Wall sticking prevention device of spray drying tower for zero discharge of waste water in thermal power plant

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By designing anti-adhesive wall devices with components such as blowing rings and reinforcement mechanisms in the spray drying tower for zero-discharge of wastewater in the thermal power plant, the problem of poor anti-adhesive wall effects in the prior art is solved, and efficient wastewater zero discharge and energy-saving effects are achieved.

CN223016559UActive Publication Date: 2025-06-24SHANDONG GRUNNEZEM ENVIRONMENTAL PROTECTION TECH CO LTD

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Patent Information

Application Number: CN202421913099.X
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-08-08
Publication Date: 2025-06-24
Estimated Expiration: 2034-08-08

AI Technical Summary

Technical Problem

The prior art has poor anti-adhesion wall effect in spray drying towers for zero drainage of wastewater in thermal power plants, and the equipment is complex, making it difficult to adapt to the characteristics of high-temperature flue gas drying.

Method used

An anti-adhesive wall device including a blowing ring, a reinforcement mechanism, a fixing mechanism and a connecting mechanism is designed. Hot air is uniformly sprayed through the blowing ring to form an isolation area with air pressure to prevent wastewater droplets and salt from approaching the inner wall of the tower.

Benefits of technology

It effectively avoids the phenomenon of material sticking to the wall, simplifies the device structure, reduces energy consumption, and has a significant anti-adhesion wall effect, which is suitable for high-temperature flue gas drying.

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Abstract

The utility model provides an anti-wall-sticking device of a spray drying tower for zero discharge of waste water in a thermal power plant, which comprises a tower body, a blowing ring is arranged in an inner cavity of the tower body, a reinforcing mechanism and a connecting mechanism are respectively arranged on the outer side of the blowing ring, a fixing mechanism is arranged on one side of the reinforcing mechanism, and the connecting mechanism is arranged on the other side of the reinforcing mechanism. An external pipe is arranged on one side of the connecting mechanism, one end of the external pipe penetrates through the inner wall of the tower body, the reinforcing mechanism comprises a reinforcing plate, and the reinforcing plate is fixedly connected to the outer side of the blowing ring. The anti-wall-sticking device of the spray drying tower for zero discharge of waste water in the thermal power plant solves the problems that in the prior art, the spray drying tower for drying high-temperature flue gas of waste water is not suitable, the characteristic that a drying heat source is boiler flue gas is not fully considered, and in the prior art, the device is complex, the anti-wall-sticking effect is poor, and the cost is high. And the anti-wall-sticking problem of the spray drying tower for drying the high-temperature flue gas of the waste water is solved.

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Description

Technical Field

[0001] The utility model relates to the technical field of thermal power generation, in particular to an anti-sticking wall device for a spray drying tower used in zero discharge of waste water in a thermal power plant. Background Technique

[0002] The principle of the bypass flue gas evaporation process adopted in the zero discharge route of waste water in a thermal power plant: the waste water forms fine droplets in the spray drying tower through a spray device in the tower, and a path of high-temperature flue gas is introduced from the main flue in front of the air preheater of the boiler into the spray drying tower. The high-temperature flue gas is used to evaporate the waste water droplets, so that the moisture in the droplets quickly volatilizes, and the salts in the waste water are dried and precipitated, mixed into the dust in the flue gas. The used hot flue gas then returns to the main flue behind the air preheater, and subsequently, the dust is collected by the boiler flue gas dust collector to achieve zero discharge of waste water.

[0003] In the prior art, the following treatment methods are generally used for the anti-sticking wall problem:

[0004] 1. Adopt a double-wall drying tower, which is cooled by air in the middle to keep the wall temperature below 50°C. Disadvantages: The production of the double wall is troublesome; air cooling requires additional equipment such as a fan, increasing equipment costs and project power consumption; air cooling will reduce the flue gas temperature at the outlet of the drying tower, resulting in dew point acid corrosion of the outlet flue gas, thereby corroding the subsequent flue gas treatment equipment;

[0005] 2. Install an air broom composed of a row of nozzles near the inner wall of the tower and make it slowly rotate along the tower wall. Disadvantages: It requires power, the device is complex, the failure rate is high, and it is not easy to repair; components such as the air broom track will become new dust accumulation points, easily leading to operating failures of the air broom;

[0006] 3. Add air hammers to the tower wall, and force the sticking materials to break away through the knocking of the air hammers. Disadvantages: Installed by taking points on the outer tower wall, the knocking range is limited; the main flow in the spray drying tower is gas rather than powder, and the anti-sticking wall effect is not good; compressed air needs to be used, increasing the burden on the plant air compressor.

[0007] Therefore, the prior art is not very suitable for the spray drying tower used for drying waste water with high-temperature flue gas, does not fully consider the characteristics of the drying heat source being boiler flue gas, and the prior art devices are complex and the anti-sticking wall effect is not good, making it inconvenient to solve the anti-sticking wall problem of the spray drying tower used for drying waste water with high-temperature flue gas. Content of the Utility Model

[0008] In order to solve the above technical problems, the utility model provides an anti-sticking wall device for a spray drying tower used in zero discharge of waste water in a thermal power plant, which is convenient to use.

[0009] The anti-sticking wall device of the spray drying tower for zero discharge of thermal power plant wastewater provided by the utility model comprises a tower body. A blowing ring is arranged in the inner cavity of the tower body. A strengthening mechanism and a connecting mechanism are respectively arranged on the outer side of the blowing ring. A fixing mechanism is arranged on one side of the strengthening mechanism. An external connecting pipe is arranged on one side of the connecting mechanism. One end of the external connecting pipe penetrates through the inner wall of the tower body.

[0010] In order to improve the structural stability of the device, as an anti-sticking wall device of the spray drying tower for zero discharge of thermal power plant wastewater provided by the utility model, preferably, the strengthening mechanism comprises a strengthening plate. The strengthening plate is fixedly connected to the outer side of the blowing ring. An upper strengthening ring and a lower strengthening ring are respectively fixedly connected to the top and bottom of the strengthening plate. The inner cavities of the upper strengthening ring and the lower strengthening ring are both fixedly connected to the outer side of the blowing ring.

[0011] In order to facilitate the connection with the strengthening mechanism, as an anti-sticking wall device of the spray drying tower for zero discharge of thermal power plant wastewater provided by the utility model, preferably, the fixing mechanism comprises a fixing seat. The fixing seat is fixed to the inner wall of the tower body. A first fixing block is fixedly connected to one side of the fixing seat. A second fixing block is arranged on one side of the first fixing block. A fixing bolt is arranged in the inner cavity of the first fixing block. The outer side of the fixing bolt is in threaded connection with the inner cavity of the second fixing block.

[0012] In order to improve the stability of the first fixing block and the second fixing block, as an anti-sticking wall device of the spray drying tower for zero discharge of thermal power plant wastewater provided by the utility model, preferably, a positioning block is fixedly connected to one side of the first fixing block. The outer side of the positioning block is clamped with the inner cavity of the second fixing block.

[0013] In order to facilitate the connection with the external connecting pipe, as an anti-sticking wall device of the spray drying tower for zero discharge of thermal power plant wastewater provided by the utility model, preferably, the connecting mechanism comprises a connecting sleeve. One end of the connecting sleeve is fixedly connected to the outer side of the blowing ring. A threaded sleeve is in threaded connection with the inner cavity of the connecting sleeve. A sealing washer is arranged at one end of the threaded sleeve. One end of the threaded sleeve away from the sealing washer is communicated with the external connecting pipe.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The anti-sticking wall device of the spray drying tower for zero discharge of waste water in the thermal power plant. The hot air enters the inner cavity of the blowing ring from the outer connecting pipe, and then the hot air is evenly ejected through the blowing ring. The blowing ring is evenly provided with round holes for evenly distributing the hot air. The ejected hot air forms an isolation area with air pressure on the inner wall of the tower, so that the waste water droplets and the salts precipitated by the evaporation of the droplets cannot approach the inner wall of the tower and the blowing ring, effectively avoiding the phenomenon of material sticking to the wall, and solving the problem that the existing technology is not very suitable for the spray drying tower for drying high-temperature flue gas of waste water, without fully considering the characteristics of the drying heat source being boiler flue gas, and the existing technology has a complex device and poor anti-sticking wall effect, and it is inconvenient to solve the anti-sticking wall problem of the spray drying tower for drying high-temperature flue gas of waste water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of a preferred embodiment of the anti-sticking wall device of the spray drying tower for zero discharge of waste water in the thermal power plant provided by the present invention;

[0017] Figure 2 FIG. is a top view structural sectional view of the present invention;

[0018] Figure 3 FIG. is a schematic structural diagram of the reinforcement mechanism of the present invention;

[0019] Figure 4 FIG. is a structural sectional view of the fixing mechanism of the present invention;

[0020] Figure 5 FIG. is a structural sectional view of the connecting mechanism of the present invention.

[0021] Reference numerals in the figures: 1, tower body; 2, blowing ring; 3, reinforcement mechanism; 301, reinforcement plate; 302, upper reinforcement ring; 303, lower reinforcement ring; 4, fixing mechanism; 401, fixing seat; 402, first fixing block; 403, second fixing block; 404, fixing bolt; 5, connecting mechanism; 501, connecting sleeve; 502, threaded sleeve; 503, sealing gasket; 6, outer connecting pipe; 7, positioning block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further described below with reference to the drawings and embodiments.

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , wherein Figure 1 FIG. is a schematic structural diagram of a preferred embodiment of the anti-sticking wall device of the spray drying tower for zero discharge of waste water in the thermal power plant provided by the present invention;

[0024] Figure 2 FIG. is a top view structural sectional view of the present invention; Figure 3It is a schematic structural diagram of the reinforcement mechanism of the present utility model; Figure 4 It is a structural sectional view of the fixing mechanism of the present utility model; Figure 5 It is a structural sectional view of the connecting mechanism of the present utility model. An anti-sticking wall device for a spray drying tower in zero-discharge of thermal power plant wastewater includes a tower body 1. A blowing ring 2 is arranged in the inner cavity of the tower body 1. A reinforcement mechanism 3 and a connecting mechanism 5 are respectively arranged on the outer side of the blowing ring 2. A fixing mechanism 4 is arranged on one side of the reinforcement mechanism 3. An outer connecting pipe 6 is arranged on one side of the connecting mechanism 5. One end of the outer connecting pipe 6 penetrates through the inner wall of the tower body 1.

[0025] In this embodiment: The blowing ring 2 is of a hollow structure with a cavity inside. Hot air is ejected through the air outlet holes on the inner side of the blowing ring 2. Metal parts such as the blowing ring 2 in this device can be made of Q355 low-alloy high-strength structural steel with low price, reducing the production cost.

[0026] As a technical optimization scheme of the present utility model, the reinforcement mechanism 3 includes a reinforcement plate 301. The reinforcement plate 301 is fixedly connected to the outer side of the blowing ring 2. An upper reinforcement ring 302 and a lower reinforcement ring 303 are respectively fixedly connected to the top and bottom of the reinforcement plate 301. The inner cavities of the upper reinforcement ring 302 and the lower reinforcement ring 303 are both fixedly connected to the outer side of the blowing ring 2.

[0027] In this embodiment: By respectively arranging the reinforcement plate 301, the upper reinforcement ring 302 and the lower reinforcement ring 303 on the outer side of the blowing ring 2, the structural strength of the blowing ring 2 is improved, which is convenient for use.

[0028] As a technical optimization scheme of the present utility model, the fixing mechanism 4 includes a fixing seat 401. The fixing seat 401 is fixed to the inner wall of the tower body 1. A first fixing block 402 is fixedly connected to one side of the fixing seat 401. A second fixing block 403 is arranged on one side of the first fixing block 402. A fixing bolt 404 is arranged in the inner cavity of the first fixing block 402. The outer side of the fixing bolt 404 is in threaded connection with the inner cavity of the second fixing block 403.

[0029] In this embodiment: Second fixing blocks 403 are fixedly arranged on the outer sides of the upper reinforcement ring 302 and the lower reinforcement ring 303. By fitting one side of the first fixing block 402 and the second fixing block 403, and then passing the fixing bolt 404 through the first fixing block 402 and screwing it into the threaded groove in the inner cavity of the second fixing block 403, the fixing seat 401 can be fixed to the upper reinforcement ring 302 and the lower reinforcement ring 303, thus completing the connection and fixation of the blowing ring 2.

[0030] As a technical optimization scheme of the present utility model, a positioning block 7 is fixedly connected to one side of the first fixing block 402. The outer side of the positioning block 7 is clamped with the inner cavity of the second fixing block 403.

[0031] In this embodiment, by providing the positioning block 7, the connection stability between the first fixing block 402 and the second fixing block 403 is improved.

[0032] As a technical optimization solution of the present utility model, the connection mechanism 5 includes a connection sleeve 501. One end of the connection sleeve 501 is fixedly connected to the outer side of the blowing ring 2. A threaded sleeve 502 is threadedly connected to the inner cavity of the connection sleeve 501. A sealing washer 503 is provided at one end of the threaded sleeve 502. The end of the threaded sleeve 502 away from the sealing washer 503 communicates with the external connection pipe 6.

[0033] In this embodiment, when connecting the external connection pipe 6 to the blowing ring 2, the threaded sleeve 502 at one end of the external connection pipe 6 can be screwed into the connection sleeve 501, thereby fixing the external connection pipe 6 to the outer side of the blowing ring 2. This not only facilitates the user to fix the external connection pipe 6 to the blowing ring 2, but also facilitates the disassembly and maintenance of the external connection pipe 6 in the later stage. When a single external connection pipe 6 is damaged, there is no need to replace the entire device.

[0034] The working principle of the anti-sticking wall device for a spray drying tower for zero discharge of thermal power plant wastewater provided by the present utility model is as follows:

[0035] Before using this device, the external connection pipe 6 should be connected to the existing hot primary air pipeline of the thermal power plant. The hot air enters the inner cavity of the blowing ring 2 from the external connection pipe 6, and then the hot air is evenly ejected through the blowing ring 2. The blowing ring 2 is evenly provided with round holes for evenly distributing the hot air. The ejected hot air forms a pressure-bearing isolation area on the inner wall of the tower body 1, so that the wastewater droplets and the salts precipitated by the evaporation of the droplets cannot approach the inner wall of the tower body 1 and the blowing ring 2, effectively avoiding the phenomenon of material sticking to the wall. The external connection pipes 6 are evenly distributed in a two-layer ring around the circumference outside the blowing ring 2 to help the hot air evenly enter the entire inner cavity of the blowing ring 2. This device does not require additional power or compressed air, saves energy, and only needs to be connected to the existing hot primary air pipeline of the thermal power plant; it will not reduce the temperature of the flue gas in the drying tower and effectively prevent acid condensation; the structure is simple, the production materials are cheap and easy to obtain, the anti-sticking wall effect is good, and it adopts a modular design, which is convenient for production and transportation.

[0036] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. An anti-sticking device for a spray drying tower for zero discharge of wastewater from a thermal power plant, characterized in that: The invention comprises a tower body (1), wherein the inner cavity of the tower body (1) is provided with a blowing ring (2), the outer sides of the blowing ring (2) are respectively provided with a reinforcing mechanism (3) and a connecting mechanism (5), one side of the reinforcing mechanism (3) is provided with a fixing mechanism (4), one side of the connecting mechanism (5) is provided with an external pipe (6), and one end of the external pipe (6) passes through the inner wall of the tower body (1).

2. The anti-sticking wall device of the spray drying tower for zero discharge of wastewater from thermal power plants according to claim 1 is characterized in that: The reinforcement mechanism (3) comprises a reinforcement plate (301), the outer side of the blowing ring (2) being fixedly connected to the reinforcement plate (301), the top and bottom of the reinforcement plate (301) being fixedly connected to an upper reinforcement ring (302) and a lower reinforcement ring (303), respectively, and the inner cavities of the upper reinforcement ring (302) and the lower reinforcement ring (303) are both fixedly connected to the outer side of the blowing ring (2).

3. The anti-sticking wall device of the spray drying tower for zero discharge of wastewater from thermal power plants according to claim 1, characterized in that: The fixing mechanism (4) comprises a fixing seat (401), the fixing seat (401) being fixed to the inner wall of the tower body (1), a first fixing block (402) being fixedly connected to one side of the fixing seat (401), a second fixing block (403) being arranged on one side of the first fixing block (402), a fixing bolt (404) being arranged in the inner cavity of the first fixing block (402), and an outer side of the fixing bolt (404) being threadedly connected to the inner cavity of the second fixing block (403).

4. The anti-sticking wall device of the spray drying tower for zero discharge of wastewater from thermal power plants according to claim 3, characterized in that: A positioning block (7) is fixedly connected to one side of the first fixing block (402), and the outer side of the positioning block (7) is clamped with the inner cavity of the second fixing block (403).

5. The anti-sticking device for the spray drying tower for zero discharge of wastewater from thermal power plants according to claim 1, characterized in that: The connecting mechanism (5) comprises a connecting sleeve (501), one end of which is fixedly connected to the outer side of the blowing ring (2), the inner cavity of the connecting sleeve (501) is threadedly connected to a threaded sleeve (502), one end of the threaded sleeve (502) is provided with a sealing gasket (503), and the end of the threaded sleeve (502) away from the sealing gasket (503) is connected to the external pipe (6).