Energy-saving ceramic kiln with waste heat recovery function

Abstract

The utility model discloses an energy -conserving ceramic kiln with afterheat recovery function, including the casing, the smoke inlet pipe, the smoke exhaust pipe, the water inlet pipe, the heat exchange pipe and the drain pipe, the heat exchange pipe is the snakelike spiral structure, still includes the umbrella -like heat exchange block. Advantageous effect: the utility model innovatively combines umbrella -like heat exchange block and snakelike spiral heat exchange pipe, forms double high -efficient heat exchange structure, one side umbrella -like heat exchange block's radial umbrella surface greatly increased the contact area with flue gas, compared with traditional smooth heat exchange pipe, the contact area is significantly promoted, makes the heat in flue gas can more fast, more fully transfer to heat exchange structure, on the other hand, the coiling structure of snakelike spiral heat exchange pipe has prolonged the flow path of flue gas in the casing, and flue gas residence time is greatly extended, and flue gas has more sufficient time to release heat, and under the double action, afterheat recovery rate is improved, and the hot water after heating can be used in raw material preheating in ceramic production, workshop heating or staff life water.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology in kilns, specifically to an energy-saving ceramic kiln with waste heat recovery function. Background Technology

[0002] Ceramic kilns are the core equipment in the ceramic production process. They need to maintain a high-temperature environment of 1200-1600℃ when firing ceramic products. During the firing process, a large amount of high-temperature flue gas with a temperature of 300-600℃ is generated. If this flue gas is directly discharged, it will not only cause a lot of heat energy to be wasted, but also cause the ambient temperature to rise and aggravate thermal pollution. Existing devices mostly use straight tubes or simple coiled tubes as heat exchange elements. The outer wall of the heat exchange tube is a smooth cylindrical surface, resulting in a small contact area with the flue gas. This leads to low heat transfer efficiency per unit time, and some high-temperature flue gas is discharged without sufficient heat exchange, resulting in incomplete waste heat recovery. The design of straight tubes or short-path coiled tubes makes the flow path of flue gas in the heat exchange box short and the residence time short. The contact time between the flue gas and the heat exchange structure is insufficient, which cannot fully release heat and further reduces the waste heat recovery efficiency. In view of the shortcomings of the existing technology, there is an urgent need to design an energy-saving ceramic kiln that can increase the heat exchange contact area and extend the flue gas residence time, so as to improve the waste heat recovery efficiency and reduce the energy consumption and environmental pressure of ceramic production. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an energy-saving ceramic kiln with waste heat recovery function, which has the advantages of large heat exchange contact area and extended flue gas residence time, thereby solving the problems mentioned in the background technology.

[0004] (II) Technical Solution To achieve the advantages of large heat exchange contact area and extended flue gas residence time, the specific technical solution adopted by this utility model is as follows: an energy-saving ceramic kiln with waste heat recovery function, including a shell, a flue gas inlet pipe, a flue gas outlet pipe, a water inlet pipe, a heat exchange pipe and a drain pipe, wherein the heat exchange pipe has a serpentine spiral structure and also includes an umbrella-shaped heat exchange block.

[0005] The smoke inlet pipe is fixedly inserted through one side of the housing and communicates with the inside of the housing, and the smoke outlet pipe is fixedly inserted through the other side of the housing and communicates with the inside of the housing.

[0006] The serpentine spiral heat exchange tube is coiled inside the shell. The water inlet pipe is fixedly inserted through the top of the shell and sealed to the water inlet end of the serpentine spiral heat exchange tube. The water outlet pipe is fixedly inserted through the bottom of the shell and sealed to the water outlet end of the serpentine spiral heat exchange tube.

[0007] Multiple umbrella-shaped heat exchange blocks are provided and are evenly spaced and fixed on the outer wall of the serpentine spiral heat exchange tube. The umbrella surface of the umbrella-shaped heat exchange block extends outward in a radial pattern. The umbrella-shaped heat exchange block is fixed to the outer wall of the serpentine spiral heat exchange tube by welding. The diameter of the serpentine spiral heat exchange tube is smaller than the diameter of the umbrella-shaped heat exchange block.

[0008] (III) Beneficial Effects Compared with the prior art, this utility model provides an energy-saving ceramic kiln with waste heat recovery function, which has the following beneficial effects: (1) This utility model innovatively combines the umbrella-shaped heat exchange block with the serpentine spiral heat exchange tube to form a dual high-efficiency heat exchange structure. On the one hand, the radial umbrella surface of the umbrella-shaped heat exchange block greatly increases the contact area with the flue gas. Compared with the traditional smooth heat exchange tube, the contact area is significantly improved, so that the heat in the flue gas can be transferred to the heat exchange structure more quickly and fully. On the other hand, the coiled structure of the serpentine spiral heat exchange tube extends the flow path of the flue gas in the shell, and the flue gas residence time is greatly extended. The flue gas has more time to release heat. Under the dual effect, the waste heat recovery rate is improved. The heated water can be used for raw material preheating, workshop heating or employee domestic water in ceramic production, which greatly reduces the overall energy consumption of ceramic production. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of an energy-saving ceramic kiln with waste heat recovery function according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the external structure of an energy-saving ceramic kiln with waste heat recovery function according to an embodiment of the present utility model; Figure 3 yes Figure 1 A partial structural diagram; Figure 4 yes Figure 3 An enlarged diagram of A in the diagram.

[0011] In the picture: 1. Shell; 2. Smoke inlet pipe; 3. Smoke outlet pipe; 4. Water inlet pipe; 5. Heat exchanger pipe; 6. Drain pipe; 7. Umbrella-shaped heat exchange block. Detailed Implementation

[0012] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0013] According to an embodiment of the present invention, an energy-saving ceramic kiln with waste heat recovery function is provided.

[0014] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, an energy-saving ceramic kiln with waste heat recovery function according to an embodiment of the present utility model includes a shell 1, a flue gas inlet pipe 2, a flue gas outlet pipe 3, a water inlet pipe 4, a heat exchange pipe 5, and a drain pipe 6. The heat exchange pipe 5 has a serpentine spiral structure and also includes an umbrella-shaped heat exchange block 7. The shell 1 is the external load-bearing structure of the entire device, providing installation and working space for the internal heat exchange components; the flue gas inlet pipe 2 is the channel through which the high-temperature flue gas generated by the ceramic kiln enters the device; the exhaust pipe 3 is used to discharge the flue gas after heat exchange; the water inlet pipe 4 is responsible for supplying cold water to the heat exchange components; the heat exchange tube 5 adopts a serpentine spiral structure, which can extend the residence time of flue gas compared with traditional straight pipes and is a key channel for heat exchange; the drain pipe 6 is used to discharge the hot water after heat exchange; and the umbrella-shaped heat exchange block 7 is a component that helps to improve heat exchange efficiency and can increase the contact area with the flue gas. Please refer to Figures 1 and 2. The smoke inlet pipe 2 is fixedly inserted through one side surface of the housing 1 and communicates with the inside of the housing 1. The smoke outlet pipe 3 is fixedly inserted through the other side surface of the housing 1 and communicates with the inside of the housing 1.

[0015] The inlet pipe 2 is fixed and penetrates one side surface of the shell 1. This design ensures that the high-temperature flue gas generated by the ceramic kiln enters the interior of the shell 1 stably without leakage. The exhaust pipe 3 is fixed and penetrates the other side surface of the shell 1 and communicates with the interior of the shell 1. It provides an exhaust path for the flue gas after heat exchange, so that the flue gas can be smoothly discharged after completing the heat exchange process in the shell, forming a complete flue gas circulation loop. Please refer to Figures 1, 2, and 3. The serpentine spiral heat exchange tube 5 is coiled inside the shell 1. The water inlet pipe 4 is fixedly inserted through the top of the shell 1 and sealed to the water inlet end of the serpentine spiral heat exchange tube 5. The drain pipe 6 is fixedly inserted through the bottom of the shell 1 and sealed to the water outlet end of the serpentine spiral heat exchange tube 5. The installation configuration of the serpentine spiral heat exchange tube 5 inside the shell 1 can be seen. Its coiled arrangement makes full use of the internal space of the shell 1 and extends the flow path of the flue gas within the shell 1. The water inlet pipe 4 is fixedly connected to the water inlet end of the serpentine spiral heat exchange tube 5 after passing through the top of the shell 1. The sealing design prevents cold water from leaking during transportation and ensures that all cold water can enter the heat exchange tube 5 to participate in heat exchange. The drain pipe 6 is fixedly connected to the bottom of the shell 1 and sealed to the water outlet end of the serpentine spiral heat exchange tube 5. This is also for sealing purposes, and it also facilitates the timely discharge of hot water after heat exchange, realizing continuous input of cold water and continuous output of hot water, and ensuring the continuity of the heat exchange process. Please refer to Figures 1, 3 and 4. Multiple umbrella-shaped heat exchange blocks 7 are provided and are evenly spaced and fixed on the outer wall of the serpentine spiral heat exchange tube 5. The umbrella surface of the umbrella-shaped heat exchange block 7 extends outward in a radial pattern.

[0016] The distribution of multiple umbrella-shaped heat exchange blocks 7 on the outer wall of the serpentine spiral heat exchange tube 5 is clearly visible. The design of multiple blocks at uniform intervals allows the contact area between the serpentine spiral heat exchange tube 5 and the flue gas to be increased at different positions through the umbrella-shaped heat exchange blocks 7, avoiding insufficient local heat exchange. The radially extending structure of the umbrella surface maximizes the contact range with the flue gas, allowing the high-temperature flue gas to come into more complete contact with the heat exchange components, thereby improving heat transfer efficiency. Please refer to Figures 1, 3 and 4. The umbrella-shaped heat exchange block 7 is fixed to the outer wall of the serpentine spiral heat exchange tube 5 by welding.

[0017] The welding method ensures that the umbrella-shaped heat exchange block 7 is firmly connected to the outer wall of the serpentine spiral heat exchange tube 5. During long-term use, even if it is subjected to the impact of high-temperature flue gas, it will not loosen or fall off, thus ensuring the stability of the heat exchange process. At the same time, the welding connection also facilitates the rapid transfer of heat from the umbrella-shaped heat exchange block 7 to the cold water inside the serpentine spiral heat exchange tube 5, reducing heat loss. Please refer to Figures 1, 3, and 4. The diameter of the serpentine spiral heat exchange tube 5 is smaller than the diameter of the umbrella-shaped heat exchange block 7. The diameter of the serpentine spiral heat exchange tube 5 is smaller than that of the umbrella-shaped heat exchange block 7, which allows the umbrella-shaped heat exchange block 7 to be more fully exposed to the high-temperature flue gas, further expanding the contact area with the flue gas. This avoids the umbrella-shaped heat exchange block 7 being blocked due to the excessively large diameter of the heat exchange tube 5, ensuring that the umbrella-shaped heat exchange block 7 can effectively play its role in increasing the contact area and improving the heat exchange efficiency.

[0018] Working Principle: High-temperature flue gas generated by the ceramic kiln enters the shell 1 through the flue gas inlet pipe 2. Simultaneously, cold water is transported to the serpentine spiral heat exchange tube 5 through the water inlet pipe 4. Due to the coiled structure of the serpentine spiral heat exchange tube 5, the flow path of the high-temperature flue gas entering the shell 1 is extended, and the residence time is significantly increased. During this process, the high-temperature flue gas comes into full contact with the outer wall of the serpentine spiral heat exchange tube 5 and the umbrella-shaped heat exchange blocks 7 evenly distributed on the outer wall, which extend outward in a radial pattern. The umbrella-shaped heat exchange blocks 7 increase the contact area with the flue gas, allowing the heat in the flue gas to be transferred to the cold water in the serpentine spiral heat exchange tube 5 more quickly and fully. After absorbing heat, the cold water temperature rises, and the resulting hot water is discharged through the drain pipe 6, which is sealed to the outlet end of the serpentine spiral heat exchange tube 5. This hot water can be used for preheating raw materials in ceramic production, workshop heating, or domestic water for employees. The flue gas that has completed heat transfer and cooled down then exits through the exhaust pipe 3. By discharging the waste heat from the kiln shell 1, efficient recovery and utilization of waste heat from the kiln are achieved, while reducing thermal pollution and energy waste caused by direct emission of high-temperature flue gas.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving ceramic kiln with waste heat recovery function, comprising a shell (1), a flue gas inlet pipe (2), a flue gas outlet pipe (3), a water inlet pipe (4), a heat exchange pipe (5), and a drain pipe (6), characterized in that, The heat exchange tube (5) has a serpentine spiral structure and also includes an umbrella-shaped heat exchange block (7).

2. The energy-saving ceramic kiln with waste heat recovery function according to claim 1, characterized in that, The inlet pipe (2) is fixedly inserted through one side surface of the housing (1) and communicates with the inside of the housing (1), and the exhaust pipe (3) is fixedly inserted through the other side surface of the housing (1) and communicates with the inside of the housing (1).

3. An energy-saving ceramic kiln with waste heat recovery function according to claim 1, characterized in that, The serpentine spiral heat exchange tube (5) is coiled inside the shell (1). The water inlet pipe (4) is fixedly inserted through the top of the shell (1) and sealed to the water inlet end of the serpentine spiral heat exchange tube (5). The drain pipe (6) is fixedly inserted through the bottom of the shell (1) and sealed to the water outlet end of the serpentine spiral heat exchange tube (5).

4. An energy-saving ceramic kiln with waste heat recovery function according to claim 1, characterized in that, Multiple umbrella-shaped heat exchange blocks (7) are provided and are evenly spaced and fixed on the outer wall of the serpentine spiral heat exchange tube (5). The umbrella surface of the umbrella-shaped heat exchange block (7) extends outward in a radial pattern.

5. An energy-saving ceramic kiln with waste heat recovery function according to claim 1, characterized in that, The umbrella-shaped heat exchange block (7) is fixed to the outer wall of the serpentine spiral heat exchange tube (5) by welding.

6. An energy-saving ceramic kiln with waste heat recovery function according to claim 1, characterized in that, The diameter of the serpentine spiral heat exchange tube (5) is smaller than the diameter of the umbrella-shaped heat exchange block (7).

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