Industrial waste salt calcining furnace system with waste heat recovery function and use method

Abstract

The present invention relates to the technical field of heat energy recovery, and discloses an industrial waste salt calcining furnace system with a waste heat recovery function and a method of using the system, comprising a preheating chamber and a calcining chamber, wherein a connecting channel is installed between the preheating chamber and the calcining chamber, a filtering mechanism is arranged at one end of the calcining chamber, and the filtering mechanism is used to filter the gas products of the calcining process, and heat circulation mechanisms are arranged outside the preheating chamber and the calcining chamber, and the heat circulation mechanisms include a first heat utilization channel and a second heat utilization channel, and the heat circulation mechanisms are used to circulate the high temperature in the gas products after calcination; the present invention utilizes the heat of the high-temperature flue gas by arranging the first heat utilization channel and the second heat utilization channel, so that the heat of the high-temperature flue gas can be stored and utilized through a phase change material layer and an atomized water channel, and the internal industrial waste salt and combustion agent mixture can also be preheated when passing through the preheating chamber, and the energy utilization rate is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat energy recovery, and in particular, relates to an industrial waste salt calcining furnace system with waste heat recovery function and a use method thereof. Background Art

[0002] A large amount of acidic and alkaline substances are used in chemical production. When these acids and alkalis react with each other, a large amount of waste salt residue will be produced, which is collectively called industrial waste salt. The specific composition of industrial waste salt varies depending on its source, but it usually contains a large amount of organic matter that is difficult to separate, and it is easy to release strong irritating odors or even contain highly toxic substances. It is a typical hazardous waste and has great environmental harm. Therefore, research on the treatment of industrial waste salt cannot be ignored.

[0003] At present, industrial waste salt is mainly treated by landfill and discharge into the sea. Landfill is the main method of disposing industrial waste salt at present. However, waste salt landfill has disadvantages such as large one-time investment, large land occupation and high landfill cost. In addition, if the protection leaks after the waste salt is landfilled, it will pollute the surrounding atmosphere, surface runoff, groundwater and soil. Discharge of industrial waste salt into the sea has been applied in some countries and regions near the ocean, but it is not applicable to most parts of my country. Both landfill and discharge into the sea have limitations, the hidden dangers of waste salt have not been fundamentally solved, and industrial waste salt contains a large amount of usable resource materials. It is urgent to realize the resource treatment of industrial waste salt.

[0004] The high temperature treatment method has attracted wide attention due to its advantages such as high efficiency in removing organic matter and simple treatment process. The high temperature treatment method is to roast the waste salt under high temperature conditions, with the temperature not less than 500°C. The incineration equipment used generally includes boiling furnaces, rotary kilns, etc. At high temperatures, a small amount of organic matter contained in the waste salt will decompose into gas, achieving the effect of removal. However, at high temperatures, salt is prone to melting, ringing, and agglomeration, causing the equipment to not operate normally. The existing high temperature treatment equipment also has problems such as high energy consumption and low efficiency, which makes the cost of industrial waste salt treatment high and the equipment cannot operate stably and effectively for a long time.

[0005] A Chinese patent with authorization announcement number CN215637207U discloses an industrial waste salt incineration disposal system, including a rotary kiln pyrolysis furnace, the gas outlet of the rotary kiln pyrolysis furnace is connected to a high-temperature dust collector, the exhaust port of the high-temperature dust collector is connected to the incinerator, the flue gas outlet of the incinerator is connected to a waste heat recovery boiler, a semi-dry quenching tower, and a bag dust collector in sequence, and the gas outlet of the bag dust collector is connected to an alkali washing tower; the solid outlet of the rotary kiln pyrolysis furnace and the solid outlet of the high-temperature dust collector are connected to a neutralization tank, and the neutralization tank is connected to a sedimentation tank and a filter in sequence. This scheme can effectively remove the organic components of industrial waste salt and turn it into clean inorganic salt powder for recycling and comprehensive utilization or hydrolysis and harmless treatment.

[0006] However, this technical solution still has at least the following defects: the heat recovery in this solution depends on the recovery boiler, which cannot preheat the industrial waste salt before combustion, and during the treatment process, although the bag filter can effectively separate solid particles, it cannot discharge the intercepted solid particles by itself after long-term use, resulting in reduced separation effect. In view of this, the present invention is proposed. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides an industrial waste salt calcining furnace system with waste heat recovery function and a use method. The heat of the high-temperature flue gas is utilized by setting a first heat utilization channel and a second heat utilization channel, so that it can be stored and utilized through a phase change material layer and an atomized water channel, and the internal industrial waste salt and combustion agent mixture can be preheated when passing through a preheating chamber. The energy utilization rate is high, and the gas product is filtered by setting a filtering mechanism, and the attached solid particulate matter is cleaned in time during filtering, which effectively extends the service life of the filtering mechanism and ensures the separation effect.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] An industrial waste salt calcining furnace system with a waste heat recovery function comprises a preheating chamber and a calcining chamber, wherein a connecting channel is installed between the preheating chamber and the calcining chamber, a filtering mechanism is arranged at one end of the calcining chamber, and the filtering mechanism is used to filter the gas products of the calcining process, and a heat circulation mechanism is arranged outside the preheating chamber and the calcining chamber, and the heat circulation mechanism comprises a first heat utilization channel and a second heat utilization channel, wherein the first heat utilization channel is sleeved on the outside of the preheating chamber, and the second heat utilization channel is sleeved on the outside of the calcining chamber, and the heat circulation mechanism is used to circulate the high temperature in the gas products after calcination.

[0010] As a preferred embodiment of the present invention, a feeding mechanism is provided inside the preheating chamber, and the feeding mechanism is used to transport fuel and industrial waste salt. The feeding mechanism includes a spiral blade, and the spiral blade is installed at the inner bottom of the preheating chamber. One end of the spiral blade movably penetrates the preheating chamber through the transmission shaft and extends to the outside. A weight sensor is installed at the bottom of the preheating chamber, and a first power device is installed at the outer end of the preheating chamber. The output end of the first power device is fixedly connected to the transmission shaft of the spiral blade. A partition is installed inside the preheating chamber near one end of the calcining chamber, and a groove is opened at the bottom of the partition, and the groove is adapted to the cross-sectional shape and size of the spiral blade.

[0011] As a preferred embodiment of the present invention, a heating mechanism is provided outside the calcining chamber, and the heating mechanism is used to heat the calcining chamber. The heating mechanism includes a heating resistor, and the heating resistor is wound around the outside of the calcining chamber. A heat utilization mechanism is provided outside the heating resistor, and the heat utilization mechanism includes a phase change material layer, and an atomizing water channel is inserted inside the phase change material layer. A diffusion metal plate is installed on the side of the atomizing water channel, and the diffusion metal plate is inserted into the phase change material layer.

[0012] As a preferred embodiment of the present invention, a heat utilization enhancement mechanism is provided on the outer side of the preheating chamber and the phase change material layer, and the heat utilization enhancement mechanism is used to enhance heat transfer. The heat utilization enhancement mechanism includes a first fin plate group and a second fin plate group. The first fin plate group is located between the preheating chamber and the first heat utilization channel, and the second fin plate group is located between the phase change material layer and the second heat utilization channel.

[0013] As a preferred embodiment of the present invention, a discharge pipe is installed at the bottom of the calcining chamber, a control valve is installed on the top of the discharge pipe, a collecting chamber is installed at the bottom of the discharge pipe, a transportation mechanism is arranged inside the collecting chamber, the transportation mechanism comprises a transportation belt, a third power device is installed on the side of the transportation belt, the third power device is installed outside the collecting chamber, and the transportation mechanism transports the calcined solid product to one end of the collecting chamber through the transportation belt.

[0014] As a preferred embodiment of the present invention, conduits are installed at both ends of the filtering mechanism, one end of one of the conduits is installed at the top of the collecting chamber, and a suction fan is installed at one end of the other conduit, and the suction fan is connected to the second heat utilization channel. The suction force generated by the suction fan causes the high-temperature gas product to enter the second heat utilization channel after being filtered by the filtering mechanism.

[0015] As a preferred embodiment of the present invention, the filtering mechanism includes a plurality of separation blocks, a gap is maintained between two adjacent separation blocks, and scrapers are slidably installed, both ends of the plurality of scrapers are rotatably connected with a first connecting ring, one side of the first connecting ring is fixedly installed with a first gear ring, the first gear ring is an inner gear ring, the inner and outer sides of the plurality of separation blocks are respectively fixedly installed with an outer fixed ring and an inner fixed ring, and a fixing part is installed between the outer fixed ring and the inner fixed ring, a second connecting ring is rotatably connected between the outer fixed ring and the inner fixed ring, one side of the second connecting ring is rotatably installed with a first gear, and the first gear is meshingly connected with the first gear ring.

[0016] As a preferred embodiment of the present invention, a second gear ring is fixedly installed on the other side of the second connecting ring, and the second gear ring is an external gear ring. A fourth power device is fixedly installed on one side of the outer fixed ring. Second gears are installed on the output shafts at both ends of the fourth power device. The second gear is meshingly connected with the second gear ring. A closing mechanism is arranged between two adjacent separation blocks, and the closing mechanism includes a baffle plate, which is rotatably connected to the separation block, and a torsion spring is installed at the rotatable connection between the baffle plate and the separation block.

[0017] As a preferred embodiment of the present invention, a stirring mechanism is provided inside the calcining chamber, and the stirring mechanism includes a rotating shaft, a bracket is fixedly installed on the side of the rotating shaft, a scraper is installed on the bracket, and the scraper is in close contact with the inner wall of the calcining chamber, a second power device is installed at one end of the calcining chamber, and the output end of the second power device is fixedly connected to the rotating shaft, and a temperature sensor and a pressure sensor are embedded at one end of the calcining chamber.

[0018] As a preferred embodiment of the present invention, a pressurizing mechanism is arranged between the second heat utilization channel and the first heat utilization channel, and the pressurizing mechanism includes a high-pressure fan, a second connecting pipe is installed at one end of the high-pressure fan, a third connecting pipe is installed at one end of the second connecting pipe, the third connecting pipe is connected to the calcination chamber, an air outlet pipe is installed at one end of the second heat utilization channel, one end of the air outlet pipe is connected to the first heat utilization channel, an electromagnetic valve is installed on the air outlet pipe, a first connecting pipe is installed on the electromagnetic valve, and one end of the first connecting pipe is connected to the high-pressure fan.

[0019] As a preferred embodiment of the present invention, a waste salt inlet and a fuel inlet are installed at one end of the preheating chamber, an exhaust gas treatment device is fixedly installed on the outside of the first heat utilization channel, and the exhaust gas treatment device is connected to the first heat utilization channel through a pipeline.

[0020] The present invention also discloses a method for using an industrial waste salt calcining furnace system with a waste heat recovery function. The steps of the method for using the industrial waste salt calcining furnace system with a waste heat recovery function are as follows:

[0021] S1, conveying waste salt and fuel through the waste salt inlet and the fuel inlet, and conveying the mixture of waste salt and fuel into the calcining chamber through the feeding mechanism;

[0022] S2, heating the calcining chamber by a heating mechanism, stirring the internal material by a stirring mechanism to fully calcine it, and after the calcination is completed, the control valve is opened to allow the material to enter the collecting chamber;

[0023] S3, start the suction fan, the suction force generated causes the gas product to enter the filtering mechanism, after the solid particles are separated by the filtering mechanism, the gas product enters the second heat utilization channel for heat utilization, so that the phase change material layer undergoes phase change after being heated, and stores heat, and heats the atomized water channel, so that the atomized water forms water vapor for heat storage;

[0024] S4, the gas after passing through the second heat utilization channel is blown by a high-pressure blower and blown into the calcining chamber, thereby removing the residual ash in the calcining chamber;

[0025] S5. The gas after the ash is removed passes through the filtering mechanism and then passes through the second heat utilization channel again, and enters the first heat utilization channel to achieve preheating of the preheating chamber.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention utilizes the heat of high-temperature flue gas by setting a first heat utilization channel and a second heat utilization channel, so that the heat can be stored and utilized through the phase change material layer and the atomized water channel, and the internal industrial waste salt and combustion agent mixture can be preheated when passing through the preheating chamber, and the energy utilization rate is high;

[0028] The present invention filters the gas product by arranging a filtering mechanism, and timely cleans the attached solid particles during filtering, thereby effectively extending the service life of the filtering mechanism and ensuring the separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of an industrial waste salt calcining furnace system with waste heat recovery function according to the present invention;

[0030] Figure 2 This is a structural schematic diagram of the high-pressure fan of the present invention;

[0031] Figure 3 This is a schematic diagram of the internal structure of the first heat utilization channel of the present invention;

[0032] Figure 4 This is a schematic structural diagram of the first fin plate group of the present invention;

[0033] Figure 5 This is a schematic diagram of the internal structure of the preheating chamber of the present invention;

[0034] Figure 6 This is a schematic diagram of the internal structure of the second heat utilization channel of the present invention;

[0035] Figure 7 This is a schematic diagram of the atomization water channel structure of the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the heating resistor of the present invention;

[0037] Fig. 9 This is a schematic diagram of the internal structure of the calcining chamber of the present invention;

[0038] Fig.10 This is a structural schematic diagram of the suction fan of the present invention;

[0039] Fig.11 It is a schematic diagram of the structure of the second gear ring of the present invention;

[0040] Fig.12 This is a schematic diagram of the structure of the first gear of the present invention;

[0041] Fig.13 It is a schematic structural diagram of the separation block and the scraper blade in the separation state of the present invention.

[0042] Reference numerals:

[0043] 100, preheating chamber; 101, first fin plate group; 102, first heat utilization channel; 103, connecting channel; 104, first power device; 105, spiral blade; 106, partition; 107, waste salt inlet; 108, combustion agent inlet; 109, tail gas treatment device;

[0044] 200, calcining chamber; 201, heating resistor; 202, phase change material layer; 203, atomized water channel; 204, diffusion metal plate; 205, second fin plate group; 206, second heat utilization channel; 207, second power device; 208, rotating shaft; 209, bracket; 210, scraper; 211, temperature sensor; 212, pressure sensor;

[0045] 300, discharge pipe; 301, control valve; 302, collection chamber; 303, transport belt; 304, third power device; 305, conduit; 306, suction fan;

[0046] 400, outer fixed ring; 401, inner fixed ring; 402, separation block; 403, scraper; 404, first connecting ring; 405, first gear ring; 406, first gear; 407, second connecting ring; 408, second gear ring; 409, second gear; 410, fourth power device; 411, fixing member; 412, baffle; 413, torsion spring;

[0047] 500, air outlet pipe; 501, solenoid valve; 502, first connecting pipe; 503, high-pressure blower; 504, second connecting pipe; 505, third connecting pipe. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0049] Example 1

[0050] like Figures 1 to 13 As shown, an industrial waste salt calcining furnace system with a waste heat recovery function includes a preheating chamber 100 and a calcining chamber 200. A connecting channel 103 is installed between the preheating chamber 100 and the calcining chamber 200. A filtering mechanism is arranged at one end of the calcining chamber 200. The filtering mechanism is used to filter the gas products of the calcining process. A thermal circulation mechanism is arranged outside the preheating chamber 100 and the calcining chamber 200. The thermal circulation mechanism includes a first heat utilization channel 102 and a second heat utilization channel 206. The first heat utilization channel 102 is sleeved on the outside of the preheating chamber 100, and the second heat utilization channel 206 is sleeved on the outside of the calcining chamber 200. The thermal circulation mechanism is used to recycle the high temperature in the gas products after calcination.

[0051] like Figure 1 , Figure 5 As shown, in a specific embodiment, a feeding mechanism is provided inside the preheating chamber 100, and the feeding mechanism is used to transport the combustion agent and industrial waste salt. The feeding mechanism includes a spiral blade 105, and the spiral blade 105 is installed at the inner bottom of the preheating chamber 100. One end of the spiral blade 105 passes through the preheating chamber 100 and extends to the outside through a transmission shaft. A weight sensor is installed at the bottom of the preheating chamber 100, and a first power device 104 is installed at the outer end of the preheating chamber 100. The output end of the first power device 104 is fixedly connected to the transmission shaft of the spiral blade 105. A partition 106 is installed inside the preheating chamber 100 near one end of the calcining chamber 200, and a groove is opened at the bottom of the partition 106. The groove is adapted to the cross-sectional shape and size of the spiral blade 105. In this configuration, the first power device 104 is started, and the first power device 104 drives the spiral blade 105 to rotate. The spiral blade 105 transports the waste salt and the fuel mixture stored in the preheating chamber 100 to the connecting channel 103, and enters the calcining chamber 200 under the action of gravity. The weight sensor detects the weight reduction of the waste salt and the fuel mixture each time to determine the weight transported into the calcining chamber 200.

[0052] like Figure 6-Figure 8As shown, further, a heating mechanism is arranged outside the calcining chamber 200, and the heating mechanism is used to heat and raise the temperature of the calcining chamber 200. The heating mechanism includes a heating resistor 201, and the heating resistor 201 is wound around the outside of the calcining chamber 200. A heat utilization mechanism is arranged outside the heating resistor 201, and the heat utilization mechanism includes a phase change material layer 202, and an atomized water channel 203 is inserted inside the phase change material layer 202. A diffusion metal plate 204 is installed on the side of the atomized water channel 203, and the diffusion metal plate 204 is inserted into the phase change material layer 202. In this setting, the heating resistor 201 heats the calcining chamber 200 at a high temperature, so that the waste salt is calcined at a high temperature, and the phase change material layer 202 is heated by the heating resistor 201. At this time, atomized water is introduced into the atomized water channel 203, and the atomized water channel 203 is heated by the phase change material layer 202 to convert the atomized water into water vapor, thereby realizing energy utilization.

[0053] like Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 8 As shown, further, the preheating chamber 100 and the outer side of the phase change material layer 202 are both provided with a heat utilization strengthening mechanism, which is used to strengthen heat transfer, and the heat utilization strengthening mechanism includes a first fin plate group 101 and a second fin plate group 205, the first fin plate group 101 is located between the preheating chamber 100 and the first heat utilization channel 102, and the second fin plate group 205 is located between the phase change material layer 202 and the second heat utilization channel 206. In this setting, the inner ring and the outer ring of the first fin plate group 101 are both annular, the middle layer is arranged in a corrugated shape, annular shape, and corrugated shape in sequence, and each layer is connected by a fixed plate, and the first fin plate group 101 and the second fin plate group 205 have the same structure.

[0054] Example 2

[0055] like Fig.10 As shown, in a specific embodiment, a discharge pipe 300 is installed at the bottom of the calcining chamber 200, a control valve 301 is installed at the top of the discharge pipe 300, a collecting chamber 302 is installed at the bottom of the discharge pipe 300, and a transport mechanism is arranged inside the collecting chamber 302, the transport mechanism includes a transport belt 303, a third power device 304 is installed on the side of the transport belt 303, and the third power device 304 is installed outside the collecting chamber 302. The transport mechanism transports the calcined solid product to one end of the collecting chamber 302 through the transport belt 303. In this setting, during the calcination process, the control valve 301 is closed to prevent the material from falling, and when the calcination is completed, the control valve 301 is opened to allow the material to enter the collecting chamber 302.

[0056] like Fig.10As shown, further, ducts 305 are installed at both ends of the filtering mechanism, one end of one duct 305 is installed at the top of the collecting chamber 302, and one end of the other duct 305 is installed with a suction fan 306, which is connected to the second heat utilization channel 206. The suction force generated by the suction fan 306 causes the high-temperature gas product to enter the second heat utilization channel 206 after being filtered by the filtering mechanism.

[0057] like Figure 10-13 As shown, further, the filtering mechanism includes a plurality of separation blocks 402, a gap is maintained between two adjacent separation blocks 402, and the gap path is in a zigzag shape, and a scraper 403 is slidably installed, and the two ends of the plurality of scrapers 403 are rotatably connected with a first connecting ring 404, and a first toothed ring 405 is fixedly installed on one side of the first connecting ring 404, and the first toothed ring 405 is an inner toothed ring, and the inner and outer sides of the plurality of separation blocks 402 are respectively fixedly installed with an outer fixed ring 400 and an inner fixed ring 401, and a fixing member 411 is installed between the outer fixed ring 400 and the inner fixed ring 401, and a second connecting ring 407 is rotatably connected between the outer fixed ring 400 and the inner fixed ring 401, and the second connecting ring 407 is rotatably connected with the second connecting ring 407. A first gear 406 is rotatably mounted on one side, and the first gear 406 is meshedly connected with the first gear ring 405. A second gear ring 408 is fixedly mounted on the other side of the second connecting ring 407, and the second gear ring 408 is an outer gear ring. A fourth power device 410 is fixedly mounted on one side of the outer fixed ring 400, and second gears 409 are mounted on the output shafts at both ends of the fourth power device 410, and the second gear 409 is meshedly connected with the second gear ring 408. A closing mechanism is provided between two adjacent separation blocks 402, and the closing mechanism includes a baffle 412, which is rotatably connected to the separation block 402, and a torsion spring 413 is installed at the rotational connection between the baffle 412 and the separation block 402. In this arrangement, when the filtering mechanism is working, the fourth power device 410 drives the second gear 409 to rotate, the second gear 409 drives the second gear ring 408 to rotate through meshing, the second gear ring 408 drives the second connecting ring 407 to rotate, the second connecting ring 407 drives the first gear 406 to rotate, the first gear 406 drives the first gear ring 405 to rotate through meshing, at this time the first gear ring 405 performs eccentric motion and drives the first connecting ring 404 to perform eccentric motion, the first connecting ring 404 drives the multiple scrapers 403 connected thereto to move in the intervals between the separation blocks 402, when the gas passes through the intervals between the separation blocks 402, the solid particles are separated under the centrifugal action at the turning point, the separated solid particles are adsorbed by the separation blocks 402, and are scraped to the side under the action of the scrapers 403, when the solid particles on both sides accumulate to a certain extent, the baffle 412 cannot withstand the thrust and opens, so that the solid particles can be discharged.

[0058] Example 3

[0059] like Figure 6 , Fig. 9As shown, further, a stirring mechanism is provided inside the calcining chamber 200, and the stirring mechanism includes a rotating shaft 208, a bracket 209 is fixedly installed on the side of the rotating shaft 208, a scraper 210 is installed on the bracket 209, and the scraper 210 is in close contact with the inner wall of the calcining chamber 200, and a second power device 207 is installed at one end of the calcining chamber 200, and the output end of the second power device 207 is fixedly connected to the rotating shaft 208, and a temperature sensor 211 and a pressure sensor 212 are embedded and connected at one end of the calcining chamber 200. In this setting, the second power device 207 is started, and the second power device 207 drives the rotating shaft 208 to rotate, and the rotating shaft 208 drives the bracket 209 to rotate, so as to stir the waste salt so that it can be fully burned, and at the same time, the scraper 210 scrapes the ash on the inner wall of the calcining chamber 200 to improve the heat utilization rate, and the temperature and pressure in the calcining chamber 200 are monitored by the temperature sensor 211 and the pressure sensor 212.

[0060] like Figure 1 , Figure 2 As shown, further, a pressurizing mechanism is arranged between the second heat utilization channel 206 and the first heat utilization channel 102, and the pressurizing mechanism includes a high-pressure fan 503, a second connecting pipe 504 is installed at one end of the high-pressure fan 503, a third connecting pipe 505 is installed at one end of the second connecting pipe 504, the third connecting pipe 505 is connected to the calcining chamber 200, an outlet pipe 500 is installed at one end of the second heat utilization channel 206, one end of the outlet pipe 500 is connected to the first heat utilization channel 102, an electromagnetic valve 501 is installed on the outlet pipe 500, a first connecting pipe 502 is installed on the electromagnetic valve 501, and one end of the first connecting pipe 502 is connected to the high-pressure fan 503. In this configuration, the gas product enters the gas outlet pipe 500 after coming out of the second heat utilization channel 206. At this time, the solenoid valve 501 is opened, the high-pressure fan 503 works, and a part of the gas product is compressed into high-pressure air by the high-pressure fan 503, and is sprayed into the calcining chamber 200 through the second connecting pipe 504 and the third connecting pipe 505, thereby removing the residual ash in the calcining chamber 200 to prevent low heat utilization rate, and the remaining gas enters the first heat utilization channel 102.

[0061] like Figure 1 , Figure 2 As shown, further, a waste salt inlet 107 and a fuel inlet 108 are installed at one end of the preheating chamber 100, and an exhaust gas treatment device 109 is fixedly installed outside the first heat utilization channel 102, and the exhaust gas treatment device 109 is connected to the first heat utilization channel 102 through a pipeline. In this configuration, the exhaust gas treatment device 109 is used to treat exhaust gas to prevent air pollution.

[0062] The first power device 104 , the second power device 207 , the third power device 304 and the fourth power device 410 are all composed of a combination of a servo motor and a reducer.

[0063] Example 4

[0064] A method for using an industrial waste salt calcining furnace system with a waste heat recovery function, comprising:

[0065] S1, waste salt and combustible agent are transported through the waste salt inlet 107 and the combustible agent inlet 108, and the mixed material of waste salt and combustible agent is transported into the calcining chamber 200 through the feeding mechanism;

[0066] S2, heating the calcining chamber 200 by the heating mechanism, stirring the internal material by the stirring mechanism, so that it is fully calcined, and after the calcination is completed, the control valve 301 is opened, and the material enters the collecting chamber 302;

[0067] S3, start the suction fan 306, the suction force generated causes the gas product to enter the filtering mechanism, after the solid particles are separated by the filtering mechanism, the gas product enters the second heat utilization channel 206 for heat utilization, so that the phase change material layer 202 undergoes phase change after receiving the heat and stores the heat, and heats the atomized water channel 203, so that the atomized water forms water vapor for heat storage;

[0068] S4, the gas after passing through the second heat utilization channel 206 is blown by the high-pressure blower 503 and blown into the calcining chamber 200, thereby removing the residual ash in the calcining chamber 200;

[0069] S5 , the gas after the ash is removed passes through the filtering mechanism and then passes through the second heat utilization channel 206 again, and enters the first heat utilization channel 102 to achieve preheating of the preheating chamber 100 .

[0070] The implementation principle of an industrial waste salt calcining furnace system with waste heat recovery function of this embodiment is as follows: when in use, a large amount of waste salt and a combustion agent are added into the preheating chamber 100 through the waste salt inlet 107 and the combustion agent inlet 108, the first power device 104 is started, the first power device 104 drives the spiral blade 105 to rotate, the spiral blade 105 transports the waste salt and the combustion agent mixture stored in the preheating chamber 100 to the connecting channel 103, and enters the calcining chamber 200 under the action of gravity, the heating resistor 201 is started, the heating resistor 201 heats the calcining chamber 200 at a high temperature, so that the waste salt is calcined at a high temperature, and the second power device 207 is started at the same time, the second power device 207 drives the rotating shaft 208 to rotate, and the rotating shaft 208 drives the bracket 209 to rotate, so as to stir the waste salt so that it can be fully burned;

[0071] When the combustion is completed, the control valve 301 is opened, and the solid products after combustion fall onto the conveying belt 303 and are transported to one end of the collecting chamber 302 by the conveying belt 303;

[0072] At the same time, the suction fan 306 is started. The suction fan 306 causes the gas product to enter the filtering mechanism through the suction force generated by the conduit 305 and the filtering mechanism. After being filtered by the filtering mechanism, the particulate matter contained in the gas product is removed. At this time, the gas product enters the second heat utilization channel 206, and the high temperature contained in the gas product heats the phase change material layer 202 through the second fin plate group 205. The phase change material layer 202 is heated by the second heat utilization channel 206 and also by the heating resistor 201. At this time, atomized water is introduced into the atomized water channel 203. The atomized water channel 203 is heated by the phase change material layer 202 to convert the atomized water into water vapor, thereby realizing energy utilization;

[0073] After the gas product comes out of the second heat utilization channel 206, it enters the gas outlet pipe 500. At this time, the solenoid valve 501 is opened, and the high-pressure blower 503 works, and a part of the gas product is compressed into high-pressure air by the high-pressure blower 503, and sprayed into the calcining chamber 200 through the second connecting pipe 504 and the third connecting pipe 505, so as to remove the residual ash in the calcining chamber 200 to prevent low heat utilization rate, and the remaining gas enters the first heat utilization channel 102;

[0074] After passing through the filter mechanism, the high-pressure air enters the second heat utilization channel 206 again. At this time, the solenoid valve 501 is closed, and the high-pressure air enters the first heat utilization channel 102.

[0075] The gas entering the first heat utilization channel 102 passes through the first fin plate group 101 to preheat the preheating chamber 100, and then the gas enters the exhaust gas treatment device 109 for treatment and discharge.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An industrial waste salt calcining furnace system with waste heat recovery function, characterized in that: The invention comprises a preheating chamber (100) and a calcining chamber (200), wherein a connecting channel (103) is installed between the preheating chamber (100) and the calcining chamber (200), wherein a filtering mechanism is arranged at one end of the calcining chamber (200), wherein the filtering mechanism is used to filter the gas products of the calcining process, and wherein a heat circulation mechanism is arranged outside the preheating chamber (100) and the calcining chamber (200), wherein the heat circulation mechanism comprises a first heat utilization channel (102) and a second heat utilization channel (206), wherein the first heat utilization channel (102) is sleeved on the outside of the preheating chamber (100), and the second heat utilization channel (206) is sleeved on the outside of the calcining chamber (200), and wherein the heat circulation mechanism is used to circulate the high temperature in the gas products after calcination; A heating mechanism is arranged outside the calcining chamber (200), the heating mechanism is used to heat the calcining chamber (200), the heating mechanism comprises a heating resistor (201), the heating resistor (201) is wound around the outside of the calcining chamber (200), a heat utilization mechanism is arranged outside the heating resistor (201), the heat utilization mechanism comprises a phase change material layer (202), an atomized water channel (203) is inserted inside the phase change material layer (202), a diffusion metal plate (204) is installed on the side of the atomized water channel (203), and the diffusion metal plate (204) is inserted into the phase change material layer (202); The preheating chamber (100) and the phase change material layer (202) are both provided with a heat utilization enhancement mechanism, the heat utilization enhancement mechanism is used to enhance heat transfer, the heat utilization enhancement mechanism comprises a first fin plate group (101) and a second fin plate group (205), the first fin plate group (101) is located between the preheating chamber (100) and the first heat utilization channel (102), and the second fin plate group (205) is located between the phase change material layer (202) and the second heat utilization channel (206).

2. The industrial waste salt calcining furnace system with waste heat recovery function according to claim 1 is characterized in that: A feeding mechanism is arranged inside the preheating chamber (100), and the feeding mechanism is used to transport a fuel and industrial waste salt. The feeding mechanism comprises a spiral blade (105), and the spiral blade (105) is installed at the inner bottom of the preheating chamber (100). One end of the spiral blade (105) movably penetrates the preheating chamber (100) and extends to the outside through a transmission shaft. A weight sensor is installed at the bottom of the preheating chamber (100). A first power device (104) is installed at the outer end of the preheating chamber (100), and the output end of the first power device (104) is fixedly connected to the transmission shaft of the spiral blade (105). A partition (106) is installed at one end of the preheating chamber (100) close to the calcining chamber (200), and a groove is provided at the bottom of the partition (106), and the groove is adapted to the cross-sectional shape and size of the spiral blade (105).

3. The industrial waste salt calcining furnace system with waste heat recovery function according to claim 2 is characterized in that: A discharge pipe (300) is installed at the bottom of the calcining chamber (200), a control valve (301) is installed at the top of the discharge pipe (300), a collecting chamber (302) is installed at the bottom of the discharge pipe (300), a transport mechanism is arranged inside the collecting chamber (302), the transport mechanism comprises a transport belt (303), a third power device (304) is installed on the side of the transport belt (303), the third power device (304) is installed outside the collecting chamber (302), and the transport mechanism transports the calcined solid product to one end of the collecting chamber (302) through the transport belt (303).

4. The industrial waste salt calcining furnace system with waste heat recovery function according to claim 3 is characterized in that: Both ends of the filtering mechanism are provided with conduits (305), one end of one of the conduits (305) being provided at the top of the collecting chamber (302), and one end of the other conduit (305) being provided with a suction fan (306), the suction fan (306) being connected to the second heat utilization channel (206), and the suction force generated by the suction fan (306) causing the high-temperature gas product to enter the second heat utilization channel (206) after being filtered by the filtering mechanism.

5. The industrial waste salt calcining furnace system with waste heat recovery function according to claim 4 is characterized in that: The filtering mechanism comprises a plurality of separation blocks (402), wherein a spacing is maintained between two adjacent separation blocks (402) and scrapers (403) are slidably mounted thereon, first connection rings (404) are rotatably connected at both ends of the plurality of scrapers (403), a first toothed ring (405) is fixedly mounted on one side of the first connection ring (404), and the first toothed ring (405) is an inner toothed ring, an outer fixed ring (400) and an inner fixed ring (401) are respectively fixedly mounted on the inner and outer sides of the plurality of separation blocks (402), and a fixing member (411) is mounted between the outer fixed ring (400) and the inner fixed ring (401), a second connection ring (407) is rotatably connected between the outer fixed ring (400) and the inner fixed ring (401), a first gear (406) is rotatably mounted on one side of the second connection ring (407), and the first gear (406) is meshingly connected to the first geared ring (405).

6. The industrial waste salt calcining furnace system with waste heat recovery function according to claim 5, characterized in that: A second toothed ring (408) is fixedly mounted on the other side of the second connecting ring (407), the second toothed ring (408) being an outer toothed ring, a fourth power device (410) is fixedly mounted on one side of the outer fixed ring (400), second gears (409) are mounted on output shafts at both ends of the fourth power device (410), the second gears (409) are meshingly connected to the second toothed ring (408), a closing mechanism is arranged between two adjacent separation blocks (402), the closing mechanism comprises a baffle (412), the baffle (412) is rotationally connected to the separation block (402), and a torsion spring (413) is mounted at the rotational connection between the baffle (412) and the separation block (402).

7. The industrial waste salt calcining furnace system with waste heat recovery function according to claim 1, characterized in that: A stirring mechanism is arranged inside the calcining chamber (200), the stirring mechanism comprising a rotating shaft (208), a bracket (209) is fixedly mounted on the side of the rotating shaft (208), a scraper (210) is mounted on the bracket (209), the scraper (210) is in close contact with the inner wall of the calcining chamber (200), a second power device (207) is mounted at one end of the calcining chamber (200), an output end of the second power device (207) is fixedly connected to the rotating shaft (208), and a temperature sensor (211) and a pressure sensor (212) are embedded at one end of the calcining chamber (200).

8. The industrial waste salt calcining furnace system with waste heat recovery function according to claim 1, characterized in that: A pressurizing mechanism is provided between the second heat utilization channel (206) and the first heat utilization channel (102), the pressurizing mechanism comprising a high-pressure fan (503), a second connecting pipe (504) being installed at one end of the high-pressure fan (503), a third connecting pipe (505) being installed at one end of the second connecting pipe (504), the third connecting pipe (505) being connected to the calcining chamber (200), an air outlet pipe (500) being installed at one end of the second heat utilization channel (206), one end of the air outlet pipe (500) being connected to the first heat utilization channel (102), an electromagnetic valve (501) being installed on the air outlet pipe (500), a first connecting pipe (502) being installed on the electromagnetic valve (501), one end of the first connecting pipe (502) being connected to the high-pressure fan (503).

9. The industrial waste salt calcining furnace system with waste heat recovery function according to claim 1, characterized in that: A waste salt inlet (107) and a fuel inlet (108) are installed at one end of the preheating chamber (100), and an exhaust gas treatment device (109) is fixedly installed outside the first heat utilization channel (102), and the exhaust gas treatment device (109) is connected to the first heat utilization channel (102) through a pipeline.

10. A method for using an industrial waste salt calcining furnace system with a waste heat recovery function, which is implemented based on the industrial waste salt calcining furnace system with a waste heat recovery function according to any one of claims 1 to 9, characterized in that: The steps of using the industrial waste salt calcining furnace system with waste heat recovery function are as follows: S1, conveying waste salt and combustible agent through the waste salt inlet (107) and the combustible agent inlet (108), and conveying the mixture of waste salt and combustible agent into the calcining chamber (200) through the feeding mechanism; S2, heating the calcining chamber (200) by a heating mechanism, stirring the material inside by a stirring mechanism to fully calcine it, and after the calcination is completed, opening the control valve (301) so that the material enters the collecting chamber (302); S3, starting the suction fan (306), generating suction force to cause the gas product to enter the filtering mechanism, and after the solid particles are separated by the filtering mechanism, the gas product enters the second heat utilization channel (206) for heat utilization, causing the phase change material layer (202) to undergo phase change after receiving the heat, and store the heat, and heating the atomized water channel (203), causing the atomized water to form water vapor for heat storage; S4, the gas after passing through the second heat utilization channel (206) is blown by the high-pressure blower (503) and blown into the calcining chamber (200), thereby removing the residual ash in the calcining chamber (200); S5. The gas after the ash is removed passes through the filtering mechanism and then passes through the second heat utilization channel (206) again, and enters the first heat utilization channel (102), thereby achieving preheating of the preheating chamber (100).

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