Heat recovery device of glass kiln
By setting up an air hole structure and a hot air recovery hood in the heat storage chamber of the glass kiln, combined with secondary air ducts and an intelligent control system, the problem of high energy consumption of the glass kiln was solved, and energy consumption was reduced and production efficiency was improved.
Patent Information
- Application Number
- CN202422488660.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-15
AI Technical Summary
Existing glass kilns have high energy consumption and serious heat loss, which leads to increased production costs, and there is also the problem of unreasonable design of heat recovery devices.
An air hole structure and a hot air recovery hood are set in the regenerator of the glass kiln. The high-temperature air is recovered through the secondary air duct and sent back into the regenerator for secondary heating. Combined with independent temperature control areas and intelligent control systems, the design of the regenerator is optimized to reduce energy consumption.
The hot air recovery device reduces the kiln energy consumption by 1%-2%, improves production efficiency, reduces heat loss, reduces the creep risk of the heat storage chamber, and improves combustion efficiency.
Smart Images
Figure CN223345950U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to glass production equipment, in particular to a heat recovery device for a glass kiln. Background Art
[0002] During the life cycle of a kiln, energy consumption accounts for more than 75% of the total energy consumption of the entire production line. With the improvement of people's awareness of environmental protection, alleviating energy shortages, controlling air pollution, and improving the quality of life have become a consensus. In addition, competition in the global glass industry continues to intensify, and the requirements for the economic performance of kilns are getting higher and higher. How to reduce the unit energy consumption of glass kilns has always been a problem that the industry continues to tackle. Utility Model Content
[0003] The technical problem to be solved by the present invention is to provide a glass furnace heat recovery device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.
[0004] The solution of the utility model to solve the technical problem is: a heat recovery device for a glass kiln, including a heat storage chamber, the heat storage chamber including a middle wall, an air hole structure is provided on the middle wall, and the outlet of the air hole structure is located at the top of the heat storage chamber; a hot air recovery hood is provided above the heat storage chamber, the hot air recovery hood faces the air hole structure, and the hot air recovery hood is connected to the secondary fan through a secondary air duct.
[0005] The beneficial effect of the utility model is that the utility model sets an air hole structure at the middle wall position of the heat storage chamber, so that the temperature of the hot air coming out of the air hole can reach 400-600℃, and the hot air is recovered by the hot air recovery cover and re-sent into the heat storage chamber by secondary air. Compared with the secondary air at room temperature, the secondary air enters the heat storage chamber and is heated again by the grid body, so the energy consumption of the kiln can be reduced by 1%-2%, thereby improving the economic benefits.
[0006] As a further improvement to the above technical solution, the secondary air duct includes an air inlet duct, an air outlet duct, and a recovery duct. The air inlet duct and the recovery duct are connected, with one end of the air inlet duct connected to the secondary fan and the other end connected to the recovery duct, and one end of the recovery duct connected to the hot air recovery hood. The air outlet duct is connected to the secondary fan at one end and to the heat exchanger in the heat storage chamber at the other end. The hot air is recovered by the recovery duct, then passes through the air inlet duct and then enters the heat storage chamber through the air outlet duct. The closed pipeline can reduce heat loss.
[0007] As a further improvement to the above technical solution, the recovery pipe is provided with a first gate valve, the air inlet pipe includes an air inlet, and the air inlet is provided with a second gate valve. The first and second gate valves, along with the air inlet, allow the type of air intake to be selected. For example, when the first gate valve is closed and the second gate valve is open, only room-temperature air is discharged from the air outlet pipe, meeting different production requirements.
[0008] As a further improvement to the above technical solution, the regenerator includes a first area and a second area, both of which are equipped with the heat exchanger, and the middle wall is located between the first and second areas. The middle wall divides the regenerator into two parts, and the two parts can be used independently to meet production needs.
[0009] As a further improvement to the above technical solution, the first area includes a first air inlet, and the second area includes a second air inlet, and both the first air inlet and the second air inlet are connected to the air outlet duct. Since the first area and the second area are used independently, both areas need to be connected to the air outlet duct to meet the requirement of secondary air in both areas.
[0010] As a further improvement of the above technical solution, a third gate valve is provided at the first air inlet, and a fourth gate valve is provided at the second air inlet.
[0011] As a further improvement of the above technical solution, there are two secondary fans, and the air inlets of the two secondary fans are both connected to the air inlet pipe. The provision of two secondary fans can meet the requirements of large air volume and independent control.
[0012] As a further improvement of the above technical solution, a fifth gate valve is provided at the air outlet of the secondary air fan.
[0013] As a further improvement of the above technical solution, a flow meter is provided in the air inlet pipe.
[0014] As a further improvement to the above technical solution, a first temperature sensor is provided in the air inlet duct, a second temperature sensor is provided in the hot air recovery hood, and the flow meter, the first temperature sensor, the second temperature sensor, and the secondary air blower are electrically connected via a controller. The flow meter, temperature sensors, and gate valve enable intelligent control of air volume, improving combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief description of the drawings required for describing the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of them. Those skilled in the art can also derive other design solutions and drawings based on these drawings without inventive effort.
[0016] Figure 1 This is a front view of the heat recovery device of the utility model;
[0017] Figure 2 It is a top view of the heat recovery device of the present utility model.
[0018] Reference numerals:
[0019] Regenerator 100, first area 110, second area 120, middle wall 200, hot air recovery hood 300, secondary air duct 400, air inlet duct 410, air inlet 411, air outlet duct 420, recovery duct 430, secondary air blower 500, first gate valve 610, second gate valve 620, third gate valve 630, fourth gate valve 640, fifth gate valve 650, flow meter 700 DETAILED DESCRIPTION
[0020] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are within the scope of protection of the present invention. The preferred embodiments of the present invention are shown in the drawings. The purpose of the drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.
[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0022] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.
[0023] In the description of this utility model, unless otherwise expressly defined, terms such as "install," "connect," and "set" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meanings of these terms in this utility model based on the specific content of the technical solution. Furthermore, the various technical features of this invention may be combined interchangeably as long as they do not conflict with each other.
[0024] The function of a glass kiln is to melt, homogenize, and clarify glass raw materials at high temperatures in the furnace to form glass liquid that meets the requirements. In the production process of glass products, the glass kiln is mainly responsible for providing glass liquid with good melting quality, stable temperature, and uniform composition for subsequent processes. While improving the clarification quality and ensuring stable product quality, it is also particularly important to improve the energy conservation and environmental protection effects of the kiln. The main energy-consuming part of a glass factory is the glass kiln, which accounts for more than 75% of the total energy consumption. In recent years, most glass industry companies have taken many energy-saving measures in terms of glass material, feeding system, combustion system, kiln structure, kiln insulation, waste heat utilization, and operation control, and have achieved certain results. However, as the industry's main energy-consuming equipment, glass kilns in China generally have problems such as small scale, incomplete fuel combustion, high energy consumption, inadequate quality of kiln insulation materials, and severe heat loss. Glass furnaces are typically equipped with primary and secondary air systems. The primary air is primarily used to transport fuel into the boiler and provide oxygen for combustion reactions within the boiler. The secondary air is primarily used to disrupt the airflow within the boiler, allowing for a more complete gas reaction and more even heat distribution. It also assists in providing some of the oxygen required for combustion when the primary air supply is insufficient. To ensure quality, the secondary air must be fed at a certain temperature, otherwise it will affect the quality of glass production. In existing technologies, the secondary air is typically preheated using an additional heating device before being fed into the regenerator, increasing the energy consumption of the glass furnace.
[0025] In glass kilns, regenerators are usually used as heat recovery devices for the kiln. There are two regenerators on each side. One side exhausts the flue gas, and the other side mixes the secondary air with the kiln fuel for combustion. During the exhaust process, the regenerator absorbs the waste heat of the flue gas to heat the lattice. On the other side, the secondary air passes through the regenerator, and the lattice heats the secondary air. The heated secondary air enters the combustion space and burns with the fuel. The energy loss of the entire kiln exceeds 30%, most of which is lost through the kiln body and carried away by the flue gas. How to collect the lost heat for recycling? This patent collects the heat lost at the top of the regenerator and heats the air for secondary use, which plays an energy-saving role. This patent uses a heat recovery device to transport high-temperature air to the regenerator through a recovery pipeline at the top of the regenerator. The secondary air entering the regenerator is the high-temperature hot air from the top, and then passes through the regenerator for secondary heating. Finally, the secondary air (which has a higher temperature than the secondary air heated once) is burned with the fuel, which plays an energy-saving role. [1]
[0026] Specifically, refer to Figures 1 and 2 The glass furnace includes a regenerator 100, which includes a center wall 200. The center wall 200 divides the regenerator 100 into a first area 110 and a second area 120. Typically, the first and second areas 110 and 120 are independently temperature-controlled. During use, because the center of the regenerator is the hottest, when the actual wall temperature reaches the refractoriness temperature under load and the creep temperature of the refractory material, the refractory material creeps and shrinks. Consequently, the temperature in the center of the center wall 200 is also high, resulting in the most severe creep shrinkage. The temperatures on the sides are relatively low, causing different creep shrinkage within the same section of the wall, leading to downward collapse and bending. If the temperature difference is allowed to persist, as the center wall 200 collapses and deforms, the different shrinkage between the center and the sides, coupled with the different temperatures at the top and bottom, will cause different amounts of collapse. This can lead to risks such as wall cracking and fire leakage in the regenerator. To this end, the present invention optimizes the middle wall 200 within the regenerator 100 by providing a vent structure on the middle wall 200. This vent structure primarily dissipates heat, dissipating it upward through the vent structure. This vent structure significantly improves the heat distribution of the middle wall 200, reduces wall creep, and mitigates the risk of fire leakage within the regenerator.
[0027] The temperature of the hot air discharged from the air hole structure can generally reach 400-500°C. If this part of the energy is recovered, it can reduce the energy consumption of the kiln. Therefore, in the present invention, a hot air recovery hood 300 is set on the top of the heat storage chamber 100, and the hot air recovery hood 300 is just facing the air hole structure, and the hot air recovery hood 300 is connected to the secondary fan 500 through the secondary air duct 400. The hot air recovery hood 300 collects the high-temperature air discharged from the air hole structure, and then connects it to the existing secondary air system through the secondary air duct 400, and uses this part of the hot air to heat the secondary air. Compared with the prior art, which directly introduces the secondary air system at room temperature, the heat recovery device of this solution can reduce the energy consumption of the kiln by 1%-2%, which greatly improves the production efficiency of the enterprise.
[0028] At the same time, since the heat storage chamber of the glass kiln in this solution is divided into two independent temperature control areas, each area is equipped with a heat exchanger, the heat storage chambers of the two areas can be used separately to meet production needs.
[0029] See also Figure 1 The secondary air duct 400 mainly includes an air inlet duct 410, an air outlet duct 420, and a recovery duct 430. The air inlet duct 410 is connected to the air inlet end of the secondary fan 500, while the air outlet duct 420 is connected to the air outlet end of the secondary fan 500. The other end of the air outlet duct 420 is also connected to the heat storage chamber 100. The upper end of the recovery duct 430 is connected to the hot air recovery hood 300, and the lower end is connected to the air inlet duct 410. It is understood that the air inlet duct 410, air outlet duct 420, and secondary fan 500 are generally installed on the ground. Since the heat storage chamber 100 is generally 2-3 stories high, the installation height of the hot air recovery hood 300 is also relatively high. Therefore, the recovery duct 430 is generally arranged in an upward and downward direction. In addition, the air inlet duct 410 also includes an air inlet 411, which is used to communicate with the outside air. That is, the air inlet pipe 410 includes at least three openings, one is an interface connected to the secondary fan 500, one is an interface connected to the recovery pipe 430, and the other is an interface connected to the air. The air inlet 411 is relatively close to the interface connected to the recovery pipe 430. At the same time, a first gate valve 610 is provided at the lower end of the recovery pipe 430 near the air inlet pipe 410, and a second gate valve 620 is provided on the air inlet. The first gate valve 610 plays a role in opening and closing the air inlet pipe 410 and the recovery pipe 430, while the second gate valve 620 plays a role in opening and closing the air inlet pipe 410 and the outside air.
[0030] In glass production, the type of secondary air intake can be selected using the first gate valve 610 and the second gate valve 620. For example, when the first gate valve 610 is opened and the second gate valve 620 is closed, the air outlet duct 420 sends out all the hot air collected from the hot air recovery hood 300; when the first gate valve is closed and the second gate valve is opened, the air outlet duct 420 sends out only air at room temperature, which meets different production needs.
[0031] As previously mentioned, since the regenerator 100 is divided into two independent temperature-controlled zones, each zone requires independent secondary air supply. Therefore, the first zone 110 includes a first air inlet, and the second zone 120 includes a second air inlet. Both the first and second air inlets are connected to the outlet pipe 420. Furthermore, a third gate valve 630 is provided at the first air inlet, and a fourth gate valve 640 is provided at the second air inlet. The third and fourth gate valves 630 and 640 are opened and closed according to actual production conditions.
[0032] As a further preferred embodiment, there are two secondary fans 500, and the air inlets of the two secondary fans 500 are both connected to the air inlet pipe 410. The provision of two secondary fans can meet the requirements of large air volume and independent control.
[0033] As a further preferred embodiment, a fifth gate valve 650 is provided at the air outlet of the secondary air fan 500 .
[0034] As a further preferred embodiment, a flow meter 700 is provided in the air inlet duct 410. A first temperature sensor is provided in the air inlet duct 410, and a second temperature sensor is provided in the hot air recovery hood 300. The flow meter 700, the first temperature sensor, the second temperature sensor, and the secondary air blower are electrically connected via a controller. The flow meter, temperature sensor, and gate valve enable intelligent control of air volume, improving combustion efficiency.
[0035] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A heat recovery device for a glass furnace, characterized by: The heat storage chamber includes a middle wall, an air hole structure is provided on the middle wall, and an outlet of the air hole structure is located at the top of the heat storage chamber; a hot air recovery hood is provided above the heat storage chamber, the hot air recovery hood faces the air hole structure, and the hot air recovery hood is connected to the secondary air fan through a secondary air duct; the secondary air duct includes an air inlet duct, an air outlet duct, and a recovery duct, the air inlet duct and the recovery duct are connected, one end of the air inlet duct is connected to the secondary air fan, and the other end is connected to the recovery duct, and one end of the recovery duct is connected to the hot air recovery hood; one end of the air outlet duct is connected to the secondary air fan, and the other end is connected to the heat exchanger in the heat storage chamber; a first gate valve is provided in the recovery duct, the air inlet duct includes an air inlet, and a second gate valve is provided on the air inlet; the heat storage chamber includes a first area and a second area, the first area and the second area are both provided with the heat exchanger, and the middle wall is located between the first area and the second area.
2. The heat recovery device for a glass furnace according to claim 1, characterized in that: The first area includes a first air inlet, and the second area includes a second air inlet. Both the first air inlet and the second air inlet are connected to the air outlet pipe.
3. The heat recovery device for a glass furnace according to claim 2, characterized in that: A third gate valve is provided at the first air inlet, and a fourth gate valve is provided at the second air inlet.
4. The heat recovery device for a glass furnace according to claim 3, characterized in that: There are two secondary fans, and the air inlets of the two secondary fans are both connected to the air inlet pipe.
5. The heat recovery device for a glass furnace according to claim 4, characterized in that: A fifth gate valve is provided at the air outlet of the secondary air fan.
6. The heat recovery device for a glass furnace according to claim 1, characterized in that: A flow meter is provided in the air inlet pipe.
7. The heat recovery device for a glass furnace according to claim 6, characterized in that: A first temperature sensor is provided in the air inlet pipe, a second temperature sensor is provided in the hot air recovery cover, and the flow meter, the first temperature sensor, the second temperature sensor and the secondary air fan are electrically connected through a controller.