Defoaming agent conveying system for desulfurization system

Abstract

The utility model discloses a defoaming agent conveying system for a desulfurization system, which relates to the technical field of flue gas desulfurization and comprises a defoaming agent storage tank, a circulating slurry tank, a digestion tank, a water pump and a conveying pipeline, tank covers are arranged at tank openings of the circulating slurry tank and the digestion tank, each tank cover comprises a condensation dripping disc and a plurality of atomization nozzles, sawtooth strips are uniformly distributed on the disc surface of the condensation dripping disc, a round pipe is wound on the periphery of the condensation dripping disc, the round pipe is communicated with a conveying pipeline, a plurality of branch pipes are uniformly distributed in the circumferential direction of the round pipe, the tail ends of the branch pipes are connected with the atomization nozzles through adapters, and the atomization nozzles point to the sawtooth strips; the atomization defoaming agent is originally sprayed on the saw tooth strip, the atomization defoaming agent is gathered, condensed and flows to the tooth top on the surface of the saw tooth strip and finally drips from the tooth top, the dripped defoaming agent is enough to penetrate through a thick foam layer, and many defoaming agent liquid drops can rapidly eliminate foam, so that the defoaming effect is good. Compared with a traditional mode of atomizing and spraying the defoaming agent, the scheme is extremely high in defoaming efficiency, and compared with a traditional mode of manually adding the defoaming agent, the usage amount of the defoaming agent is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization technology, and in particular to an automated defoamer delivery system for semi-dry desulfurization (SDA) systems. Through optimized collaborative design of storage, delivery, injection and control units, it achieves drip-filling addition and efficient management of defoamer. Background Technology

[0002] In SDA desulfurization systems, large amounts of foam are often generated in the circulating slurry tank and digester due to chemical reactions, affecting desulfurization efficiency and equipment stability. Traditional defoamer addition relies on manual operation, which has the following problems:

[0003] 1. Low efficiency: Manual addition is difficult to maintain continuously and can easily lead to foam accumulation;

[0004] 2. Poor safety: Operators need to work at heights, which poses a risk of falling and exposure to chemicals;

[0005] 3. High cost: Labor costs account for a large proportion, and waste is easily caused by inaccurate addition.

[0006] In existing technologies, some automated conveying systems suffer from numerous problems such as pipe blockage, simplistic control logic, and insufficient equipment corrosion resistance. Therefore, there is an urgent need for an integrated and intelligent defoamer conveying system to address these technical pain points. Utility Model Content

[0007] The purpose of this invention is to provide a defoamer delivery system for desulfurization systems. Traditional defoamer addition methods are either manual or automated. Manual spraying often results in uneven distribution, with most of the defoamer being added to the same area, leading to significant waste and low defoaming efficiency. Automated methods often involve simple high-pressure spraying of defoamer, but the atomized defoamer lacks sufficient kinetic energy to quickly penetrate the thick foam layer, resulting in low defoaming efficiency. This invention innovatively sprays atomized defoamer onto a toothed strip, where it converges and condenses, flowing to the tips of the teeth and finally dripping down. The dripping defoamer is sufficient to penetrate the thick foam layer, and the numerous defoamer droplets can quickly eliminate foam, resulting in extremely high efficiency and no waste of defoamer.

[0008] To achieve the above objectives, this utility model provides a defoamer delivery system for a desulfurization system, comprising a defoamer storage tank, a circulating slurry tank, a digestion tank, a water pump, and a delivery pipeline. The water pump delivers the defoamer from the defoamer storage tank to the circulating slurry tank and the digestion tank respectively via the delivery pipeline. Each of the circulating slurry tank and the digestion tank has a tank cover at its opening. Each tank cover includes a condensation drip plate and multiple atomizing nozzles. The surface of the condensation drip plate is evenly distributed with serrated strips. A circular pipe surrounds the outer periphery of the condensation drip plate and connects to the delivery pipeline. Several branch pipes are evenly distributed around the circumference of the circular pipe. The ends of the branch pipes are connected to the atomizing nozzles via adapters, and the atomizing nozzles point towards the serrated strips.

[0009] Furthermore, this application provides a defoamer delivery system for a desulfurization system, wherein the adapter includes a 90° elbow and a universal ball joint connected together, the 90° elbow being connected to the branch pipe, and the end of the universal ball joint being threadedly connected to the atomizing nozzle.

[0010] Furthermore, this application provides a defoamer delivery system for a desulfurization system, wherein the defoamer storage tank is provided with a feeding port at the top, a discharge port and a drain pipe at the bottom, and a level gauge is provided on the side wall of the defoamer storage tank for real-time monitoring of the defoamer quantity.

[0011] Furthermore, this application provides a defoamer delivery system for a desulfurization system, wherein a valve a is added to the delivery pipeline located between the defoamer storage tank and the water pump, a main pipeline is provided at the outlet of the water pump, a tee is connected to the end of the main pipeline, the tee is connected to the circulating slurry tank and the digestion tank respectively through two delivery pipelines, and a valve b is added to the main pipeline.

[0012] Furthermore, this application provides a defoamer delivery system for a desulfurization system, which further includes a venting mechanism. The venting mechanism includes an air compressor and an air pipe. The front end of the air pipe is connected to the main pipeline between the valve b and the tee, and the rear end is connected to the exhaust port of the air compressor. It is used to vent the defoamer remaining in the delivery pipeline after the water pump stops. A two-position two-way solenoid valve is connected in series in the air pipe.

[0013] Furthermore, this application provides a defoamer delivery system for a desulfurization system, wherein the two delivery pipelines are respectively equipped with electric valves or manual valves.

[0014] Furthermore, this application provides a defoamer delivery system for a desulfurization system, which further includes an automatic control unit. The automatic control unit includes a PLC and a foam sensor. The foam sensor is installed in the circulating slurry tank and the digestion tank, respectively. When the foam sensor detects foam generation, the PLC commands the normally closed solenoid valve and the water pump to open. After the foam is eliminated, the electric valve or manual valve and the water pump are closed.

[0015] This invention has the following advantages over the prior art:

[0016] This application innovatively sprays atomized defoamer onto a toothed serrated strip. The atomized defoamer gathers and condenses on the toothed strip, flowing to the tips of the teeth and finally dripping from the tips. The dripping defoamer is sufficient to penetrate thick foam layers, and the numerous defoamer droplets can quickly eliminate foam. Compared with the traditional method of atomizing and spraying defoamer, this solution has extremely high defoaming efficiency, and compared with the method of manual addition, the amount of defoamer used is greatly reduced. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an antifoaming agent delivery system for a desulfurization system according to the present invention.

[0018] Figure 2 This is a schematic diagram of the tank cover structure in a defoamer delivery system for a desulfurization system according to the present invention.

[0019] The components include: 1. Defoamer storage tank; 2. Circulating slurry tank; 3. Digestion tank; 4. Water pump; 5. Conveying pipeline; 6. Feed port; 7. Discharge port; 8. Drain pipe; 9. Level gauge; 10. Tank cover; 11. Condensation drip tray; 12. Atomizing nozzle; 13. Serrated strip; 14. Round pipe; 15. Branch pipe; 16. 90° elbow; 17. Universal ball joint; 18. Valve a; 19. Main pipeline; 20. T-junction; 21. Valve b; 22. Normally closed solenoid valve; 23. Air compressor; 24. Air pipe; 25. Two-position two-way solenoid valve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 and Figure 2 As shown, this embodiment provides a defoamer delivery system for a desulfurization system, which includes a defoamer storage tank 1, a circulating slurry tank 2, a digestion tank 3, a water pump 4, and a delivery pipeline 5. The defoamer storage tank 1 is provided with a feeding port 6 at the top, a discharge port 7 at the bottom, and a drain pipe 8. The side wall of the defoamer storage tank 1 is equipped with a level gauge 9 for real-time monitoring of the defoamer level. The water pump 4 delivers the defoamer in the defoamer storage tank 1 to the circulating slurry tank 2 and the digestion tank 3 through the delivery pipeline 5. The openings of the circulating slurry tank 2 and the digestion tank 3 are each provided with a tank cover 10. The device includes a condensation drip tray 11 and multiple atomizing nozzles 12. The surface of the condensation drip tray 11 is evenly distributed with serrated strips 13. A circular pipe 14 surrounds the outer periphery of the condensation drip tray 11. The circular pipe 14 is connected to the conveying pipe 5. Several branch pipes 15 are evenly distributed around the circular pipe 14. The ends of the branch pipes 15 are connected to the atomizing nozzles 12 via adapters. The atomizing nozzles 12 point towards the serrated strips 13. The adapter includes a 90° elbow 16 and a universal ball joint 17 connected together. The 90° elbow 16 is connected to the branch pipe 15, and the end of the universal ball joint 17 is threaded to the atomizing nozzle 12.

[0024] A valve a18 is added to the conveying pipeline 5 located between the defoamer storage tank 1 and the water pump 4. A main pipeline 19 is set at the outlet of the water pump 4. A tee 20 is connected to the end of the main pipeline 19. The tee 20 is connected to the circulating slurry tank 2 and the digestion tank 3 respectively through two conveying pipelines 5. A valve b21 is added to the main pipeline 19. Normally closed solenoid valves 22 are installed on the two conveying pipelines 5 respectively.

[0025] It also includes a venting mechanism and an automatic control unit. The venting mechanism includes an air compressor 23 and an air pipe 24. The front end of the air pipe 24 is connected to the main pipe 19 between the valve b21 and the tee 20, and the rear end is connected to the exhaust port of the air compressor 23. It is used to vent the defoamer remaining in the delivery pipe 5 after the water pump 4 stops. A two-position two-way solenoid valve 25 is connected in series in the air pipe 24. The automatic control unit includes a PLC and a foam sensor. The foam sensor is installed in the circulating slurry tank 2 and the digestion tank 3 respectively. When the foam sensor detects foam generation, the PLC commands the normally closed solenoid valve 22 and the water pump 4 to open. After the foam is eliminated, the normally closed solenoid valve 22 and the water pump 4 are closed.

[0026] The working process and principle of this embodiment are as follows: Foam sensors are installed in both the circulating slurry tank 2 and the digestion tank 3. When the foam sensor in the circulating slurry tank 2 detects foam generation, the PLC commands the corresponding normally closed solenoid valve 22, valve a18, and valve b21 to open, and then the water pump 4 is started. The water pump 4 transports the defoamer in the defoamer storage tank 1 along the conveying pipe 5 to the corresponding tank cover 10. The defoamer fills the entire circular pipe 14, and then enters each branch pipe 15, and finally sprays it onto the serrated blade 13 through the atomizing nozzle 12. In this embodiment, the serrated blade 13 is made of stainless steel. The atomized defoamer initially adheres to the surface of the serrated blade 13. As the atomization concentration increases, the droplets adhering to the surface of the serrated blade 13 gradually condense. When the droplets increase to a certain volume, they slide down the serrated blade 13 to the tip of the tooth and drip from the tip into the circulating slurry tank 2. Similar to rain, a certain volume of droplets disperses and continuously drips into the thick foam. Compared to atomized defoamer, the dripping droplets have stronger penetrating power and a larger contact area compared to manual addition. By simultaneously satisfying the requirements of a larger contact area and stronger penetrating power, the foam can be quickly eliminated. If the foam sensor in the digestion tank 3 detects the generation of foam, the process is the same as described above. The foam in one tank can be eliminated individually or in both tanks simultaneously. After the foam sensor no longer detects foam, the PLC sequentially shuts down the water pump 4, valve a18, and valve b21, and opens the two-position two-way solenoid valve 25 and the air pump. High-pressure gas enters the main pipeline 19 along the air pipe 24 and then enters the two-way delivery pipeline 5 through the three-way valve 20, forcibly blowing out the residual defoamer and preventing pipe blockage.

[0027] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0028] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A defoamer delivery system for a desulfurization system, characterized in that, The system includes a defoamer storage tank, a circulating slurry tank, a digestion tank, a water pump, and a delivery pipeline. The water pump delivers the defoamer from the defoamer storage tank to the circulating slurry tank and the digestion tank via the delivery pipeline. Each tank has a lid at its opening, and each lid includes a condensation drip plate and multiple atomizing nozzles. The surface of the condensation drip plate is evenly distributed with serrated strips, and a circular pipe surrounds the outer periphery of the condensation drip plate. The circular pipe is connected to the delivery pipeline, and several branch pipes are evenly distributed around the circumference of the circular pipe. The ends of the branch pipes are connected to the atomizing nozzles via adapters, and the atomizing nozzles point towards the serrated strips.

2. The defoamer delivery system for a desulfurization system according to claim 1, characterized in that, The adapter includes a 90° elbow and a universal ball joint connected together. The 90° elbow is connected to the branch pipe, and the end of the universal ball joint is threaded to the atomizing nozzle.

3. The defoamer delivery system for a desulfurization system according to claim 1, characterized in that, The defoamer storage tank is equipped with a feeding port at the top and a discharge port and vent pipe at the bottom. The side wall of the defoamer storage tank is equipped with a level gauge for real-time monitoring of the defoamer level.

4. The defoamer delivery system for a desulfurization system according to claim 1, characterized in that, A valve a is added to the delivery pipeline located between the defoamer storage tank and the water pump. A main pipeline is installed at the outlet of the water pump. A tee is connected to the end of the main pipeline. The tee is connected to the circulating slurry tank and the digestion tank through two delivery pipelines respectively. A valve b is added to the main pipeline.

5. The defoamer delivery system for a desulfurization system according to claim 4, characterized in that, It also includes a venting mechanism, which includes an air compressor and an air pipe. The front end of the air pipe is connected to the main pipeline between the valve b and the tee, and the rear end is connected to the exhaust port of the air compressor. It is used to vent the defoamer remaining in the delivery pipeline after the water pump stops. A two-position two-way solenoid valve is connected in series in the air pipe.

6. The defoamer delivery system for a desulfurization system according to claim 4, characterized in that, The two conveying pipelines are equipped with electric valves or manual valves respectively.

7. The defoamer delivery system for a desulfurization system according to claim 6, characterized in that, It also includes an automatic control unit, which includes a PLC and a foam sensor. The foam sensor is installed in the circulating slurry tank and the digestion tank respectively. When the foam sensor detects foam generation, the PLC commands the normally closed solenoid valve and the water pump to open. After the foam is eliminated, the electric valve or manual valve and the water pump are closed.

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