A spray insulation dry sludge silo

Abstract

The present invention aims to disclose a spray-insulated dry sludge silo to solve the problems of dry sludge moisture resorption and smoke backflow. A spray-insulated dry sludge silo includes a silo body, characterized in that a sludge inlet is provided on the front side of the top wall of the silo body, a sludge outlet is provided on the rear side of the bottom wall, a power air inlet is provided on the front side wall, a power air outlet is provided on the rear side wall, and a spray insulation module is provided on the left and right side walls respectively. The spray insulation module includes a cover shell, which is fixedly connected to the left or right side wall of the silo body. The cover shell is divided into a static pressure chamber and a spray chamber by a vertical partition. The static pressure chamber is located outside the spray chamber. The partition is uniformly provided with first air holes connecting the static pressure chamber and the spray chamber. The partition is located on one side of the spray chamber and is provided with a nozzle that is connected to the first air holes in a one-to-one correspondence. The top wall of the static pressure chamber is provided with a hot medium inlet, and the bottom wall of the spray chamber is provided with a hot medium outlet. The silo body is provided with baffles, which are distributed on the inner side of the top wall and the inner side of the bottom wall, and each baffle is arranged obliquely and staggered.

Description

Technical Field

[0001] The invention relates to a spray heat-insulating dry sludge silo and belongs to the field of municipal sludge treatment. Background Art

[0002] In the existing municipal sludge resource recovery industry, ensuring stable and uniform feeding of materials into the furnace is crucial to ensuring proper system operation. However, in actual operation, due to the fluidized bed process and operator control, when transient positive pressure occurs at the furnace feed inlet, it can cause flue gas to flow back through the inlet, severely impacting system balance and leading to substandard emissions and moisture resorption in the dry material silo.

[0003] Existing patents do not yet describe a sludge drying silo specifically designed for self-sustaining municipal sludge incineration. This work aims to develop a spray-insulated drying silo by utilizing secondary drying media (steam and thermal oil) and innovating the internal structure of the silo. This approach aims to provide a new silo design specifically for self-sustaining municipal sludge incineration, enriching the field of municipal sludge treatment engineering applications.

[0004] Spray heat exchange has a high convective heat transfer coefficient and uniform heat transfer characteristics. This technology is applied to the optimization of dry material tanks, providing reference and design ideas for technicians in related fields. Summary of the Invention

[0005] The invention aims to disclose a spray-insulated dry sludge silo to solve the problems of dry sludge moisture reversion and smoke backflow.

[0006] The technical solution is as follows: a spray-insulated dry sludge silo comprises a silo body, characterized in that the main body of the silo body is a rectangular parallelepiped structure, the front side of the top wall of the silo body is provided with a sludge inlet, the rear side of the bottom wall is provided with a sludge outlet, the front side wall is provided with a powered air inlet, the rear side wall is provided with a powered air outlet, and the left and right side walls are respectively provided with a spray insulation module, the spray insulation module comprises a cover shell, the cover shell is fixedly connected to the left side wall or the right side wall of the silo body, the cover shell is divided into a static pressure chamber and a spray chamber by a vertical partition, the static pressure chamber is located outside the spray chamber, the partition is evenly distributed with first air holes connecting the static pressure chamber and the spray chamber, the partition is located on one side of the spray chamber and is provided with a nozzle that is connected to the first air hole in a one-to-one correspondence, the top wall of the static pressure chamber is provided with a hot working medium inlet, and the bottom wall of the spray chamber is provided with a hot working medium outlet;

[0007] The silo body is provided with baffles, which are distributed on the inner sides of the top wall and the bottom wall, and each of the baffles is tilted and staggered.

[0008] Furthermore, the powered air inlet and the powered air outlet are both located at the bottom of the corresponding side walls.

[0009] Furthermore, the power air flow directions of the spray insulation modules on both sides are arranged in opposite directions.

[0010] Furthermore, the side of the cover shell adjacent to the bin body is sealed by a side wall of the bin body.

[0011] Furthermore, a cylinder is provided on the outside of the static pressure chamber and a sealing plate is provided on the inside. The cylinder is fixed to the outer wall of the warehouse body. The piston rod of the cylinder is connected to the sealing plate. The sealing plate is provided with second air holes corresponding to the first air holes one by one. The sealing plate is sealed with the partition and can translate in the front-back direction under the action of the cylinder.

[0012] The present invention has the following beneficial effects:

[0013] The dried sludge falls into the dry material silo from the dry material inlet under the action of gravity. Compressed air is then blown evenly through the baffle plate to the dry material outlet through the power air inlet. At the same time, under the action of external pressure, the hot working medium flows from the hot working medium inlet into the static pressure chamber. When the pressure in the static pressure chamber is stable, the hot working medium is evenly sprayed into the spray chamber through the nozzles distributed on the baffle plate. At this time, the atomized hot working medium hits the surface of the dry material silo, playing a role in heat preservation and heating. After a period of heat exchange, the atomized hot working medium condenses into water and then flows out of the hot working medium outlet on the side of the spray chamber. Through the above process, the dry sludge silo is kept warm and heated. At the same time, the baffle plate can effectively prevent the flue gas from flowing back into the dryer through the silo.

[0014] The spray insulation module uses the atomized spray heat exchange of the working fluid under high pressure. When the working fluid is atomized into small droplets moving at high speed, it hits the surface of the dry material cabin for violent flow heat exchange, which improves the heat exchange efficiency more efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axial side schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the main structure of the present invention.

[0017] Figure 3 The present invention corresponds to Figure 2 Schematic diagram of the AA structure.

[0018] Figure 4 The present invention corresponds to Figure 2 Schematic diagram of the BB structure.

[0019] Figure 5 for Figure 4 Schematic diagram of the structure after partial enlargement of point C in the middle. DETAILED DESCRIPTION

[0020] like Figures 1 to 5 As shown, a spray insulation dry sludge silo includes a silo body 1, which is a rectangular structure. A sludge inlet 1-1 is provided on the front side of the top wall of the silo body 1, a sludge outlet 1-2 is provided on the rear side of the bottom wall, a power air inlet 1-3 is provided at the bottom of the front side wall, a power air outlet 1-4 is provided at the bottom of the rear side wall, and a spray insulation module 2 is provided on the left and right side walls respectively. The spray insulation module 2 includes a cover shell, and the cover shell is fixedly connected to the left side wall or the right side wall of the silo body 1. Specifically, the side of the cover shell adjacent to the silo body 1 is sealed by the side wall of the silo body, and the inside of the cover shell is divided into a static pressure chamber 2-3 and a spray chamber 2-5 by a vertical partition 2-6. The static pressure chamber 2-3 is located outside the spray chamber 2-5, and the partition 2-6 is evenly distributed with first air holes 2-8 connecting the static pressure chamber 2-3 and the spray chamber 2-5. The partition 2-6 is located A nozzle 2-4 is provided on one side of the spray chamber 2-5, which is connected to the first air hole in a one-to-one correspondence. A hot medium inlet 2-1 is provided on the top wall of the static pressure chamber 2-3, and a hot medium outlet 2-2 is provided on the bottom wall of the spray chamber 2-5. The power air flow directions of the spray insulation modules 2 on both sides are set in opposite directions, that is, countercurrent heat exchange is adopted, and the heat exchange effect is good; a baffle 1-5 is provided in the warehouse body 1, and the two baffles 1-5 are distributed on the inner side of the top wall and the inner side of the bottom wall of the spray chamber 2-5. Among them, the baffle connected to the bottom wall is shorter than the baffle connected to the top wall. On the basis of preventing smoke backflow, it is also necessary to ensure that the dry sludge can smoothly pass through the baffle connected to the bottom wall under the blowing of compressed air. Each baffle 1-5 is tilted and staggered (that is, the two adjacent baffles above and below are not located on the same plane).

[0021] The static pressure chamber is provided with a cylinder (not shown) on the outside and a sealing plate 2-7 on the inside. The cylinder is fixed to the outer wall of the chamber body 1, and the piston rod of the cylinder is connected to the sealing plate 2-7. The sealing plate 2-7 is provided with second air holes 2-9 corresponding one-to-one with the first air holes 2-8. The sealing plate 2-7 is sealed against the partition 2-6 and can be translated in the front-to-back direction under the action of the cylinder. Preferably, a sealing ring is provided at the end where the first air holes and the second air holes 2-9 are connected to ensure a seal at the connection between the two. Before the pressure in the static pressure chamber 2-3 stabilizes, the rows of second air holes in the sealing plate are staggered with the rows of first air holes in the partition 2-6 to achieve sealing of the first air holes. After the pressure in the static pressure chamber 2-3 stabilizes, the sealing plate is pushed by the cylinder to move, so that the second air holes and the first air holes are directly connected. Alternatively, a gas passage can be provided in the partition 2-6 to connect with each nozzle 2-4, and a valve can be provided at the entrance of the gas passage to replace the sealing plate and cylinder.

Claims

1. A spray insulation dry sludge silo, comprising a silo body, characterized in that: The main body of the silo is a rectangular structure, a sludge inlet is provided on the front side of the top wall of the silo, a sludge outlet is provided on the rear side of the bottom wall, a powered air inlet is provided on the front side wall, a powered air outlet is provided on the rear side wall, and a spray insulation module is provided on the left and right side walls respectively, and the spray insulation module includes a cover shell, the cover shell is fixedly connected to the left wall or the right wall of the silo, and the cover shell is divided into a static pressure chamber and a spray chamber by a vertical partition, the static pressure chamber is located outside the spray chamber, the partition is evenly distributed with first air holes connecting the static pressure chamber and the spray chamber, the partition is located on one side of the spray chamber and is provided with a nozzle that is connected to the first air hole in a one-to-one correspondence, the top wall of the static pressure chamber is provided with a hot working medium inlet, and the bottom wall of the spray chamber is provided with a hot working medium outlet; The silo body is provided with baffles, which are distributed on the inner sides of the top wall and the bottom wall, and each of the baffles is tilted and staggered.

2. The spray-insulated dry sludge silo according to claim 1, characterized in that: The side of the cover shell adjacent to the bin body is sealed by the side wall of the bin body.

3. The spray-insulated dry sludge silo according to claim 2, characterized in that: The power air flow directions of the spray insulation modules on both sides are arranged in opposite directions.

4. The spray-insulated dry sludge silo according to claim 3, characterized in that: The power air inlet and the power air outlet are both located at the bottom of the corresponding side wall.

5. The spray-insulated dry sludge silo according to claim 4, characterized in that: A cylinder is provided on the outside of the static pressure chamber and a sealing plate is provided on the inside. The cylinder is fixed to the outer wall of the warehouse body. The piston rod of the cylinder is connected to the sealing plate. The sealing plate is provided with second air holes corresponding to the first air holes one by one. The sealing plate is sealed with the partition and can be translated in the front and rear directions under the action of the cylinder.

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