Low-rank coal pyrolysis rotary kiln capable of waste heat recovery

Abstract

Disclosed in the present utility model is a low-rank coal pyrolysis rotary kiln capable of waste heat recovery, which comprises a stock bin and heat exchange structures. An inclined rotary structure is fixedly installed on the surface of one side of the stock bin, and a combustion structure is fixedly installed on the surface of one side of the inclined rotary structure. There are two heat exchange structures; a conveying structure is fixedly connected to the surfaces of the heat exchange structures; a flue gas filtering structure is fixedly mounted on the surfaces on one side of the heat exchange structures by means of the conveying structure; and a dust settling structure is fixedly mounted on the surface of one side of the flue gas filtering structure. The flue gas filtering structure comprises a bottom plate, a smoke discharge hopper, a filtering cylinder, a drawer, a waste water pipe, an air inlet and a support plate, the smoke discharge hopper being fixedly mounted on the upper surface of the filtering cylinder. The low-rank coal pyrolysis rotary kiln capable of waste heat recovery of the present utility model can easily filter out dust in waste heat and then treat same, thereby improving the heat exchange efficiency of waste heat and water.

Description

A low-rank coal pyrolysis rotary kiln capable of recovering waste heat Technical Field

[0001] The utility model relates to the technical field of low-rank coal pyrolysis rotary kilns, in particular to a low-rank coal pyrolysis rotary kiln capable of recovering waste heat. Background Art

[0002] A rotary kiln refers to a rotary calcining kiln (commonly known as a rotary kiln), which belongs to the category of building materials equipment. Rotary kilns are widely used in many production industries such as building materials, metallurgy, chemical industry, and environmental protection to perform mechanical, physical or chemical treatment on solid materials using rotary cylinder equipment.

[0003] The existing public application number CN202222773493.5 is a low-rank coal pyrolysis rotary kiln capable of recovering waste heat. The waste heat heat exchange component includes a support frame, an insulation box, a water outlet, a flue gas heat exchange box, a smoke outlet end, a smoke inlet end, an extension cylinder, a filter screen and a cold water inlet. When in use, the waste heat generated by the pyrolysis of low-rank coal can be utilized and the dust in the waste heat can be filtered to avoid waste heat resources. The flue gas filtration component includes a filter cylinder, a water tank, a smoke inlet, a base, a water supply pipe, a water pump, a spray assembly, an activated carbon filter cylinder and a smoke exhaust pipe. When in use, the residual heat in the flue gas can be cooled secondary, and the toxic substances therein can be filtered to avoid high-temperature gas and toxic substances from polluting the air. However, in daily use, after filtering the dust in the waste heat, the filtered dust and water cannot be discharged. The long-term accumulation of dust affects the emission of flue gas. During heat conversion, hot air exchanges heat with cold water. Both air and water are in a flowing state. The short heat exchange makes the exchange efficiency poor and the water temperature changes little. For this reason, we propose a low-rank coal pyrolysis rotary kiln that can recover waste heat.

[0004] Utility Model Content

[0005] The main purpose of the utility model is to provide a low-rank coal pyrolysis rotary kiln capable of recovering waste heat, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A low-rank coal pyrolysis rotary kiln capable of recovering waste heat comprises a silo and a heat exchange structure, wherein an inclined rotary structure is fixedly mounted on one side surface of the silo, a combustion structure is fixedly mounted on one side surface of the inclined rotary structure, the heat exchange structure comprises two groups, a transmission structure is fixedly connected to the surface of the heat exchange structure, a flue gas filtration structure is fixedly mounted on one side surface of the heat exchange structure via the transmission structure, and a dust reduction structure is fixedly mounted on one side surface of the flue gas filtration structure.

[0008] Furthermore, the smoke filtering structure includes a bottom plate, a smoke outlet pipe, a filter cartridge, a drawer, a waste pipe, an air inlet, and a support plate. The smoke outlet pipe is fixedly installed on the upper surface of the filter cartridge, the waste pipe is embedded and installed on the front surface of the filter cartridge near the bottom, and the drawer is embedded and installed on the front surface of the filter cartridge above the waste pipe. The interior of the filter cartridge is located below the drawer and support plates are embedded and installed near both sides. The support plates are divided into two groups. The bottom plate is fixedly installed on the lower surface of the filter cartridge, and an air inlet is provided on one side surface of the filter cartridge near the bottom.

[0009] Furthermore, the dust reduction structure includes a pipeline, a water pump, and a water storage tank. The water pump is fixedly installed on the upper surface of the water storage tank, and the pipeline is fixedly installed on the upper surface of the water pump.

[0010] Furthermore, the smoke filtering structure and the dust reduction structure are fixedly mounted on the upper surface of the bottom plate near one side through a water storage tank, and the upper port of the pipeline is embedded in one side surface of the filter cartridge.

[0011] Furthermore, the heat exchange structure includes a water inlet pipe, a heat exchange water tank, a heat exchange air tank, and a drain pipe. The water inlet pipe is embedded in the upper surface of the heat exchange water tank, the drain pipe is embedded in the lower surface of the heat exchange water tank, and the heat exchange air tank is embedded in the interior of the heat exchange water tank.

[0012] Furthermore, the transmission structure includes a first transmission pipe, a sewage pipe, a second transmission pipe, a diversion pipe, a diversion trough, and a filter. The sewage pipe is embedded in the surface of the first transmission pipe, and a filter is embedded in the interior of the sewage pipe near one side. Diversion troughs are provided on adjacent surfaces of the first transmission pipe and the second transmission pipe. There are four groups of diversion troughs, and diversion pipes are embedded in the interior of each diversion trough.

[0013] Furthermore, the heat exchange structure and the transmission structure are respectively embedded and installed on the two side surfaces of the water inlet pipe and the heat exchange water tank through the diversion pipe. The first transmission pipe is fixedly installed on one side surface of the silo, and the second transmission pipe is fixedly installed on one side surface of the filter cartridge.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the utility model, through the provided drawer, when the smoke is filtered by the dust reduction structure and falls into the interior of the drawer, the user can easily handle the dust to avoid accumulation. Through the provided heat exchange structure and transmission structure, when the smoke reaches the interior of the transmission structure, it can be diverted, thereby extending the time of heat exchange between air and water, which is beneficial to improving the efficiency of water heating and achieving better waste heat recovery and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the overall structure of a low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to the present invention;

[0017] FIG2 is a detailed diagram of the dust reduction structure of a low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to the present invention;

[0018] FIG3 is a cross-sectional view of a filter cartridge of a low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to the present invention;

[0019] FIG4 is a cross-sectional view of a heat exchange tank of a low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to the present invention;

[0020] FIG5 is a top view of a heat exchange tank of a low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to the present invention;

[0021] FIG6 is an enlarged view of the detail of point A in FIG5 of a low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to the present invention.

[0022] In the figure: 1. Flue gas filtration structure; 101. Bottom plate; 102. Smoke outlet; 103. Filter cartridge; 104. Drawer; 105. Waste water pipe; 106. Air inlet; 107. Support plate; 2. Dust reduction structure; 201. Pipeline; 202. Water pump; 203. Water storage tank; 3. Heat exchange structure; 301. Water inlet pipe; 302. Heat exchange water tank; 303. Heat exchange air tank; 304. Drain pipe; 4. Silo; 5. Inclined rotary structure; 6. Combustion structure; 7. Transmission structure; 701. First transmission pipe; 702. Drain pipe; 703. Second transmission pipe; 704. Diverter pipe; 705. Diverter trough; 706. Filter. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] As shown in Figures 1-6, a low-rank coal pyrolysis rotary kiln capable of recovering waste heat includes a silo 4 and a heat exchange structure 3. An inclined rotary structure 5 is fixedly mounted on one side of the silo 4. A combustion structure 6 is fixedly mounted on one side of the inclined rotary structure 5. The heat exchange structure 3 is divided into two groups. A transmission structure 7 is fixedly connected to the surface of the heat exchange structure 3. A flue gas filter structure 1 is fixedly mounted on one side of the heat exchange structure 3 through the transmission structure 7. A dust suppression structure 2 is fixedly mounted on one side of the flue gas filter structure 1.

[0025] The smoke filtering structure 1 includes a bottom plate 101, a smoke outlet 102, a filter cartridge 103, a drawer 104, a waste pipe 105, an air inlet 106, and a support plate 107. The smoke outlet 102 is fixedly installed on the upper surface of the filter cartridge 103. The front surface of the filter cartridge 103 is located near the bottom and embedded with a waste pipe 105. The front surface of the filter cartridge 103 is located above the waste pipe 105 and embedded with a drawer 104. The lower surface of the drawer 104 is in a mesh shape to facilitate water dripping to the bottom of the filter cartridge 103. The interior of the filter cartridge 103 is located below the drawer 104 and is embedded with support plates 107 near both sides. The support plate 1 07 is two groups, the support plate 107 supports the drawer 104, the bottom surface of the filter cartridge 103 is fixedly installed with the bottom plate 101, and the side surface of the filter cartridge 103 is located near the bottom and has an air inlet 106; the dust reduction structure 2 includes a pipe 201, a water pump 202, and a water tank 203. The upper surface of the water tank 203 is fixedly installed with a water pump 202, and the upper surface of the water pump 202 is fixedly installed with a pipe 201, and the upper end of the pipe 201 is connected to a nozzle; the smoke filtering structure 1 and the dust reduction structure 2 are fixedly installed on the upper surface of the bottom plate 101 through the water tank 203, and are located near one side. The upper end of the pipe 201 is embedded Installed on one side surface of the filter cartridge 103; the heat exchange structure 3 includes a water inlet pipe 301, a heat exchange water tank 302, a heat exchange air box 303, and a drain pipe 304. The upper surface of the heat exchange water tank 302 is embedded with the water inlet pipe 301, the lower surface of the heat exchange water tank 302 is embedded with the drain pipe 304, and the interior of the heat exchange water tank 302 is embedded with the heat exchange air box 303; the transmission structure 7 includes a first transmission pipe 701, a sewage pipe 702, a second transmission pipe 703, a diversion pipe 704, a diversion trough 705, and a filter screen 706. The surface of the first transmission pipe 701 is embedded with the sewage pipe 702, and the interior of the sewage pipe 702 is located near one side. A filter screen 706 is embedded and installed, and diversion grooves 705 are provided on the adjacent surfaces of the first transmission pipe 701 and the second transmission pipe 703. There are four groups of diversion grooves 705, and diversion pipes 704 are embedded and installed inside the diversion grooves 705; the heat exchange structure 3 and the transmission structure 7 are respectively embedded and installed on the two side surfaces of the water inlet pipe 301 and the heat exchange water tank 302 through the diversion pipe 704. The first transmission pipe 701 is fixedly installed on the one side surface of the silo 4, and the second transmission pipe 703 is fixedly installed on the one side surface of the filter cartridge 103. Solenoid valves are provided on the surfaces of the water inlet pipe 301, the drain pipe 304 and the diversion pipe 704, and the water flow and flue gas are controlled by the solenoid valves.

[0026] It should be noted that the present invention is a low-rank coal pyrolysis rotary kiln that can recover waste heat. When in use, the raw materials are transported in from the hopper 4, and the inclined rotary structure 5 and the combustion structure 6 perform inclined rotation and heat treatment on the raw materials. The generated flue gas is transported by the transmission structure 7, and the heat exchange structure 3 performs heat conversion on water, and is treated by the flue gas filtering structure 1 and the dust reduction structure 2 before being discharged. When the smoke reaches the inside of the first transmission pipe 701, it is preliminarily filtered under the action of the filter 706, and the filtered impurities are discharged from the sewage pipe 702. The smoke passes through one group of diversion troughs 705 and the diversion pipe 704 to reach the inside of the heat exchange air box 303, and water is input into the inside of the heat exchange water tank 302 through the water inlet pipe 301. The hot air and cold water perform heat exchange treatment. After a certain amount of hot air is stored in the heat exchange air box 303, the separated The flow pipe 704 is closed, and the other group of flow pipes 704 is opened, so that the hot air passes through the other group of flow grooves 705 and the diversion pipe 704 to reach the interior of the heat exchange air box 303. At this time, the valve after the previous heat treatment is opened, so that the flue gas is discharged through the second transmission pipe 703 and the water is discharged through the drain pipe 304. In this way, the two groups of heat exchange structures 3 work alternately. The flue gas discharged from the second transmission pipe 703 passes through the air inlet 106 to the interior of the filter cartridge 103 above the bottom plate 101. The water pump 202 is started, and the water pump 202 pumps out the water inside the water tank 203 and reduces dust on the flue gas inside the filter cartridge 103 through the pipe 201. The dust-reduced and filtered flue gas is discharged from the smoke outlet 102, and the dust falls into the interior of the drawer 104 above the support plate 107. The water is filtered out by the drawer 104 and discharged through the waste water pipe 105.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A low-rank coal pyrolysis rotary kiln capable of recovering waste heat, characterized in that: It includes a silo (4) and a heat exchange structure (3). On one side surface of the silo (4), an inclined rotary structure (5) is fixedly installed. On one side surface of the inclined rotary structure (5), a combustion structure (6) is fixedly installed. There are two groups of the heat exchange structures (3). A transmission structure (7) is fixedly connected to the surface of the heat exchange structure (3). On one side surface of the heat exchange structure (3), a flue gas filtration structure (1) is fixedly installed through the transmission structure (7). On one side surface of the flue gas filtration structure (1), a dust removal structure (2) is fixedly installed.

2. The low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to claim 1, wherein: The flue gas filtration structure (1) includes a bottom plate (101), a smoke outlet pipe (102), a filter cylinder (103), a drawer (104), a waste water pipe (105), an air inlet (106), and a support plate (107). The smoke outlet pipe (102) is fixedly installed on the upper surface of the filter cylinder (103). The waste water pipe (105) is embedded and installed on the front surface of the filter cylinder (103) at a position close to the lower part. The drawer (104) is embedded and installed on the front surface of the filter cylinder (103) above the waste water pipe (105). On both sides of the inside of the filter cylinder (103) below the drawer (104) and close to the two sides, support plates (107) are embedded and installed. There are two groups of the support plates (107). The bottom plate (101) is fixedly installed on the lower surface of the filter cylinder (103). The air inlet (106) is opened on one side surface of the filter cylinder (103) at a position close to the lower part.

3. The low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to claim 2, wherein: The dust removal structure (2) includes a pipe (201), a water pump (202), and a water storage tank (203). The water pump (202) is fixedly installed on the upper surface of the water storage tank (203). The pipe (201) is fixedly installed on the upper surface of the water pump (202).

4. The low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to claim 3, characterized in that: The flue gas filtration structure (1) and the dust removal structure (2) are fixedly installed on the upper surface of the bottom plate (101) at a position close to one side through the water storage tank (203). The upper port of the pipe (201) is embedded and installed on one side surface of the filter cylinder (103).

5. The low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to claim 4, wherein: The heat exchange structure (3) includes a water inlet pipe (301), a heat exchange water tank (302), a heat exchange gas tank (303), and a drain pipe (304). The water inlet pipe (301) is embedded and installed on the upper surface of the heat exchange water tank (302). The drain pipe (304) is embedded and installed on the lower surface of the heat exchange water tank (302). The heat exchange gas tank (303) is embedded and installed inside the heat exchange water tank (302).

6. The low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to claim 5, wherein: The transmission structure (7) includes a first transmission pipe (701), a sewage discharge pipe (702), a second transmission pipe (703), a shunt pipe (704), a shunt groove (705), and a filter screen (706). The sewage discharge pipe (702) is embedded and installed on the surface of the first transmission pipe (701). The filter screen (706) is embedded and installed inside the sewage discharge pipe (702) near one side. Shunt grooves (705) are provided on the adjacent surfaces of the first transmission pipe (701) and the second transmission pipe (703). There are four groups of shunt grooves (705), and shunt pipes (704) are embedded and installed inside the shunt grooves (705).

7. A low-rank coal pyrolysis rotary kiln capable of recovering waste heat according to claim 6, characterized in that: The heat exchange structure (3) and the transmission structure (7) are respectively embedded and installed on both side surfaces of the water inlet pipe (301) and the heat exchange water tank (302) through the shunt pipe (704). The first transmission pipe (701) is fixedly installed on one side surface of the silo (4). The second transmission pipe (703) is fixedly installed on one side surface of the filter cylinder (103).

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