Device for producing antimony white by using waste heat of waste gas and reducing energy consumption

Abstract

The utility model provides a device for producing antimony white and reducing energy consumption by using waste heat of waste gas, which comprises an air blower, the air blower is connected with an antimony white oxidation pot through a pipeline, and the antimony white oxidation pot is connected with an antimony white collector through a pipeline. Pressure transmitters are arranged on a pipeline between the air blower and the antimony white oxidation pot and a pipeline between the antimony white oxidation pot and the antimony white collector, the pressure transmitters are connected with a PLC automatic control system, the antimony white collector is connected with an exhaust fan, the exhaust fan is connected with the air blower through a waste heat conveying pipeline, and the waste heat conveying pipeline is connected with the air blower. An electric valve is arranged on the waste heat conveying pipeline and connected with the PLC automatic control system. The waste heat conveying pipeline is additionally arranged between the exhaust fan and the air blower, and the opening degree of the electric valve is controlled through the pressure transmitter, so that recycling of high-temperature waste gas is achieved, gas energy consumption is reduced, pressure balance of the whole pipeline is guaranteed, safe operation is achieved, and the safety coefficient is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, and specifically relates to a device for producing antimony white by utilizing waste heat of waste gas to reduce energy consumption. Background Technique

[0002] In the chemical industry, antimony white, as an excellent white pigment and flame retardant, is widely used in many fields such as paints, plastics, rubber, glass, ceramics, textiles, etc. It can not only provide good flame retardant performance but also increase the heat resistance of materials. In addition, antimony white is used in the enamel industry to increase the opacity and surface gloss of enamel, and is used as a decolorizing agent in the glass industry. Generally speaking, due to its diverse uses and good performance, antimony white plays an important role in many industrial fields. At present, the production of antimony white in China still mainly uses the pyrometallurgical method. The pyrometallurgical production mainly has the advantage of large production capacity. The output of antimony white produced by the pyrometallurgical process accounts for more than 95% of the total output of antimony white. Its main production process is to obtain antimony white from high-grade metallic antimony raw materials through steps such as high-temperature melting, oxidation and volatilization, and cooling and sublimation. This is the most widely used method in the pyrometallurgical process. The main equipment for antimony white oxidation and volatilization is the antimony white oxidation pot. At present, the production of antimony white uses natural gas combustion to provide temperature support for the volatilization of antimony white. Air is blown into the oxidation pot by a blower and reacts with antimony in a high-temperature molten state to produce antimony white. The volatilized antimony white is collected by a bag collector, and the excess waste gas is discharged after reaching the standard through treatment. The main problem is that the temperature of the air blown in by the blower is low, which will cause the temperature to drop after being blown into the oxidation pot, and it is necessary to increase the combustion of natural gas to heat up the oxidation pot to ensure the normal production of antimony white, resulting in an increase in the energy consumption of antimony white.

[0003] The invention patent with the patent publication number of "CN104495923A, named as a long-life and durable lead-antimony alloy high-grade antimony white volatilization furnace" specifically discloses a long-life and durable lead-antimony alloy high-grade antimony white volatilization furnace, including a furnace body, which is a hemispherical pot body established by a furnace body wall and a furnace bottom base. A spout facing the bottom of the furnace body and a feed port communicating with the inner cavity of the furnace body are arranged on the furnace body wall; a high-temperature refractory material layer with strong slag erosion resistance is inlaid near the slag line in the inner cavity of the furnace body; a gas collection hood is covered on the top of the furnace body. The gas collection hood has a conical structure. A plurality of primary air inlet nozzles inclined to the liquid level in the furnace body are arranged on the gas collection hood, and a central slag skimming port that can be opened and closed is arranged in the middle of the gas collection hood; a secondary air inlet and an air outlet with a valve are arranged on the central slag skimming port. The long-life and durable lead-antimony alloy high-grade antimony white volatilization furnace mentioned in this invention patent does not provide a solution for the reuse of the high-temperature waste gas after antimony white collection, and does not reuse the waste heat.

[0004] The utility model patent with the publication number of "CN214990314U, named an antimony white oxidation energy-saving combustion system" specifically discloses an antimony white oxidation energy-saving combustion system, including a combustion furnace. An oxidation pot is arranged at the top of the inner wall of the combustion furnace, and an electric heating coil is arranged below the oxidation pot. Both sides of the bottom of the inner wall of the combustion furnace are fixedly connected with vertical plates. A chute is opened on each side of the two vertical plates facing each other. A regulating plate is slidably connected to the inner walls of the two chutes. A fixing rod is fixedly connected to the top of the regulating plate, and a buckle for fixing the electric heating coil is fixedly connected to the top of the fixing rod. A first air cylinder for driving the regulating plate to move up and down is arranged at the bottom of the regulating plate. The fixed end of the first air cylinder is fixedly connected to the bottom of the inner wall of the combustion furnace, and the working end of the first air cylinder is fixedly connected to the regulating plate through a connecting plate. A detachable shell is arranged at the top of the combustion furnace. In this utility model, by arranging a shell at the top of the combustion furnace, during the heating process of the oxidation pot, the excess heat generated by the oxidation pot can preheat the raw materials stored in the shell, improving the oxidation efficiency. By arranging a circulating water pipe at the bottom of the inner wall of the combustion furnace, the heat dissipated at the bottom of the heat insulation plate can be reused, avoiding heat waste. Although the waste heat is utilized, it is mainly used for heating water and not for the production of antimony white. At the same time, the heat in the finally discharged tail gas is still not utilized.

[0005] The invention patent with the publication number of "CN1045380A, named a process for producing ultrafine antimony white in an antimony white furnace" specifically discloses a process for producing ultrafine antimony white in an antimony white furnace, including a Roots blower, an antimony white furnace, a cyclone dust collector, an induced draft fan, a cloth dust collector, an induced draft fan, a reverberatory furnace, and a surface cooler. It is characterized in that a centrifugal blower, a bag dust collector, an air classification system, and a moisture absorber are added. The antimony white generator is composed of a nozzle, an inclined flue, a tee, a stone insulation layer, and a crucible. The centrifugal blower provides the third air that makes the antimony white generator generate negative pressure through the nozzle, and is turbulently and evenly mixed with the antimony white vapor, so that the Sb2O3 vapor contained is rapidly cooled from above 900 °C to <150 °C within 0.1 second. The Roots blower provides the second air blown above the antimony surface through a steel pipe, so that the Sb and SbO in the vapor state are oxidized into Sb2O3, and are output along the tee and the inclined flue at an angle of 45° to the horizontal plane, and are turbulently and evenly mixed with the third air and rapidly cooled. The Roots blower provides the first air blown into the antimony liquid through a corundum pipe, so that the antimony liquid becomes antimony vapor, Sb2O2 vapor, and SbO vapor and rises along the crucible. This invention patent adopts the method of furnace lining heat preservation to avoid heat loss, but there is still no effective reuse of the generated high-temperature waste gas. Utility Model Content

[0006] The present utility model provides a device for producing antimony white by utilizing waste gas waste heat to reduce energy consumption in order to solve the above problems.

[0007] The technical solution of the present utility model is realized as follows: A device for producing antimony white by utilizing waste heat of waste gas to reduce energy consumption, including a blower, the blower is connected to an antimony white oxidation pot through a pipeline, the antimony white oxidation pot is connected to an antimony white collector through a pipeline, pressure transmitters are provided on the pipelines between the blower and the antimony white oxidation pot, and between the antimony white oxidation pot and the antimony white collector, the pressure transmitters are connected to a PLC automatic control system, the antimony white collector is connected to an exhaust fan, the exhaust fan is connected to the blower through a waste heat transmission pipeline, an electric valve is provided on the waste heat transmission pipeline, and the electric valve is connected to the PLC automatic control system;

[0008] Preferably, an air purifier is provided inside the blower;

[0009] Preferably, the waste heat transmission pipeline is made of stainless steel;

[0010] Preferably, the air volume of the blower is higher than that of the exhaust fan.

[0011] The beneficial effects of the present utility model are as follows: The present utility model adds a waste heat transmission pipeline between the exhaust fan and the blower, and controls the opening degree of the electric valve through a pressure transmitter to realize the reuse of high-temperature waste gas. On the one hand, the high-temperature waste gas is used instead of air for antimony white production, reducing gas energy consumption; on the other hand, by setting a pressure transmitter to control the opening degree of the electric valve, the pressure balance of the whole pipeline is ensured, realizing safe operation. The present utility model has a high safety factor and has a relatively remarkable effect in reducing the processing cost of products. Description of the Drawings

[0012] Figure 1 is a structural schematic diagram of the present utility model;

[0013] Figure 2 is a control circuit diagram of the pressure transmitter of the present utility model.

[0014] Part description: 1. Blower, 2. Pressure transmitter, 3. Antimony white oxidation pot, 4. Antimony white collector, 5. Exhaust fan, 6. Electric valve, 7. Waste heat transmission pipeline, 8. PLC automatic control system. Detailed Embodiment

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0016] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0017] Referring to the attached Figure 1-2 , a device for producing antimony white by utilizing waste heat of waste gas to reduce energy consumption, which includes a blower 1. An air purifier is provided inside the blower. The blower 1 is connected to an antimony white oxidation pot 3 through a pipeline, and the purified air is transported through the pipeline to participate in the oxidation reaction of antimony white inside the antimony white oxidation pot. The antimony white oxidation pot 3 is connected to an antimony white collector 4 through a pipeline to transport the qualified produced antimony white to the antimony white collector. Pressure transmitters 2 are provided on the pipelines between the blower 1 and the antimony white oxidation pot 3, and between the antimony white oxidation pot 3 and the antimony white collector 4. The pressure transmitter 2 is connected to a PLC automatic control system 8. The function of the pressure transmitter 2 is to monitor the pipeline pressures between the blower and the antimony white oxidation pot, and between the antimony white oxidation pot and the antimony white collector. The antimony white collector 4 is connected to an exhaust fan 5, and the filtered high-temperature waste gas enters the exhaust fan; the exhaust fan 5 is connected to the blower 1 through a waste heat transmission pipeline 7. The exhaust fan 5 sends the filtered high-temperature waste gas to the inlet of the blower 1 to realize the reuse of the waste heat of the high-temperature waste gas. The waste heat transmission pipeline is made of stainless steel to avoid the problem that the waste gas does not meet the standards due to pipeline corrosion, which in turn leads to unqualified antimony white products. An electric valve 6 is provided on the waste heat transmission pipeline 7, and the electric valve 6 is connected to the PLC automatic control system 8. The function of the electric valve 6 is to adjust the valve opening in a timely manner according to the pressure situation transmitted by the pressure transmitter 2 to ensure the pressure balance of the entire pipeline and avoid equipment failures caused by excessive pressure. The air volume design requirements of the blower 1 and the exhaust fan 5 must be that the air volume of the blower is slightly higher than that of the exhaust fan to ensure that all the generated high-temperature waste gas is reused.

[0018] The present utility model adds a waste heat transmission pipeline between the exhaust fan and the blower, and controls the valve opening of the electric valve through a pressure transmitter to realize the reuse of high-temperature waste gas. On the one hand, the high-temperature waste gas is used instead of air for antimony white production to reduce gas energy consumption; on the other hand, by setting a pressure transmitter to control the opening of the electric valve, the pressure balance of the entire pipeline is ensured to achieve safe operation. The present utility model has a high safety factor and has a relatively significant effect in reducing the processing cost of products.

[0019] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. An apparatus for producing antimony white by utilizing waste heat of waste gas to reduce energy consumption, characterized in that It includes a blower (1), the blower (1) is connected to an antimony white oxidation pot (3) through a pipeline, the antimony white oxidation pot (3) is connected to an antimony white collector (4) through a pipeline, pressure transmitters (2) are provided on the pipelines between the blower (1) and the antimony white oxidation pot (3), and between the antimony white oxidation pot (3) and the antimony white collector (4), the pressure transmitters (2) are connected to a PLC automatic control system (8), the antimony white collector (4) is connected to an exhaust fan (5), the exhaust fan (5) is connected to the blower (1) through a waste heat transfer pipeline (7), an electric valve (6) is provided on the waste heat transfer pipeline (7), and the electric valve (6) is connected to the PLC automatic control system (8).

2. The device for producing antimony white by using waste heat of waste gas to reduce energy consumption according to claim 1, characterized in that An air purifier is provided inside the blower (1).

3. The device for producing antimony white by utilizing waste heat of exhaust gas to reduce energy consumption according to claim 1 or 2, characterized in that The waste heat transfer pipeline (7) is made of stainless steel.

4. An apparatus for producing antimony white by utilizing waste heat of exhaust gas to reduce energy consumption according to claim 1 or 2, characterized in that The air volume of the blower (1) is higher than that of the exhaust fan (5).

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