Water vapor-containing gelled wet powder dust removal equipment and water vapor-containing gelled wet powder dust removal method

Abstract

Gelling wet powder dust removal equipment with water vapor comprises a stirring tank and a plate type dust remover body, a cement feeding pipe, an aluminum powder feeding pipe, a mixed material feeding pipe and a dust removal fixing pipe are installed on the stirring tank, the dust removal fixing pipe is sleeved with an exhaust cloth bag, a dust removal connecting pipe is arranged on the outer side of the exhaust cloth bag, and the exhaust cloth bag is installed on the inner side of the dust removal connecting pipe; the top of the dust removal connecting pipe is provided with a dust suction pipe, the dust suction pipe is communicated with the plate-type dust remover main body, the detachable air exhaust cloth bag is arranged, in the dust removal stage, the air exhaust cloth bag ensures efficient suction of dust, in the stirring stage, the air exhaust cloth bag provides a discharge channel for water vapor, filter plate condensation, hardening and blockage are prevented, and in the discharging stage, the dust removal efficiency is improved. External air can be supplemented into the stirring tank through the air exhaust cloth bag, negative pressure is eliminated, and smooth discharging and stable production rhythm are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of aerated concrete production technology, and in particular to a dust removal device and method for wet aerated concrete powder containing water vapor. Background Technology

[0002] Autoclaved aerated concrete (AAC) is a lightweight, porous building material made primarily from siliceous materials (such as fly ash and sand) and calcareous materials (such as cement and lime). It is cured by high-temperature and high-pressure steam, and its interior forms uniform and tiny closed pores through a gas-generating reaction. As a result, it has advantages such as light weight, good thermal insulation, high fire resistance, and strong workability (it can be sawed and nailed).

[0003] In the raw material mixing stage of aerated concrete production, mixing tanks are often used to mix various raw materials evenly. Since the various raw materials entering the mixing tank generate a large amount of dust, this dust can severely pollute the working environment, especially in uncovered mixing tanks. For covered mixing tanks, dust removal equipment needs to be connected to the outside to remove the dust while ensuring the mixing tank is connected to the outside environment for smooth feeding. However, quicklime is a commonly used raw material in aerated concrete, and quicklime produces a large amount of water vapor when it comes into contact with water. Therefore, it is necessary to close the valves on the pipeline between the dust removal equipment and the mixing tank to prevent blockage of the dust removal equipment. Because the mixing tank is a closed space, closing all valves will cause the internal temperature and pressure to rise, making it impossible to discharge material during the discharge stage after cooling. Therefore, to solve the above problems, a dust removal device and method for aerated concrete wet powder with water vapor is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dust removal device and method for agglomerated wet powder containing water vapor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wet powder dust removal device with water vapor, comprising a mixing tank and a plate dust collector body, characterized in that the mixing tank is equipped with a cement feed pipe, an aluminum powder feed pipe, a mixing feed pipe and a dust removal fixing pipe, an exhaust bag is sleeved on the outside of the dust removal fixing pipe, a dust removal connecting pipe is provided on the outside of the exhaust bag, the exhaust bag is installed on the inside of the dust removal connecting pipe, a suction pipe is installed on the top of the dust removal connecting pipe, and the suction pipe is interconnected with the plate dust collector body.

[0006] The above technical solution further includes: The mixing tank is provided with support legs at equal intervals on its outer circumference. A weighing sensor is installed between the mixing tank and the support legs. A stirring motor is installed on the top of the mixing tank. A discharge port is installed through the bottom of the mixing tank. A discharge valve is installed on the discharge port.

[0007] A first connecting flange is installed between the dust removal connecting pipe and the dust suction pipe, and a butterfly valve is installed on the outside of the dust removal connecting pipe.

[0008] The plate dust collector body is symmetrically and fixedly connected with filter plates. The two filter plates divide the plate dust collector body into three chambers: a first chamber, a second chamber, and a third chamber. An air inlet pipe is installed through the side of the plate dust collector body located in the first chamber. A second connecting flange is fixedly installed between the dust suction pipe and the air inlet pipe.

[0009] Three ash hoppers are fixedly installed at the bottom of the main body of the plate dust collector. A star-shaped air shut-off valve is installed inside the ash hopper. An air outlet pipe is installed through the side of the main body of the plate dust collector located in the first chamber.

[0010] A gap is left between the exhaust bag and the dust collection connecting pipe to allow the exhaust bag to expand or contract, and the exhaust bag allows dust to pass through.

[0011] The inner side of the exhaust bag 18 is equipped with a mesh cage, which is welded and fixed to the dust removal fixed pipe at the contact point.

[0012] The open end of the exhaust bag is fitted onto the outside of the dust removal fixed pipe, and a clamp is installed on the outside of the contact point between the exhaust bag and the dust removal fixed pipe.

[0013] A method for dust removal of a gelled wet powder containing moisture includes the following steps: S1: First, the raw materials are mixed. Cement is introduced into the cement feed pipe, aluminum powder into the aluminum powder feed pipe, and slurry, waste slurry, water and quicklime into the mixing feed pipe. At the same time, the mixing motor works to stir the mixture in the mixing tank. The weight of the mixture in the mixing tank is measured by the weighing sensor. After the predetermined weight is reached, the feeding of various raw materials is stopped. S2: During the process of feeding each raw material into the mixing tank, the butterfly valve needs to be opened and the plate dust collector body needs to be started. The dust in the mixing tank is sucked away from the dust collection fixed pipe through the plate dust collector body and flows through the exhaust bag, dust collection connecting pipe and dust suction pipe into the plate dust collector body for dust removal. During this process, the exhaust bag is compressed and bulged under the negative pressure generated by the suction of the plate dust collector body. After each raw material in the mixing tank reaches the predetermined weight, the plate dust collector body performs a back-blowing and then stops working, blowing off the dust on the filter plate and the exhaust bag. Then the butterfly valve is closed, and the exhaust bag returns to its natural state. S3: During the mixing process of the mixing motor in the mixing tank, a large amount of water vapor is generated due to the reaction of limestone and water. At this time, the aluminum powder feed pipe, the mixing feed pipe and the cement feed pipe are all closed, and the space inside the mixing tank is relatively closed. The water vapor enters the exhaust bag through the dust removal fixed pipe. At this time, the exhaust bag expands and is discharged from the gap between the dust removal connecting pipe and the exhaust bag. The mixture in the mixing tank is evenly mixed, and after the mixing tank cools to a certain temperature, the discharge valve is opened. Since the mixing tank is connected to the outside through the exhaust bag to ensure consistent pressure, it is convenient for the concrete slurry after mixing to be discharged from the discharge port. This is a dust removal device for cementitious wet powder with water vapor.

[0014] The present invention has the following beneficial effects: In this invention, during the dust removal stage, the exhaust filter bag contracts under negative pressure to ensure efficient dust intake; during the mixing stage, the exhaust filter bag provides an exhaust channel for water vapor, preventing water vapor from carrying wet powder into the main body of the plate dust collector, thus fundamentally preventing condensation, caking, and clogging of the filter plate.

[0015] In this invention, after the butterfly valve is closed to isolate the main body of the plate dust collector, the water vapor generated in the mixing tank can be smoothly discharged through the loose cloth bag and the gap between it and the sleeve, avoiding the pressure rise caused by the seal. During cooling, the external air can be replenished through this channel to eliminate the negative pressure, thereby completely solving the core pain point of difficult material discharge caused by pressure, ensuring smooth material unloading and stable production rhythm. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a wet powder dust removal device with water vapor proposed in this invention. Figure 2 This is a schematic diagram of the main structure of the plate dust collector in this invention; Figure 3 This is a schematic diagram of the mixing tank structure in this invention; Figure 4 This is a schematic diagram of the internal structure of the mixing tank in this invention; Figure 5 This is a schematic diagram of the internal structure of the plate dust collector in this invention; Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point A in the middle.

[0017] In the diagram: 1. Mixing tank; 2. Plate dust collector body; 102. Suction pipe; 10. Support leg; 11. Weighing sensor; 12. Cement feed pipe; 13. Aluminum powder feed pipe; 14. Mixing feed pipe; 15. Butterfly valve; 17. Dust collector connecting pipe; 18. Exhaust bag; 19. Mixing motor; 110. First connecting flange; 111. Dust collector fixing pipe; 112. Clamp; 113. Wire mesh cage; 114. Discharge port; 115. Discharge valve; 20. Air outlet pipe; 21. Ash hopper; 22. Rotary rotary valve; 23. Air inlet pipe; 24. Second connecting flange; 25. First chamber; 250. Second chamber; 251. Third chamber; 26. Filter plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 like Figures 1-6 As shown, the present invention proposes a wet powder dust removal device with water vapor, including a mixing tank 1 and a plate dust collector body 2. The mixing tank 1 is equipped with a cement feed pipe 12, an aluminum powder feed pipe 13, a mixing feed pipe 14, and a dust removal fixed pipe 111. An exhaust bag 18 is sleeved on the outside of the dust removal fixed pipe 111, and a dust removal connecting pipe 17 is provided on the outside of the exhaust bag 18. The exhaust bag 18 is installed on the inside of the dust removal connecting pipe 17. A suction pipe 102 is installed on the top of the dust removal connecting pipe 17, and the suction pipe 102 is interconnected with the plate dust collector body 2.

[0020] Example 2 like Figures 3-4 , Figure 6 As shown, support legs 10 are equidistantly arranged on the outer circumference of the mixing tank 1. A weighing sensor 11 is installed between the mixing tank 1 and the support legs 10. A stirring motor 19 is installed on the top of the mixing tank 1. A discharge port 114 is installed through the bottom of the mixing tank 1. A discharge valve 115 is installed on the discharge port 114.

[0021] A first connecting flange 110 is installed between the dust removal connecting pipe 17 and the dust suction pipe 102, and a butterfly valve 15 is installed on the outside of the dust removal connecting pipe 17.

[0022] A gap is left between the exhaust bag 18 and the dust collection connecting pipe 17 to allow the exhaust bag 18 to expand or contract, allowing dust to pass through.

[0023] A mesh cage 113 is provided on the inner side of the exhaust bag 18, and the mesh cage 113 is welded and fixed to the dust removal fixed pipe 111 at the contact point.

[0024] The open end of the exhaust bag 18 is fitted onto the outside of the dust removal fixed pipe 111, and a clamp 112 is installed on the outside of the contact point between the exhaust bag 18 and the dust removal fixed pipe 111.

[0025] Based on Embodiment 1, in this embodiment, cement and aluminum powder are first fed into the mixing tank 1 through the cement feed pipe 12 and the aluminum powder feed pipe 13, and slurry, waste slurry, water and quicklime are fed into the mixing tank 1 through the mixing feed pipe 14. During this process, the weighing sensor 11 monitors the weight of the materials in the mixing tank 1 in real time, and it is necessary to weigh the raw material bins corresponding to each type of raw material in order to determine the proportion of each type of raw material. Feeding is stopped after the preset value is reached. Furthermore, during feeding, the butterfly valve 15 is opened, the plate dust collector body 2 is started, and under the action of negative pressure suction, the dust in the mixing tank 1 is sucked in through the dust removal fixed pipe 111, and then passes through the exhaust bag 18, the dust removal connecting pipe 17 and the dust suction pipe 102 in sequence, and finally enters the plate dust collector body 2 through the air inlet pipe 23. Furthermore, staff can use the observation port on the main body 2 of the plate dust collector to determine whether there is still a large amount of dust in the mixing tank 1. After the dust removal is completed, the butterfly valve 15 is closed, the exhaust bag 18 returns to its natural state, and then the mixing motor 19 starts mixing. The raw materials begin to mix, and quicklime reacts with water to produce a large amount of water vapor. At this time, all feed pipes are closed, and a closed space is formed in the mixing tank 1. The water vapor enters the exhaust bag 18 through the dust removal fixed pipe 111 and expands. The water vapor is then discharged to the outside environment through the gap between the exhaust bag 18 and the dust removal connecting pipe 17, thereby releasing the pressure in the mixing tank 1. Furthermore, after the mixing is completed and the mixing tank 1 has cooled down, the exhaust bag 18 continuously ventilates with the outside to ensure the internal and external pressure balance. At this time, the discharge valve 115 is opened, and the mixed slurry can be smoothly discharged from the discharge port 114, avoiding discharge obstacles caused by pressure imbalance.

[0026] Furthermore, for the disassembly and assembly of the exhaust bag 18, simply loosen the connecting bolts on the first connecting flange 110, remove the dust removal connecting pipe 17, then loosen the clamp 112, put the new exhaust bag 18 on the mesh cage 113, install the clamp 112, and finally install the dust removal connecting pipe 17 on the bottom suction pipe 102 and tighten the bolts on the first connecting flange 110.

[0027] Example 3 like Figure 2 and Figure 5As shown, filter plates 26 are symmetrically fixedly connected inside the plate dust collector body 2. The two filter plates 26 divide the plate dust collector body 2 into three chambers: a first chamber 25, a second chamber 250, and a third chamber 251. An air inlet pipe 23 is installed through the side of the plate dust collector body 2 in the first chamber 25. A second connecting flange 24 is fixedly installed between the dust suction pipe 102 and the air inlet pipe 23.

[0028] Three ash hoppers 21 are fixedly installed at the bottom of the plate dust collector body 2. A star-shaped air shut-off valve 22 is installed inside the ash hopper 21. An exhaust pipe 20 is installed through the side of the first chamber 25 of the plate dust collector body 2.

[0029] Based on the above embodiments, in this embodiment, the dust-laden airflow passes sequentially through the first chamber 25, the second chamber 250, and the third chamber 251 within the plate dust collector body 2, and is intercepted and captured by the filter plate 26. The purified gas is discharged through the outlet pipe 20, and the captured dust falls into the ash hopper 21 and is discharged through the star-shaped shut-off valve 22. During this process, the exhaust bag 18 shrinks and adheres to the wire mesh cage 113 under negative pressure. After feeding is completed, the plate dust collector body 2 undergoes back-blowing cleaning to shake off the dust adhering to the filter plate 26 and the exhaust bag 18. The fallen dust is collected in the ash hopper 21 and finally discharged through the star-shaped shut-off valve 22.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust removal device for a gelled wet powder containing water vapor, comprising a mixing tank (1) and a plate dust collector body (2), characterized in that, The mixing tank (1) is equipped with a cement feed pipe (12), an aluminum powder feed pipe (13), a mixing feed pipe (14), and a dust removal fixed pipe (111). An exhaust bag (18) is fitted on the outside of the dust removal fixed pipe (111). A dust removal connecting pipe (17) is provided on the outside of the exhaust bag (18). The exhaust bag (18) is installed on the inside of the dust removal connecting pipe (17). A dust suction pipe (102) is installed on the top of the dust removal connecting pipe (17). The dust suction pipe (102) is connected to the plate dust collector body (2).

2. The dust removal equipment for gelled wet powder with moisture as described in claim 1, characterized in that, Support legs (10) are equidistantly arranged on the outer circumference of the mixing tank (1). A weighing sensor (11) is installed between the mixing tank (1) and the support legs (10). A stirring motor (19) is installed on the top of the mixing tank (1). A discharge port (114) is installed through the bottom of the mixing tank (1). A discharge valve (115) is installed on the discharge port (114).

3. The wet dust removal equipment for gelled powder with moisture as described in claim 1, characterized in that, A first connecting flange (110) is installed between the dust removal connecting pipe (17) and the dust suction pipe (102), and a butterfly valve (15) is installed on the outside of the dust removal connecting pipe (17).

4. The wet dust removal equipment for gelled powder with moisture as described in claim 1, characterized in that, The plate dust collector body (2) is symmetrically fixedly connected with filter plates (26). The two filter plates (26) divide the plate dust collector body (2) into three chambers: a first chamber (25), a second chamber (250), and a third chamber (251). An air inlet pipe (23) is installed through the side of the plate dust collector body (2) in the first chamber (25). A second connecting flange (24) is fixedly installed between the dust suction pipe (102) and the air inlet pipe (23).

5. The wet dust removal equipment for gelled powder with water vapor according to claim 4, characterized in that, Three ash hoppers (21) are fixedly installed at the bottom of the plate dust collector body (2). A star-shaped air shut-off valve (22) is installed inside the ash hopper (21). An exhaust pipe (20) is installed through the side of the plate dust collector body (2) located in the first chamber (25).

6. The wet dust removal equipment for gelled powder with moisture as described in claim 1, characterized in that, A gap is left between the exhaust bag (18) and the dust removal connecting pipe (17) for the exhaust bag (18) to expand or contract, and the exhaust bag (18) allows dust to pass through.

7. The dust removal equipment for gelled wet powder with water vapor according to claim 1, characterized in that, A mesh cage (113) is provided on the inner side of the exhaust bag (18), and the mesh cage (113) is welded and fixed at the contact point with the dust removal fixed pipe (111).

8. The dust removal equipment for gelled wet powder with water vapor according to claim 1, characterized in that, The open end of the exhaust bag (18) is fitted onto the outside of the dust removal fixed pipe (111), and a clamp (112) is installed on the outside of the contact point between the exhaust bag (18) and the dust removal fixed pipe (111).

9. A method for dust removal of a gelled wet powder containing moisture, characterized in that, Includes the following steps: S1: First, the raw materials are mixed. Cement is introduced into the cement feed pipe (12), aluminum powder is introduced into the aluminum powder feed pipe (13), and slurry, waste slurry, water and quicklime are introduced into the mixing feed pipe (14). At the same time, the stirring motor (19) works to stir the mixture in the mixing tank (1). The weight of the mixture in the mixing tank (1) is measured by the weighing sensor (11). After the predetermined weight is reached, the feeding of various raw materials is stopped. S2: During the process of feeding each raw material into the mixing tank (1), the butterfly valve (15) needs to be opened and the plate dust collector body (2) needs to be started. The dust in the mixing tank (1) is sucked away from the dust removal fixed pipe (111) through the plate dust collector body (2), and flows through the exhaust bag (18), dust removal connecting pipe (17) and dust suction pipe (102) into the plate dust collector body (2) for dust removal. During this process, the exhaust bag (18) shrinks and becomes slack under the negative pressure generated by the suction of the plate dust collector body (2). After each raw material in the mixing tank (1) reaches the predetermined weight, the plate dust collector body (2) stops working after a back-blowing, blowing off the dust on the filter plate (26) and the exhaust bag (18). Then the butterfly valve (15) is closed, and the exhaust bag (18) returns to its natural state. S3: During the mixing process of the mixing motor (19) in the mixing tank (1), a large amount of water vapor is generated due to the reaction of limestone and water. At this time, the aluminum powder feed pipe (13), the mixing feed pipe (14) and the cement feed pipe (12) are all closed. The space inside the mixing tank (1) is relatively closed. The water vapor enters the exhaust bag (18) through the dust removal fixed pipe (111). At this time, the exhaust bag (18) expands and is discharged from the gap between the dust removal connecting pipe (17) and the exhaust bag (18). The mixing in the mixing tank (1) is uniform. After the mixing tank (1) is cooled to a certain temperature, the discharge valve (115) is opened. Since the mixing tank (1) is connected to the outside through the exhaust bag (18) to ensure consistent pressure, it is convenient for the concrete slurry after mixing to be discharged from the discharge port (114).

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