Recovery control system for periodic blowdown of boiler

Abstract

The utility model discloses a boiler periodic blowdown recovery control system, which relates to the technical field of boiler application, and comprises a boiler main body and a collecting pool, the collecting pool is arranged on one side of the boiler main body, a periodic blowdown tank is arranged between the boiler main body and the collecting pool, a recovery water tank is arranged on one side of the collecting pool, and the recovery water tank is connected with the boiler main body. A water outlet of the collecting pool is communicated with a lifting pump, a water outlet of the lifting pump is communicated with a recycling water tank, a recycling water pump is arranged on one side of the recycling water tank, an external circulating water-to-closed cooling tower is arranged on one side of the recycling water tank, a water inlet of the recycling water pump is communicated with the external circulating water-to-closed cooling tower, and a water outlet of the recycling water pump is communicated with the external circulating water-to-closed cooling tower. A water outlet of the recycling water pump is communicated with the recycling water tank; and a filter screen cover is fixedly arranged at an air inlet of the lifting pump. The device effectively solves the problem of water resource waste caused by long exhaust steam discharge from boiler blow-off to the top of the fixed discharge tank and regular blow-off, and achieves the purposes of energy conservation and emission reduction.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler application, in particular to a boiler periodic sewage discharge recovery control system. Background Art

[0002] Gas hot water boilers need to be regularly discharged to remove boiler water with high salt concentration, as well as corrosive substances and sediments in the boiler water, so that the salt content of the boiler water is maintained within the specified range, so as to reduce the expansion of the boiler water and the appearance of a foam layer, thereby reducing the steam humidity and salt content, and ensuring good steam quality. At the same time, discharge can also eliminate or reduce scaling in the evaporation heating surface tube. However, long-term boiler discharge will cause exhaust steam pollution and waste of water resources. Utility Model Content

[0003] In view of the problems existing in the above-mentioned existing boiler periodic sewage recovery control system, the present utility model is proposed.

[0004] Therefore, the purpose of the utility model is to provide a boiler regular sewage discharge recovery control system, which solves the problem of water resource waste caused by regular boiler sewage discharge in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A boiler periodic wastewater recovery control system comprises a boiler body and a collection tank, wherein the collection tank is arranged at one side of the boiler body, a fixed discharge tank is arranged between the boiler body and the collection tank, a recovery water tank is arranged at one side of the collection tank, a water outlet of the collection tank is connected with a lifting pump, a water outlet of the lifting pump is connected with the recovery water tank, a recovery water pump is arranged at one side of the recovery water tank, an external circulation water to a closed cooling tower is arranged at one side of the recovery water tank, a water outlet of the recovery water pump is connected with the external circulation water to the closed cooling tower, and a water inlet of the recovery water pump is connected with the recovery water tank;

[0007] The air inlet of the lift pump is fixedly provided with a filter screen cover, the outer sliding sleeve of the filter screen cover is provided with a scraper ring, and one side of the lift pump is provided with a transmission mechanism for driving the scraper ring to move back and forth.

[0008] Preferably, the transmission mechanism includes a turntable and a movable ring, a turn rod is rotatably arranged inside the lifting pump and on the side close to the water inlet, an impeller is fixedly sleeved on the rod wall of the turn rod, one end of the turn rod extends to the outside of the lifting pump, the turntable is fixedly sleeved on the outer end of the turn rod, vertical plates are arranged on both sides of the lifting pump, the two vertical plates are fixedly connected to the fixed ring through a connecting rod, the movable ring is fixedly arranged on the upper ends of the two vertical plates, a round pin is eccentrically arranged on the surface of the turntable, and one end of the round pin extends to the outside of the movable ring.

[0009] Preferably, a retaining ring is fixedly sleeved on one end of the movable ring away from the rotating disk, and the retaining ring is in conflict with a side of the movable ring away from the rotating disk.

[0010] Preferably, a control valve is provided between the recovery water pump and the external circulating water to the closed cooling tower.

[0011] Preferably, the scraper ring is a rubber ring.

[0012] Preferably, the surface of the filter screen cover is coated with epoxy zinc-rich primer.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] 1. The utility model effectively solves the current situation of direct discharge of exhaust steam from the boiler fixed discharge tank by adding a cooling water pipeline to the boiler fixed discharge tank, thereby achieving the purpose of recycling.

[0015] 2. The utility model, through a system consisting of a collection tank, a lifting pump, a recovery water tank, a recovery water pump and a control valve, effectively solves the current situation of direct discharge of boiler sewage, and achieves the purpose of recycling and reuse, energy saving and emission reduction.

[0016] 3. In the utility model, when the lifting pump is pumping water, the filter screen filters impurities in the water to prevent the lifting pump from being blocked as much as possible. At the same time, the water pump pushes the impeller to rotate, so that the rotating rod drives the turntable to rotate, and the round pin rotates with the rotating rod as the axis. During the rotation of the round pin, the movable ring will be pushed and pulled back and forth, so that the vertical plate drives the connecting rod to move, and the connecting rod drives the scraper ring to move back and forth, that is, the surface of the filter screen can be scraped and cleaned to prevent the filter screen from being blocked as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the structure of a boiler periodic sewage recovery control system proposed by the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the recovery pump;

[0020] Figure 3 for Figure 2 Schematic diagram of the internal structure.

[0021] Description of reference numerals:

[0022] 1. Fixed-discharge tank; 2. Collection tank; 3. Lifting pump; 4. Recovery water tank; 5. Control valve; 6. Recovery water pump; 7. External circulation water to closed cooling tower; 8. Boiler body; 9. Filter screen; 10. Scraper ring; 11. Vertical plate; 12. Connecting rod; 13. Movable ring; 14. Rotating rod; 15. Turntable; 16. Round pin; 17. Impeller. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] The utility model embodiment discloses a boiler periodic sewage discharge recovery control system.

[0025] Reference Figure 1-3 A boiler periodic sewage recovery control system comprises a boiler body 8 and a collection tank 2, the collection tank 2 is arranged on one side of the boiler body 8, a fixed-discharge tank top spray system 1 is arranged between the boiler body 8 and the collection tank 2, a recovery water tank 4 is arranged on one side of the collection tank 2, a water outlet of the collection tank 2 is connected with a lifting pump 3, the water outlet of the lifting pump 3 is connected with the recovery water tank 4, a recovery water pump 6 is arranged on one side of the recovery water tank 4, an external circulation water to closed cooling tower 7 is arranged on one side of the recovery water tank 4, the water outlet of the recovery water pump 6 is connected with the external circulation water to closed cooling tower 7, the water inlet of the recovery water pump 6 is connected with the recovery water tank 4, a control valve 5 is arranged between the recovery water pump 6 and the external circulation water to closed cooling tower 7, so as to facilitate the control of the recovery water pump 6;

[0026] A filter screen cover 9 is fixedly provided at the air inlet of the lift pump 3 , and a scraper ring 10 is provided on the outer sliding sleeve of the filter screen cover 9 .

[0027] Reference Figure 1-3 A transmission mechanism for driving the scraper ring 10 to move back and forth is arranged on one side of the lift pump 3. The transmission mechanism includes a rotating disk 15 and a movable ring 13. A rotating rod 14 is rotatably arranged inside the lift pump 3 and located on one side close to the water inlet. An impeller 17 is fixedly sleeved on the rod wall of the rotating rod 14. One end of the rotating rod 14 extends to the outside of the lift pump 3. The rotating disk 15 is fixedly sleeved on the outer end of the rotating rod 14. Vertical plates 11 are arranged on both sides of the lift pump 3. The two vertical plates 11 are connected to the fixed The rings are fixedly connected, and the movable ring 13 is fixedly arranged at the upper ends of the two vertical plates 11. A round pin 16 is eccentrically arranged on the surface of the turntable 15, and one end of the round pin 16 extends to the outside of the movable ring 13. A retaining ring is fixedly sleeved on the end of the movable ring 13 away from the turntable 15, and the retaining ring is in conflict with the side of the movable ring 13 away from the turntable 15. The scraper ring 10 is a rubber ring to prevent scratches on the filter screen cover 9 as much as possible. The surface of the filter screen cover 9 is coated with epoxy zinc-rich primer to improve the corrosion resistance of the filter screen cover 9.

[0028] In the utility model, when in use, the power station fixed discharge condensate is recovered, and the external circulating cooling water is used to spray the fixed discharge tank top spray system 1 to absorb the external low-pressure exhaust steam and the high-temperature hot water of the boiler fixed discharge to cool down. The condensate that absorbs the heat returns to the fixed discharge tank. When the water level reaches the set high water level, the control valve is opened to discharge it to the collection pool 2. After cooling and sedimentation, it is collected by the lifting pump 3 to the recovery water tank 4. The flow, pressure and liquid level of the condensate are adjusted by controlling the regulating valve 5. According to the control signal of the system, the opening of the regulating valve is automatically controlled to achieve the regulation and control of the medium flow, pressure and liquid level. The recovered water in the recovery water tank 4 is pumped to the external circulating water through the recovery water pump 6 to the closed cooling tower for recovery.

[0029] The control valve adjustment 5 is used to adjust the flow, pressure and liquid level of the medium. According to the control signal of the system, the opening of the regulating valve is automatically controlled to achieve the regulation and control of the medium flow, pressure and liquid level. The liquid level of the fixed discharge tank is controlled by the liquid level control regulating valve, and the liquid level is controlled at 50%, and is recovered to the circulating hot water pipeline through the condensate pump.

[0030] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A boiler periodic wastewater recovery control system, comprising a boiler body (8) and a collection tank (2), characterized in that: The collecting pool (2) is arranged on one side of the boiler body (8); a fixed-row tank top spray system (1) is arranged between the boiler body (8) and the collecting pool (2); a recovery water tank (4) is arranged on one side of the collecting pool (2); a water outlet of the collecting pool (2) is connected to a lifting pump (3); a water outlet of the lifting pump (3) is connected to the recovery water tank (4); a recovery water pump (6) is arranged on one side of the recovery water tank (4); an external circulating water to a closed cooling tower (7) is arranged on one side of the recovery water tank (4); a water outlet of the recovery water pump (6) is connected to the external circulating water to a closed cooling tower (7); and a water inlet of the recovery water pump (6) is connected to the recovery water tank (4); A filter screen cover (9) is fixedly provided at the air inlet of the lift pump (3), a scraper ring (10) is provided on the outer sliding sleeve of the filter screen cover (9), and a transmission mechanism for driving the scraper ring (10) to reciprocate is provided on one side of the lift pump (3).

2. The boiler periodic wastewater recovery control system according to claim 1 is characterized in that: The transmission mechanism comprises a rotating disk (15) and a movable ring (13); a rotating rod (14) is rotatably arranged inside the lift pump (3) and located on a side close to the water inlet; an impeller (17) is fixedly sleeved on the rod wall of the rotating rod (14); one end of the rotating rod (14) extends to the outside of the lift pump (3); the rotating disk (15) is fixedly sleeved on the outer end of the rotating rod (14); vertical plates (11) are arranged on both sides of the lift pump (3); the two vertical plates (11) are fixedly connected to the fixed ring through a connecting rod (12); the movable ring (13) is fixedly arranged on the upper ends of the two vertical plates (11); a round pin (16) is eccentrically arranged on the surface of the rotating disk (15); one end of the round pin (16) extends to the outside of the movable ring (13).

3. The boiler periodic wastewater recovery control system according to claim 2 is characterized in that: A retaining ring is fixedly sleeved on one end of the movable ring (13) away from the rotating disk (15), and the retaining ring abuts against a side of the movable ring (13) away from the rotating disk (15).

4. The boiler periodic wastewater recovery control system according to claim 1 is characterized in that: A control valve (5) is provided between the recovery water pump (6) and the external circulating water to the closed cooling tower (7).

5. The boiler periodic wastewater recovery control system according to claim 2 is characterized in that: The scraper ring (10) is a rubber ring.

6. The boiler periodic wastewater recovery control system according to claim 2 is characterized in that: The surface of the filter screen cover (9) is coated with epoxy zinc-rich primer.

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