Industrial furnace with drying and sintering co-processing hazardous waste

Abstract

The utility model discloses an industrial furnace with drying and sintering co-processing hazardous waste, which comprises a sintering and drying mechanism, a cooling kiln is arranged at the head end of the sintering and drying mechanism, and the sintering and drying mechanism is communicated with a flue gas processing mechanism through a flue gas conveying pipe. According to the industrial furnace with the drying and sintering co-processing function for hazardous waste, through cooperative work of the sintering and drying mechanism and the flue gas processing mechanism, hot flue gas exhausted from the sintering furnace does not make contact with materials, and wet materials are indirectly dried through heat radiation generated by the exhausted high-temperature flue gas, so that the flue gas does not generate dioxin components, and therefore the drying and sintering co-processing function is achieved. Meanwhile, the flue gas can be subjected to dust removal, denitration, desulfurization and white elimination treatment, damp and hot gas exhausted from the drying kiln is led out from the kiln tail of the drying kiln through the first induced draft fan and then enters the sintering kiln to be subjected to secondary combustion treatment, the waste flue gas does not contain dioxin, and harmless production is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cement kiln collaborative disposal technical field, concretely is an industrial furnace with drying and sintering collaborative disposal dangerous waste. BACKGROUND

[0002] With the increasing production of all kinds of waste, the drawbacks of traditional landfill disposal method have appeared, and it is gradually replaced by waste incineration power generation method, and in view of the advantages of high-temperature calcination of cement kiln, using the cement kiln to dispose all kinds of waste gradually becomes another new waste incineration method, in recent years, cement kiln collaborative disposal of waste is favored, and in the treatment of municipal solid waste and dangerous waste, it occupies a place.

[0003] Cement kiln collaborative disposal is a new waste disposal method proposed by cement industry, which means that solid waste meeting or after pretreatment meeting the requirements of entering the kiln is put into the cement kiln to realize the harmless disposal of solid waste while producing cement clinker.

[0004] The original process of dangerous waste collaborative cement kiln technology is that the material enters the kiln from the tail of the drying kiln, and the hot flue gas from the sintering kiln is directly used to dry the material, and then the material enters the sintering kiln for high-temperature sintering, so that the dioxin component is generated in the process of drying the wet material with hot flue gas, the subsequent treatment cost of dioxin component is high, it is not complete, and the problem of dioxin emission exceeding the standard cannot be completely solved. UTILITY MODEL CONTENT

[0005] The utility model aims at providing an industrial furnace with drying and sintering collaborative disposal of dangerous waste to solve the problem of dioxin emission exceeding the standard caused by the traditional drying kiln and sintering kiln insertion technology.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: an industrial furnace with drying and sintering collaborative disposal of dangerous waste, which comprises a sintering and drying mechanism, a cooling kiln, a flue gas conveying pipe and a flue gas treatment mechanism, the cooling kiln is arranged at the head end of the sintering and drying mechanism, and the sintering and drying mechanism is connected with the flue gas treatment mechanism through the flue gas conveying pipe.

[0007] The sintering and drying mechanism comprises a sintering kiln, a fuel inlet is formed at the kiln head of the sintering kiln, a flue gas duct is arranged at the kiln tail of the sintering kiln, the head end of the flue gas duct is communicated with the tail end of the sintering kiln, a plurality of ash hoppers are arranged at the bottom end of the flue gas duct, a drying kiln is further arranged at the kiln tail of the sintering kiln, the kiln chamber of the drying kiln is communicated with the flue gas duct, an inlet kiln auger is arranged at the kiln tail of the drying kiln, a discharge port is formed at the kiln head of the drying kiln, the head end of the discharge port is communicated with the tail end of the sintering kiln, and the bottom end of the kiln head of the sintering kiln is communicated with the kiln tail of the cooling kiln.

[0008] Preferably, the drying kiln has a double-layer structure, that is, the kiln chamber is not communicated with the kiln chamber, the flue gas duct is communicated with the kiln chamber of the drying kiln, and the inlet kiln auger is inserted into the kiln chamber of the drying kiln.

[0009] Preferably, the top of the kiln tail of the drying kiln and the middle segment top of the discharge port are both formed with a wet waste gas outlet, the wet waste gas outlet is communicated with the fuel inlet at the head end of the sintering kiln through a waste gas conveying pipe, an induced draft fan I is arranged in the pipeline of the waste gas conveying pipe, the wet waste gas in the drying kiln is led out through the waste gas conveying pipe and the induced draft fan I, and then is introduced into the sintering kiln for secondary combustion treatment.

[0010] Preferably, the tail top end of the inlet kiln auger is formed with a wet material inlet.

[0011] Preferably, the flue gas treatment mechanism comprises a bag-type dust collector, a denitration device and a desulfurization tower, the bag-type dust collector, the denitration device and the desulfurization tower are all communicated through connecting pipes, an induced draft fan II is arranged in the pipeline connected between the denitration device and the desulfurization tower, the flue gas inlet of the bag-type dust collector is communicated with a flue gas conveying pipe, a spraying pipe is arranged at the top end of the desulfurization tower, a drain pipe is arranged at the bottom end of the desulfurization tower, the bottom end of the spraying pipe is communicated with a water tank through a water pump, the other end of the drain pipe is also communicated with the water tank, and a flue gas white smoke elimination device is arranged at the flue gas outlet at the top of the desulfurization tower.

[0012] Preferably, the spraying pipe is coiled at the inner top end of the desulfurization tower, and spraying holes are formed in the outer wall of the spraying pipe in the desulfurization tower.

[0013] Preferably, the bottom end of the desulfurization tower is formed with a drain port, and the drain port is communicated with the drain pipe through a flange plate.

[0014] Compared with the prior art, the industrial furnace for drying and sintering and cooperatively disposing dangerous waste has the advantages that: the hot flue gas discharged from the sintering kiln does not contact with the materials, i.e. the materials are placed in the kiln of the drying kiln, and the smoke flue is connected with the kiln of the drying kiln, so that the hot radiation generated by the discharged high-temperature flue gas is used to indirectly dry the wet materials, so that the flue gas does not generate dioxin components, and meanwhile, the flue gas can be subjected to dust removal, denitration, desulfurization and white smoke elimination treatment, and the wet hot gas discharged from the drying kiln is introduced from the drying kiln tail through the induced draft fan I and then introduced into the sintering kiln for secondary combustion treatment, so that the waste flue gas does not contain dioxin components, and harmless production is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a connection structure diagram of the utility model.

[0016] In the figure: 1, sintering and drying mechanism, 101, sintering kiln, 102, fuel inlet, 103, smoke flue, 104, ash bucket, 105, drying kiln, 106, kiln entry auger, 107, discharge port, 108, waste gas conveying pipe, 109, induced draft fan I; 2, cooling kiln, 3, flue gas conveying pipe, 4, flue gas treatment mechanism, 401, bag-type dust collector, 402, denitration equipment, 403, induced draft fan II, 404, desulfurization tower, 405, spray pipe, 406, drain pipe, 407, water pump, 408, water tank, 409, flue gas white smoke elimination equipment. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] Please refer to Figure 1The utility model provides a technical scheme: an industrial furnace with drying and sintering synergic disposal dangerous waste, including sintering and drying mechanism 1, cooling kiln 2, flue gas delivery pipe 3 and flue gas treatment mechanism 4, the first end of sintering and drying mechanism 1 is provided with cooling kiln 2, and cooling kiln 2 is used to cool the finished product particle after sintering, and sintering and drying mechanism 1 is connected with flue gas treatment mechanism 4 through flue gas delivery pipe 3, and flue gas treatment mechanism 4 is used to handle the flue gas generated during incineration, so that it reaches the discharge standard, and sintering and drying mechanism 1 is used to dry and sinter the dangerous waste mixture, and flue gas delivery pipe 3 is used to transport the flue gas generated during sintering waste mixture, and sintering and drying mechanism 1 and flue gas treatment mechanism 4 are connected together,

[0019] The sintering and drying mechanism 1 comprises a sintering kiln 101, a fuel inlet 102 is arranged at the kiln head of the sintering kiln 101, the fuel inlet 102 is used for supplementing fuel to the burner inside the sintering kiln 101, a flue gas duct 103 is arranged at the kiln tail of the sintering kiln 101, and the head end of the flue gas duct 103 is communicated with the tail end of the sintering kiln 101, the flue gas duct 103 is used for conveying the flue gas generated when the sintering kiln 101 burns the material, a plurality of ash hoppers 104 are arranged at the bottom end of the flue gas duct 103, the ash hoppers 104 are used for storing the dust filtered out from the flue gas, a drying kiln 105 is further arranged at the kiln tail of the sintering kiln 101, the drying kiln 105 is used for drying the wet material, and the kiln chamber of the drying kiln 105 is communicated with the flue gas duct 103, so that the high-temperature flue gas generated by the sintering kiln 101 can enter the kiln chamber of the drying kiln 105, and the wet material in the drying kiln 105 can be simply dried by using the heat radiation of the high-temperature flue gas, an inlet screw 106 is arranged at the kiln tail of the drying kiln 105, the inlet screw 106 is used for conveying the wet material into the drying kiln 105, a discharge port 107 is arranged at the kiln head of the drying kiln 105, and the head end of the discharge port 107 is communicated with the tail end of the sintering kiln 101, the discharge port 107 is used for discharging the dried material to the inside of the sintering kiln 101, the kiln head of the sintering kiln 101 is communicated with the kiln tail of the cooling kiln 2, the sintering kiln 101 is used for sintering the material, the drying kiln 105 has a double-layer structure, that is, the kiln chamber is not communicated with the kiln chamber, the flue gas duct 103 is communicated with the kiln chamber of the drying kiln 105, and the inlet screw 106 is inserted into the kiln chamber of the drying kiln 105, wet waste gas outlets are arranged at the top of the kiln tail of the drying kiln 105 and the middle top of the discharge port 107, which are used for discharging the wet hot waste gas generated in the drying process, and are communicated with the fuel inlet 102 at the head end of the sintering kiln 101 through a waste gas conveying pipe 108, an induced draft fan 109 is arranged in the pipeline of the waste gas conveying pipe, the induced draft fan 109 is used for conveying the wet hot waste gas generated in the drying kiln 105 to the inside of the sintering kiln 101, the wet waste gas in the drying kiln 105 is led out through the wet waste gas outlet, the waste gas conveying pipe 108 and the induced draft fan 109, and then enters the sintering kiln 101 for secondary combustion treatment, and a wet material inlet is arranged at the top end of the tail of the inlet screw 106.

[0020] By arranging the sintering and drying mechanism 1, the high-temperature flue gas generated by the sintering kiln 101 is communicated with the kiln chamber of the drying kiln 105 through the flue gas duct 103, so that the high-temperature flue gas is not directly contacted with the wet material, the problem that the dioxin component is generated when the high-temperature flue gas directly dries the wet material is avoided, the dioxin component in the flue gas is reduced, and harmless production is realized.

[0021] The flue gas treatment mechanism 4 comprises a bag-type dust collector 401, a denitration device 402 and a desulfurization tower 404, the bag-type dust collector 401, the denitration device 402 and the desulfurization tower 404 are connected in communication through connecting pipes, the bag-type dust collector 401 is used for filtering large-particle dust contained in high-temperature flue gas, the denitration device 402 is used for denitration treatment of the flue gas, and an induced draft fan two 403 is arranged at a pipeline connected between the denitration device 402 and the desulfurization tower 404, the induced draft fan two 403 is used for guiding the flue gas and conveying the flue gas subjected to dust removal and denitration treatment to the desulfurization tower 404, a flue gas inlet of the bag-type dust collector 401 is connected in communication with the flue gas conveying pipe 3, the desulfurization tower 404 is used for desulfurization treatment of the flue gas, a spraying pipe 405 is arranged at a top end of the desulfurization tower 404, the spraying pipe 405 is used for spraying water into the desulfurization tower 404, so as to reduce the temperature inside the spraying tower, a drain pipe 406 is arranged at a bottom end of the desulfurization tower 404, the drain pipe 406 is used for collecting the spraying water and conveying the spraying water to the inside of a water tank 408 again, a bottom end of the spraying pipe 405 is connected in communication with the water tank 408 through a water pump 407, and the other end of the drain pipe 406 is also connected in communication with the water tank 408, the water pump 407 is used for conveying cooling water in the water tank 408 to the spraying pipe 405, a flue gas outlet at a top of the desulfurization tower 404 is provided with a flue gas white smoke elimination device 409, the flue gas white smoke elimination device 409 is used for white smoke elimination treatment of the flue gas, the spraying pipe 405 is coiled and arranged at the inside top end of the desulfurization tower 404, and a plurality of spraying holes are arranged on an outer wall of the spraying pipe 405 inside the desulfurization tower 404, a drain port is arranged at the bottom end of the desulfurization tower 404, the drain port is connected in communication with the drain pipe 406 through a flange, and the drain pipe 406 is used for discharging the cooling water inside the spraying tower.

[0022] By arranging the flue gas treatment mechanism 4, the flue gas generated after the sintering waste mixture of the sintering kiln 101 is treated to reach the emission standard, so that pollution to the external environment caused by direct emission of the flue gas is avoided.

[0023] The detailed connection means is a known technology in the art, and the working principle and process are mainly introduced below.

[0024] When the sintering and drying mechanism 1 starts to work, the waste mixture to be sintered is transported into the kiln of the drying kiln 105 through the kiln feeder 106, at the same time, the sintering kiln 101 also starts to work to burn the dry materials, the high-temperature flue gas generated by the sintering kiln 101 when burning the dry materials will be discharged through the smoke flue 103 at the tail of the sintering kiln 101, since the smoke flue 103 is connected with the kiln room of the drying kiln 105, therefore, the discharged high-temperature flue gas will also enter the kiln room of the drying kiln 105, since the wet materials are located in the kiln of the drying kiln 105, therefore, the high-temperature flue gas will not directly contact with the wet materials, but the heat radiation generated by the high-temperature flue gas will indirectly dry the wet materials in the kiln of the drying kiln 105, in this way, the flue gas will not produce dioxin components, and the wet and hot gas in the kiln of the drying kiln 105 will be discharged through the wet waste gas outlet arranged on the drying kiln 105, and through the cooperation of the induced draft fan 109 and the waste gas conveying pipe, the wet and hot waste gas will be introduced into the sintering kiln 101 for secondary combustion treatment; at the same time, the high-temperature flue gas generated by the sintering kiln 101 when burning will not be directly discharged, but will be transported to the flue gas treatment mechanism 4 through the flue gas conveying pipe 3, through the cooperation of the bag-type dust collector 401, the denitration equipment 402, the desulfurization tower 404 and the smoke gas white elimination equipment 409, a series of dust removal, desulfurization, denitration and smoke gas white elimination treatment can be performed on the discharged high-temperature flue gas, so that the flue gas meets the emission standard, avoids the pollution of the discharged flue gas to the environment, and realizes harmless production.

[0025] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An industrial furnace for the co-processing of hazardous waste through drying and sintering, characterized in that, It includes a sintering and drying mechanism, a cooling kiln, a flue gas conveying pipe, and a flue gas treatment mechanism. The sintering and drying mechanism is equipped with a cooling kiln at its first end, and the sintering and drying mechanism is connected to the flue gas treatment mechanism through the flue gas conveying pipe. The sintering and drying mechanism includes a sintering kiln, a fuel inlet at the kiln head, a flue gas duct at the kiln tail, the first end of the flue gas duct being connected to the last end of the sintering kiln, multiple ash hoppers at the bottom of the flue gas duct, a drying kiln at the kiln tail, the kiln chamber of the drying kiln being connected to the flue gas duct, an inlet screw conveyor at the kiln tail of the drying kiln, a discharge port at the kiln head, the first end of the discharge port being connected to the last end of the sintering kiln, and the bottom end of the kiln head of the sintering kiln being connected to the kiln tail of the cooling kiln.

2. An industrial furnace for the co-processing of hazardous waste through drying and sintering as described in claim 1, characterized in that, The drying kiln has a double-layer structure, that is, the inside of the kiln and the kiln between the kilns are not connected, the flue gas duct is connected to the kiln between the kilns, and the auger for entering the kiln is inserted inside the drying kiln.

3. An industrial furnace for the co-processing of hazardous waste through drying and sintering as described in claim 1, characterized in that, The drying kiln has wet exhaust gas outlets at the top of the kiln tail and the top of the middle section of the feed inlet. These outlets are connected to the fuel inlet at the head of the sintering kiln via exhaust gas conveying pipes. An induced draft fan is installed in the exhaust gas conveying pipe. The wet exhaust gas in the drying kiln is drawn out from the wet exhaust gas outlets through the exhaust gas conveying pipe and the induced draft fan, and then enters the sintering kiln for secondary combustion treatment.

4. An industrial furnace for the co-processing of hazardous waste through drying and sintering, as described in claim 1, is characterized in that... The tail end of the auger for entering the kiln has a wet material inlet.

5. An industrial furnace for the co-processing of hazardous waste through drying and sintering as described in claim 1, characterized in that, The flue gas treatment system includes a bag filter, a denitrification device, and a desulfurization tower. The bag filter, denitrification device, and desulfurization tower are all connected by connecting pipes. An induced draft fan is installed at the pipe connecting the denitrification device and the desulfurization tower. The flue gas inlet of the bag filter is connected to the flue gas conveying pipe. A spray pipe is installed at the top of the desulfurization tower, and a drain pipe is installed at the bottom of the desulfurization tower. The bottom end of the spray pipe is connected to a water tank via a water pump, and the other end of the drain pipe is also connected to the water tank. A flue gas whitening device is installed at the flue gas outlet at the top of the desulfurization tower.

6. An industrial furnace for the co-processing of hazardous waste through drying and sintering, as described in claim 5, is characterized in that... The spray pipe is coiled at the top of the inside of the desulfurization tower, and spray holes are opened on the outer wall of the spray pipe inside the desulfurization tower.

7. An industrial furnace for the co-processing of hazardous waste through drying and sintering, as described in claim 5, is characterized in that... The desulfurization tower has a drain outlet at the bottom, which is connected to a drain pipe via a flange.

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