Water system for flue gas desulfurization
By installing a sulfur content monitor and a timing opening and closing mechanism in the flue gas desulfurization water system, the timing and quantitative addition of alkali liquid is achieved, and the scaling problem caused by inaccurate addition of alkali liquid in the existing system is solved, and the operation and maintenance stability and sustainability of the system are improved.
Patent Information
- Application Number
- CN202421961708.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing flue gas desulfurization water system has insufficient accuracy in monitoring and controlling the addition of alkaline liquid, which leads to prone to scaling of the desulfurization tank and pipelines, which is a high burden on system maintenance, affecting the normal progress of flue gas treatment operations.
The sulfur content monitor is installed on the smoke outlet pipe of the desulfurization tower, as a terminal monitoring, and a timed opening and closing mechanism is installed on the alkali liquid output pipeline of the alkali liquid tank, and the timing and quantitative addition of the alkali liquid is realized through terminal data support to form linkage control.
Accurate control of the pH of the desulfurization tank and pipelines is achieved, scaling problems are avoided, the system operation and maintenance pressure is greatly reduced, and the operation stability and sustainability of the flue gas treatment system are ensured.
Smart Images
Figure CN223004994U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of textile smoke treatment equipment, and more specifically, to a water system for smoke desulfurization. Background Art
[0002] A large amount of high-temperature water and high-temperature steam are needed in the production process of the textile industry. Therefore, general textile enterprises are equipped with boiler equipment to meet production needs. Textile boiler equipment mostly uses coal-fired models, which will produce a large amount of coal smoke exhaust gas during its use. Therefore, textile enterprises have a need for flue gas treatment.
[0003] Spray desulfurization is an important method for flue gas treatment. Spray desulfurization requires a large amount of water to treat flue gas. The water system used in spray desulfurization includes a desulfurization tower and a desulfurization pool. The desulfurization pool provides water for the spray device in the desulfurization tower, and at the same time recycles the spray water in the desulfurization tower for recycling. The pH of the water in the desulfurization pool determines the spray quality in the desulfurization tower. The higher the alkalinity, the better the desulfurization effect. However, too high alkalinity will also cause rapid scaling and blockage in the pool and pipelines. Therefore, the pH of the water in the desulfurization pool needs to be maintained within a certain range, which can not only ensure the normal operation of the water system, but also ensure the quality of flue gas desulfurization. The current practice is to install an online pH meter in the desulfurization tank to monitor the pH of the tank water. However, since the desulfurization tank is installed in the open air, the online pH meter needs to be inserted into the tank for monitoring. The operating environment is very harsh and the monitoring accuracy is greatly affected. In the case of inaccurate pH monitoring, in order to ensure the desulfurization effect, workers consciously increase the amount of alkali added, which can easily lead to the problem of high alkalinity of the tank water. Scaling problems in desulfurization tanks and pipelines are relatively common, the system maintenance burden is heavy, and it is easy to affect the normal progress of flue gas treatment operations. Enterprises urgently need to make technical improvements to the existing flue gas desulfurization water system. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a water system for flue gas desulfurization. In this system, a sulfur content monitor is installed on the smoke outlet pipe of the desulfurization tower as terminal monitoring, and a timing opening and closing mechanism is installed on the alkali output pipeline of the alkali tank. The terminal monitoring and the timing opening and closing mechanism are linked to each other, and the timing and quantitative addition of alkali solution is realized by relying on the terminal data support. After the application of this system, it can not only ensure the quality of desulfurization operation, but also solve the scaling problem of the desulfurization tank and pipeline.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A water system for flue gas desulfurization, comprising a desulfurization tower, a desulfurization tank and an alkali liquid tank. A spraying device is installed in the desulfurization tower. An exhaust pipe is provided at the top of the desulfurization tower. A sulfur content monitor is installed on the exhaust pipe. The sulfur content monitor can monitor the sulfur content of the discharged flue gas. A drain port is provided at the bottom of the desulfurization tower. The drain port is connected to the desulfurization tank through a pipeline. The desulfurization tank is connected to the spraying device through a pipeline. An alkali liquid output pipeline is installed at the outlet end of the alkali liquid tank. The alkali liquid output pipeline is connected to the desulfurization tank through a pipeline. A timing opening and closing mechanism is installed on the alkali liquid output pipeline. The timing opening and closing mechanism can control the opening and closing of the alkali liquid output pipeline.
[0007] Further, the timing opening and closing mechanism includes a pipeline valve, an elastic pressing component, a pressing driving component and a control box. The pipeline valve is connected to the alkali liquid output pipeline. A push-button switch is provided on the pipeline valve. The elastic pressing component and the pressing driving component are installed in the control box. The elastic pressing component includes a rod box and a pressing rod. The pressing rod is vertically and penetratively installed in the rod box. The pressing driving component includes a rotatably installed cam disc. The upper end of the pressing rod contacts the outer edge of the cam disc. During the rotation of the cam disc, the pressing rod can be driven to move downward. The push-button switch is arranged on the downward movement track line of the pressing rod. The downward moving pressing rod can form a pressing effect on the push-button switch.
[0008] Further, a spring hole is provided in the rod box. A guiding piston is fixedly connected to the outer wall of the pressing rod. The guiding piston is fitted and installed in the spring hole. A spring is installed in the spring hole. The spring is sleeved outside the pressing rod. The guiding piston presses on the spring.
[0009] Further, the pressing driving component further includes a reducer and a motor. The reducer and the motor are installed outside the control box. The output end of the motor is connected to the input end of the reducer. The output end of the reducer is connected with a rotating shaft. The cam disc is threadedly connected to the rotating shaft. A nut is threadedly installed on the rotating shaft. The cam disc can be fixed by the nut.
[0010] Further, a convex section and a smooth section are provided on the outer edge of the cam disc. When the convex section contacts the pressing rod, the pressing rod forms a pressing effect on the push-button switch. When the smooth section contacts the pressing rod, the pressing rod is separated from the push-button switch.
[0011] Further, a specification mark is engraved on the cam disc.
[0012] Further, a movable door is installed on the control box.
[0013] The beneficial effects of the present utility model are:
[0014] The utility model installs a sulfur content monitor on the smoke outlet pipe of the desulfurization tower for terminal monitoring, and installs a timing opening and closing mechanism on the lye output pipeline of the lye tank. The terminal monitoring and the timing opening and closing mechanism form a linkage, and rely on the support of terminal data to achieve the timing and quantitative addition of lye. The utility model has the advantages of accurate monitoring data and timely addition of lye. After applying the utility model, it can not only ensure the quality of desulfurization operation, but also well solve the scaling problem of the desulfurization tank and pipeline, greatly reducing the system operation and maintenance pressure and ensuring the operation stability and continuity of the flue gas treatment system. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the pipeline connection of a water system for flue gas desulfurization in this embodiment;
[0016] Figure 2 It is a front view transmission structure diagram of the timing opening and closing mechanism in this embodiment;
[0017] Figure 3 It is a side view transmission structure diagram of the timing opening and closing mechanism in this embodiment.
[0018] Reference numerals: desulfurization tower 1, spraying device 11, smoke outlet pipe 12, sulfur content monitor 13, liquid discharge port 14, desulfurization tank 2, lye tank 3, lye output pipeline 31, timing opening and closing mechanism 4, pipeline valve 41, push-button switch 411, elastic pressing assembly 42, rod box 421, spring hole 4211, pressing rod 422, guiding piston 423, spring 424, pressing drive assembly 43, cam disc 431, convex section 4311, smooth section 4312, specification label 4313, speed reducer 432, rotating shaft 4321, nut 4322, motor 433, control box 44, movable door 441. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0020] As Figures 1 - 3A water system for flue gas desulfurization as shown, includes a desulfurization tower 1, a desulfurization pool 2 and an alkali solution tank 3. A spraying device 11 is installed in the desulfurization tower 1. The spraying device 11 can form a spraying water mist layer to produce a desulfurization effect on the passing flue gas. A liquid discharge port 14 is provided at the bottom of the desulfurization tower 1. After the spraying water naturally falls, it gathers at the bottom of the desulfurization tower 1 and is discharged from the liquid discharge port 14. A smoke outlet pipe 12 is provided at the top of the desulfurization tower 1. The sulfur content of the flue gas passing through the desulfurization tower 1 is greatly reduced and meets the emission requirements, and can be discharged from the smoke outlet pipe 12. The smoke outlet pipe 12 is the terminal of the flue gas journey. A sulfur content monitor 13 is installed on the smoke outlet pipe 12. The sulfur content monitor 13 can monitor the sulfur content of the discharged flue gas to form terminal data collection. The liquid discharge port 14 is connected to the desulfurization pool 2 through a pipeline. The desulfurization pool 2 is connected to the spraying device 11 through a pipeline. In the desulfurization water system, the desulfurization pool 2 is responsible for supplying water to the spraying device 11 to meet the requirements of the spraying desulfurization operation. At the same time, the desulfurized water returns through the pipeline of the liquid discharge port 14 to form a recycling of water resources. Since the water is used for the desulfurization operation, with the increase of sulfur substances, the acidity in the desulfurization pool 2 will increase, and the increased acidity will affect the desulfurization effect. Therefore, this system is also designed with an alkali solution tank 3 to supplement alkali solution to the desulfurization pool 2 to ensure the quality of the desulfurization operation. An alkali solution output pipeline 31 is installed at the outlet end of the alkali solution tank 3. The alkali solution output pipeline 31 is connected to the desulfurization pool 2 through a pipeline. The alkali solution is transported to the desulfurization pool 2 through the pipeline of the alkali solution output pipeline 31. The alkali solution cannot be added without limit, which will cause the desulfurization pool 2 to be alkaline. Although alkaline water is beneficial to improving the desulfurization operation effect, it will cause the desulfurization pool 2 and the conveying pipeline to scale quickly and in large quantities. Scaling will cause insufficient pool capacity and pipeline blockage, and it is very difficult to handle after scaling, with a large operation and maintenance pressure, and the flue gas desulfurization operation needs to be interrupted. At present, enterprises use an online pH meter installed in the desulfurization pool 2 to control the acidity of the desulfurization pool 2. However, it is found in actual use that the desulfurization pool 2 is installed outdoors, and the online pH meter needs to extend into the pool for monitoring, and its operating environment is very harsh, and the monitoring accuracy is greatly affected. To ensure the desulfurization effect, workers still consciously increase the amount of alkali added, and it is easy to have the problem of too high alkalinity of the pool water, and the scaling problem still occurs frequently. Therefore, the above-mentioned scheme of installing an online pH meter in the desulfurization pool 2 is not advisable. The present utility model redesigned the water system scheme, and installed a timing opening and closing mechanism 4 on the alkali solution output pipeline 31 of the alkali solution tank 3. The timing opening and closing mechanism 4 can control the opening and closing of the alkali solution output pipeline 31. The sulfur content monitor 13 of the present utility model is at the terminal of the flue gas journey. Because its monitoring environment is good, it can obtain accurate sulfur data at the flue gas terminal. In the present utility model, the terminal data of the sulfur content monitor 13 is associated with the opening and closing movement of the timing opening and closing mechanism 4. There is a sulfur content upper limit requirement for flue gas emissions. 60% of the sulfur content upper limit is set as the opening threshold of the timing opening and closing mechanism 4. When the data monitored by the sulfur content monitor 13 is lower than the opening threshold of the timing opening and closing mechanism 4, the timing opening and closing mechanism 4 does not open and no alkali solution is added. When the data monitored by the sulfur content monitor 13 is higher than the opening threshold of the timing opening and closing mechanism 4,The timing opening and closing mechanism 4 opens. The timing opening and closing mechanism 4 can be opened for a certain period of time to discharge a certain amount of lye into the desulfurization tank 2. In the solution of the present utility model, although the pH value of the desulfurization tank 2 is not monitored, the pH value of the desulfurization tank 2 can be ensured to be appropriate. This is because if the data monitored by the sulfur content monitor 13 is lower than the opening threshold of the timing opening and closing mechanism 4, it proves that the desulfurization effect is stable and good, and it proves that the water supplied to the spray device 11 by the desulfurization tank 2 has an appropriate pH value. If the data monitored by the sulfur content monitor 13 is higher than the opening threshold of the timing opening and closing mechanism 4, lye will also be added in a timely manner, and this addition has a quantitative effect, which can ensure that the addition amount will not exceed the standard, and can well stabilize the pH value of the desulfurization tank 2. After the actual application of the present utility model, it is found that the pH value of the desulfurization tank 2 can be controlled to be neutral or weakly acidic, and the scaling problems of the desulfurization tank 2 and the pipeline can be well solved. After the application of the present utility model, the operation and maintenance pressure is significantly reduced, and the operation stability and operation continuity of the matched flue gas treatment system are significantly improved.
[0021] Such as Figure 2 And Figure 3As shown, the timing opening and closing mechanism 4 includes a pipeline valve 41, an elastic pressing component 42, a pressing driving component 43 and a control box 44. The pipeline valve 41 is connected to the lye output pipeline 31. A push switch 411 is provided on the pipeline valve 41. When the push switch 411 is not pressed, the pipeline valve 41 is in a normally closed state and the lye output pipeline 31 does not output lye. When the push switch 411 is pressed, the pipeline valve 41 will open, forming a liquid output effect of the lye output pipeline 31. After the push of the push switch 411 is released, the pipeline valve 41 will automatically close again. The pressing time of the push switch 411 determines the output duration of the lye, and the duration determines the output volume of the lye. Therefore, as long as the pressing time of the push switch 411 is controlled, the quantitative output of the lye can be achieved. The elastic pressing component 42 and the pressing driving component 43 are installed in the control box 44. The elastic pressing component 42 includes a rod box 421 and a pressing rod 422. The pressing rod 422 is vertically and penetratively installed in the rod box 421. The pressing rod 422 is vertically movably installed. The pressing driving component 43 includes a cam disc 431 rotatably installed. The upper end of the pressing rod 422 contacts the outer edge of the cam disc 431. During the rotation of the cam disc 431, the pressing rod 422 can be driven to move downward. The push switch 411 is arranged on the downward movement track line of the pressing rod 422. The downward moving pressing rod 422 can form a pressing effect on the push switch 411. The outer edge of the cam disc 431 is provided with a convex section 4311 and a smooth section 4312. When the convex section 4311 contacts the pressing rod 422, the pressing rod 422 moves downward, and the pressing rod 422 forms a pressing effect on the push switch 411. When the smooth section 4312 contacts the pressing rod 422, the pressing rod 422 returns upward and separates from the push switch 411. In the present utility model, the length of the convex section 4311 determines the opening duration of the push switch 411, that is to say, the length of the convex section 4311 determines the output volume of the lye. When the flue gas treatment system operates at different loads, the amount of lye added each time needs to change. When the load of the flue gas treatment system is large, the desulfurization effect is intense, and the amount of lye to be added each time is more. When the load of the flue gas treatment system is small, the amount of lye to be added each time should also be reduced accordingly. Changing the added lye amount can be achieved by replacing the cam disc 431. A specification label 4313 is engraved on the cam disc 431. The specification label 4313 represents the length of the convex section 4311, determines the opening duration of the push switch 411, and determines the amount of lye added each time. When the flue gas treatment system of the enterprise operates at full load, the duration of adding lye each time is set to 10 seconds. When operating at half load, the duration of adding lye each time is set to 5 seconds. Changing the set duration can be achieved by replacing the cam disc 431 with different specification labels 4313.
[0022] As Figure 3As shown in the figure, a spring hole 4211 is provided inside the rod box 421. A guiding piston 423 is fixedly connected to the outer wall of the pressing rod 422. The guiding piston 423 is fitted and installed inside the spring hole 4211. The guiding piston 423 plays a role in guiding the movement of the pressing rod 422, enabling it to move vertically up and down only. A spring 424 is installed inside the spring hole 4211. The spring 424 is sleeved outside the pressing rod 422. The guiding piston 423 presses on the spring 424. The spring 424 drives the pressing rod 422 to move upward by lifting the guiding piston 423, so that the upper end of the pressing rod 422 always contacts the outer edge of the cam disk 431. When the outer edge of the cam disk 431 rotates to the convex section 4311, the pressing rod 422 moves downward and the spring 424 is compressed. When the cam disk 431 rotates to the smooth section 4312, under the elastic force of the spring 424, the pressing rod 422 moves upward.
[0023] As Figure 3 shown in the figure, the pressing drive assembly 43 further includes a speed reducer 432 and a motor 433. The speed reducer 432 and the motor 433 are installed outside the control box 44. The output end of the motor 433 is connected to the input end of the speed reducer 432. The output end of the speed reducer 432 is connected with a rotating shaft 4321. The cam disk 431 is threadedly connected to the rotating shaft 4321. A nut 4322 is threadedly installed on the rotating shaft 4321. The cam disk 431 can be fixed by the nut 4322. When the data monitored by the sulfur content monitor 13 is higher than the opening threshold of the timing opening and closing mechanism 4, a start signal will be given to the motor 433. The speed reducer 432 plays a role in reducing the speed. After the motor 433 starts, it drives the cam disk 431 to rotate through the rotating shaft 4321. Each time the motor 433 starts, it is only required to complete one low-speed rotation of the cam disk 431. In this way, each start completes one addition of lye. The cam disk 431 is fixedly installed by threads and has the advantage of being convenient for disassembly and assembly, which is convenient for replacement operation.
[0024] As Figure 3 shown in the figure, a movable door 441 is installed on the control box 44. The control box 44 plays a role in protecting the timing opening and closing mechanism 4. When the movable door 441 is opened, the disassembly and replacement operation of the cam disk 431 can be carried out.
[0025] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.
Claims
1. A water system for flue gas desulfurization, characterized in that: The invention comprises a desulfurization tower (1), a desulfurization pool (2) and an alkali liquid tank (3), wherein a spray device (11) is installed in the desulfurization tower (1), a smoke outlet pipe (12) is installed on the top of the desulfurization tower (1), a sulfur content monitor (13) is installed on the smoke outlet pipe (12), and the sulfur content monitor (13) can monitor the sulfur content of the exhaust flue gas, a liquid discharge port (14) is provided at the bottom of the desulfurization tower (1), and the liquid discharge port (14) is connected to the desulfurization pool (2) through a pipeline, and the desulfurization pool (2) is connected to the spray device (11) through a pipeline, an alkali liquid output pipeline (31) is installed at the outlet end of the alkali liquid tank (3), and the alkali liquid output pipeline (31) is connected to the desulfurization pool (2), and a timing opening and closing mechanism (4) is installed on the alkali liquid output pipeline (31), and the timing opening and closing mechanism (4) can control the opening and closing of the alkali liquid output pipeline (31).
2. A water system for flue gas desulfurization according to claim 1, characterized in that: The timing opening and closing mechanism (4) comprises a pipeline valve (41), an elastic pressing component (42), a pressing drive component (43) and a control box (44); the pipeline valve (41) is connected to the alkali solution output pipeline (31); the pipeline valve (41) is provided with a pressing switch (411); the elastic pressing component (42) and the pressing drive component (43) are installed in the control box (44); the elastic pressing component (42) comprises a rod box (421) and a pressing rod (422); the pressing rod (422) is vertically and penetratedly installed in the rod box (421), the pressing drive assembly (43) includes a rotatably installed cam plate (431), the upper end of the pressing rod (422) contacts the outer edge of the cam plate (431), and the cam plate (431) can drive the pressing rod (422) to move downward during rotation. The pressing switch (411) is arranged on the downward movement trajectory of the pressing rod (422), and the pressing rod (422) moving downward can form a pressing effect on the pressing switch (411).
3. A water system for flue gas desulfurization according to claim 2, characterized in that: A spring hole (4211) is provided in the rod box (421), a guide piston (423) is fixedly connected to the outer wall of the pressing rod (422), the guide piston (423) is matched and installed in the spring hole (4211), a spring (424) is installed in the spring hole (4211), the spring (424) is sleeved on the outside of the pressing rod (422), and the guide piston (423) is pressed on the spring (424).
4. A water system for flue gas desulfurization according to claim 2, characterized in that: The pressing drive assembly (43) further comprises a reducer (432) and a motor (433), wherein the reducer (432) and the motor (433) are mounted on the outside of the control box (44), wherein the output end of the motor (433) is connected to the input end of the reducer (432), wherein the output end of the reducer (432) is connected to a rotating shaft (4321), wherein the cam plate (431) is threadedly connected to the rotating shaft (4321), wherein a nut (4322) is threadedly mounted on the rotating shaft (4321), and the cam plate (431) can be fixed by means of the nut (4322).
5. A water system for flue gas desulfurization according to claim 2, characterized in that: The outer edge of the cam plate (431) is provided with a convex section (4311) and a smooth section (4312); when the convex section (4311) contacts the pressing rod (422), the pressing rod (422) exerts a pressing effect on the pressing switch (411); when the smooth section (4312) contacts the pressing rod (422), the pressing rod (422) is separated from the pressing switch (411).
6. A water system for flue gas desulfurization according to claim 2, characterized in that: The cam disc (431) is engraved with a specification mark (4313).
7. A water system for flue gas desulfurization according to claim 2, characterized in that: A movable door (441) is installed on the control box (44).