Transpiration drying equipment

Abstract

The utility model discloses transpiration drying equipment which comprises a drying machine body, a dust cover, an exhaust fan, a primary water curtain dust remover and a secondary dust remover, the two ends of the drying machine body are provided with a feeding port and a discharging port respectively, the dust cover is arranged at the upper end of the drying machine body, a first-stage water curtain dust remover is arranged on the outer side wall close to the discharging port, the first-stage water curtain dust remover is communicated with the dust cover and the exhaust fan respectively, and the exhaust fan is connected with a second-stage dust remover. According to the utility model, the first-stage water curtain dust remover and the second-stage dust remover are combined for use, high-temperature and high-humidity dust-containing gas at the front end is pumped to the first-stage water curtain dust remover through the exhaust fan, and the high-temperature and high-humidity dust-containing gas is subjected to dust removal and cooling by utilizing a water curtain, so that the dust content in the gas is reduced, and the dust removal efficiency is improved; and adverse effects caused by blockage of the filter bag due to a large amount of dust-containing gas can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of drying machines, in particular to transpiration drying equipment. Background Art

[0002] The moisture content of discarded wet solid waste is generally about 20% or even higher, and it cannot be used directly. For example, industrial gypsum (including phosphogypsum, titanium gypsum, desulfurized gypsum, etc.), sludge, alkali slag, etc. need to be dried before they can be reused. Traditional drying processes include drying and baking, but traditional processes have many disadvantages. At present, calcium oxide is generally added as a drying agent to the wet solid waste to remove moisture from the wet solid waste.

[0003] However, when adding calcium oxide to the wet solid waste to remove moisture, a mixer or a blender is usually used to fully mix quicklime and the wet solid waste. During the mixing process, a large amount of quicklime is directly mixed with the wet solid waste, and the quicklime quickly heats up when it meets water, producing a large amount of high-temperature and high-humidity dust-containing gas. At present, evaporative dryers generally use bag dust collectors for dust removal when in use, but the filter bags are covered with wet dust in a short period of time, which will affect the dust removal efficiency and quality of the filter bags; moreover, clogging of the filter bags will cause the internal pressure of the equipment to increase rapidly, and it is difficult to discharge the high-temperature and high-humidity dust-containing gas in time, which will cause the high-temperature and high-humidity dust-containing gas to accumulate and increase in pressure in the equipment, which is prone to explosion risks. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a transpiration drying equipment, including a dryer body, a dust cover, an exhaust fan, a first-level water curtain dust collector and a second-level dust collector; a feed port and a discharge port are respectively provided at both ends of the dryer body, the dust cover is arranged at the upper end of the dryer body, and a first-level water curtain dust collector is arranged at the end close to the discharge port, the first-level water curtain dust collector is respectively connected to the dust cover and the exhaust fan, and the exhaust fan is connected to the second-level dust collector.

[0005] Preferably: the inner walls at the bottom ends of both sides of the dust cover are provided with return water grooves, and part of the high-temperature and high-humidity dust-containing gas condenses in contact with the inner walls of the dust cover, and the condensed water flows into the return water grooves along the inner walls of the dust cover.

[0006] Preferably: the dust cover comprises a first cover body, a second cover body and a third cover body which are arranged in sequence along the forward direction of the material; the first-level water curtain dust collector is arranged on the third cover body; the second cover body is provided with a flexible breathing cover for replenishing air into the dust cover when the exhaust fan is working.

[0007] Preferably: the transpiration drying equipment further includes a variable cross-section ventilation pipe;

[0008] The first-stage water curtain dust collector includes a filter cover, a water pipe and a drainage pipe;

[0009] The filter cover is fixed on the side wall or the top wall of the third cover body, the filter cover is connected with the third cover body through the wall close to the third cover body, and is connected with the ventilation pipe air inlet of the variable cross-section ventilation pipe through other walls, and the ventilation pipe air outlet is connected with the air inlet of the exhaust fan;

[0010] The water pipe is located inside the filter cover and extends along the length direction of the filter cover, and is used to spray water on the high-temperature and high-humidity dust-containing gas flowing into the filter cover to remove dust and reduce the temperature.

[0011] Preferably, the water delivery pipe is located at the top of the filter cover.

[0012] Preferably, the filter cover is fixed on the side wall of the third cover body, the filter cover is connected to the third cover body at the top or bottom of one side wall close to the third cover body, and is connected to the ventilation pipe air inlet of the variable cross-section ventilation pipe at the bottom or top of the other side wall;

[0013] Alternatively, the filter cover is fixed on the top wall of the third cover body, the bottom wall of the filter cover is connected to the third cover body, and the upper side wall or the top wall is connected to the ventilation pipe air inlet of the variable-section ventilation pipe.

[0014] Preferably: the first-stage water curtain dust collector further comprises a sedimentation water tank, a water pump and a water inlet pipe, the two ends of the water inlet pipe are respectively connected to the water pump and the water pipe, and a spray port is opened on the pipe wall of the water pipe.

[0015] Preferably, the spray port is a long strip through hole opened in the wall of the water pipe, or a plurality of circular or square through holes.

[0016] Preferably, one end of the drainage pipe is connected to the bottom end of the filter cover, and the other end is connected to the sedimentation water tank.

[0017] Preferably, the filter cover is connected to the third cover body through the first rectangular hole.

[0018] Preferably: on the inner walls on both sides of the filter cover, multiple guide plates are alternately arranged below the water pipe, and the water flowing out of the spray port of the water pipe passes through the multiple guide plates to form a multi-stage water curtain to remove dust and cool the high-temperature and high-humidity dust-containing gas flowing into the filter cover.

[0019] Preferably, the secondary dust collector is a pulse bag dust collector.

[0020] Technical effects and advantages of the utility model:

[0021] 1. In the utility model, a primary water curtain dust collector is used in combination with a secondary dust collector. The high-temperature and high-humidity dust-containing gas at the front end is drawn to the primary water curtain dust collector by an exhaust fan, and the water curtain is used to remove dust and cool the high-temperature and high-humidity dust-containing gas, thereby reducing the dust content in the gas and improving the dust removal efficiency, which can effectively avoid the adverse effects caused by the blockage of the filter bag due to a large amount of dust-containing gas.

[0022] 2. In the utility model, part of the steam evaporated from the high-temperature mixture is first condensed through the first cover body, then enters the first-level water curtain dust collector for dust removal and cooling, and then enters the second-level dust collector for dust removal and is discharged into the atmosphere, thereby improving the quality of dust removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the transpiration drying equipment provided in the embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of the connection structure of the first-level water curtain dust collector in the transpiration drying equipment provided in the embodiment of the present application;

[0025] Figure 3 It is a cross-sectional view of a first-stage water curtain dust collector in the transpiration drying equipment provided in an embodiment of the present application;

[0026] Figure 4 The transpiration drying device provided in the embodiment of the present application Figure 3 A schematic diagram of the enlarged structure at point A in the middle.

[0027] In the figure: 1. Dryer body; 101. Feed inlet; 102. Discharge outlet; 103. Conveyor chain; 2. Dust cover; 21. First cover body; 22. Second cover body; 221. Flexible breathing cover; 23. Third cover body; 3. Exhaust fan; 4. Return water tank; 5. Sedimentation water tank; 6. First-stage water curtain dust collector; 611. First rectangular hole; 612. Second rectangular hole; 62. Filter cover; 63. Water pipe; 64. Drain pipe; 65. Guide plate; 7. Water pump; 71. Water inlet pipe; 72. Return pipe; 8. Second-stage dust collector; 81. Air inlet pipe; 82. Ash discharge port; 9. Variable-section ventilation pipe; 91. Ventilation pipe air inlet; 92. Ventilation pipe air outlet. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0029] See also Figure 1 and 2As shown, in this embodiment, a transpiration drying device is provided, including a dryer body 1, the dryer body 1 includes a feed port 101 arranged at the right end, a discharge port 102 arranged at the left end and a conveying chain 103 arranged inside, and a dust cover 2 is arranged at the upper end of the dryer body 1, and the dust cover 2 includes a first cover body 21, a second cover body 22 and a third cover body 23 connected in sequence from right to left, and there is a certain distance between the first cover body 21 and the feed port 101 (according to experimental tests, when the dryer body 1 is just entered, a large amount of high-temperature and high-humidity dust-containing gas has not yet been generated, and the feed The dust cover 2 is provided at a certain distance from the feed port 101 to save costs), the evenly mixed water-containing solid waste and calcium oxide mixture enters the dryer body 1 from the feed port 101, and the mixture is transported by the conveying chain 103. During the advancement process, the mixture heats up rapidly to generate a large amount of high-temperature and high-humidity dust-containing gas, which evaporates into the dust cover 2. Under the action of the negative pressure of the exhaust fan 3, the high-temperature and high-humidity dust-containing gas moves to the left and enters the first cover body 21, and then enters the first-level water curtain dust collector 6 under the negative pressure of the exhaust fan 3 for first-level dust removal and cooling.

[0030] In a specific embodiment, the main structures of the first cover body 21, the second cover body 22 and the third cover body 23 are all made of metal materials.

[0031] Furthermore, the top of the first cover body 21 is arranged in an arc shape, and the inner walls of the bottom ends of both sides of the first cover body 21 are provided with return water grooves 4, and part of the high-temperature and high-humidity dust-containing gas condenses in contact with the inner wall of the first cover body 21, and the condensed water flows into the return water grooves 4 along the inner wall of the first cover body 21, and flows into the sedimentation water tank 5 along the return water grooves 4. In a specific embodiment, the condensed water in the return water grooves 4 can also flow into a nearby water tank or other places.

[0032] In a specific embodiment, since the reaction at the corresponding position of the first cover body 21 is the most intense, the return grooves 4 can be set only on the inner walls of the bottom ends on both sides of the first cover body 21, or the return grooves 4 can be set on the inner walls of the bottom ends on both sides of the entire dust cover 2.

[0033] Furthermore, a flexible breathing hood 221 is provided on the side wall of the second cover body 22 . The flexible breathing hood 221 is made of polyester needle felt. When the exhaust fan 3 is working, air is replenished into the dust cover 2 through the flexible breathing hood 221 .

[0034] Furthermore, a first-level water curtain dust collector 6 is arranged on the outer wall of the third cover body 23. One side of the first-level water curtain dust collector 6 is connected to the third cover body 23, and the other side is connected to the exhaust fan 3 through the variable-section ventilation pipe 9. The exhaust fan 3 is connected to the second-level dust collector 8. The high-temperature and high-humidity dust-containing gas enters the first-level water curtain dust collector 6 under the action of wind, and after dust removal and cooling, the gas containing a small amount of dust enters the second-level dust collector 8 through the exhaust fan 3. After being filtered by the second-level dust collector 8, the clean gas is discharged into the atmosphere.

[0035] In this embodiment, the secondary dust collector 8 is a pulse bag dust collector.

[0036] In this embodiment, see Figure 2 and 3 As shown, the first-stage water curtain dust collector 6 includes a filter cover 62, a water pipe 63 and a drain pipe 64. The filter cover 62 is fixed to the side wall of the third cover body 23. The filter cover 62 is connected to the third cover body 23 at the top of the side wall on one side close to the third cover body 23, and is connected to the ventilation pipe air inlet 91 of the variable-section ventilation pipe 9 at the bottom of the other side wall. The water pipe 63 is located at the top of the filter cover 62 and extends along the length direction of the filter cover 62. It is used to spray water on the high-temperature and high-humidity dust-containing gas flowing into the filter cover 62 to remove dust and cool it.

[0037] In another embodiment, the filter cover 62 is fixed to the side wall of the third cover body 23, and the filter cover 62 is connected to the third cover body 23 at the bottom of one side wall close to the third cover body 23, and is connected to the ventilation pipe air inlet 91 of the variable-section ventilation pipe 9 at the top of the other side wall.

[0038] In another embodiment, the filter cover 62 is fixed on the top wall of the third cover body 23, the bottom wall of the filter cover 62 is connected to the third cover body 23, and the upper side wall is connected to the ventilation pipe air inlet 91 of the variable-section ventilation pipe 9.

[0039] In another embodiment, the filter cover 62 is fixed on the top wall of the third cover body 23 , the bottom wall of the filter cover 62 is connected to the third cover body 23 , and the top wall is connected to the ventilation pipe air inlet 91 of the variable-section ventilation pipe 9 .

[0040] In this embodiment, the first-stage water curtain dust collector 6 also includes a sedimentation water tank 5, a water pump 7 and a water inlet pipe 71, and the two ends of the water inlet pipe 71 are respectively connected to the water pump 7 and the water pipe 63, and the pipe wall of the water pipe 63 is provided with a spray port, which is a long strip through hole opened in the pipe wall of the water pipe 63.

[0041] Specifically, the filter cover 62 connects the water pipe 63 and the drain pipe 64. The water pipe 63 is located at the upper part of the filter cover 62 and extends along the length direction of the filter cover 62. A long strip-shaped gap is opened on the pipe wall of the water pipe 63 so that the water entering the water pipe 63 can flow out and flow under the action of gravity. The water pipe 63 is connected to one end of the water inlet pipe 71, and the other end of the water inlet pipe 71 is connected to the water outlet of the water pump 7. The drain pipe 64 is located at the bottom end of the filter cover 62, and the drain pipe 64 is vertically arranged. One end of the drain pipe 64 is connected to the bottom end of the filter cover 62, and the other end is connected to the sedimentation water tank 5. The bottom end of the filter cover 62 is provided with an inclined surface, so that the water falling on the bottom end of the filter cover 62 can quickly flow into the drain pipe 64. The drain pipe 64 is connected to one end of the return pipe 72, and the other end of the return pipe 72 extends to the top of the sedimentation water tank 5, so that the water flowing out of the drain pipe 64 can enter the sedimentation water tank 5 for sedimentation.

[0042] In another embodiment, the spray ports are a plurality of circular through holes formed on the wall of the water delivery pipe 63 .

[0043] In another embodiment, the spray ports are a plurality of square through holes opened on the wall of the water delivery pipe 63 .

[0044] For further information, see Figure 3 and 4 As shown, a long strip opening is provided above the side wall of the filter cover 62 contacting the third cover body 23, and a long strip opening is also provided at a corresponding position of the third cover body 23. The thickness of the filter cover 62 and the long strip opening of the third cover body 23 constitute a first rectangular hole 611. The filter cover 62 is connected with the third cover body 23 through the first rectangular hole 611. The high-temperature and high-humidity dust-containing gas in the third cover body 23 can enter the filter cover 62 from the first rectangular hole 611. On the inner walls on both sides of the filter cover 62, a plurality of guide plates 65 are alternately arranged below the water pipe 63. The water flowing out of the spray port of the water pipe 63 passes through the plurality of guide plates 65 to form a multi-stage water curtain, so as to remove dust and cool down the high-temperature and high-humidity dust-containing gas flowing into the filter cover 62.

[0045] The variable-section ventilation duct 9 includes a ventilation duct air inlet 91 and a ventilation duct air outlet 92. The filter cover 62 is provided with a second rectangular hole 612 at a position corresponding to the ventilation duct air inlet 91. The ventilation duct air inlet 91 is connected to the second rectangular hole 612 of the filter cover 62, and the ventilation duct air outlet 92 is connected to the air inlet of the exhaust fan 3. After the high-temperature and high-humidity dust-containing gas is dust-removed and cooled, the gas containing a small amount of dust passes through the second rectangular hole 612 of the filter cover 62, the ventilation duct air inlet 91, and the ventilation duct air outlet 92 in turn into the exhaust fan 3, and finally enters the secondary dust collector 8 for secondary dust removal.

[0046] See also Figure 1 As shown, the air outlet of the exhaust fan 3 is connected to the secondary dust collector 8 through the air inlet pipe 81. The gas containing a small amount of dust is filtered by the secondary dust collector 8 and discharged into the atmosphere. The dust generated by the filtration is discharged from the dust discharge port 82 of the secondary dust collector 8.

[0047] It can be understood that the uniformly mixed mixture of aqueous solid waste and calcium oxide enters the dryer body 1 from the feed port 101, and the calcium oxide reacts with the water in the aqueous solid waste (such as aqueous phosphogypsum) to release a large amount of heat. During the reaction of the material, the whole is in a splashing state, and a large amount of high-temperature and high-humidity dust-containing gas evaporates into the dust cover 2. As the reaction continues, the water in the aqueous solid waste is continuously consumed, and the material is gradually dried.

[0048] The working principle of the utility model is:

[0049] The initially mixed and stirred mixture of water-containing solid waste and calcium oxide enters the dryer body 1 from the feed port 101 and is pushed from right to left. During the pushing process, as the calcium oxide and water continue to react, the mixture heats up rapidly. After the mixture is transported to the first cover body 21, the heat released by the material reaction reaches a certain temperature, and the material is in a splashing state as a whole. A large amount of high-temperature and high-humidity dust-containing gas generated evaporates upward and enters the dust cover 2. Part of the steam condenses on the inner wall of the dust cover 2, and the condensed water flows down along the inner wall to the return water tank 4 and flows into the sedimentation water tank 5 (in the specific implementation method, according to the actual situation on site, the condensed water in the return water tank 4 can also be passed to other places). Under the action of the exhaust negative pressure of the exhaust fan 3, the high-temperature and high-humidity dust-containing gas moves to the left. When the exhaust fan 3 is working, air is replenished into the interior of the dryer body 1 through the flexible breathing hood 221 arranged on the side wall of the second cover body 22. Under the action of wind, the high-temperature and high-humidity dust-containing gas enters the first-level water curtain dust collector 6 through the first rectangular hole 611. The water pump 7 draws water from the sedimentation water tank 5 and enters the water supply pipe 63 from the water inlet pipe 71. The water sprayed from the water supply pipe 63 through the spray port forms a multi-stage water curtain by multiple guide plates 65 alternately arranged on the two side walls, and then flows into the return pipe 72 from the drain pipe 64 and enters the sedimentation water tank 5. After the high-temperature and high-humidity dust-containing gas is dust-removed and cooled by the multi-stage water curtain, the gas containing a small amount of dust enters the second-level dust collector 8 from the second rectangular hole 612 through the exhaust fan 3, and is discharged into the atmosphere after being filtered by the second-level dust collector 8.

[0050] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A transpiration drying device, characterized in that: The invention comprises a dryer body (1), a dust cover (2), an exhaust fan (3), a primary water curtain dust collector (6) and a secondary dust collector (8); the two ends of the dryer body (1) are respectively provided with a feed port (101) and a discharge port (102); the dust cover (2) is arranged at the upper end of the dryer body (1), and a primary water curtain dust collector (6) is arranged at an end close to the discharge port (102); the primary water curtain dust collector (6) is respectively connected to the dust cover (2) and the exhaust fan (3); and the exhaust fan (3) is connected to the secondary dust collector (8).

2. The transpiration drying equipment according to claim 1, characterized in that: The inner walls at the bottom ends of both sides of the dust cover (2) are provided with return water grooves (4), and part of the high-temperature and high-humidity dust-containing gas condenses by contacting the inner wall of the dust cover (2), and the condensed water flows into the return water grooves (4) along the inner wall of the dust cover (2).

3. The transpiration drying equipment according to claim 1, characterized in that: The dust cover (2) comprises a first cover body (21), a second cover body (22) and a third cover body (23) which are arranged in sequence along the forward direction of the material; the first-level water curtain dust collector (6) is arranged on the third cover body (23); and the second cover body (22) is provided with a flexible breathing cover (221) for replenishing air into the dust cover (2) when the exhaust fan (3) is working.

4. The transpiration drying equipment according to claim 1, characterized in that: The transpiration drying equipment also includes a variable-section ventilation pipe (9); The first-stage water curtain dust collector (6) comprises a filter cover (62), a water pipe (63) and a drainage pipe (64); The filter cover (62) is fixed on the side wall or the top wall of the third cover body (23); the filter cover (62) is connected to the third cover body (23) through the wall close to the third cover body (23), and is connected to the ventilation pipe air inlet (91) of the variable cross-section ventilation pipe (9) through other walls; the ventilation pipe air outlet (92) is connected to the air inlet of the exhaust fan (3); The water pipe (63) is located inside the filter cover (62) and extends along the length direction of the filter cover (62), and is used to spray water on the high-temperature and high-humidity dust-containing gas flowing into the filter cover (62) to remove dust and reduce the temperature.

5. The transpiration drying equipment according to claim 4, characterized in that: The first-stage water curtain dust collector (6) also includes a sedimentation water tank (5), a water pump (7) and a water inlet pipe (71), the two ends of the water inlet pipe (71) are respectively connected to the water pump (7) and the water delivery pipe (63), and the pipe wall of the water delivery pipe (63) is provided with a spray port.

6. The transpiration drying equipment according to claim 4, characterized in that: The filter cover (62) is fixed on the side wall of the third cover body (23); the filter cover (62) is connected to the third cover body (23) at the top or bottom of one side wall close to the third cover body (23); and is connected to the ventilation pipe air inlet (91) of the variable cross-section ventilation pipe (9) at the bottom or top of the other side wall; Alternatively, the filter cover (62) is fixed on the top wall of the third cover body (23), the bottom wall of the filter cover (62) is connected to the third cover body (23), and the upper side wall or the top wall is connected to the ventilation pipe air inlet (91) of the variable-section ventilation pipe (9).

7. The transpiration drying equipment according to claim 5, characterized in that: The spraying port is a long strip through hole or a plurality of circular or square through holes opened on the wall of the water delivery pipe (63).

8. The transpiration drying equipment according to claim 4, characterized in that: One end of the drainage pipe (64) is connected to the bottom end of the filter cover (62), and the other end is connected to the sedimentation water tank (5); the filter cover (62) is connected to the third cover body (23) through the first rectangular hole (611).

9. The transpiration drying equipment according to claim 5, characterized in that: On the inner walls of both sides of the filter cover (62), a plurality of guide plates (65) are alternately arranged below the water pipe (63); water flowing out of the spray port of the water pipe (63) passes through the plurality of guide plates (65) to form a multi-stage water curtain, thereby removing dust and cooling the high-temperature and high-humidity dust-containing gas flowing into the filter cover (62).

10. The transpiration drying equipment according to claim 1, characterized in that: The secondary dust collector (8) is a pulse bag dust collector.

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