Ceramic zinc pot gas internal heating device

Abstract

The utility model relates to ceramic zinc pot gas inner heating technical field, and disclose ceramic zinc pot gas inner heating device, ceramic zinc pot gas inner heating device, including zinc pot body, the zinc pot body inner wall all fixedly embedded with several groups's heat pipe, and the heat pipe is used for heating the zinc liquid in the zinc pot body inside, every group's heat pipe outlet end is connected with the gas outlet pipe, and the gas outlet pipe's outlet end is equipped with the second regulating valve, through the heat pipe even distribution in the zinc pot body pot wall around, adopt the zinc pot body inside direct heating mode and give the zinc liquid even heating, compared with the original bottom heating can effectively reduce the zinc slag, the high temperature flue gas produced by the burner passes through the heat pipe inside and directly heats the zinc liquid, does not contact with the zinc pot body, does not exist because of the zinc pot body material thermal conductivity is bad and leads to the problem of low heat energy efficiency, and further saves the investment for the user, and combustion air fan will deliver combustion air to the air heat exchanger, and the combustion air exchanges heat with the waste gas from the heat pipe.

Description

Technical Field

[0001] This utility model relates to the field of gas-fired internal heating technology for ceramic zinc pots, specifically a gas-fired internal heating device for ceramic zinc pots. Background Technology

[0002] In the hot-dip galvanizing process, the zinc pot is one of the core pieces of equipment. It is used to hold the molten zinc and maintain it within a suitable temperature range to ensure the smooth progress of the galvanizing process.

[0003] Traditional bottom heating of zinc pots involves heat transfer from the bottom upwards. Due to uneven heating of the molten zinc, the temperature near the bottom is too high, which can cause impurities in the molten zinc to react chemically and form zinc dross. The formation of zinc dross not only consumes a large amount of zinc and increases production costs, but also affects the quality of the galvanized layer. At the same time, the pot body is subjected to high external heating for a long time and is in direct contact with the molten zinc, which can easily lead to local damage, deformation and cracking due to thermal stress and corrosion. Therefore, a gas-fired internal heating device for ceramic zinc pots is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a gas-fired internal heating device for a ceramic zinc pot to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas-fired internal heating device for a ceramic zinc pot, comprising a zinc pot body, wherein several sets of heat-conducting pipes are fixedly embedded around the inner wall of the zinc pot body, and the heat-conducting pipes are used to heat the molten zinc inside the zinc pot body;

[0006] Each heat pipe in the group is connected to an outlet pipe at its outlet end, and a second regulating valve is installed at the outlet end of the outlet pipe.

[0007] Each heat pipe in the group is connected to an air inlet pipe at its air inlet end, and a burner is installed at the air inlet end of the air inlet pipe.

[0008] The air inlet ends of several of the air inlet pipes are connected to a first pipe, and the air inlet ends of the first pipe are connected to an air heat exchanger, which is used to heat the combustion air entering the inside of the heat-conducting pipe.

[0009] The outlet ends of several of the air outlet pipes are connected to a second pipe, the inlet end of the air heat exchanger is connected to a combustion-supporting fan, and a first regulating valve is installed at the outlet of the combustion-supporting fan. The first regulating valve is used to automatically adjust the consumption of combustion-supporting air according to the load required by the zinc pot body.

[0010] Preferably, as described above, an induced draft fan is provided on one side of the air heat exchanger, and the low-temperature exhaust gas outlet of the air heat exchanger is connected to the air inlet of the induced draft fan.

[0011] Preferably, the zinc pot body is composed of refractory ceramic bricks.

[0012] Preferably, the outer diameter of the heat pipe is 135 mm to 145 mm, and the wall thickness is 6 mm to 10 mm.

[0013] Preferably, the first pipe is used to heat the combustion air and introduce it into the burner for combustion, and the second pipe is used to cool the exhaust gas and discharge it.

[0014] Preferably, the combustion-supporting fan described above is used to deliver combustion-supporting air to the air heat exchanger for heat exchange with the exhaust gas.

[0015] Preferably, the heat pipe is made of silicon carbide.

[0016] Preferably, each of the heat-conducting tubes has a connecting frame fixed to the inner wall at both ends, and a U-shaped connecting tube is inserted into the inner side of the adjacent connecting frame. The space between the connecting frame and the U-shaped connecting tube is sealed with casting material.

[0017] Compared with existing technologies, this utility model, employing the above technical solution, has the following technical advantages: By evenly distributing heat pipes around the zinc pot body, the zinc liquid is heated uniformly through direct heating from within the pot body. Compared to the original bottom heating, this effectively reduces zinc dross. The high-temperature flue gas generated by the burner directly heats the zinc liquid through the heat pipes, without contacting the zinc pot body. This eliminates the problem of low thermal efficiency due to poor thermal conductivity of the zinc pot body material, thus saving investment for users. The combustion fan delivers combustion air to the air heat exchanger, where the combustion air exchanges heat with the exhaust gas from the heat pipes, reducing fuel consumption and achieving fuel savings. This improves energy utilization, reduces energy consumption, and consequently lowers pollutant emissions, meeting environmental protection requirements. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a top view of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the heat pipe of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the induced draft fan of this utility model;

[0022] Figure 4 This is a schematic diagram of the combustion fan section of this utility model;

[0023] Figure 5 This is a schematic diagram of the main structure of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Zinc pot body; 2. Burner; 3. Air heat exchanger; 4. Combustion fan; 5. First regulating valve; 6. Exhaust fan; 7. Second regulating valve; 8. First pipe; 9. Second pipe; 10. Heat-conducting pipe; 11. Connecting frame; 12. Castable refractory; 13. U-shaped connecting pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce. Example

[0027] Please see Figure 1-5 This utility model provides a technical solution: a gas-fired internal heating device for a ceramic zinc pot, including a zinc pot body 1. Several sets of heat-conducting pipes 10 are fixedly embedded around the inner wall of the zinc pot body 1. The heat-conducting pipes 10 are used to heat the molten zinc inside the zinc pot body 1. Each set of heat-conducting pipes 10 has an outlet pipe at its outlet end, and a second regulating valve 7 is installed at the outlet end of the outlet pipe. Each set of heat-conducting pipes 10 has an inlet pipe at its inlet end, and a burner 2 is installed at the inlet end of the inlet pipe. The burner 2 is a pipe-type burner. The burner 2 generates a high-temperature flame and flue gas that enters the interior of the heat-conducting pipes 10. The heat is conducted to the molten zinc through the outer wall of the heat-conducting pipes 10, uniformly heating the molten zinc. Natural gas or coke oven gas and other fuels are mixed and burned with preheated combustion air through the burner 2, generating a high-temperature flame and flue gas inside the heat-conducting pipes 10. The pipe-type burner 2 is directly installed at the inlet end of the heat-conducting pipes 10 to ensure that the flame burns completely inside the heat-conducting pipes 10, avoiding direct contact with the molten zinc.

[0028] The air inlet ends of several air inlet pipes are connected to the first pipe 8, and the air inlet ends of the first pipe 8 are connected to the air heat exchanger 3. The air heat exchanger 3 is used to heat the combustion air entering the inner side of the heat pipe 10. After the hot air is cooled down, the air supplied by the combustion fan 4 is heated to 250°C through the air heat exchanger 3 and enters the burner 2 to participate in combustion. The 500°C flue gas is cooled down by the air heat exchanger 3 and then enters the next unit by the induced draft fan 6. The combustion air participating in combustion is heated from room temperature to 250°C after passing through the air heat exchanger 3, which helps to reduce fuel consumption and achieve the purpose of saving fuel.

[0029] The outlet ends of several air outlet pipes are connected to a second pipe 9, and the inlet end of the air heat exchanger 3 is connected to a combustion fan 4. A first regulating valve 5 is installed at the outlet of the combustion fan 4. The first regulating valve 5 is used to automatically adjust the consumption of combustion air according to the load required by the zinc pot body 1. Natural gas, coke oven gas and other fuels are used to directly participate in the combustion of the burner 2. The high-temperature flue gas generated enters the heat conduction pipe 10 to heat up the zinc liquid. The burner 2 burns directly in the heat conduction pipe 10. The heat utilization rate can reach more than 95%, reducing the heat loss of the system and thus achieving the goal of saving investment for users.

[0030] An induced draft fan 6 is provided on one side of the air heat exchanger 3. The low-temperature exhaust gas outlet of the air heat exchanger 3 is connected to the air inlet of the induced draft fan 6. The zinc pot body 1 is composed of refractory ceramic bricks. The outer diameter of the heat conduction pipe 10 is 140 mm and the wall thickness of the heat conduction pipe 10 is 8 mm.

[0031] The first pipe 8 is used to heat the combustion air and introduce it into the burner 2 for combustion. The second pipe 9 is used to cool the exhaust gas and discharge it. The combustion air blower 4 is used to transport the combustion air to the air heat exchanger 3 for heat exchange with the exhaust gas. The combustion air blower 4 sends room temperature air into the air heat exchanger 3 through the first regulating valve 5. The air heat exchanger 3 uses the waste heat of the 500℃ exhaust gas at the outlet of the heat pipe 10 to preheat the combustion air to 250℃ before it is input into the first pipe 8. The preheated air is distributed to each burner 2 through the air inlet pipe, which significantly improves combustion efficiency and reduces fuel consumption.

[0032] The heat pipe 10 is made of silicon carbide, characterized by high temperature resistance, corrosion resistance, and good thermal conductivity. Each set of heat pipes 10 has a connecting bracket 11 fixed to the inner wall at both ends. A U-shaped connecting pipe 13 is inserted into the inner side of adjacent connecting brackets 11. A refractory 12 is used to seal the space between the connecting bracket 11 and the U-shaped connecting pipe 13. The U-shaped connecting pipe 13 is made of 301S stainless steel. The connecting bracket 11 and the U-shaped connecting pipe 13 are sealed together by the refractory 12, ensuring sufficient heat transfer area for the hot flue gas in the heat pipe 10. The refractory 12 prevents the hot flue gas from escaping. The heat pipes 10 inside the zinc pot body 1... With high thermal conductivity, the heat pipes 10 are evenly distributed around the wall of the zinc pot body 1, effectively transferring the heat energy of the high-temperature flue gas to the zinc pot body 1. Compared with the original bottom heating, this can effectively reduce zinc dross and improve the galvanizing quality. The high-temperature flue gas generated by the burner 2 directly heats the zinc liquid through the inside of the heat pipes 10 without contacting the zinc pot body 1. This eliminates the problem of poor thermal conductivity and low thermal efficiency of the zinc pot body 1 material. The heat pipes 10 are evenly distributed around the zinc pot body 1, forming a ring heating surface, which achieves uniform heating of the zinc liquid in all directions and effectively reduces the zinc dross generated by bottom heating.

[0033] The following are the performance differences of the gas-fired internal heating device for ceramic zinc pots before and after the improvement:

[0034]

[0035] The data above shows that the gas-fired internal heating of the ceramic zinc pot implemented in this study has achieved significant optimizations, including a 43% reduction in zinc consumption, a 20%-40% increase in thermal efficiency, and a 20%-30% reduction in fuel consumption.

[0036] Working principle: To heat the molten zinc inside the zinc pot body 1, fuels such as natural gas or coke oven gas are used for direct combustion at the burner 2. The burner 2 is a pipe type, which generates high-temperature flames and flue gas. The high-temperature flames and flue gas enter the interior of the heat-conducting pipe 10, and the heat is conducted through the outer wall of the heat-conducting pipe 10 to the molten zinc inside the zinc pot body 1, uniformly heating the molten zinc. The heat-conducting pipe 10 is evenly distributed around the wall of the zinc pot body 1 and is made of silicon carbide, which has a high thermal conductivity and can effectively transfer the heat energy of the high-temperature flue gas to the zinc pot body 1. Compared with the original bottom heating, it can effectively reduce zinc dross and improve the galvanizing quality. At the same time, the high-temperature flue gas generated by the burner 2 directly heats the molten zinc through the interior of the heat-conducting pipe 10 without contacting the zinc pot body 1, so there is no problem of poor thermal conductivity and low thermal efficiency of the zinc pot body 1 material.

[0037] Combustion air blower 4 delivers combustion air to air heat exchanger 3. In air heat exchanger 3, the combustion air exchanges heat with exhaust gas exiting heat pipe 10. After the exhaust gas cools down, air heat exchanger 3 heats the air supplied by combustion air blower 4 to 250°C. The heated combustion air then enters the first pipe 8 and then passes through several inlet pipes to each burner 2 for combustion. The combustion air, after passing through air heat exchanger 3, is heated from room temperature to 250°C, which helps reduce fuel consumption and achieves fuel saving. A first regulating valve 5 is installed at the outlet of combustion air blower 4 to automatically adjust the amount of combustion air delivered.

[0038] The 500°C flue gas inside the heat pipe 10 is cooled by the air heat exchanger 3 and then extracted by the induced draft fan 6 through the exhaust gas outlet of the air heat exchanger 3 before entering the next unit. The outlets of several heat pipes 10 are connected to exhaust pipes, and the outlets of several exhaust pipes are connected to a second pipe 9. The second pipe 9 is used to collect the exhaust gas and discharge it to the air heat exchanger 3 for heat exchange treatment. The outlet of the exhaust pipe is equipped with a second regulating valve 7, which can adjust the exhaust gas discharge rate to ensure uniform temperature of the zinc pot body 1.

[0039] The zinc pot body 1 is composed of refractory ceramic bricks, which provides a stable container environment for heating the zinc liquid and ensures the smooth progress of the heating process.

[0040] In summary, by evenly distributing heat pipes 10 around the walls of the zinc pot body 1, the zinc liquid is heated uniformly through direct heating from inside the zinc pot body 1. Compared to the original bottom heating, this method effectively reduces zinc dross. The high-temperature flue gas generated by the burner 2 directly heats the zinc liquid through the heat pipes 10 without contacting the zinc pot body 1, thus eliminating the problem of low thermal efficiency due to poor thermal conductivity of the zinc pot body 1 material. This saves users investment. The combustion fan 4 delivers combustion air to the air heat exchanger 3, where the combustion air exchanges heat with the exhaust gas from the heat pipes 10, which helps reduce fuel consumption and achieves fuel saving. This improves energy utilization, reduces energy consumption, and consequently reduces pollutant emissions, meeting environmental protection requirements.

[0041] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A gas-fired internal heating device for a ceramic zinc pot, comprising a zinc pot body (1), characterized in that, Several sets of heat-conducting pipes (10) are fixedly embedded around the inner wall of the zinc pot body (1). The heat-conducting pipes (10) are used to heat the zinc liquid inside the zinc pot body (1). Each heat pipe (10) in the group has an outlet pipe connected to its outlet end, and a second regulating valve (7) is installed at the outlet end of the outlet pipe. Each heat pipe (10) has an air inlet pipe connected to its air inlet end, and a burner (2) is installed at the air inlet end of the air inlet pipe. The air inlet ends of several of the air inlet pipes are connected to a first pipe (8), and the air inlet ends of the first pipe (8) are connected to an air heat exchanger (3), which is used to heat the combustion air entering the inside of the heat-conducting pipe (10). The outlet ends of several of the air outlet pipes are connected to a second pipe (9), the inlet end of the air heat exchanger (3) is connected to a combustion fan (4), and a first regulating valve (5) is installed at the outlet of the combustion fan (4). The first regulating valve (5) is used to automatically adjust the consumption of combustion air according to the load required by the zinc pot body (1).

2. The gas-fired internal heating device for a ceramic zinc pot according to claim 1, characterized in that, An induced draft fan (6) is provided on one side of the air heat exchanger (3), and the low-temperature exhaust gas outlet of the air heat exchanger (3) is connected to the air inlet of the induced draft fan (6).

3. The gas-fired internal heating device for a ceramic zinc pot according to claim 2, characterized in that, The zinc pot body (1) is composed of refractory ceramic bricks.

4. The gas-fired internal heating device for a ceramic zinc pot according to claim 1, characterized in that, The outer diameter of the heat pipe (10) is 135 mm to 145 mm, and the wall thickness of the heat pipe (10) is 6 mm to 10 mm.

5. The gas-fired internal heating device for a ceramic zinc pot according to claim 1, characterized in that, The first pipe (8) is used to heat the combustion air and introduce it into the burner (2) to participate in combustion, and the second pipe (9) is used to cool the exhaust gas and discharge it.

6. The gas-fired internal heating device for a ceramic zinc pot according to claim 1, characterized in that, The combustion-supporting blower (4) is used to transport combustion-supporting air to the air heat exchanger (3) for heat exchange with the exhaust gas.

7. The gas-fired internal heating device for a ceramic zinc pot according to claim 1, characterized in that, The heat pipe (10) is made of silicon carbide.

8. The gas-fired internal heating device for a ceramic zinc pot according to claim 7, characterized in that, Each heat pipe (10) has a connecting frame (11) fixed on the inner wall at both ends. A U-shaped connecting pipe (13) is inserted into the inner side of the adjacent connecting frame (11). The space between the connecting frame (11) and the U-shaped connecting pipe (13) is sealed with casting material (12).

Images