Energy-saving rotary furnace with multi-stage heat supply and waste heat utilization functions

Abstract

The invention relates to the technical field of rotary furnaces, and discloses an energy-saving rotary furnace with multistage heat supply and waste heat utilization, which comprises a first furnace body, one end of the first furnace body is provided with a second furnace body, one end of the second furnace body is provided with a third furnace body, and the two ends of the second furnace body are further provided with supporting box bodies. The supporting box body is used for providing rotary connection between the first furnace body and the second furnace body and between the first furnace body and the third furnace body, and first combustion ends are installed at one ends of the first furnace body, the second furnace body and the third furnace body correspondingly. A third combustion end, a second combustion end and a first combustion end are correspondingly mounted at one end of the first furnace body, one end of the second furnace body and one end of the third furnace body, and a conveying plate is fixedly mounted in the supporting box body. By means of the three-section heating mode of the furnace body, the tail gas amount can be reduced, meanwhile, heat energy loss can be reduced, energy needed by combustion is reduced, and it is guaranteed that each section of the furnace can be evenly heated.

Description

Technical Field

[0001] The invention relates to the technical field of rotary furnaces, in particular to an energy-saving rotary furnace with multi-stage heat supply and waste heat utilization. Background Art

[0002] A rotary kiln is a device used to calcine materials. It can process materials from a variety of industries, such as limestone, ceramsite sand, zinc oxide, etc. In the building materials industry, rotary kilns are used to calcine cement clinker, as well as clay, limestone and slag drying. In refractory production, rotary kilns are used to calcine raw materials to stabilize size and increase strength.

[0003] When the rotary kiln is burning, a large amount of smoke and dust exhaust gas will be generated, and the smoke and dust exhaust gas is usually composed of particulate matter. This kind of exhaust gas containing particulate matter is easy to cause impact on the environment and equipment. Summary of the invention

[0004] The present invention provides an energy-saving rotary kiln with multi-stage heating and waste heat utilization, which has the beneficial effect of reducing smoke and dust, and solves the problem mentioned in the above background technology that a large amount of smoke and dust exhaust gas will be generated when the rotary kiln is burned. The smoke and dust exhaust gas is usually composed of particulate matter. This kind of exhaust gas containing particulate matter is likely to cause impacts on the environment and equipment.

[0005] The present invention provides the following technical solution: an energy-saving rotary furnace with multi-stage heat supply and waste heat utilization, comprising a first furnace body, a second furnace body is installed at one end of the first furnace body, a third furnace body is installed at one end of the second furnace body, and support boxes are also installed at both ends of the second furnace body, the support boxes are used to provide a rotation connection between the first furnace body and the second furnace body and the third furnace body, and a first combustion end is installed at one end of the first furnace body, the second furnace body and the third furnace body;

[0006] The first furnace body, the second furnace body and one end of the third furnace body are respectively equipped with a third combustion end, a second combustion end and a first combustion end;

[0007] A conveying plate is fixedly installed inside the supporting box, and the conveying plate is used to carry out material transportation between the first furnace body and the second furnace body and between the second furnace body and the third furnace body;

[0008] The first furnace body, the second furnace body and the third furnace body are each correspondingly installed with a first heat recovery box, a second heat recovery box and a third heat recovery box. The third heat recovery box has the same structure as the second heat recovery box and the first heat recovery box. The third heat recovery box includes a third heat conduction box, a suction pipe and a discharge pipe. The third heat conduction box is fixedly installed at the top of the third furnace body. The suction pipe is fixedly installed inside the third heat conduction box. A discharge pipe is provided at one end of the suction pipe, and the lower end of the discharge pipe is used to extend to the top of the third combustion end.

[0009] The third heat recovery tank, the second heat recovery tank and the first heat recovery tank are all filled with liquid.

[0010] As an optional solution of the energy-saving rotary furnace with multi-stage heat supply and waste heat utilization of the present invention, wherein: the third heat recovery box also includes a heat-conducting arc plate and a heat-conducting fin, the lower end of the suction pipe is provided with a heat-conducting arc plate, the upper surface of the heat-conducting arc plate is arranged with heat-conducting fins, and the heat-conducting fins are used to extend to the interior of the third heat-conducting box;

[0011] A gear ring is installed below the first furnace body, the second furnace body and the third furnace body. A driving motor is installed at the lower end of the gear ring. The driving motor is used to mesh with the tooth grooves of the gear ring.

[0012] As an optional solution of the energy-saving rotary furnace with multi-stage heat supply and waste heat utilization described in the present invention, wherein: a stirring structure is provided inside the discharge pipe, and the stirring structure includes a flow channel, a support frame, a rotating shaft, spiral blades and stirring blades, the flow channel is provided inside the rotating shaft, a support frame is provided at the bottom end of the flow channel, a rotating shaft is rotatably installed inside the support frame, the top end of the rotating shaft is provided with spiral blades, and the lower end of the rotating shaft is provided with stirring blades.

[0013] As an optional solution of the energy-saving rotary furnace with multi-stage heat supply and waste heat utilization of the present invention, the second heat recovery box includes a second heat conduction box, a first liquid inlet pipe and a second steam pipe, the second heat conduction box has the same internal structure as the third heat conduction box, and the first liquid inlet pipe is fixedly installed at one end of the second heat conduction box;

[0014] A second liquid outlet pipe is fixedly installed at the other end of the second heat conduction box, and a second steam pipe located at the other end of the second heat conduction box is fixedly installed at the upper end of the second liquid outlet pipe;

[0015] A second liquid inlet pipe is fixedly installed at one end of the third heat conduction box, a delivery pipe is fixedly installed at the other end of the third heat conduction box, and a third steam pipe located at the other end of the third heat conduction box is installed at the upper end of the delivery pipe;

[0016] The first heat recovery box includes a first heat conduction box, a reflux pipe, a first steam pipe and a first liquid outlet pipe. The first heat conduction box is fixedly installed inside the first furnace body, the reflux pipe is fixedly installed at one end of the first heat conduction box, the first liquid outlet pipe is fixedly installed at the other end of the first heat conduction box, and the reflux pipe located at the other end of the first heat conduction box is fixedly installed at the upper end of the first liquid outlet pipe.

[0017] As an optional solution of the energy-saving rotary furnace with multi-stage heat supply and waste heat utilization of the present invention, wherein: the first liquid outlet pipe is connected to the first liquid inlet pipe, and the second liquid outlet pipe is connected to the second liquid inlet pipe;

[0018] The third steam pipe, the second steam pipe and the first steam pipe are connected to form an exhaust pipe, and a heat preservation pipe is fixedly installed at the lower end of the exhaust pipe;

[0019] A high-pressure delivery pump is installed at one end of the first liquid outlet pipe and the second liquid outlet pipe, and a high-pressure delivery pump is installed at one side of the exhaust pipe.

[0020] As an optional solution of the energy-saving rotary furnace with multi-stage heat supply and waste heat utilization of the present invention, wherein: a coarse filter structure is fixedly installed on one side of the second furnace body, a fine filter structure is fixedly installed on one side of the coarse filter structure, and one end of the conveying pipe is connected to one side of the coarse filter structure;

[0021] One end of the coarse filter structure is communicated with the fine filter structure.

[0022] As an optional solution of the energy-saving rotary furnace with multi-stage heat supply and waste heat utilization described in the present invention, wherein: the coarse filter structure includes an outer shell, a collecting pipe, a support shaft, a rubber impeller, a spiral shaft, a power motor and a filtering inclined plate, a collecting pipe is provided on one side of the outer shell, a support shaft is movably installed inside the collecting pipe, and a rubber impeller is arranged on the outside of the support shaft;

[0023] A spiral shaft is movably installed inside the support shaft, and a power motor is connected to the top end of the spiral shaft. A filtering inclined plate located on one side of the collecting pipe is provided on one side of the inner wall of the outer shell.

[0024] As an optional solution of the energy-saving rotary furnace with multi-stage heat supply and waste heat utilization described in the present invention, wherein: the fine filtration structure includes a filter housing, a liquid inlet end, a liquid outlet end, a filter net bag, a notch, an upper cover and a fixing ring, one side of the filter housing is provided with a liquid inlet end, the other side of the filter housing is provided with a liquid outlet end, a filter net bag is fixedly installed inside the filter housing, one side of the filter net bag is provided with a notch, and the notch is used to be installed on one side of the liquid inlet end;

[0025] An upper cover is fixedly mounted on the top of the filter net bag, and a fixing ring is provided on the lower surface of the upper cover, and the fixing ring is used to fix the filter net bag below the upper cover.

[0026] As an optional solution of the energy-saving rotary furnace with multi-stage heat supply and waste heat utilization of the present invention, wherein: a heat exchange box located on one side of the second furnace body is installed on one side of the fine filter structure, one end of the insulation pipe is used to connect with one end of the heat exchange box, and the heat exchange box is symmetrically provided with sealing plates inside;

[0027] The heat exchange box is provided with heat conducting pipes in two sealing plates. The inner wall of the heat exchange box is provided with a spiral pipe in a spiral shape. One end of the spiral pipe is connected to the insulation pipe.

[0028] As an optional solution for the energy-saving rotary furnace with multi-stage heating and waste heat utilization described in the present invention, the insulation pipe and the conveying pipe are interlaced, the conveying pipe is used to be inserted at the axis of the insulation pipe, and a cavity is provided between the outer side of the conveying pipe and the inside of the insulation pipe, and the cavity is the insulation cavity.

[0029] The heated water is brought into the heat exchange box through the conveying pipe. At the same time, the insulation pipe sends water vapor into the heat exchange box and connects with the spiral tube, so that it moves in a spiral around the inside of the heat exchange box and fills the inside. At this time, the external heat exchange equipment can cooperate with the heat exchange box to export the internal heat for use.

[0030] The present invention has the following beneficial effects:

[0031] 1. The energy-saving rotary kiln with multi-stage heating and waste heat utilization is divided into three combustion chambers, and each combustion chamber is provided with a third heat conduction box, a second heat conduction box and a first heat conduction box. The heat in the combustion chamber is used to heat itself, and the heated water liquid material is transported to the next combustion chamber. By analogy, the preheating operation of the subsequent device is realized, the cavity is preheated, heat is provided, and the temperature in the cavity is increased, which is convenient for the rapid rise of heat during combustion. The three-stage heating method can not only reduce the exhaust gas volume, but also reduce the heat energy loss and the energy required for combustion, thereby ensuring that each section of the furnace is heated evenly.

[0032] 2. This energy-saving rotary kiln with multi-stage heating and waste heat utilization provides heating effect to the device through the third heat conduction box during the preheating process. At the same time, it can also wrap the particulate matter produced after combustion, so that the particulate matter cannot float in the air and finally gathers in the water, completing the particulate matter treatment function.

[0033] 3. The energy-saving rotary furnace with multi-stage heating and waste heat utilization collects the steam heated in the third heat transfer box, the second heat transfer box and the first heat transfer box through the third steam pipe, the second steam pipe and the first steam pipe, and transfers it to the heat exchange box through the insulation pipe. In addition, the heat inside the heat exchange box is further increased under the heating conditions provided by the conveying pipe. The double waste heat transfer treatment maximizes the waste heat recovery effect of the device, thereby realizing the energy saving function. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0035] Figure 2 For the present invention Figure 1 A is a schematic diagram of the local structure.

[0036] Figure 3 It is a schematic diagram of the pipeline connection structure of the third heat recovery box, the second heat recovery box and the first heat recovery box of the present invention.

[0037] Figure 4 It is a schematic diagram of the overall side structure of the present invention.

[0038] Figure 5 It is a schematic diagram of the outer shell structure of the present invention.

[0039] Figure 6 It is a schematic diagram of the filter housing structure of the present invention.

[0040] Figure 7 This is a schematic diagram of the interior of the heat exchange box of the present invention.

[0041] Figure 8 It is a schematic diagram of the internal structure of the thermal insulation pipe of the present invention.

[0042] In the figure: 1, first furnace body; 2, second furnace body; 3, third furnace body; 4, third heat recovery box; 41, third heat conduction box; 42, suction pipe; 43, discharge pipe; 44, heat conduction arc plate; 45, heat conduction fin; 46, second liquid inlet pipe; 47, third steam pipe; 48, delivery pipe; 5, second heat recovery box; 51, second heat conduction box; 52, first liquid inlet pipe; 53, second steam pipe; 54, second liquid outlet pipe; 6, first heat recovery box; 61, first heat conduction box; 62, reflux pipe; 63, first steam pipe; 64, first liquid outlet pipe; 7, stirring structure; 71, flow channel; 72, support frame; 73, rotating shaft; 74 , spiral blade; 75, stirring blade; 8, coarse filtration structure; 81, outer shell; 82, collecting tube; 83, supporting shaft; 84, rubber impeller; 85, spiral shaft; 86, power motor; 87, filter inclined plate; 9, fine filtration structure; 91, filter shell; 92, liquid inlet end; 93, liquid outlet end; 94, filter net bag; 95, notch; 96, upper cover; 97, fixing ring; 11, heat exchange box; 12, sealing plate; 13, heat transfer pipe; 14, spiral tube; 15, insulation pipe; 16, supporting box; 17, conveying plate; 18, gear ring; 19, driving motor; 21, third combustion end; 22, second combustion end; 23, first combustion end. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] See also Figure 1-Figure 8 , one of which is an energy-saving rotary furnace with multi-stage heat supply and waste heat utilization, comprising a first furnace body 1, a second furnace body 2 is installed at one end of the first furnace body 1, a third furnace body 3 is installed at one end of the second furnace body 2, and support boxes 16 are also installed at both ends of the second furnace body 2. The support box 16 is used to provide a rotation connection between the first furnace body 1 and the second furnace body 2 and the third furnace body 3. The first furnace body 1 and one end of the second furnace body 2 and the third furnace body 3 are all installed with a first combustion end 23;

[0046] The first furnace body 1, the second furnace body 2 and one end of the third furnace body 3 are respectively provided with a third combustion end 21, a second combustion end 22 and a first combustion end 23;

[0047] A conveying plate 17 is fixedly installed inside the supporting box 16, and the conveying plate 17 is used to receive the material conveyance between the first furnace body 1 and the second furnace body 2 and between the second furnace body 2 and the third furnace body 3;

[0048] The first furnace body 1, the second furnace body 2 and the third furnace body 3 are all equipped with a first heat recovery box 6, a second heat recovery box 5 and a third heat recovery box 4 respectively. The third heat recovery box 4 has the same structure as the second heat recovery box 5 and the first heat recovery box 6. The third heat recovery box 4 includes a third heat conduction box 41, a suction pipe 42 and a discharge pipe 43. The third heat conduction box 41 is fixedly installed at the top of the third furnace body 3. The suction pipe 42 is fixedly installed inside the third heat conduction box 41. One end of the suction pipe 42 is provided with a discharge pipe 43, and the lower end of the discharge pipe 43 is used to extend to the top of the third combustion end 21.

[0049] The third heat recovery tank 4 , the second heat recovery tank 5 and the first heat recovery tank 6 are all filled with liquid;

[0050] The third heat recovery box 4 further includes a heat-conducting arc plate 44 and heat-conducting fins 45. The heat-conducting arc plate 44 is disposed at the lower end of the suction pipe 42. The heat-conducting fins 45 are arranged on the upper surface of the heat-conducting arc plate 44. The heat-conducting fins 45 are used to extend to the interior of the third heat-conducting box 41.

[0051] A gear ring 18 is installed below the first furnace body 1, the second furnace body 2 and the third furnace body 3. A drive motor 19 is installed at the lower end of the gear ring 18. The drive motor 19 is used to mesh with the tooth grooves of the gear ring 18.

[0052] A stirring structure 7 is provided inside the discharge pipe 43, and the stirring structure 7 includes a flow channel 71, a support frame 72, a rotating shaft 73, a spiral blade 74 and a stirring blade 75. The flow channel 71 is provided inside the rotating shaft 73, and a support frame 72 is provided at the bottom end of the flow channel 71. The rotating shaft 73 is rotatably installed inside the support frame 72, and a spiral blade 74 is provided at the top end of the rotating shaft 73, and a stirring blade 75 is provided at the lower end of the rotating shaft 73.

[0053] The working principle of the third heat recovery box 4 is as follows: the waste materials inside the first furnace body 1, the second furnace body 2 and the third furnace body 3 are burned by the third combustion end 21, the second combustion end 22 and the first combustion end 23. When the waste materials are burned, the particles formed after the combustion will be affected by the flame heat wave sprayed by the third combustion end 21 and will be turned over in the device. At this time, the particles turned over in the device will be absorbed by the negative pressure suction effect of the suction pipe 42 and transported to the inside of the third heat conduction box 41 by the discharge pipe 43. The inside of the third heat conduction box 41 is filled with liquid. When the particles come into contact with the liquid, the characteristics of the liquid make the particles sticky and adhere to each other, and increase their own weight. The particles are gathered in the water through the encapsulation of the water and cannot float in the air, and the cleaning operation of the particles is completed.

[0054] Heat recovery: When the third combustion end 21 sprays flames, the heat generated will directly contact the lower surface of the heat-conducting arc plate 44. At this time, the heat-conducting arc plate 44 will transfer the heat to the inside of the third heat-conducting box 41 through the heat-conducting fins 45, and provide a heating effect for the water inside the third heat-conducting box 41. The heated water can be transported to its equipment through pipelines for heat recovery;

[0055] When the exhaust gas mixed with particulate matter is transported to the third heat conduction box 41 through the exhaust pipe 43, when it passes through the flow channel 71, it will form a wave effect on the spiral blade 74, causing it to rotate, and support the rotating shaft 73 to drive the stirring blade 75 to rotate in the water liquid, and stir the water liquid to make it turn over. The function of the stirring structure 7 is to form bubbles when the exhaust gas enters the water liquid, and the bubbles contain particulate matter. The bubbles are broken up by the stirring of the stirring blade 75, so that the water liquid and the particulate matter are fully in contact, thereby achieving the interference effect on the particulate matter.

[0056] Example 2

[0057] This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1-Figure 8 The second heat recovery box 5 includes a second heat conduction box 51, a first liquid inlet pipe 52 and a second steam pipe 53. The second heat conduction box 51 has the same internal structure as the third heat conduction box 41. The first liquid inlet pipe 52 is fixedly installed at one end of the second heat conduction box 51.

[0058] A second liquid outlet pipe 54 is fixedly installed at the other end of the second heat conduction box 51, and a second steam pipe 53 located at the other end of the second heat conduction box 51 is fixedly installed at the upper end of the second liquid outlet pipe 54;

[0059] A second liquid inlet pipe 46 is fixedly installed at one end of the third heat-conducting box 41, a delivery pipe 48 is fixedly installed at the other end of the third heat-conducting box 41, and a third steam pipe 47 located at the other end of the third heat-conducting box 41 is installed at the upper end of the delivery pipe 48;

[0060] The first heat recovery box 6 includes a first heat conduction box 61, a reflux pipe 62, a first steam pipe 63 and a first liquid outlet pipe 64. The first heat conduction box 61 is fixedly installed inside the first furnace body 1, the reflux pipe 62 is fixedly installed at one end of the first heat conduction box 61, the first liquid outlet pipe 64 is fixedly installed at the other end of the first heat conduction box 61, and the reflux pipe 62 located at the other end of the first heat conduction box 61 is fixedly installed at the upper end of the first liquid outlet pipe 64;

[0061] The first liquid outlet pipe 64 is connected to the first liquid inlet pipe 52, and the second liquid outlet pipe 54 is connected to the second liquid inlet pipe 46;

[0062] The third steam pipe 47, the second steam pipe 53 and the first steam pipe 63 are connected to form an exhaust pipe, and a heat preservation pipe 15 is fixedly installed at the lower end of the exhaust pipe;

[0063] A high-pressure delivery pump is installed at one end of the first liquid outlet pipe 64 and the second liquid outlet pipe 54 , and a high-pressure delivery pump is installed at one side of the exhaust pipe.

[0064] The first furnace body 1, the second furnace body 2 and the third furnace body 3 have the same internal structure. After the first heat recovery box 6 is heated and absorbs particulate matter, the first heat conduction box 61 is heated and boiled. The boiled water is transported to the first liquid inlet pipe 52 through the first liquid outlet pipe 64, and then transported to the second heat conduction box 51 through the first liquid inlet pipe 52, so that the heat inside the first heat conduction box 61 is sent to the second heat conduction box 51, forming a heating effect on the inside of the second heat conduction box 51, so that the inside of the second heat conduction box 51 provides heat before combustion, increases the temperature in the cavity, and facilitates the rise of heat during combustion, thereby reducing the time required for combustion, and then the heat inside the second heat conduction box 51 is transferred to the inside of the third heat conduction box 41 through the second liquid outlet pipe 54 through the second liquid inlet pipe 46, completing the preheating effect of the subsequent work;

[0065] The device is divided into three combustion chambers, and each combustion chamber is provided with a third heat conduction box 41, a second heat conduction box 51 and a first heat conduction box 61. The device heats itself by utilizing the heat in the combustion chamber, and at the same time, the heated water liquid material is transported to the next combustion chamber, and so on, so as to realize the preheating operation of the subsequent device, preheat the cavity, provide heat, increase the temperature in the cavity, facilitate the rapid rise of heat during combustion, and reduce the energy required for combustion;

[0066] The three-stage rotary kiln has a combustion and heating chamber at the interface of each section. The three-stage heating method can not only reduce the amount of exhaust gas, but also reduce heat energy loss, ensuring that each section of the furnace can be heated evenly.

[0067] Example 3

[0068] This embodiment is an improvement made on the basis of embodiment 2. For details, please refer to Figure 1-Figure 8 A coarse filter structure 8 is fixedly installed on one side of the second furnace body 2, a fine filter structure 9 is fixedly installed on one side of the coarse filter structure 8, and one end of the delivery pipe 48 is connected to one side of the coarse filter structure 8;

[0069] One end of the coarse filter structure 8 is connected to the fine filter structure 9;

[0070] The coarse filter structure 8 includes an outer shell 81, a collecting pipe 82, a support shaft 83, a rubber impeller 84, a spiral shaft 85, a power motor 86 and a filtering inclined plate 87. The collecting pipe 82 is provided on one side of the outer shell 81. The supporting shaft 83 is movably installed inside the collecting pipe 82. The rubber impeller 84 is arranged on the outer side of the supporting shaft 83.

[0071] A screw shaft 85 is movably installed inside the support shaft 83 , and a power motor 86 is connected to the top of the screw shaft 85 . A filtering inclined plate 87 located on one side of the collecting pipe 82 is provided on one side of the inner wall of the outer shell 81 .

[0072] The water is transported to the interior of the outer shell 81 through the transport pipe 48, and the transport pipe 48 is located on one side of the outer shell 81 and according to Figure 5 As shown, when water enters, it will rotate counterclockwise along the inner wall of the outer shell 81, and generate centrifugal force while rotating, so that the particles will be thrown outward, and the passing water will be filtered by the filter inclined plate 87, and the internal particles will be removed and gathered between the two rubber impellers 84. Through the rotation of the power motor 86, the spiral shaft 85 drives the support shaft 83 to fall rapidly, so that the rubber impeller 84 mixed with particles falls and discharges the particles. In this way, the particles in the water can be discharged without stopping the machine.

[0073] Example 4

[0074] This embodiment is an improvement made on the basis of embodiment 3. For details, please refer to Figure 1-Figure 8 The fine filter structure 9 includes a filter housing 91, a liquid inlet end 92, a liquid outlet end 93, a filter net bag 94, a notch 95, an upper cover 96 and a fixing ring 97. The filter housing 91 is provided with a liquid inlet end 92 on one side, and a liquid outlet end 93 on the other side. The filter housing 91 is provided with a filter net bag 94 fixedly installed inside, and a notch 95 is provided on one side of the filter net bag 94. The notch 95 is used to be installed on one side of the liquid inlet end 92.

[0075] An upper cover 96 is fixedly mounted on the top of the filter net bag 94 , and a fixing ring 97 is provided on the lower surface of the upper cover 96 . The fixing ring 97 is used to fix the filter net bag 94 below the upper cover 96 .

[0076] Finally, the water passes through the interior of the filter shell 91, and when entering, it will follow the slot 95 into the interior of the filter net bag 94. The filter net bag 94 can finely filter the particulate matter in the water and collect it inside. After the filter net bag 94 completes the collection, the upper cover 96 can be pulled up to directly take out the filter net bag 94 as a whole, and it can be cleaned or directly kept for replacement.

[0077] Example 5

[0078] This embodiment is an improvement made on the basis of embodiment 4. For details, please refer to Figure 1-Figure 8 A heat exchange box 11 located on one side of the second furnace body 2 is installed on one side of the fine filter structure 9, one end of the insulation pipe 15 is used to connect with one end of the heat exchange box 11, and a sealing plate 12 is symmetrically arranged inside the heat exchange box 11;

[0079] The heat exchange box 11 is provided with heat conducting pipes 13 located in two sealing plates 12. The inner wall of the heat exchange box 11 is provided with a spiral pipe 14 in a spiral shape. One end of the spiral pipe 14 is connected to the insulation pipe 15.

[0080] The insulation pipe 15 and the delivery pipe 48 are interlaced. The delivery pipe 48 is used to be inserted into the axis of the insulation pipe 15. A cavity is provided between the outer side of the delivery pipe 48 and the inner side of the insulation pipe 15, and the cavity is the insulation cavity.

[0081] The heated water is brought into the interior of the heat exchange box 11 through the delivery pipe 48, and at the same time, the insulation pipe 15 sends water vapor into the interior of the heat exchange box 11 and is connected to the spiral tube 14, so that it moves in a spiral around the interior of the heat exchange box 11 and fills the interior. At this time, the external heat exchange equipment can cooperate with the heat exchange box 11 to export the internal heat for use.

[0082] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0083] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An energy-saving rotary furnace with multi-stage heat supply and waste heat utilization, comprising a first furnace body (1), characterized in that: A second furnace body (2) is mounted on one end of the first furnace body (1), a third furnace body (3) is mounted on one end of the second furnace body (2), support boxes (16) are mounted on both ends of the second furnace body (2), and the support boxes (16) are used to provide a rotational connection between the first furnace body (1) and the second furnace body (2) and the third furnace body (3), and a first combustion end (23) is mounted on one end of the first furnace body (1) and the second furnace body (2) and the third furnace body (3); The first furnace body (1), the second furnace body (2) and one end of the third furnace body (3) are respectively provided with a third combustion end (21), a second combustion end (22) and a first combustion end (23); A conveying plate (17) is fixedly installed inside the supporting box (16), and the conveying plate (17) is used to receive the material conveyance between the first furnace body (1) and the second furnace body (2) and between the second furnace body (2) and the third furnace body (3); The first furnace body (1), the second furnace body (2) and the third furnace body (3) are each correspondingly provided with a first heat recovery box (6), a second heat recovery box (5) and a third heat recovery box (4); the third heat recovery box (4) has the same structure as the second heat recovery box (5) and the first heat recovery box (6); the third heat recovery box (4) comprises a third heat conduction box (41), a suction pipe (42) and a discharge pipe (43); the third heat conduction box (41) is fixedly provided at the top of the third furnace body (3); the suction pipe (42) is fixedly provided inside the third heat conduction box (41); one end of the suction pipe (42) is provided with a discharge pipe (43), and the lower end of the discharge pipe (43) is used to extend to the top of the third combustion end (21); The third heat recovery tank (4), the second heat recovery tank (5) and the first heat recovery tank (6) are all filled with liquid.

2. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 1 is characterized in that: The third heat recovery box (4) further comprises a heat-conducting arc plate (44) and heat-conducting fins (45); the lower end of the suction pipe (42) is provided with a heat-conducting arc plate (44); the upper surface of the heat-conducting arc plate (44) is arranged with heat-conducting fins (45); the heat-conducting fins (45) are used to extend to the interior of the third heat-conducting box (41); A gear ring (18) is installed below the first furnace body (1), the second furnace body (2) and the third furnace body (3), and a drive motor (19) is installed at the lower end of the gear ring (18). The drive motor (19) is used to mesh with the teeth of the gear ring (18).

3. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 2 is characterized in that: The discharge pipe (43) is provided with a stirring structure (7) inside, and the stirring structure (7) comprises a flow channel (71), a support frame (72), a rotating shaft (73), a spiral blade (74) and a stirring blade (75); the flow channel (71) is provided inside the rotating shaft (73); the bottom end of the flow channel (71) is provided with a supporting frame (72); the inside of the supporting frame (72) is rotatably mounted with a rotating shaft (73); the top end of the rotating shaft (73) is provided with a spiral blade (74); and the lower end of the rotating shaft (73) is provided with a stirring blade (75).

4. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 3 is characterized in that: The second heat recovery box (5) comprises a second heat conduction box (51), a first liquid inlet pipe (52) and a second steam pipe (53); the second heat conduction box (51) has the same internal structure as the third heat conduction box (41); and the first liquid inlet pipe (52) is fixedly mounted on one end of the second heat conduction box (51); A second liquid outlet pipe (54) is fixedly mounted on the other end of the second heat conduction box (51), and a second steam pipe (53) located at the other end of the second heat conduction box (51) is fixedly mounted on the upper end of the second liquid outlet pipe (54); A second liquid inlet pipe (46) is fixedly mounted on one end of the third heat conducting box (41), a delivery pipe (48) is fixedly mounted on the other end of the third heat conducting box (41), and a third steam pipe (47) located at the other end of the third heat conducting box (41) is mounted on the upper end of the delivery pipe (48); The first heat recovery box (6) comprises a first heat conduction box (61), a return pipe (62), a first steam pipe (63) and a first liquid outlet pipe (64); the first heat conduction box (61) is fixedly installed inside the first furnace body (1); the return pipe (62) is fixedly installed at one end of the first heat conduction box (61); the first liquid outlet pipe (64) is fixedly installed at the other end of the first heat conduction box (61); and the return pipe (62) located at the other end of the first heat conduction box (61) is fixedly installed at the upper end of the first liquid outlet pipe (64).

5. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 4 is characterized in that: The first liquid outlet pipe (64) is connected to the first liquid inlet pipe (52), and the second liquid outlet pipe (54) is connected to the second liquid inlet pipe (46); The third steam pipe (47), the second steam pipe (53) and the first steam pipe (63) are connected to form an exhaust pipe, and a heat preservation pipe (15) is fixedly installed at the lower end of the exhaust pipe; A high-pressure delivery pump is installed at one end of each of the first liquid outlet pipe (64) and the second liquid outlet pipe (54), and a high-pressure delivery pump is installed at one side of the exhaust pipe.

6. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 5 is characterized in that: A coarse filter structure (8) is fixedly mounted on one side of the second furnace body (2), a fine filter structure (9) is fixedly mounted on one side of the coarse filter structure (8), and one end of the delivery pipe (48) is connected to one side of the coarse filter structure (8); One end of the coarse filter structure (8) is connected to the fine filter structure (9).

7. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 6 is characterized in that: The coarse filtering structure (8) comprises an outer shell (81), a collecting pipe (82), a supporting shaft (83), a rubber impeller (84), a spiral shaft (85), a power motor (86) and a filtering inclined plate (87); a collecting pipe (82) is provided on one side of the outer shell (81); a supporting shaft (83) is movably installed inside the collecting pipe (82); and a rubber impeller (84) is arranged on the outer side of the supporting shaft (83); A screw shaft (85) is movably mounted inside the support shaft (83), and a power motor (86) is connected to the top end of the screw shaft (85). A filtering inclined plate (87) located on one side of the collecting pipe (82) is provided on one side of the inner wall of the outer shell (81).

8. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 7 is characterized in that: The fine filter structure (9) comprises a filter housing (91), a liquid inlet end (92), a liquid outlet end (93), a filter net bag (94), a notch (95), an upper cover (96) and a fixing ring (97); one side of the filter housing (91) is provided with a liquid inlet end (92); the other side of the filter housing (91) is provided with a liquid outlet end (93); a filter net bag (94) is fixedly installed inside the filter housing (91); one side of the filter net bag (94) is provided with a notch (95); the notch (95) is used to be installed on one side of the liquid inlet end (92); An upper cover (96) is fixedly mounted on the top of the filter net bag (94), and a fixing ring (97) is provided on the lower surface of the upper cover (96). The fixing ring (97) is used to fix the filter net bag (94) below the upper cover (96).

9. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 8, characterized in that: A heat exchange box (11) located on one side of the second furnace body (2) is installed on one side of the fine filter structure (9); one end of the insulation pipe (15) is used to be connected to one end of the heat exchange box (11); and a sealing plate (12) is symmetrically provided inside the heat exchange box (11); The heat exchange box (11) is internally arranged with heat conduction pipes (13) located in two sealing plates (12), and the inner wall of the heat exchange box (11) is provided with a spiral pipe (14) in a spiral shape, and one end of the spiral pipe (14) is connected to the insulation pipe (15).

10. The energy-saving rotary kiln with multi-stage heat supply and waste heat utilization according to claim 9, characterized in that: The insulation pipe (15) and the delivery pipe (48) are interlaced, the delivery pipe (48) is used to be inserted into the axis of the insulation pipe (15), and a cavity is provided between the outer side of the delivery pipe (48) and the inside of the insulation pipe (15), and the cavity is a insulation cavity. The heated water liquid is brought into the interior of the heat exchange box (11) through the delivery pipe (48), and at the same time, the heat preservation pipe (15) sends water vapor into the interior of the heat exchange box (11) and is connected to the spiral tube (14), so that it moves in a spiral around the interior of the heat exchange box (11) and fills the interior. At this time, the external heat exchange equipment can cooperate with the heat exchange box (11) to export the internal heat for use.

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