Glass melting tank cooling and waste heat recovery device

Abstract

The invention discloses a glass melting tank cooling and waste heat recovery device in the field of waste heat recovery, which comprises a melting tank, a plurality of equidistant mounting grooves are formed in the outer side surface of the melting tank, heat exchange water tanks are arranged in the mounting grooves, the heat exchange water tanks are in contact with the outer side surface of the melting tank, and the plurality of heat exchange water tanks are connected with low-temperature water pipes in a penetrating manner; according to the cooling device, the pool wall bricks can be effectively cooled, the temperature of the outer walls of the pool wall bricks can be kept within a set temperature interval, meanwhile, the cooling cost of the kiln can be greatly reduced, the energy consumption is reduced, and the energy consumption is reduced. The problem that local temperature is too high in the later period of the kiln can be solved, cracks of the pickaxe corundum bricks and recovery and utilization of heat energy cannot be caused, heat energy needing to be dissipated by the pool wall bricks can be collected, and the collected heat energy can be used in production or life and can also be used for commercial activities such as waste heat power generation or heat supply.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery, and more particularly to a device for cooling a glass melting tank and recovering waste heat. Background Art

[0002] In the flat glass and daily-use glass industries, the glass industrial tank furnace is built with corundum bricks. The working temperature of the corundum bricks is 1200°C - 1600°C, and the furnace temperature of the industrial tank furnace during daily operation is 1400°C - 1600°C. Due to the high working temperature, the glass liquid has a strong erosion effect at high temperatures, especially at the glass liquid surface position where the corrosion rate is the highest. Therefore, forced cooling must be carried out outside to extend the service life of the glass industrial tank furnace. The current technology is air-cooling. The method is to use a large fan to extract normal-temperature air, and the air is transported through a pipeline to both sides of the melting tank, and then blown through branch pipes to the gaps reserved at the upper ends of the outer wall bricks of the melting tank (the inner side of this gap is the glass liquid surface position). The rapid flow of air is used to cool the wall bricks. The fan is controlled by a frequency converter to control the air volume and avoid energy waste caused by excessive cooling. However, due to the distribution problem of the air duct outlets, the heat dissipation of some wall bricks will be poor, reducing the service life of the glass industrial tank furnace. At the same time, a large amount of heat is dissipated, resulting in energy waste.

[0003] The current technology is air-cooling. The method is to use a large fan to extract normal-temperature air, and the air is transported through a pipeline to both sides of the melting tank, and then blown through branch pipes to the grooves reserved at the upper ends of the outer wall bricks of the melting tank (the inner side of this groove is the glass liquid surface position). The rapid flow of air is used to cool the wall bricks. The fan is controlled by a frequency converter to control the air volume and avoid energy waste caused by excessive cooling.

[0004] Due to the distribution problem of the air duct outlets, the heat dissipation of some wall bricks will be poor. When the temperature at individual points is too high, compressed air needs to be used for key cooling, reducing the service life of the glass industrial tank furnace. At the same time, a large amount of heat is dissipated, resulting in energy waste. In the later stage of the glass industrial tank furnace, air-cooling can no longer meet the cooling requirements, and water needs to be sprayed onto the wall bricks for cooling. Although spraying water onto the wall bricks can achieve a rapid cooling effect, it also causes a large number of cracks to appear on the wall bricks, reducing the recoverable usage amount of corundum bricks and causing certain economic losses. Summary of the Invention

[0005] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] The object of the present invention is to address the technical problems existing in the background art. The present invention proposes a device for cooling a glass melting tank and recovering waste heat. This patent can effectively cool the wall bricks of the tank, keep the outer wall temperature of the wall bricks within a set temperature range, and at the same time can greatly reduce the cooling cost of the kiln. In the later stage of the kiln, it can also handle the problem of excessive local temperature and will not cause cracks in the corundum bricks. Regarding the recovery and utilization of heat energy, this patent can collect the heat energy that needs to be dissipated from the wall bricks of the tank, and the collected heat energy can be used in production or life, or can be used for commercial activities such as waste heat power generation or heating.

[0007] The present invention proposes a device for cooling a glass melting tank and recovering waste heat, including a melting tank. A number of equally spaced installation grooves are provided on the outer side of the melting tank. A heat exchange water tank is arranged inside the installation groove, and the heat exchange water tank is in contact with the outer side of the melting tank. A number of heat exchange water tanks are connected through a low-temperature water pipe, and a number of heat exchange water tanks are connected through a high-temperature water pipe. The high-temperature water pipe penetrates the side of the installation groove, and the low-temperature water pipe penetrates the side of the installation groove. The low-temperature water pipe is connected with a water replenishing component, and the high-temperature water pipe is connected with a waste heat recovery component.

[0008] By adopting the above technical solution, in this solution, the water replenishing component can supplement the circulating water during the heat exchange cycle, thereby ensuring stable heat exchange efficiency. The use of independent low-temperature and high-temperature water pipes can achieve the effect of one-way liquid circulation inside the heat exchange water tank, and thus achieve the high-efficiency heat exchange effect of this device.

[0009] Preferably, the water replenishing component includes a regulating valve connected to the low-temperature water pipe. The other end of the regulating valve is connected to a circulating water tank, and the other end of the circulating water tank is connected to the low-temperature water pipe.

[0010] By adopting the above technical solution, in this solution, the regulating valve can achieve the effect of controlling and adjusting the water flow rate inside the heat exchange water tank.

[0011] Preferably, a water replenishing pipe penetrates and connects to the outer arc surface of the circulating water tank. The other end of the water replenishing pipe is connected to a water replenishing valve, and the other end of the water replenishing valve is connected to a water replenishing tank.

[0012] By adopting the above technical solution, in this solution, the water replenishing pipe can supplement the water inside the circulating water tank.

[0013] Preferably, the penetration connection part of the water replenishing pipe and the circulating water tank is higher than the penetration connection part of the water replenishing valve and the outer arc surface of the water replenishing tank. An air inlet hole is provided at the top of the water replenishing tank, and an air inlet hole is provided at the top of the circulating water tank.

[0014] By adopting the above technical solution, this solution can facilitate the discharge of internal air when the water level in the water tank changes through the structure of the air inlet hole, ensuring stable water pressure. At the same time, the water replenishing valve can control the degree of water replenishment, and the water replenishing tank is arranged higher than the circulating water tank, thereby realizing the water replenishing effect of this device.

[0015] Preferably, the waste heat recovery component includes a waste heat pipe connected to one end of the high-temperature water pipe. The high-temperature water pipe is branched to connect to a branch pipe, and the branch pipe is connected to a flow control valve.

[0016] By adopting the above technical solution, this solution can control the water flow rate through the waste heat component by the flow control valve. Since there is no water flow resistance in the branch pipe and the waste heat component generates resistance to the water flow, the water inflow into the waste heat component can be controlled by adjusting the flow control valve.

[0017] Preferably, the waste heat pipe is connected to a waste heat component. One end of the flow control valve away from the branch pipe is connected to the high-temperature water pipe, and one end of the waste heat component away from the waste heat pipe is connected to the high-temperature water pipe. A circulating water pump is provided outside the circulating water tank, and the waste heat component includes a circulating water pump.

[0018] By adopting the above technical solution, this solution can ensure the circulating flow of water through the circulating water pump structure, ensuring stable heat exchange efficiency.

[0019] In summary, the present invention has at least the following beneficial effects:

[0020] Cooling efficiency and cost: This patent can effectively cool the pool wall bricks, keep the outer wall temperature of the pool wall bricks within the set temperature range, and at the same time can greatly reduce the cooling cost of the kiln. In the later stage of the kiln, it can also cope with the problem of local overheating, and will not cause cracks in the corundum bricks.

[0021] Recovery and utilization of heat energy: This patent can collect the heat energy that the pool wall bricks need to dissipate. The collected heat energy can be used in production or life, or can be used for commercial activities such as waste heat power generation or heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is the front view of the embodiment of a glass melting pool cooling and waste heat recovery device of the present invention;

[0024] Figure 2Schematic diagram of the structure of the heat exchange water tank in the embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the structure of the waste heat component in the embodiment of the present invention;

[0026] Reference numerals: 1, melting pool; 2, installation groove; 3, heat exchange water tank; 4, low-temperature water pipe; 5, high-temperature water pipe; 6, water replenishing component; 601, regulating valve; 602, circulating water tank; 603, water replenishing pipe; 604, water replenishing valve; 605, water replenishing tank; 7, waste heat recovery component; 701, branch pipe; 702, flow dividing valve; 703, waste heat component; 704, waste heat pipe. Detailed implementation manners

[0027] The following further describes the present invention in detail with reference to the Figures 1 - 3 accompanying drawings.

[0028] Embodiment 1

[0029] As Figures 1 - 3 shown, in this embodiment, in order to solve the existing problems, the present invention discloses a glass melting pool cooling and waste heat recovery device, including a melting pool 1. A plurality of equally spaced installation grooves 2 are provided on the outer side surface of the melting pool 1. A heat exchange water tank 3 is arranged inside the installation groove 2. The heat exchange water tank 3 is in contact with the outer side surface of the melting pool 1. A plurality of heat exchange water tanks 3 are connected through a low-temperature water pipe 4, and a plurality of heat exchange water tanks 3 are connected through a high-temperature water pipe 5. The high-temperature water pipe 5 penetrates through the side surface of the installation groove 2, and the low-temperature water pipe 4 penetrates through the side surface of the installation groove 2. The low-temperature water pipe 4 is connected with a water replenishing component 6, and the high-temperature water pipe 5 is connected with a waste heat recovery component 7.

[0030] The water replenishing component 6 includes a regulating valve 601 connected to the low-temperature water pipe 4. The other end of the regulating valve 601 is connected with a circulating water tank 602, and the other end of the circulating water tank 602 is connected with the low-temperature water pipe 4.

[0031] The outer arc surface of the circulating water tank 602 is connected through a water replenishing pipe 603. The other end of the water replenishing pipe 603 is connected with a water replenishing valve 604, and the other end of the water replenishing valve 604 is connected with a water replenishing tank 605.

[0032] The penetration connection part of the water replenishing pipe 603 and the circulating water tank 602 is higher than the penetration connection part of the water replenishing valve 604 and the outer arc surface of the water replenishing tank 605. An air inlet hole is provided at the top of the water replenishing tank 605, and an air inlet hole is provided at the top of the circulating water tank 602.

[0033] The waste heat recovery component 7 includes a waste heat pipe 704 connected to one end of the high-temperature water pipe 5. The high-temperature water pipe 5 is branched to be connected with a branch pipe 701, and the branch pipe 701 is connected with a flow dividing valve 702.

[0034] High-temperature water is connected to the heat exchanger of the waste heat generator through a water pipe. After heat exchange, the water temperature drops, and the cooled water is transported to the circulation water tank 602 by a multistage centrifugal pump.

[0035] The high-temperature water is transported to the circulation water tank 602 by a multistage centrifugal pump, and steam is generated in the tank. The steam is transported to the places where gas is needed.

[0036] The water tank uses a pressure-bearing type. A safety valve and a pressure regulating valve are installed on the water tank. The pressure regulating valve can be used to adjust the pressure of the circulation water tank 602, and then adjust the boiling point of the water (the surplus heat can be discharged in the form of steam). The circulation water tank 602 is connected to the low-temperature water pipe 4 to carry out circulating cooling. A pressure reducing valve is installed at the main pipe of the low-temperature water pipe 4 to ensure that the pressure in the pipeline and the cooling water tank is in a lower state during operation, ensuring that the water tank does not deform. Temperature sensors are installed on each cooling water tank, and the data is transmitted to the control system. The electric valves installed on the low-temperature water pipe 4 can be adjusted or manually adjusted on the system to keep the temperature of each water tank within the set temperature range, avoiding energy waste caused by excessive cooling. A soft water preparation water tank is installed beside the circulation water tank 602, and the prepared soft water is used to replenish the circulation water tank 602 through an independent multistage centrifugal pump.

[0037] Embodiment 2

[0038] As Figures 1 - 3 shown, in this embodiment, in order to solve the existing problems and based on the same concept as in Embodiment 1 above, the glass melting tank cooling and waste heat recovery device further includes: the waste heat pipe 704 is connected to a waste heat component 703, one end of the flow dividing valve 702 away from the branch pipe 701 is connected to the high-temperature water pipe 5, and one end of the waste heat component 703 away from the waste heat pipe 704 is connected to the high-temperature water pipe 5.

[0039] The method of using a water tank plus circulating water is used to cool the tank wall bricks. The water tank uses a pressure-type water tank. A pressure reducing valve is installed at the main pipeline of the low-temperature water pipe 4 at the outlet of the circulation water tank 602. The water circulation adopts a pumping type (negative pressure type) to ensure that the pressure in the pipeline and the cooling water tank is in a lower state during operation, ensuring that the water tank does not deform. Since there is no air in the pipeline, the water temperature of the low-temperature water pipe of the circulating water can be controlled at about 150 °C, which can reduce the excessive cooling of the tank wall bricks and avoid energy waste.

[0040] The system is used to manage and control the cooling, avoiding the lack of monitoring during manual management, and can greatly improve the operation safety of the glass industrial furnace.

[0041] It is possible to use oil with greater fluidity to replace water. Used transformer oil is the most economical. A pressure regulating valve cannot be installed on the circulating oil tank. A cooling tower needs to be installed before entering the circulating oil tank to dissipate excess heat and ensure the safety of the oil tank. This solution can only be connected to waste heat power generation equipment. When heating, due to the large amount of oil required, circulating pipelines also need to be laid, resulting in poor economic efficiency. At the same time, there are also significant environmental risks.

[0042] It is possible to use Freon R32 to replace water, but the water tank needs to be replaced with an aluminum plate with multiple ventilation holes. Copper tubes are pressed into the ventilation holes. An electric valve needs to be installed at the interface end (high-temperature tube) of the copper tube. Flow meters need to be installed at the high- and low-temperature tube ends. The system can confirm whether there is a leak based on the flow value deviation at both ends of the same aluminum plate. When a leak occurs, the electric valve is closed immediately to reduce the impact of Freon on the environment. A large drying filter needs to be installed to replace the circulating water tank in the original solution. A cooling tower is installed before entering the drying filter to act as a condenser to dissipate excess heat and ensure the safety and operating efficiency of the drying filter. This solution can only be connected to waste heat power generation equipment. When heating, due to the large amount of Freon required, circulating pipelines also need to be laid, resulting in poor economic efficiency.

[0043] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A glass melting pool cooling and waste heat recovery device, comprising a melting pool (1), characterized in that: The outer side of the melting pool (1) is provided with a plurality of equally spaced installation grooves (2), a heat exchange tank (3) is provided inside the installation groove (2), the heat exchange tank (3) is in contact with the outer side of the melting pool (1), a plurality of heat exchange tanks (3) are connected through low-temperature water pipes (4), a plurality of heat exchange tanks (3) are connected through high-temperature water pipes (5), the high-temperature water pipes (5) pass through the side of the installation groove (2), the low-temperature water pipes (4) pass through the side of the installation groove (2), the low-temperature water pipes (4) are connected to a water replenishment component (6), and the high-temperature water pipes (5) are connected to a waste heat recovery component (7).

2. A glass melting pool cooling and waste heat recovery device according to claim 1, characterized in that: The water replenishment component (6) comprises a regulating valve (601) connected to the low-temperature water pipe (4), the other end of the regulating valve (601) is connected to a circulating water tank (602), and the other end of the circulating water tank (602) is connected to the low-temperature water pipe (4).

3. A glass melting pool cooling and waste heat recovery device according to claim 2, characterized in that: A water supply pipe (603) is connected through the outer arc surface of the circulating water tank (602), the other end of the water supply pipe (603) is connected to a water supply valve (604), and the other end of the water supply valve (604) is connected to a water supply tank (605).

4. A glass melting pool cooling and waste heat recovery device according to claim 3, characterized in that: The connection point between the water replenishment pipe (603) and the circulating water tank (602) is higher than the connection point between the water replenishment valve (604) and the outer arc surface of the water replenishment tank (605). An air inlet hole is provided at the top of the water replenishment tank (605), and an air inlet hole is provided at the top of the circulating water tank (602).

5. A glass melting pool cooling and waste heat recovery device according to claim 4, characterized in that: The waste heat recovery component (7) comprises a waste heat pipe (704) connected to one end of the high-temperature water pipe (5); the high-temperature water pipe (5) is branched and connected to a branch pipe (701); and the branch pipe (701) is connected to a diverter valve (702).

6. A glass melting pool cooling and waste heat recovery device according to claim 5, characterized in that: The waste heat pipe (704) is connected to a waste heat component (703), one end of the diverter valve (702) away from the branch pipe (701) is connected to the high-temperature water pipe (5), and one end of the waste heat component (703) away from the waste heat pipe (704) is connected to the high-temperature water pipe (5).

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