Desulfurizing tower slurry pool caustic soda flake dosing device

Abstract

The utility model discloses a caustic soda flake dosing device for a slurry pool of a desulfurizing tower, which is characterized in that a flaky sodium hydroxide packaging bag is transversely placed on a conveying belt, the conveying belt conveys the flaky sodium hydroxide packaging bag to a guide plate on a feeding port, the guide plate is of a triangular structure, and the inclined ends of the two sides of the guide plate form an angle, so that the flaky sodium hydroxide packaging bag can fall into and be erected on the guide plate; meanwhile, cutting devices are arranged on the two sides of the inclined end of the guide plate, and gears of the cutting devices enable two cutting tool bits to reciprocate through driving and eccentric rod design so as to cut the sheet-shaped sodium hydroxide packaging bags and enable the medicaments to fall into a feeding port; the driving motor rotates forwards to enable flaky sodium hydroxide to fall into the dissolving and uniform mixing box through the discharging port, the flaky sodium hydroxide is stirred in the stirring bin in the reverse rotation mode, sodium hydroxide adhesion is avoided, then the flaky sodium hydroxide enters the mixing device, and a stirring rod and a stirring blade are arranged in the device to rotate, so that sodium hydroxide is rapidly dissolved in water; the PH online monitoring device is arranged on the slurry pond, signals are transmitted to the DCS, the DCS controls the opening degree of a valve and the speed of a motor of a stirring bin according to the PH signals, the dosage is adjusted through PID so that the PH value can be kept stable, and in order to reduce the process of making contact with chemicals manually, workers only need to clean waste material bags on a guide plate and place the waste material bags in the transportation process so that work safety can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of caustic soda dosing equipment, in particular to a caustic soda dosing device for a slurry pool of a desulfurization tower. Background Technique

[0002] At present, the dosing process of desulfurization agents in the wet desulfurization process completely relies on manual operation. The operator needs to add sodium hydroxide contained in bags into a mixing tank, ensure sufficient stirring and mixing, and then add the mixture into the slurry pool at one time. This operation has occupational health risks, and it is difficult to accurately control the dosage of the agent. In the wet desulfurization process of the double-alkali method, solid flake sodium hydroxide is a crucial desulfurization agent. However, during the storage and dosing process of the agent, it is often difficult to accurately control the dosage of the agent, which results in too high or too low pH value of the slurry, thus directly affecting the data of the flue gas desulfurization effect. Content of the Utility Model

[0003] The purpose of the utility model is to provide a caustic soda dosing device for a slurry pool of a desulfurization tower, so as to solve the problems that the dosing process completely relies on manual operation, which poses occupational health risks to the staff, and at the same time, the dosage of the agent cannot be accurately controlled, resulting in too high or too low pH value of the slurry.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A caustic soda dosing device for a slurry pool of a desulfurization tower, which is controlled based on a DCS system and installed on the ground, includes a conveyor belt, on which packaging bags of flake sodium hydroxide are placed, an inlet of a stirring device provided at the discharge opening of the conveyor belt, a cutting device provided at the inlet, a mixing device provided at the discharge opening of the stirring device, and a sunken slurry pool provided at the discharge opening of the mixing device.

[0005] The inlet is a trapezoidal trough frame, fixedly connected to the top of the stirring device, corresponding to the discharge opening of the conveyor belt. A guide plate is horizontally arranged in the middle of the inlet, and a packaging bag of flake sodium hydroxide is placed on the guide plate. The guide plate is triangularly arranged, and cutting devices are connected to the bottom ends of the two oblique ends of the guide plate.

[0006] The cutting device includes a housing, connecting rods, gears, guide frames, moving blocks, and linkage grooves. The housing is fixedly connected to the inlet. Guide frames are respectively fixedly connected to the upper and lower ends of the left side of the housing. A pair of connecting rods are hinged on the housing. A pair of gears are arranged on the left side of the connecting rods, and the gears are meshed with each other. The input shaft of any gear is connected to the output shaft of a first driving motor. Linkage grooves are formed on the connecting rods, and eccentric rods provided on the gears are slidably fitted in the linkage grooves. The top ends of the connecting rods are hinged with moving blocks, and the moving blocks are slidably fitted in the chutes formed on the guide frames. Cutting heads are correspondingly arranged at the contact ends of the two moving blocks, and the cutting heads are arranged in a staggered manner.

[0007] Preferably, the stirring device includes a receiving shell, a spiral stirring blade, and a second driving motor. A spiral stirring blade is arranged inside the receiving shell. The input shaft of the spiral stirring blade is connected to the output shaft of the second driving motor. The top end of the spiral stirring blade is connected to the discharge port of the receiving shell, and the other end is connected to the input shaft.

[0008] Preferably, the mixing device includes a mixing tank, stirring rods, and stirring blades. A rotating shaft is connected to the middle inside the mixing tank. The input shaft of the rotating shaft is connected to the output shaft of the third driving motor. Stirring rods are fixedly connected to both sides of the rotating shaft. The stirring rods are arranged in an L shape, and a number of stirring blades are connected to the stirring rods. The stirring blades are rectangular groove-shaped blades. A discharge pipe is flange-connected to the outer circumference of the mixing tank.

[0009] Preferably, a water inlet pipe is further included. The water inlet pipe is flange-connected to the mixing device, and a check valve is connected to the water inlet pipe.

[0010] Preferably, the other end of the discharge pipe is connected to a sunken slurry pool. A chemical addition valve is connected to the discharge pipe, and a controller is connected to the chemical addition valve for controlling the opening or closing of the valve and controlling the feeding amount of the mixed chemical.

[0011] Preferably, a pH monitor is connected to the sunken slurry pool. The top end of the pH monitor hangs into the sunken slurry pool, and a transmitter is further arranged on the pH monitor for transmitting the pH data inside the sunken slurry pool.

[0012] Preferably, the stirring device is obliquely arranged for storing materials.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] By placing the packaging bag of flake sodium hydroxide horizontally on the conveyor belt, the conveyor belt transports it to the guide plate above the feeding port. The guide plate is of a triangular structure, and the two inclined ends on both sides are angled, enabling the packaging bag of flake sodium hydroxide to fall and rest on the guide plate. At the same time, cutting devices are arranged on both sides of the inclined ends of the guide plate. The gears of the cutting devices are driven, and the eccentric rod design makes the two cutting heads move reciprocally to cut the packaging bag of flake sodium hydroxide, allowing the medicament to fall into the feeding port. Subsequently, the stirring device adopts a spiral stirring blade design. When the driving motor rotates forward, the flake sodium hydroxide falls into the dissolution and mixing tank through the discharge port. When it rotates in reverse, the flake sodium hydroxide is stirred in the stirring chamber to prevent sodium hydroxide from sticking. Then it enters the mixing device, where stirring rods and stirring blades rotate inside the device to quickly dissolve sodium hydroxide in water. At the same time, a PH on-line monitoring device is provided on the slurry pool, which transmits signals to the DCS. The DCS controls the valve opening and the speed of the stirring chamber motor according to the PH signal, and adjusts the chemical dosage through PID to maintain the stability of the PH value. To reduce the process of manual contact with the medicament, the staff only needs to clean the waste material bags on the guide plate and their placement during transportation to ensure work safety. Description of the Drawings

[0015] Figure 1 It is a schematic front view of the overall structure of the present utility model.

[0016] Figure 2 It is a schematic view of the overall structure of the present utility model.

[0017] Figure 3 It is a schematic view of the structure of the mixing device of the present utility model.

[0018] Figure 4 It is a schematic view of the structure of the cutting device of the present utility model.

[0019] Figure 5 It is a schematic view of the mutually cooperating structure of the guide plate and the feeding port of the present utility model.

[0020] Figure 6 It is a schematic view of the structure of the spiral stirring blade of the present utility model.

[0021] In the figure: 1, conveyor belt; 2, feeding port; 3, cutting device; 301, connecting rod; 302, gear; 303, guide frame; 304, moving block; 305, linkage groove; 4, stirring device; 401, spiral stirring blade; 5, mixing device; 501, mixing tank; 502, stirring rod; 503, stirring blade; 6, discharge pipe; 7, chemical addition valve; 8, sunken slurry pool; 9, PH monitor; 10, guide plate. Detailed Implementation Manner

[0022] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1: Please refer to Figures 1-3 Figures 4 and 5. An embodiment provided by the present utility model: A caustic soda dosing device for the slurry pool of a desulfurization tower, which is controlled based on a DCS system and installed on the ground. It includes a conveyor belt 1 on which caustic soda packaging bags are placed. The feeding port 2 of a stirring device 4 is provided at the discharging port of the conveyor belt 1, a cutting device 3 is provided at the feeding port 2, a mixing device 5 is provided at the discharging port of the stirring device 4, and a sunken slurry pool 8 is provided at the discharging port of the mixing device 5.

[0027] The feeding inlet 2 is a trapezoidal trough frame that receives and positions the flake sodium hydroxide packaging bags falling from the conveyor belt 1, ensuring that the bags enter the subsequent processing steps. The trapezoidal trough frame is designed to allow the packaging bags to be stably placed and guided, reducing the possibility of the packaging bags falling or shifting, ensuring the stability and reliability of the system. It is fixedly connected to the top of the stirring device 4 and corresponds to the discharge opening of the conveyor belt 1. A guiding plate 10 is horizontally arranged in the middle of the feeding inlet 2, and the flake sodium hydroxide packaging bags are placed on the guiding plate 10. The guiding plate 10 is triangularly arranged. Cutting devices 3 are connected to the bottom ends of the two inclined ends of the guiding plate 10. The triangular design of the guiding plate 10 enables the packaging bags to be stably placed on it, and the cutting devices 3 are connected to the bottom ends of the two inclined ends, ensuring that the packaging bags can enter the cutting devices 3 at the accurate positions, improving the accuracy and stability of the operation.

[0028] The mixing device 5 includes a mixing tank 501 that accommodates the raw materials to be mixed, provides a working space during the mixing process, and is connected to a water source to mix and stir the raw materials with water. There are also stirring rods 502 and stirring blades 503. A rotating shaft is connected in the middle of the mixing tank 501 to transmit the rotational motion of the third driving motor to the stirring rods 502, enabling them to perform the stirring operation and stir the materials evenly for use. The input shaft of the rotating shaft is connected to the output shaft of the third driving motor. Stirring rods 502 are fixedly connected to both sides of the rotating shaft. The stirring rods 502 are L-shaped, and this L-shaped design enables them to effectively cover all areas inside the mixing tank 501, ensuring the uniformity of mixing. A number of stirring blades 503 are connected to the stirring rods 502. The stirring blades 503 are rectangular groove-shaped blades, and this rectangular groove-shaped design is beneficial for more effectively stirring and pushing the materials, ensuring the thoroughness of mixing. A discharge pipe 6 is flange-connected to the outer circumference of the mixing tank 501 to discharge the mixed materials from the mixing tank 501 into the sunken slurry tank 8.

[0029] There is also a water inlet pipe that is flange-connected to the mixing device 5 and is used to introduce the water or liquid to be processed into the mixing device. A one-way valve is connected to the water inlet pipe to ensure the one-way flow of water and prevent the outflow of the mixed solution. The other end of the discharge pipe 6 is connected to the sunken slurry tank 8. A dosing valve 7 is connected to the discharge pipe 6, and a controller is connected to the dosing valve 7 to control the opening or closing of the valve and control the feeding amount of the mixed medicine. It is controlled based on the DCS system to accurately control the amount of chemical agents added to the mixture, ensuring the accuracy and consistency of the added agents, avoiding overdosage or underdosage, and guaranteeing the product quality and process efficiency.

[0030] A pH monitor 9 is connected to the sunken slurry tank. The top end of the pH monitor 9 extends vertically into the sunken slurry tank 8. A transmitter is also provided on the pH monitor 9 to transmit the pH data inside the sunken slurry tank 8, ensuring that the pH of the mixture is controlled within the required range and guaranteeing the stability of the treatment process and the product quality.

[0031] Example 2: Please refer to Figure 4 , on the basis of Example 1, it further includes the following structure:

[0032] The cutting device 3 includes a housing, a connecting rod 301, a gear 302, a guide frame 303, a moving block 304, and a linkage groove 305. The housing is fixedly connected to the feeding port 2. Guide frames 303 are respectively fixedly connected to the upper and lower ends of the left side of the housing. A pair of connecting rods 301 are hinged on the housing. A pair of gears 302 are arranged on the left side of the connecting rod 301. The gears 302 are meshed with each other. The input shaft of any gear 302 is connected to the output shaft of the first driving motor. The first driving motor drives the gear 302, thereby controlling the movement of the cutting head, improving the degree of automation and the controllability of the operation. A linkage groove 305 is formed on the connecting rod 301. An eccentric rod provided on the gear 302 is slidably fitted in the linkage groove 305. Through the sliding fit of the gear 302 mechanism and the eccentric rod, the offset movement of the cutting head is realized, ensuring the accuracy and stability of the cutting operation. The top end of the connecting rod 301 is hinged with a moving block 304. The moving block 304 is slidably fitted in a chute formed on the guide frame 303. The offset setting of the cutting head and the sliding fit of the moving block 304 ensure the accuracy and consistency of cutting the packaging bag, avoiding incomplete cutting of the flake sodium hydroxide packaging bag during the cutting process, which causes the material to not fall into the feeding port 2. Cutting heads are correspondingly arranged at the contact ends of the two moving blocks 304, and the cutting heads are offset.

[0033] During use, first start the first driving motor. The first driving motor drives the gear 302 to rotate. The two gears 302 are meshed and rotate, driving the eccentric rod to slide in the linkage groove 305, and at the same time driving the connecting rod 301 to move. The connecting rod 301 drives the moving block 304 to slide in the chute on the guide frame 303. While the moving block 304 slides, the cutting head moves up and down to cut both sides of the flake sodium hydroxide packaging bag placed on the guide plate 10 to open the bag, and the material falls into the lower feeding port 2. At the same time, the cutting head is slightly smaller than the width of the flake sodium hydroxide packaging bag and will not completely cut the flake sodium hydroxide packaging bag. Through the specific functions and mutual cooperation of each part, a continuous process from the automatic reception, positioning, and cutting of the flake sodium hydroxide packaging bag to the subsequent mixing process is realized. The advantages include improving the operation accuracy, reducing the need for manual intervention, and at the same time ensuring the improvement of product quality and production efficiency.

[0034] Example 3: Please refer to Figure 6 , on the basis of Examples 1 and 2, it further includes the following structure:

[0035] The stirring device 4 includes a housing that houses the entire stirring device 4 to ensure the sealing and safety during the stirring process, a spiral stirring blade 401, and a second driving motor. The spiral stirring blade 401 is arranged inside the housing. The spiral shape of the spiral stirring blade 401 helps to effectively push and mix the materials, ensuring the uniformity of mixing. The input shaft of the spiral stirring blade 401 is connected to the output shaft of the second driving motor. The top end of the spiral stirring blade 401 is connected to the discharge port of the housing, and the other end is connected to the input shaft. When the second driving motor drives the spiral stirring blade 401 to rotate forward, flaky sodium hydroxide falls into the dissolution and mixing tank through the discharge port; when rotating in reverse, the flaky sodium hydroxide is stirred in the stirring chamber to prevent sodium hydroxide from sticking.

[0036] The stirring device 4 is obliquely arranged for storing materials. At the same time, the oblique design enables more materials to be stored in the stirring device 4 without splashing out during the stirring process.

[0037] The above are only the embodiments of the present invention. Specific structures and common knowledge such as characteristics well known in the art are not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A caustic soda flake dosing device for a desulfurization tower slurry pool, based on DCS system control, installed on the ground, characterized by: The invention comprises a conveyor belt (1), a flake sodium hydroxide packaging bag is placed on the conveyor belt (1), an inlet (2) of a stirring device (4) arranged at the discharge port of the conveyor belt (1), a cutting device (3) arranged at the inlet (2), a mixing device (5) arranged at the discharge port of the stirring device (4), and a sunken slurry pool (8) arranged at the discharge port of the mixing device (5). The feed inlet (2) is a trapezoidal trough frame, fixedly connected to the top of the stirring device (4) and corresponding to the feed outlet of the conveyor belt (1). A guide plate (10) is horizontally arranged in the middle of the feed inlet (2), and a sheet-shaped sodium hydroxide packaging bag is placed on the guide plate (10). The guide plate (10) is arranged in a triangular shape, and the bottom ends of the two oblique ends of the guide plate (10) are connected to the cutting device (3). The cutting device (3) comprises a housing, a connecting rod (301), a gear (302), a guide frame (303), a moving block (304), and a linkage groove (305). The housing is fixedly connected to the feed port (2). The left end of the housing is fixedly connected to the guide frame (303) at the upper and lower ends, respectively. A pair of connecting rods (301) is hingedly connected to the housing. A pair of gears (302) is arranged on the left side of the connecting rod (301). The gears (302) are meshed with each other. The input shaft of any gear (302) is connected to the output shaft of the first drive motor. A linkage groove (305) is provided on the connecting rod (301). An eccentric rod arranged on the gear (302) is slidably engaged in the linkage groove (305). A moving block (304) is hingedly connected to the top end of the connecting rod (301). The moving block (304) is slidably engaged in a slide groove provided on the guide frame (303). Cutting heads are arranged correspondingly at the contact ends of the two moving blocks (304), and the cutting heads are arranged in a staggered manner.

2. The desulfurization tower slurry pool caustic soda dosing device according to claim 1 is characterized in that: The stirring device (4) comprises a containing shell, a spiral stirring blade (401), and a second driving motor. The containing shell is provided with a spiral stirring blade (401), an input shaft of the spiral stirring blade (401) is connected to an output shaft of the second driving motor, a top end of the spiral stirring blade (401) is connected to a material outlet of the containing shell, and the other end is connected to the input shaft.

3. The caustic soda flake dosing device for desulfurization tower slurry pool according to claim 1 is characterized in that: The mixing device (5) comprises a mixing tank (501), a stirring rod (502), and stirring blades (503); a rotating shaft is connected to the middle of the mixing tank (501); the rotating shaft input shaft is connected to the output shaft of the third drive motor; stirring rods (502) are fixedly connected to both sides of the rotating shaft; the stirring rods (502) are arranged in an L shape; a plurality of stirring blades (503) are connected to the stirring rods (502); the stirring blades (503) are rectangular groove blades; and a discharge pipe (6) is flange-connected to the outer circumference of the mixing tank (501).

4. The desulfurization tower slurry pool caustic soda dosing device according to claim 3 is characterized in that: It also includes a water inlet pipe, which is flange-connected to the mixing device (5) and is connected to a one-way valve.

5. The desulfurization tower slurry pool caustic soda dosing device according to claim 3 is characterized in that: The other end of the discharge pipe (6) is connected to the sinking slurry pool (8), and the discharge pipe (6) is connected to a dosing valve (7). The dosing valve (7) is connected to a controller for controlling the valve to open or close, thereby controlling the feed amount of the mixed medicine.

6. The caustic soda flake dosing device for the desulfurization tower slurry pool according to claim 5 is characterized in that: The sinking slurry pool is connected to a pH monitor (9), the top end of which hangs down into the sinking slurry pool (8). The pH monitor (9) is also provided with a transmitter for transmitting pH data in the sinking slurry pool (8).

7. The caustic soda flake dosing device for the desulfurization tower slurry pool according to claim 2 is characterized in that: The stirring device (4) is arranged obliquely and is used to store materials.

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