Energy-saving and environment-friendly combustion device

Abstract

The utility model relates to the technical field of combustion devices, in particular to an energy-saving and environment-friendly combustion device which comprises a rotary kiln and a dust removal and desulfurization assembly arranged at the tail of the rotary kiln, and the dust removal and desulfurization assembly comprises an air outlet pipe, an air blower, a reaction chamber, a recovery chamber and a heat exchanger. The large end of the air outlet pipe is connected with the kiln tail of the rotary kiln, and the small end of the air outlet pipe and the air blower are connected with one outer side wall of the reaction chamber in a spaced mode. An exhaust pipe is arranged on the outer top wall of the reaction chamber, a cyclone separator is mounted on the exhaust pipe, and a heater is mounted on the inner bottom wall of the reaction chamber; the recovery chamber is connected to the other side wall of the reaction chamber, and an exhaust fan is mounted and connected outside the recovery chamber; the heat exchanger is connected with the heater and the exhaust pipe. The device can be used for dedusting and desulfurizing waste gas and recovering desulfurized solid residues, so that environment-friendly waste gas treatment is realized, the desulfurization speed is high, and the energy utilization rate is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to combustion device technical field, concretely relates to an energy -conserving and environment -friendly combustion device. BACKGROUND

[0002] Zirconium is an important industrial metal, with corrosion resistance, high melting point, good chemical stability and other characteristics, widely used in ceramics, refractory materials, alloys, optical glass, chemical industry and other fields. Zirconium ore is the main source of zirconium, mainly in the form of zircon. In the production process of zirconium ore, the combustion stage is a key link, and the main combustion equipment used is usually a rotary kiln or a calcining furnace. The combustion stage, especially the smelting and calcining stage of converting zircon into zirconium metal or other compounds (such as ZrO2), may produce various types of pollution, such as: gas pollution, using fuel (such as coal, natural gas) combustion, will produce sulfur dioxide (SO2), nitrogen oxides (NOx) and other harmful gases; Dust pollution, zirconite will decompose at high temperature, and the generated zirconium dioxide (ZrO2) may exist in gaseous form at high temperature, and condense into solid particles as the temperature decreases.

[0003] The patent with application number CN202021664526.7 discloses a rotary kiln tail dust removal and desulfurization device, which collects the settled dust through the sedimentation pipe, and sucks the solid residues generated in the dry desulfurization process into the net box for recycling through the air suction mechanism, thereby realizing environmental protection waste gas treatment, but the desulfurization efficiency of dry desulfurization is usually lower than that of wet desulfurization, and the patent only accelerates the desulfurization rate by heating the waste gas with an electric heater, which is not obvious enough, resulting in slow desulfurization rate; In addition, the treated waste gas is directly discharged into the air, and the waste gas carrying waste heat is not reused, which is not energy-saving. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide an energy-saving and environment-friendly combustion device, which can remove dust and desulfurize waste gas and recover solid residues from desulfurization, thereby realizing environmental protection waste gas treatment, and the desulfurization rate is fast and the energy utilization rate is high.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a kind of energy-saving and environment-friendly combustion device, including rotary kiln and the dust removal and desulfurization component of the kiln tail of the rotary kiln, the dust removal and desulfurization component includes gas pipe, air blower, reaction chamber, recovery chamber and heat exchanger;The gas pipe has size end and is inclined downward from big end to small end, the big end of the gas pipe is connected the kiln tail of the rotary kiln, the small end of the gas pipe and the air blower are connected the outer side wall of reaction chamber one side;Reaction chamber outer top wall is equipped with exhaust pipe, the cyclone separator is installed on the exhaust pipe, and the heater is installed on the inner bottom wall of the reaction chamber;The recovery chamber is connected in the other side wall of the reaction chamber, and the exhaust fan is connected outside the recovery chamber;The heat exchanger is connected the heater and exhaust pipe.

[0007] As optional scheme, the gas pipe is gradually smaller from big end to small end pipe diameter.

[0008] As optional scheme, the exhaust pipe is equipped with first filter screen at the connection of the reaction chamber.

[0009] As optional scheme, the exhaust fan is equipped with second filter screen at the connection of the recovery chamber.

[0010] As optional scheme, the exhaust pipe is installed with circulating pump.

[0011] As optional scheme, the reaction chamber outer top wall is equipped with feeding port on the side of the exhaust pipe.

[0012] As optional scheme, the exhaust pipe is installed with first valve above the first filter screen;The recovery chamber is installed with second valve at the connection of the reaction chamber.

[0013] Due to the adoption of the above technical scheme, the utility model will have the following beneficial effects:

[0014] The energy-saving and environment-friendly combustion device provided by the utility model, when carrying out desulfurization reaction, the speed of waste gas flowing into the reaction chamber can be accelerated by the design of the size end of the gas pipe and the inclination downward from big end to small end;Oxygen can be filled into the reaction chamber by the air blower, so as to increase the oxygen concentration in the chamber;The temperature of desulfurization reaction in the reaction chamber can be improved by the heater;The above settings can significantly accelerate the overall rate of desulfurization reaction.After the completion of desulfurization reaction, the waste gas in the exhaust pipe can be removed by the cyclone separator to obtain clean waste gas, and the solid residues of desulfurization reaction are sucked into the recovery chamber by the exhaust fan for recycling, so as to realize environmental protection waste gas treatment;The waste gas after desulfurization and dust removal can be used for waste heat utilization by the heat exchanger, so that the energy utilization rate is high.

[0015] Therefore, compared with the prior art, the utility model not only can realize environmental protection waste gas treatment, but also the rate of desulfurization reaction is faster, and it is more energy-saving. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described in the following are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 The overall structure schematic diagram of the energy-saving and environment-friendly combustion device is described in the embodiments of the present application.

[0018] Figure 2 The structure schematic diagram of the dust removal and desulfurization assembly of the energy-saving and environment-friendly combustion device is described in the embodiments of the present application. Figure 1 The structure schematic diagram of the dust removal and desulfurization assembly of the energy-saving and environment-friendly combustion device is described in the embodiments of the present application.

[0019] The drawings are as follows: 1, rotary kiln; 2, gas outlet pipe; 3, air blower; 4, reaction chamber; 41, heater; 42, feeding port; 5, recovery chamber; 51, air extractor; 6, heat exchanger; 7, exhaust pipe; 71, cyclone separator; 72, circulating pump; 81, first filter screen; 82, second filter screen; 91, first valve; 92, second valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0021] In the description of the present application, it should be noted that the orientations or position relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "connection", "connection" should be broad sense understanding, for example, can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through the intermediate medium, can be the communication inside two elements.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0023] Please refer to Figure 1 And Figure 2 In an embodiment of the energy-saving and environment-friendly combustion device, the energy-saving and environment-friendly combustion device comprises a rotary kiln 1 and a dust removal and desulfurization assembly arranged at the kiln tail of the rotary kiln 1, zirconite is calcined in the rotary kiln 1, the generated waste gas carries dust into the dust removal and desulfurization assembly, and is discharged after dust removal and desulfurization. Specifically, the dust removal and desulfurization assembly comprises a gas outlet pipe 2, a blower 3, a reaction chamber 4, a recovery chamber 5 and a heat exchanger 6.

[0024] Among them, the gas outlet pipe 2 has a large end and a small end, preferably the pipe diameter gradually decreases from the large end to the small end, and the gas outlet pipe 2 is inclined downward from the large end to the small end;The large end of the gas outlet pipe 2 is connected to the kiln tail of the rotary kiln 1, and the small end of the gas outlet pipe 2 is connected to the outer side wall of the reaction chamber 4. According to Bernoulli's principle, the reduction of cross-sectional area will lead to an increase in speed, and the design of the large and small ends of the gas outlet pipe 2 can reduce the cross-sectional area of the channel through which the waste gas enters the reaction chamber 4, thereby increasing the speed of the waste gas flowing into the reaction chamber 4;The gas outlet pipe 2 is inclined downward from the large end to the small end, which can accelerate the airflow by gravity. Since increasing the flow rate of waste gas can increase the mass transfer rate, i.e. the rate at which sulfides are transferred from the gas phase to the solid phase (desulfurizer), the overall rate of the desulfurization reaction can be significantly accelerated. Oxygen can be filled into the reaction chamber 4 by the blower 3 to increase the oxygen concentration in the chamber, thereby further accelerating the desulfurization reaction rate.

[0025] Among them, the outer top wall of the reaction chamber 4 is provided with an exhaust pipe 7, and a cyclone separator 71 is installed on the exhaust pipe 7, which can remove dust from the waste gas, and a heater 41 is installed on the inner bottom wall of the reaction chamber 4, which can adopt a plate-type electric heater 41, which can increase the temperature of the desulfurization reaction in the reaction chamber 4, thereby accelerating the rate of the desulfurization reaction. The recovery chamber 5 is connected to the other side wall of the reaction chamber 4, and an exhaust fan 51 is connected outside the recovery chamber 5, which can suck the solid residues of the desulfurization reaction into the recovery chamber 5 for recovery.

[0026] The heat exchanger 6 is connected with the heater 41 and the exhaust pipe 7, and the heat exchanger 6 can be an energy storage type heat exchanger 6, which is a device for storing and releasing heat energy by using energy storage materials.

[0027] Specifically, the first filter screen 81 is arranged at the position where the exhaust pipe 7 is connected with the reaction chamber 4, and the periphery of the first filter screen 81 is fixedly connected with the inner side wall of the exhaust pipe 7; when the desulfurization reaction is completed, the first filter screen 81 can filter the residual desulfurization reactants and impurities in the exhaust gas.

[0028] Specifically, the second filter screen 82 is arranged at the position where the exhaust pipe 7 is connected with the recovery chamber 5, and the periphery of the second filter screen 82 is fixedly connected with the inner side wall of the pipeline through which the exhaust fan 51 is connected with the recovery chamber 5; when the exhaust fan 51 sucks the solid residues of the desulfurization reaction into the recovery chamber 5, the first filter screen 81 can prevent the solid residues from separating from the recovery chamber 5.

[0029] Specifically, the circulating pump 72 is arranged on the exhaust pipe 7, and the circulating pump 72 is a device for circulating or conveying fluid in a fluid system; the circulating pump 72 is arranged between the cyclone separator 71 and the heat exchanger 6, so that the exhaust gas can be continuously discharged from the reaction chamber 4 through the exhaust pipe 7.

[0030] Specifically, the reaction chamber 4 is provided with the feeding opening 42 on the outer top wall and located at one side of the exhaust pipe 7; the dry desulfurization reactants can be fed into the reaction chamber 4 through the feeding opening 42, so that the dry desulfurization reactants can react with the exhaust gas; the feeding opening 42 is provided with the cover plate which can be turned to open the feeding opening 42; when the desulfurization reaction is performed, the cover plate can be covered, so that the exhaust gas can fully react with the dry desulfurization reactants.

[0031] Specifically, the first valve 91 is arranged above the first filter screen 81 on the exhaust pipe 7; the second valve 92 is arranged at the position where the recovery chamber 5 is connected with the reaction chamber 4; when the desulfurization reaction is performed, the first valve 91 and the second valve 92 can be closed, so that the exhaust gas can fully react with the dry desulfurization reactants.

[0032] The use method or working principle of the utility model is as follows:

[0033] The zircon ore is calcined in the rotary kiln 1, the generated waste gas carrying dust enters into the dust removal and desulfurization assembly from the rotary kiln 1 tail, then the waste gas enters into the reaction chamber 4 from the outlet pipe 2, and the desulfurization reaction with the dry desulfurization reactant in the reaction chamber 4, due to the design of the outlet pipe 2 size end and inclination, the oxygen input by the air blower 3 and the heat provided by the heater 41, thus the overall rate of the desulfurization reaction can be significantly accelerated; after the desulfurization reaction is completed, the first valve 91 is opened to make the desulfurized waste gas enter into the exhaust pipe 7, the waste gas in the exhaust pipe 7 is removed of dust after passing through the cyclone separator 71, then enters into the heat exchanger 6, the residual heat carried is transferred to the energy storage material of the heat exchanger 6 to store energy, thus the next time the desulfurization reaction is carried out, the energy storage material can release energy to transfer heat to the heater 41, the energy utilization rate is improved; after the waste gas after the desulfurization, dust removal and waste heat utilization is discharged from the heat exchanger 6, the second valve 92 and the air extractor 51 are opened, the solid residues of the desulfurization reaction are sucked into the recovery chamber 5 by the air extractor 51 to be recovered.

[0034] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent application scope. It should be pointed out that, for the ordinary skilled in the art, without departing from the present application concept, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. An energy-saving and environment-friendly combustion device, comprising a rotary kiln (1) and a dust removal and desulfurization assembly arranged at a kiln tail of the rotary kiln (1), characterized in that, The dust removal and desulfurization assembly comprises an air outlet pipe (2), a blower (3), a reaction chamber (4), a recovery chamber (5) and a heat exchanger (6); the air outlet pipe (2) has a large end and a small end and is inclined downward from the large end to the small end, the large end of the air outlet pipe (2) is connected to the kiln tail of the rotary kiln (1), and the small end of the air outlet pipe (2) is connected to an outer sidewall of the reaction chamber (4) through the blower (3); an exhaust pipe (7) is arranged on the outer top wall of the reaction chamber (4), a cyclone separator (71) is arranged on the exhaust pipe (7), and a heater (41) is arranged on the inner bottom wall of the reaction chamber (4); the recovery chamber (5) is connected to the other sidewall of the reaction chamber (4), and an air extractor (51) is arranged outside the recovery chamber (5); the heat exchanger (6) is connected to the heater (41) and the exhaust pipe (7).

2. The energy saving and environment friendly combustion apparatus as claimed in claim 1, wherein The air outlet pipe (2) is gradually reduced in diameter from the large end to the small end.

3. The energy saving and environment friendly combustion apparatus as claimed in claim 1, wherein The exhaust pipe (7) is connected to the reaction chamber (4) and is provided with a first filter screen (81).

4. The energy saving and environment friendly combustion apparatus as claimed in claim 1, wherein The air extractor (51) is connected to the recovery chamber (5) and is provided with a second filter screen (82).

5. The energy saving and environment friendly combustion apparatus as claimed in claim 1, wherein A circulating pump (72) is arranged on the exhaust pipe (7).

6. The energy saving and environment friendly combustion apparatus as claimed in claim 1, wherein The outer top wall of the reaction chamber (4) is provided with a feeding port (42) on one side of the exhaust pipe (7).

7. The energy-saving and environment-friendly combustion device according to claim 3, characterized in that, A first valve (91) is arranged above the first filter screen (81) on the exhaust pipe (7); and a second valve (92) is arranged on the recovery chamber (5) and connected to the reaction chamber (4).

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