wall of the vacuum interface.

[0010] Preferably, an end cover is provided on the top of the water treatment barrel.

[0011] Preferably, a guide groove is spirally provided on the inner cavity side wall of the water treatment barrel, the guide groove is connected with the inner cavity of the vacuum interface, and a filter adsorption plate is provided on the inner side wall of the guide groove.

[0012] Preferably, a connecting pipe is provided at the end of the drainage pipe, and the connecting pipe is connected to the first water inlet interface.

[0013] Preferably, a dosing barrel is provided on the circumferential outer wall of the connecting pipe near one end of the first water inlet interface.

[0014] Preferably, a driving mechanism is provided on the top of the dosing barrel, and the driving mechanism includes a motor, a rotating shaft and a spiral blade. The motor is provided on the top of the dosing barrel, the rotating shaft is provided on the output shaft of the motor, the rotating shaft is provided in the inner cavity of the dosing barrel, the spiral blade is provided on the circumferential outer side wall of the rotating shaft, and the spiral blade is provided in the inner cavity of the dosing barrel.

[0015] Preferably, the inner cavity of the water reservoir is provided with a partition, and a water pump is provided on the partition.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the IGCC unit waste heat boiler startup flushing water utilization and treatment device adds a water reservoir at the power island industrial wastewater pipe, discharges the waste heat boiler flushing water into the water reservoir, and after a certain liquid level in the water reservoir is reached, it is pumped to the IG tower, so that the waste heat boiler flushing water is recycled, saving water resources and reducing the tap water consumption of the IG tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the installation of the water storage tank, water treatment barrel and connecting pipes of the present invention;

[0019] Figure 3 This is a schematic diagram of the installation of the water treatment barrel and the diversion trough of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the driving mechanism of the present invention;

[0021] Figure 5 It is a schematic cross-sectional view of a water reservoir of the present invention.

[0022] In the figure: 100 wastewater pipe, 200 water reservoir, 201 first water inlet interface, 202 drainage port, 203 partition, 300 water treatment barrel, 301 second water inlet interface, 310 vacuum interface, 311 drainage pipe, 320 end cover, 330 guide groove, 400 connecting pipe, 500 dosing barrel, 510 driving mechanism, 511 motor, 512 rotating shaft, 513 spiral blade. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides a device for utilizing and treating the startup flushing water of the waste heat boiler of an IGCC unit. By adding a water reservoir at the industrial wastewater pipe of the power island, the flushing water of the waste heat boiler is discharged into the water reservoir. When the liquid level in the water reservoir reaches a certain level, it is pumped to the IG tower to recycle the flushing water of the waste heat boiler, thereby saving water resources and reducing the tap water consumption of the IG tower. Please refer to Figure 1 , including: a waste water pipe 100 and a water reservoir 200;

[0025] See also Figure 1A first water inlet interface 201 is provided at the end of the water reservoir 200, and a drainage port 202 is provided at the other end of the water reservoir 200. The first water inlet interface 201 is connected to the waste water pipe 100, and the drainage port 202 is connected to the IG tower through a pipeline. One end of the waste water pipe 100 is connected to the industrial waste water pipe of the power island through a flange. The first water inlet interface 201 is integrally formed at the bottom of the side wall of the water reservoir 200, and the inner cavity of the first water inlet interface 201 is connected to the inner cavity of the water reservoir 200. The waste water pipe 100 The end of the drain port 202 away from the waste water pipe is connected to the end of the first water inlet interface 201 away from the water reservoir 200 through a flange, the drain port 202 is integrally formed on the bottom of the side of the water reservoir 200 away from the first water inlet interface 201, the inner cavity of the drain port 202 is connected with the inner cavity of the water reservoir 200, the end of the drain port 202 away from the water reservoir 200 is connected to the IG tower through a pipeline, a drain pump is provided between the drain port 202 and the IG tower, and a liquid level sensor is provided in the inner cavity of the water reservoir 200. A controller is provided on the outer wall of the water tank 200. The controller is a PLC controller. The controller is electrically connected to the drainage pump through a relay. The liquid level sensor is electrically connected to the controller. When in use, the upper and lower limits of the liquid level are first set through the controller. The flushing water of the waste heat boiler is discharged into the industrial waste water pipe of the power island. The flushing water enters the inner cavity of the water tank 200 through the waste water pipe 100 and the first water inlet interface 201. The flushing water is accumulated in the water tank 200. When the inner cavity of the water tank 200 is When the liquid level reaches the upper limit of the set liquid level, the controller controls the relay to connect the power of the drainage pump. The drainage pump is powered on to pump the flushing water accumulated in the inner cavity of the water storage tank 200 into the IG tower, and the flushing water of the waste heat boiler is recycled, saving water resources and reducing the tap water consumption of the IG tower. When the liquid level in the inner cavity 20 drops to the lower limit of the liquid level, the controller controls the relay to disconnect the power of the drainage pump, and the drainage pump stops working and accumulates the flushing water until the next cycle.

[0026] See also Figure 1-3A water treatment barrel 300 is arranged between the wastewater pipe 100 and the first water inlet interface 201, a second water inlet interface 301 is arranged on the circumferential outer wall of the water treatment barrel 300, and the second water inlet interface 301 is connected to the wastewater pipe 100, a vacuum interface 310 is arranged on the circumferential outer wall of the water treatment barrel 300, a drainage pipe 311 is arranged on the circumferential outer wall of the vacuum interface 310, an end cover 320 is arranged on the top of the water treatment barrel 300, a guide groove 330 is spirally arranged on the side wall of the inner cavity of the water treatment barrel 300, the guide groove 330 is connected with the inner cavity of the vacuum interface 310, and a filter adsorption plate is arranged on the inner wall of the guide groove 330. In order to clean up impurities in the water and purify the water quality, the present invention also provides a water treatment barrel 300, a second water inlet interface 301, and a second water inlet interface 301 is connected to the wastewater pipe 100. The water inlet interface 301 is integrally formed at the bottom of the circumferential outer wall of the water treatment barrel 300, the inner cavity of the second water inlet interface 301 is connected with the inner cavity of the water treatment barrel 300, and the end of the second water inlet interface 301 away from the water treatment barrel 300 is connected to the end of the waste water pipe 100 away from the waste water pipe through a flange. The vacuum interface 310 is integrally formed at the top of the circumferential outer wall of the water treatment barrel 300, and the inner cavity of the vacuum interface 310 is connected with the inner cavity of the water treatment barrel 300. A vacuum pump is installed at the end of the vacuum interface 310 away from the water treatment barrel 300, and a diaphragm is arranged between the vacuum pump and the vacuum interface 310. The diaphragm can be waterproof but cannot isolate air. The inner cavity of the water treatment barrel 300 is evacuated by the vacuum pump, and the drainage pipe 311 is connected. The water treatment tank 300 is integrally formed at the bottom of the circumferential outer wall of the vacuum port 310, the inner cavity of the drainage pipe 311 is connected with the inner cavity of the vacuum port 310, and the end cover 320 is detachably installed at the top opening of the water treatment tank 300 by bolts. The end cover 320 and the water treatment tank 300 are sealed. The end cover 320 can be removed from the water treatment tank 300 to enter the inner cavity of the water treatment tank 300 and clean the inner cavity of the water treatment tank 300. The guide groove 330 is spirally integrated in the inner cavity of the water treatment tank 300, and the filter adsorption plate is detachably laid on the inner bottom surface of the guide groove 330. When the filter adsorption plate is full of adsorption and cannot adsorb and filter impurities in the water, the filter adsorption plate can be taken out from the inner side of the guide groove 330 for cleaning. , for repeated use, the filter adsorption plate is activated carbon, the inner cavity of the guide groove 330 is connected with the inner cavity of the vacuum interface 310, and in specific use, the flushing water is guided to the inner cavity of the water treatment barrel 300 through the second water inlet interface 301, and the top of the inner cavity of the water treatment barrel 300 is vacuumed by the vacuum pump, so that a negative pressure is formed on the top of the inner cavity of the water treatment barrel 300, and the flushing water entering the inner cavity of the water treatment barrel 300 through the second water inlet interface 301 is accumulated at the bottom of the inner cavity of the water treatment barrel 300. Driven by the external water pressure, the flushing water will spirally rise along the guide groove 330. During the spiral rising process of the flushing water, the impurities in the water are filtered and adsorbed by the filter adsorption plate, and the water with impurities removed enters the inner cavity of the vacuum interface 310 through the guide groove 330.The water entering the inner cavity of the vacuum port 310 enters the inner cavity of the drainage pipe 311 under the action of gravity and is discharged through the drainage pipe 311;

[0027] See also Figure 1-2 and Figure 4-5A connecting pipe 400 is provided at the end of the drainage pipe 311, and the connecting pipe 400 is connected to the first water inlet interface 201. A dosing barrel 500 is provided on the circumferential outer wall of the connecting pipe 400 near one end of the first water inlet interface 201. A driving mechanism 510 is provided on the top of the dosing barrel 500. The driving mechanism 510 includes a motor 511, a rotating shaft 512 and a spiral blade 513. The motor 511 is arranged on the top of the dosing barrel 500, the rotating shaft 512 is arranged on the output shaft of the motor 511, the rotating shaft 512 is arranged in the inner cavity of the dosing barrel 500, the spiral blade 513 is arranged on the circumferential outer wall of the rotating shaft 512, the spiral blade 513 is arranged in the inner cavity of the dosing barrel 500, and the inner cavity of the water reservoir 200 is provided with a partition 203, and the partition 203 A water pump is provided, one end of the connecting pipe 400 is installed on the drainage pipe 311 through a flange at the end away from the vacuum interface 310, the inner cavity of the connecting pipe 400 is connected with the inner cavity of the drainage pipe 311, the end of the connecting pipe 400 away from the drainage pipe 311 is connected to the end of the first water inlet interface 201 away from the water reservoir 200 through a flange, the connecting pipe 400 is connected with the inner cavity of the water reservoir 200 through the first water inlet interface 201, a connecting port is integrally formed on the end of the circumferential outer wall of the connecting pipe 400 adjacent to the first water inlet interface 201, the connecting port is connected with the inner cavity of the connecting pipe 400, the dosing barrel 500 is installed on the end of the connecting port away from the connecting pipe 400 through a flange, the inner cavity of the dosing barrel 500 The inner cavity of the connecting pipe 400 is connected through the connecting port, and the flocculant is put into the inner cavity of the dosing barrel 500. The motor 511 is detachably installed on the top of the dosing barrel 500 by bolts. The rotating shaft 512 is installed on the output shaft of the motor 511 by spline or flat key connection. The spiral blade 513 is welded on the circumferential outer wall of the rotating shaft 512. The rotating shaft 512 is set in the inner cavity of the dosing barrel 500 and the inner cavity of the spiral blade 513. The outer wall of the spiral blade 513 is tangent to the inner wall of the discharge port on the dosing barrel 500. The spiral blade 513 and the discharge port on the dosing barrel 500 are actively sealed. When the spiral blade 513 is in a stationary state, the discharge port of the dosing barrel 500 is sealed. When the spiral blade 513 is in a working state, the discharge port of the dosing barrel 500 is sealed. The flocculant can be discharged into the inner cavity of the connecting pipe 400. The flocculant can be discharged into the inner cavity of the connecting pipe 400 by the rotation of the spiral blade 513. The partition 203 is integrally formed in the inner cavity of the water reservoir 200. The inner cavity of the water reservoir 200 is divided into two spaces by the partition 203. The space adjacent to the first water inlet interface 201 is the flocculation sedimentation area, and the space adjacent to the drainage port 202 is the accumulation area. The water pump is detachably mounted on the partition 203 by bolts. The water inlet end of the water pump is connected to the space adjacent to the first water inlet interface 201 through a pipeline, and the drainage end of the water pump is connected to the space adjacent to the drainage port 202 through a pipeline. When it is used, the water with some impurities removed enters the inner cavity of the connecting pipe 400 through the drainage pipe 311.The motor 511 drives the rotating shaft 512 to rotate, and the rotating shaft 512 drives the spiral blade 513 to rotate. The spiral blade 513 discharges the flocculant into the inner cavity of the connecting pipe 400, and the flocculant is flushed into the inner cavity of the water storage tank 200 near the first water inlet interface 201 by the water flow. The flushing water flocculates and settles in the space near the first water inlet interface 201. The supernatant in the space near the first water inlet interface 201 is extracted by the water pump, and the water after flocculation and sedimentation is extracted into the space near the drainage port 202. The clean water is continued. The liquid level sensor is installed in the space near the drainage port 202. When the accumulated water reaches a certain liquid level, it is extracted into the IG tower through the drainage pump.

[0028] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An IGCC unit waste heat boiler startup flushing water utilization and treatment device, characterized in that: include: Wastewater pipe (100); A water reservoir (200), wherein a first water inlet interface (201) is provided at one end of the water reservoir (200), and a drainage port (202) is provided at the other end of the water reservoir (200), wherein the first water inlet interface (201) is connected to the wastewater pipe (100), and the drainage port (202) is connected to the IG tower via a pipeline.

2. The IGCC unit waste heat boiler startup flushing water utilization and treatment device according to claim 1, characterized in that: A water treatment barrel (300) is arranged between the wastewater pipe (100) and the first water inlet interface (201), and a second water inlet interface (301) is arranged on the circumferential outer wall of the water treatment barrel (300), and the second water inlet interface (301) is connected to the wastewater pipe (100).

3. The IGCC unit waste heat boiler startup flushing water utilization and treatment device according to claim 2, characterized in that: A vacuum port (310) is provided on the circumferential outer wall of the water treatment barrel (300), and a drainage pipe (311) is provided on the circumferential outer wall of the vacuum port (310).

4. The IGCC unit waste heat boiler startup flushing water utilization and treatment device according to claim 3, characterized in that: An end cover (320) is provided on the top of the water treatment barrel (300).

5. The IGCC unit waste heat boiler startup flushing water utilization and treatment device according to claim 4, characterized in that: A guide groove (330) is spirally arranged on the inner cavity side wall of the water treatment barrel (300), the guide groove (330) is connected to the inner cavity of the vacuum port (310), and a filter adsorption plate is arranged on the inner side wall of the guide groove (330).

6. The IGCC unit waste heat boiler startup flushing water utilization and treatment device according to claim 5, characterized in that: A connecting pipe (400) is provided at the end of the drainage pipe (311), and the connecting pipe (400) is connected to the first water inlet interface (201).

7. The IGCC unit waste heat boiler startup flushing water utilization and treatment device according to claim 6, characterized in that: A medicine adding barrel (500) is provided on the circumferential outer wall of the connecting pipe (400) adjacent to one end of the first water inlet interface (201).

8. The IGCC unit waste heat boiler startup flushing water utilization and treatment device according to claim 7, characterized in that: A driving mechanism (510) is arranged on the top of the dosing barrel (500), and the driving mechanism (510) includes a motor (511), a rotating shaft (512) and a spiral blade (513). The motor (511) is arranged on the top of the dosing barrel (500), the rotating shaft (512) is arranged on the output shaft of the motor (511), the rotating shaft (512) is arranged in the inner cavity of the dosing barrel (500), the spiral blade (513) is arranged on the circumferential outer wall of the rotating shaft (512), and the spiral blade (513) is arranged in the inner cavity of the dosing barrel (500).

9. The IGCC unit waste heat boiler startup flushing water utilization and treatment device according to claim 8, characterized in that: The inner cavity of the water reservoir (200) is provided with a partition (203), and a water pump is provided on the partition (203).

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