Waste heat recycling device of calcining rotary kiln for zinc oxide production

Abstract

The utility model is suitable for the technical field of zinc oxide production, and provides a waste heat recycling device of a calcining rotary kiln for zinc oxide production, which comprises a base, the heat storage box is mounted at the top of the base; the water tank is mounted at the top of the base, and the water tank is used for storing clean water; the tail gas pipe is mounted in the heat storage tank and connected with a tail gas port of the rotary furnace for producing and calcining zinc oxide, and a metal pipe section which is positioned in the water tank and is used for heating clear water is arranged on the tail gas pipe; and the protective cover is mounted at the top of the heat storage box. According to the calcining rotary kiln waste heat recycling device for zinc oxide production, efficient recycling and diversified utilization of tail gas waste heat of the calcining rotary kiln for zinc oxide production can be achieved, and waste is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of zinc oxide production technology, and in particular relates to a waste heat recovery and utilization device for calcination rotary kiln in zinc oxide production. Background Technology

[0002] In the zinc oxide preparation process, a calcining rotary kiln is used to calcine and decompose basic zinc carbonate at high temperature to prepare zinc oxide. The calcining rotary kiln uses natural gas as a heat source. The combustion of natural gas in the calcining rotary kiln can reach a high temperature of about 100 degrees Celsius. During the dynamic rotation of the calcining rotary kiln, the high-temperature gas generated by the combustion of natural gas at the kiln head of the calcining rotary kiln will move with the rotation of the calcining rotary kiln through the action of a negative pressure fan. This high-temperature gas will gradually move towards the kiln tail of the calcining rotary kiln for calcination. The exhaust gas discharged from the calcining rotary kiln still has a certain temperature of waste heat. Directly discharging it would cause energy waste. Utility Model Content

[0003] This invention provides a waste heat recovery and utilization device for calcination rotary kilns used in zinc oxide production, aiming to solve the problem mentioned in the background art that the waste heat discharged from the calcination rotary kiln still has a certain temperature, and direct discharge will cause energy waste.

[0004] To solve the above problems, this utility model is implemented as follows: a waste heat recovery and utilization device for a calcination rotary kiln in zinc oxide production, comprising: a base; a heat storage box, the heat storage box being installed on top of the base; a water tank, the water tank being installed on top of the base, the water tank being used to store clean water; a tail gas pipe, the tail gas pipe being installed inside the heat storage box and connected to the tail gas port of the zinc oxide calcination rotary kiln, the tail gas pipe being provided with a metal pipe section located inside the water tank for heating clean water; and a protective cover, the protective cover being installed on top of the heat storage box, the protective cover having a detachable support plate for holding materials installed inside the protective cover, the support plate being located directly above the heat storage box.

[0005] Preferably, the protective cover has a dehumidification box on top, and the top and bottom of the dehumidification box and the top of the heat storage box are all provided with isolation nets. The protective cover has an operating port that allows the support plate to pass through, and the support plate is fixed with a baffle for closing the operating port.

[0006] Preferably, a cooling box is installed on the side of the water tank away from the heat storage box, a filter box is installed on the top of the base, the exhaust pipe extends through the cooling box into the filter box, and the cooling box is filled with cooling water.

[0007] Preferably, a booster pipe is installed at the exhaust end of the filter box, a duct is fixed to the top of the base, the booster pipe extends into the duct, a wind turbine is installed inside the duct, and multiple fan blades are installed on the wind turbine.

[0008] Preferably, a replenishment pipe and a drain pipe are installed at the top and bottom of the water tank, respectively. A valve is installed on the drain pipe, and a protective cover is detachably installed on the replenishment pipe. A dustproof net is provided on the protective cover. A hot water pump is installed at the bottom of the cooling box, and the inlet end of the hot water pump extends into the cooling box.

[0009] Preferably, temperature sensors are fixed on both the water tank and the cooling box, and the detection probes of the two temperature sensors extend into the water tank and the cooling box, respectively.

[0010] Preferably, a plurality of support rods are fixed inside the protective cover, the support rods are used to support the support plate, and a protective plate for isolating the filter material is detachably installed on one side of the filter box, and a handle is installed on the protective plate.

[0011] Compared with related technologies, the waste heat recovery and utilization device for calcination rotary kiln in zinc oxide production provided by this utility model has the following beneficial effects:

[0012] Compared with existing technologies, the waste heat recovery and utilization device for calcination rotary kilns in zinc oxide production provided in this solution achieves efficient recovery and diversified utilization of waste heat from the exhaust gas of calcination rotary kilns in zinc oxide production by integrating components such as a heat storage box, water tank, exhaust gas pipe, protective cover, cooling box, filter box, and wind generator. This device not only improves the efficiency of heat recovery but also provides additional energy sources for the system, such as heating, industrial water preheating, and electricity generation, further improving energy utilization efficiency. At the same time, the addition of dehumidification boxes, isolation nets, operation ports, and baffles optimizes the ease of operation and safety of the device. In addition, the configuration of temperature sensors, hot water pumps, and replenishment pipes enhances the reliability and flexibility of the system, achieving the goals of energy conservation and emission reduction, efficient resource utilization, and environmental protection, and has high practical value and social benefits. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of a waste heat recovery and utilization device for calcination rotary kiln in zinc oxide production provided by this utility model;

[0014] Figure 2 This is a schematic diagram of the main cross-sectional structure of a waste heat recovery and utilization device for calcination rotary kiln in zinc oxide production provided by this utility model;

[0015] Figure 3 This is a schematic diagram of the front sectional view of the thermal storage box of this utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the support plate in this utility model.

[0017] Reference numerals in the attached diagram: 1. Base; 2. Heat storage box; 3. Water tank; 4. Cooling box; 5. Filter box; 6. Booster pipe; 7. Air duct; 8. Exhaust pipe; 9. Hot water pump; 10. Temperature sensor; 11. Protective cover; 12. Dehumidifier box; 13. Support plate; 14. Support rod; 15. Isolation net; 16. Wind turbine; 17. Fan blade; 18. Control port; 19. Baffle. Detailed Implementation

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] This utility model provides a waste heat recovery and utilization device for calcination rotary kilns used in zinc oxide production, such as... Figure 1-4 As shown, the waste heat recovery and utilization device for calcination rotary kiln in zinc oxide production includes: a base 1; a heat storage box 2, which is installed on top of the base 1; a water tank 3, which is installed on top of the base 1 and is used to store clean water; a tail gas pipe 8, which is installed inside the heat storage box 2 and connected to the tail gas port of the zinc oxide calcination rotary kiln, and the tail gas pipe 8 is provided with a metal pipe section located inside the water tank 3 for heating clean water; and a protective cover 11, which is installed on top of the heat storage box 2, and a support plate 13 for holding materials is detachably installed inside the protective cover 11, and the support plate 13 is located directly above the heat storage box 2.

[0021] In this embodiment, the base 1 serves as the supporting foundation for the entire waste heat recovery and utilization device, ensuring the device's stability and facilitating the installation and fixing of other components. The heat storage tank 2 is used to store and transfer the waste heat recovered from the tail gas of the calcining rotary kiln. The water tank 3 is used to store clean water, which is heated by the tail gas through metal pipes. Utilizing the waste heat to heat the clean water in the water tank 3 provides an additional avenue for heat energy utilization, such as heating or preheating industrial water. The tail gas pipe 8 is connected to the tail gas outlet of the zinc oxide production calcining rotary kiln. The tail gas heats the clean water through the metal pipes within it, effectively transferring the waste heat from the calcining rotary kiln's tail gas to the water tank 3, thus improving the heat energy recovery efficiency. The metal pipes, as the medium for heat energy transfer, improve the heat energy conversion efficiency. The protective cover 11 provides additional protection and insulation, preventing heat loss and protecting operators from high-temperature injuries. The support plate 13 is used to hold materials, such as zinc oxide or other substances to be heated or dried. Utilizing the waste heat stored in the heat storage tank 2 to heat or dry the materials further improves energy utilization efficiency.

[0022] In a further preferred embodiment of the present invention, a dehumidification box 12 is provided on the top of the protective cover 11, and an isolation net 15 is provided on the top and bottom of the dehumidification box 12 and the top of the heat storage box 2. An operation port 18 is provided on the protective cover 11 to allow the support plate 13 to pass through, and a baffle 19 for closing the operation port 18 is fixed on the support plate 13.

[0023] In this embodiment, the dehumidification box 12 is used to remove moisture from the air entering the protective cover 11, preventing moisture from adversely affecting the heat storage effect and materials, improving the dryness inside the heat storage box 2 and the protective cover 11, ensuring the effective utilization of waste heat and the drying quality of materials. The isolation net 15 is used to prevent foreign objects from entering and heat loss, improving energy utilization efficiency. The operation port 18 allows the support plate 13 to easily enter and exit the protective cover 11, facilitating the replacement or loading of materials, improving the operational convenience of the device, and making the material replacement and loading process more efficient. The baffle 19 is used to form a seal at the operation port 18 to prevent heat loss and the entry of external impurities.

[0024] In a further preferred embodiment of this utility model, a cooling box 4 is installed on the side of the water tank 3 away from the heat storage box 2, a filter box 5 is installed on the top of the base 1, the exhaust pipe 8 extends through the cooling box 4 into the filter box 5, and the cooling box 4 is filled with cooling water.

[0025] In this embodiment, the cooling box 4 absorbs heat from the exhaust gas using cooling water, further reducing the temperature of the exhaust gas and minimizing its thermal impact on the subsequent filter box 5 and the environment. Simultaneously, the cooling water can be preheated by the exhaust gas, improving the overall system's heat recovery efficiency. The filter box 5 is used to purify the exhaust gas, removing particulate matter and harmful gases. Filtration significantly reduces the pollution of the exhaust gas to the environment, improving the device's environmental performance. Furthermore, the purified exhaust gas better meets emission standards, contributing to the company's sustainable development.

[0026] In a further preferred embodiment of the present invention, a booster pipe 6 is installed at the exhaust end of the filter box 5, and a duct 7 is fixed at the top of the base 1. The booster pipe 6 extends into the duct 7, and a wind turbine 16 is installed inside the duct 7. Multiple fan blades 17 are installed on the wind turbine 16.

[0027] In this embodiment, the booster pipe 6 introduces the exhaust gas purified by the filter box 5 into the duct 7. The booster pipe 6 increases the pressure or flow rate of the exhaust gas by reducing the inner diameter of the exhaust port. By increasing the pressure or flow rate of the exhaust gas, the fan blades 17 inside the duct 7 can be rotated more effectively, thereby improving the power generation efficiency of the wind turbine 16. The duct 7 provides a controlled environment to ensure that the exhaust gas can be efficiently transmitted to the wind turbine 16, while reducing energy loss and environmental pollution. The wind turbine 16 uses the kinetic energy generated by the exhaust gas flow to drive the fan blades 17 to rotate, thereby generating electricity, providing an additional energy source for the device and further improving the energy utilization efficiency of the entire system. This not only helps to reduce dependence on traditional energy sources, but also helps to reduce production costs and environmental impact.

[0028] In a further preferred embodiment of this utility model, a replenishment pipe and a drain pipe are respectively installed at the top and bottom of the water tank 3. A valve is installed on the drain pipe, and a protective cover is detachably installed on the replenishment pipe. A dustproof net is provided on the protective cover. A hot water pump 9 is installed at the bottom of the cooling box 4, and the inlet end of the hot water pump 9 extends into the cooling box 4.

[0029] In this embodiment, the replenishment pipe is used to replenish clean water or other working media into the water tank 3, and the drain pipe is used to discharge the media in the water tank 3. The valve installed on the drain pipe can control the discharge of the media and also facilitate the maintenance and repair of the water tank 3. The protective cover and dustproof net improve the cleanliness and reliability of the system and prevent impurities from clogging or damaging the water tank 3 and the replenishment pipe. The hot water pump 9 enables the hot water heated by the exhaust gas to be effectively extracted and utilized, thereby improving the heat recovery efficiency of the system.

[0030] In a further preferred embodiment of this utility model, temperature sensors 10 are fixed on both the water tank 3 and the cooling box 4, and the detection probes of the two temperature sensors 10 extend into the water tank 3 and the cooling box 4 respectively.

[0031] In this embodiment, the temperature sensor 10 can monitor the temperature of the medium in the water tank 3 and the cooling box 4 in real time and accurately, providing important operating data for the operator. When the medium temperature exceeds the preset safety range, the temperature sensor 10 can send a signal, which, in conjunction with the external alarm system, reminds the operator to take timely measures to prevent the equipment from overheating or being damaged.

[0032] In a further preferred embodiment of the present invention, a plurality of support rods 14 are fixed inside the protective cover 11. The support rods 14 are used to support the support plate 13. A protective plate for isolating the filter material is detachably installed on one side of the filter box 5. A handle is installed on the protective plate.

[0033] In this embodiment, by adding support rod 14, the support plate 13 and the material on it can be supported more effectively, preventing the material from falling off or being damaged due to vibration or external force during the calcination process. At the same time, support rod 14 also improves the structural strength and stability of protective cover 11. The protective plate is used to isolate the filter material, which facilitates the replacement and cleaning of the filter material. By installing handle, the protective plate can be held and moved more conveniently, thereby simplifying the operation process of filter material replacement and cleaning. At the same time, the handle also improves the safety and convenience of the operator.

[0034] In summary, compared with related technologies, this device, by integrating components such as the heat storage box 2, water tank 3, exhaust pipe 8, protective cover 11, cooling box 4, filter box 5, and wind generator 16, achieves efficient recovery and diversified utilization of waste heat from the exhaust gas of the rotary kiln in zinc oxide production. This device not only improves the efficiency of heat recovery but also provides additional energy sources for the system, such as heating, industrial water preheating, and electricity generation, further improving energy utilization efficiency. At the same time, the addition of a dehumidification box 12, isolation net 15, operation port 18, and baffle 19 optimizes the ease of operation and safety of the device. In addition, the configuration of temperature sensor 10, hot water pump 9, and replenishment pipe also enhances the reliability and flexibility of the system, achieving the goals of energy conservation, emission reduction, efficient resource utilization, and environmental protection, and has high practical value and social benefits.

[0035] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A calcination rotary kiln waste heat recovery and utilization device for zinc oxide production, characterized by, The utility model provides a kind of zinc oxide production calcination rotary furnace, including: Base; Heat storage tank, the heat storage tank is installed on the top of the base; Water tank, the water tank is installed on the top of the base, and the water tank is used to store clean water; Tail gas pipe, the tail gas pipe is installed in the heat storage tank and is connected with the tail gas port of zinc oxide production calcination rotary furnace, and the tail gas pipe is provided with a metal pipe section for heating clean water in the water tank; Protective cover, the protective cover is installed on the top of the heat storage tank, and a support disc for containing materials is detachably installed in the protective cover, and the support disc is located directly above the heat storage tank.

2. The calcination rotary kiln waste heat recovery and utilization device for zinc oxide production according to claim 1, characterized in that, The top of the protective cover is provided with a dehumidification box, and the top and bottom of the dehumidification box and the top of the heat storage tank are provided with isolation nets, and the protective cover is provided with an operation opening allowing the support disc to pass through, and the support disc is fixed with a baffle for closing the operation opening.

3. The calcination rotary kiln waste heat recovery and utilization device for zinc oxide production according to claim 1, characterized in that, The side of the water tank away from the heat storage tank is provided with a cooling tank, and the top of the base is provided with a filter box, and the tail gas pipe extends through the cooling tank into the filter box, and the cooling tank is filled with cooling water.

4. The calcination rotary kiln waste heat recovery and utilization device for zinc oxide production according to claim 3, characterized in that, The exhaust end of the filter box is provided with a booster pipe, and the top of the base is fixed with an air pipe, and the booster pipe extends into the air pipe, and the air pipe is provided with a wind power generator, and the wind power generator is provided with a plurality of fan blades.

5. The waste heat recovery and utilization device for a calcination rotary kiln for producing zinc oxide according to claim 3, characterized in that, The top and bottom of the water tank are respectively provided with a liquid supplementing pipe and a liquid discharging pipe, the liquid discharging pipe is provided with a valve, and the liquid supplementing pipe is detachably provided with a protective cover, and the protective cover is provided with a dustproof net, and the bottom of the cooling tank is provided with a hot water pump, and the liquid inlet end of the hot water pump extends into the cooling tank.

6. The calcination rotary kiln waste heat recovery and utilization device for zinc oxide production according to claim 3, characterized in that, The water tank and the cooling tank are both provided with temperature sensors, and the detection probes of the two temperature sensors extend into the water tank and the cooling tank respectively.

7. The calcination rotary kiln waste heat recovery and utilization device for zinc oxide production according to claim 3, characterized in that, The protective cover is fixed with a plurality of support rods, and the support rods are used to support the support disc, and one side of the filter box is detachably provided with a protective plate for isolating filter material, and the protective plate is provided with a handle.

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