Closed water-cooling waste heat recovery device for calcining kaolin

Abstract

The closed water-cooling waste heat recovery device is characterized in that a water-cooling sleeve is sleeved on the outer side of a machine body of a secondary wall cooler, annular plates are respectively fixed on two sides of the water-cooling sleeve, a plurality of water inlets are formed in the top of the water-cooling sleeve, and a plurality of water outlets are formed in the bottom of the water-cooling sleeve; a water source is communicated with the water inlet through a pipeline, and a heat preservation water storage pool is arranged underground below the second-stage wall cooling machine; the water outlet is communicated with the water inlet of the heat preservation reservoir through a pipeline, and the water outlet of the heat preservation reservoir is respectively communicated with a heating user and a domestic water user through pipelines. The utility model has the advantages that the connecting structure is simple and easy to realize, the temperature of a kaolin finished product cooled by the two-stage wall cooler is reduced to normal temperature, and a subsequent conveying system adopts a conventional screw conveyer, a bucket elevator and other low-temperature conveying systems, so that the energy consumption is reduced, the heat energy recovery is realized, and the production cost is reduced. And the living cost of an enterprise is saved.

Description

Technical field:

[0001] The utility model relates to the technical field of kaolin production, in particular to a closed water-cooled waste heat recovery device for calcined kaolin. Background technology:

[0002] The finished kaolin product is an ultra-white and ultra-fine powder, which is mainly used in papermaking, ceramics, medicine, inks, coatings, etc. It has a very wide range of uses. At present, the finished kaolin product is crushed coal gangue that enters the kiln from the kiln tail of the calcining rotary kiln through a screw conveyor, and gradually moves toward the kiln head as the kiln rotates. After high-temperature calcination, dehydroxylation, decarbonization and whitening at 950-1100°C in the kiln, kaolin finished clinker is formed, which is discharged from the discharge port at the bottom of the kiln head cover and sent to the wall cooler to cool the outer wall of the wall cooler by natural wind. The application number is 202210296683.4, and the name is a patent for a high-efficiency and energy-saving calcination system for kaolin. It discloses that a kiln cover is set on the outside of the wall cooler, and the hot air in the kiln cover is extracted by an induced draft fan. The amount of natural wind introduced not only realizes the cooling of the finished kaolin in the wall cooler, but also transports the hot air as primary and secondary air to the burner, realizing the recovery of heat energy, reducing the use of fuel by the burner, and saving the production cost of the enterprise; however, the temperature of the finished kaolin material discharged from the wall cooler after natural wind cooling still reaches 150℃-160℃, which is still relatively high. Due to the high temperature of the material, only wind transportation can be used. The power of the induced draft fan for wind transportation is 300kW, and the daily power consumption is 300*24=7200kwh. The high power consumption leads to high overall cost. Utility model content:

[0003] The utility model aims to provide a closed water-cooled waste heat recovery device for calcined kaolin, which has a simple connection structure, realizes heat energy recovery, and reduces the cost of living of enterprises.

[0004] The utility model is implemented by the following technical scheme: The purpose of this patent is to provide a closed water-cooled waste heat recovery device for calcining kaolin, which includes a calcining rotary kiln, a primary wall cooler and a secondary wall cooler, the discharge port of the calcining rotary kiln is connected to the feed port of the primary wall cooler, and the discharge port of the primary wall cooler is connected to the feed port of the secondary wall cooler;

[0005] A water cooling sleeve is sleeved on the outside of the body of the two-stage wall cooler, and ring plates are fixed on both sides of the water cooling sleeve respectively. A plurality of water inlets are opened on the top of the water cooling sleeve, and a plurality of water outlets are opened on the bottom of the water cooling sleeve. The water source is connected to the water inlet through a pipeline, and an insulation water storage tank is opened underground below the two-stage wall cooler; the water outlet is connected to the water inlet of the insulation water storage tank through a pipeline, and the water outlet of the insulation water storage tank is connected to heating users and domestic water users through pipelines.

[0006] Furthermore, a rubber sealing ring is fixed to the inner side edge of the ring plate, and the inner side edge of the rubber sealing ring is in active contact with the outer side of the body of the secondary wall cooler.

[0007] Furthermore, baffles are fixed on both sides of the inner wall of the water-cooling sleeve above the body of the secondary wall cooler.

[0008] Furthermore, a kiln hood is provided above the body of the primary wall cooler along its length direction, and an air outlet is opened on the side wall of the kiln hood, and the air outlet is connected with the air inlet of the induced draft fan through a pipeline, and the air outlet of the induced draft fan is respectively connected with the primary air inlet and the secondary air inlet of the burner on the calcining rotary kiln through pipelines, and the kiln hood is an arc-shaped structure matching the shape of the primary wall cooler, and the opening of the kiln hood is arranged downward.

[0009] Furthermore, the structures of the first-stage wall cooler and the second-stage wall cooler are the same, and the second-stage wall cooler includes the body; rotating wheels are respectively mounted and fixed on the front and rear sides of the body, and a support wheel matching with the rotating wheel is rotatably provided on a support seat below the rotating wheel; the support seat on the front side of the body is higher than the support seat on the rear side of the body; the front end of the body is the feeding end, and the rear end is the discharging end; a rotating gear is mounted and fixed on the outer side of one end of the body, and a driving gear matching with the rotating gear is rotatably provided on the gear seat below the rotating gear, and the output end of the driving motor is transmission-connected to the driving gear.

[0010] Advantages of the utility model: 1. The utility model has a simple connection structure and is easy to implement. By setting a primary wall cooler and a secondary wall cooler, the calcined kaolin finished product is effectively cooled. The temperature of the kaolin finished product after cooling by the secondary wall cooler drops to room temperature. The subsequent conveying system uses a conventional bucket elevator for conveying, thereby replacing the induced draft fan for conveying. The bucket elevator power is 11kW, which can greatly reduce energy consumption.

[0011] 2. The finished kaolin product enters the secondary wall cooler after heat exchange in the primary wall cooler. The cooling water enters from the water inlet of the water cooling sleeve to exchange heat with the finished kaolin product in the machine body. The water after absorbing heat is discharged from the water outlet of the water cooling sleeve to the thermal insulation water tank and used as hot water to provide heating to heating users and hot water to domestic water users, further realizing the recovery of thermal energy and saving the company's living costs. Description of the drawings:

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 for Figure 1 Schematic diagram of the cross section of the AA section.

[0015] Figure 3 for Figure 1 Schematic diagram of the cross section of the BB part.

[0016] Calcination rotary kiln 1, burner 101, primary wall cooler 2, secondary wall cooler 3, machine body 301, rotary wheel 302, support seat 303, support wheel 304, rotary gear 305, gear seat 306, drive gear 307, drive motor 308, water cooling sleeve 4, ring plate 5, water source 6, thermal insulation water storage tank 7, heating user 8, domestic water user 9, rubber sealing ring 10, baffle 11, kiln cover 12, induced draft fan 13. Specific implementation method:

[0017] Example: Figure 1-3As shown, a closed water-cooled waste heat recovery device for calcining kaolin comprises a calcining rotary kiln 1, a primary wall cooler 2 and a secondary wall cooler 3, the discharge port of the calcining rotary kiln 1 is connected with the feed port of the primary wall cooler 2, and the discharge port of the primary wall cooler 2 is connected with the feed port of the secondary wall cooler 3; a water-cooling sleeve 4 is sleeved on the outer side of the body 301 of the secondary wall cooler 3, and ring plates 5 are fixed on both sides of the water-cooling sleeve 4, a plurality of water inlets are opened on the top of the water-cooling sleeve 4, and a plurality of water outlets are opened on the bottom of the water-cooling sleeve 4, a water source 6 is connected with the water inlet through a pipeline, and an insulating water storage tank 7 is opened underground below the secondary wall cooler 3; the water outlet is connected with the water inlet of the insulating water storage tank 7 through a pipeline, and the water outlet of the insulating water storage tank 7 is respectively connected with a heating user 8 and a domestic water user 9 through pipelines, and cooling water enters the water inlet of the water-cooling sleeve 4 from the water inlet of the secondary wall cooler 3 The finished kaolin product in the body 301 exchanges heat, and the water after absorbing heat is discharged from the water outlet of the water-cooling sleeve 4 to the heat-insulating water storage tank 7 for heat preservation and storage, and then used as hot water to provide heating to the heating users 8 and hot water to the domestic water users 9, further realizing the recovery of heat energy and saving the living cost of the enterprise; a rubber sealing ring 10 is fixed on the inner side edge of the ring plate 5, and the inner side edge of the rubber sealing ring 10 is in active contact with the outer side of the body 301 of the secondary wall cooler 3, which can play a shielding role to prevent impurities from entering the water-cooling sleeve 4, ensure the cleanliness of the hot water, and ensure the normal water use of the domestic water users 9, and baffles 11 are fixed on both sides of the inner wall of the water-cooling sleeve 4 above the body 301 of the secondary wall cooler 3, and a part of the cooling water entering from the water inlet of the water-cooling sleeve 4 will flow along the inner wall of the water-cooling sleeve 4, and the baffles 11 will guide it to the body 301 to improve the heat exchange effect.

[0018] A kiln hood 12 is provided above the body of the primary wall cooler 2 along its length direction, and an air outlet is opened on the side wall of the kiln hood 12, and the air outlet is connected with the air inlet of the induced draft fan 13 through a pipeline, and the air outlet of the induced draft fan 13 is respectively connected with the primary air inlet and the secondary air inlet of the burner 101 on the calcining rotary kiln 1 through pipelines. The kiln hood 12 is an arc structure matching the appearance of the primary wall cooler 2, and the opening of the kiln hood 12 is arranged downward, and the hot air in the kiln hood 12 is extracted by the induced draft fan 13, and the amount of natural wind introduced is increased, thereby realizing effective cooling of the kaolin finished product in the primary wall cooler 2, and the induced draft fan 13 conveys the hot air as primary air and secondary air to the burner 101, thereby realizing heat energy recovery, reducing the use of fuel by the burner 101, and saving the production cost of the enterprise.

[0019] The first-stage wall cooler 2 and the second-stage wall cooler 3 have the same structure. The second-stage wall cooler 3 includes a body 301; a rotating wheel 302 is respectively sleeved and fixed on the front and rear sides of the body 301, and a supporting wheel 304 that matches the rotating wheel 302 is rotatably arranged on a supporting seat 303 below the rotating wheel 302; the supporting seat 303 on the front side of the body 301 is higher than the supporting seat 303 on the rear side of the body 301; the front end of the body 301 is the feeding end, and the rear end is the discharging end; a rotating wheel 304 is sleeved and fixed on the outer side of one end of the body 301 The rotating gear 305 is provided with a driving gear 307 which matches the rotating gear 305 on the gear seat 306 below the rotating gear 305, and the output end of the driving motor 308 is connected with the driving gear 307 in transmission. When the kaolin finished product in the cooling body 301, the driving motor 308 drives the driving gear 307 to rotate, thereby driving the body 301 to rotate. During the rotation, the kaolin finished product moves along the body 301 from its feeding end to the discharging end, and is finally discharged from the discharging end into the subsequent equipment.

[0020] The kaolin product calcined in the calcining rotary kiln 1 is sent to the primary wall cooler 2 for natural wind cooling, and then enters the secondary wall cooler 3 for water cooling. The temperature of the kaolin product cooled by the secondary wall cooler 3 drops to room temperature, and the subsequent conveying system uses a conventional bucket elevator for conveying, replacing the induced draft fan. The bucket elevator has a power of 11kW, which can greatly reduce energy consumption.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A closed water-cooled waste heat recovery device for calcining kaolin, characterized in that: It comprises a calcining rotary kiln, a primary wall cooler and a secondary wall cooler, wherein the discharge port of the calcining rotary kiln is connected to the feed port of the primary wall cooler, and the discharge port of the primary wall cooler is connected to the feed port of the secondary wall cooler; A water cooling sleeve is sleeved on the outside of the body of the two-stage wall cooler, and ring plates are fixed on both sides of the water cooling sleeve respectively. A plurality of water inlets are opened on the top of the water cooling sleeve, and a plurality of water outlets are opened on the bottom of the water cooling sleeve. The water source is connected to the water inlet through a pipeline, and an insulation water storage tank is opened underground below the two-stage wall cooler; the water outlet is connected to the water inlet of the insulation water storage tank through a pipeline, and the water outlet of the insulation water storage tank is connected to heating users and domestic water users through pipelines.

2. A closed water-cooled waste heat recovery device for calcined kaolin according to claim 1, characterized in that: A rubber sealing ring is fixed on the inner side edge of the ring plate, and the inner side edge of the rubber sealing ring is in active contact with the outer side of the body of the secondary wall cooler.

3. The closed water-cooled waste heat recovery device for calcined kaolin according to claim 1, characterized in that: Baffles are respectively fixed on both sides of the inner wall of the water cooling sleeve above the body of the secondary wall cooler.

4. The closed water-cooled waste heat recovery device for calcined kaolin according to claim 1, characterized in that: A kiln hood is provided above the body of the primary wall cooler along its length direction, and an air outlet is opened on the side wall of the kiln hood, and the air outlet is connected with the air inlet of the induced draft fan through a pipeline, and the air outlet of the induced draft fan is respectively connected with the primary air inlet and the secondary air inlet of the burner on the calcining rotary kiln through pipelines, and the kiln hood is an arc-shaped structure matching the shape of the primary wall cooler, and the opening of the kiln hood is arranged downward.

5. A closed water-cooled waste heat recovery device for calcined kaolin according to any one of claims 1 to 4, characterized in that: The structures of the first-stage wall cooler and the second-stage wall cooler are the same, and the second-stage wall cooler includes the body; rotating wheels are respectively mounted and fixed on the front and rear sides of the body, and a support wheel matching with the rotating wheel is rotatably arranged on a support seat below the rotating wheel; the support seat on the front side of the body is higher than the support seat on the rear side of the body; the front end of the body is the feeding end, and the rear end is the discharging end; a rotating gear is mounted and fixed on the outer side of one end of the body, and a driving gear matching with the rotating gear is rotatably arranged on the gear seat below the rotating gear, and the output end of the driving motor is transmission-connected with the driving gear.

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