Kiln waste heat recovery water circulation mechanism

Abstract

The utility model belongs to the technical field of kiln waste heat recovery, and specifically relates to a kiln waste heat recovery water circulation mechanism, including a hollow kiln body, on which a water heat recovery module is arranged, and the water heat recovery module includes a plurality of circulating water pipes arranged side by side, and the front and rear ends of the circulating water pipes are respectively provided with a water inlet and a drain outlet. The utility model arranges circulating water pipes arranged side by side on the kiln body and the flow direction in the circulating water pipes is fixed, so that it is convenient to install a corresponding number of circulating water pipes on the basis of the original kiln as needed, and the water flowing side by side in the circulating water pipes has little effect on the temperature fluctuation in the kiln during heat exchange, and will not affect the firing quality of the product, which has significant practical significance.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln waste heat recovery, and in particular to a kiln waste heat recovery water circulation mechanism. Background Art

[0002] Kilns are equipment made of refractory materials for firing ceramics and other products. They are essential facilities in pottery molding. Human beings have a history of ceramic firing for tens of thousands of years, and have accumulated a wealth of kiln-making styles and experience. From the open-air pile firing and pit-building firing in primitive society to the steamed bun-shaped rising flame round kiln, semi-down flame horseshoe kiln, half-slope dragon kiln, duck egg-shaped kiln, and now indoor gas kiln and electric kiln, kiln technology is constantly improving and developing. The internal heating temperature of the kiln is generally more than one thousand degrees. The exhaust flue gas and the fired products will release a large amount of unusable waste heat to the outside world when cooling, resulting in a waste of heat resources and exacerbating the problem of rising temperatures. Therefore, how to recover the excess heat generated during the operation of the kiln is a key research and development theme in the industry.

[0003] For example, in the patent document with the patent number CN202122096701.8 and the name "A device for recovering waste heat from a kiln for ceramic production", the disclosed equipment includes a rectangular kiln, the top of which is fixedly connected to the bottom of a water-boiling tank, the top of which is connected to one end of a long water-conducting pipe, the other end of which is connected to the top of a water pump, one side of which is fixedly connected to one side of a cooling water storage tank, the inner side of one end of the cooling water storage tank is fixedly connected to one side of a water-pumping conduit, and one end of which is connected to one side of the water-pumping pump. In the device for recovering waste heat from a kiln for ceramic production, when the waste heat of the rectangular kiln boils the water in the water-boiling tank to generate water vapor, the water vapor passes through the steam outlet pipe in the cooling water storage tank and is discharged from the branch duct, achieving the effect of condensing into distilled water after being condensed by cold water, thereby recovering the excess heat generated by the kiln.

[0004] However, the water-boiling tank of the above scheme is directly arranged on the top of the kiln, the operating temperature is relatively high and it is easy to cause temperature fluctuations in the kiln, affecting the normal production of ceramic products; on the other hand, the design of high-temperature water boiling is prone to scale generation, leading to pipe blockage; furthermore, this design is difficult to install and use on the basis of the original kiln equipment, and the kiln needs to be replaced as a whole, which has a high cost of use.

[0005] In view of this, it is necessary to develop a waste heat recovery device that can effectively recover the waste heat of the kiln and has little impact on the temperature fluctuation in the kiln, which is easy to install on the original kiln equipment and will not affect the firing quality of the product. Utility Model Content

[0006] In order to solve the problem that the general kiln waste heat recovery equipment on the market has a great impact on the temperature fluctuation in the kiln, and generally requires overall replacement and installation, is difficult to install on the basis of the original kiln equipment, and has high equipment installation costs, a kiln waste heat recovery water circulation mechanism is provided.

[0007] The kiln waste heat recovery water circulation mechanism comprises a hollow kiln body, on which a water heat recovery module is arranged, and the water heat recovery module comprises a plurality of circulating water pipes arranged side by side, and the front and rear ends of the circulating water pipes are respectively provided with a water inlet and a drain outlet.

[0008] Furthermore, the circulating water pipes are all coiled in an S shape.

[0009] Furthermore, a gap under the roller is provided between the kiln body and the circulating water pipe.

[0010] Furthermore, the water inlet is arranged at the rear end of the circulating water pipe, and the water outlet is arranged at the front end of the circulating water pipe.

[0011] Furthermore, the circulating water pipe comprises a seamless steel pipe section, the seamless steel pipe section is arranged on the side of the kiln body, and the water inlet and the drain outlet are arranged on the outside of the kiln body.

[0012] Furthermore, the multiple water inlets are all connected to a water inlet pipe, and the multiple water outlets are all connected to a water outlet pipe.

[0013] Furthermore, one end of the water heat recovery module is tilted downward, the highest point of the water heat recovery module is connected to a pressure relief valve, and the lowest point of the water heat recovery module is connected to a sewage pipe.

[0014] Furthermore, the kiln body is sequentially provided with a preheating zone, a firing zone, a fast cooling zone, and a slow cooling zone, and the water heat recovery module is arranged in the slow cooling zone.

[0015] The advantages of the utility model are:

[0016] 1. The structure is simple and the heat exchange effect is good, which is convenient to install on the basis of the original kiln.

[0017] 2. The number of circulating water pipes can be adjusted according to heat exchange requirements, with strong adaptability.

[0018] 3. The heat exchange medium water in multiple circulating water pipes runs synchronously and maintains a certain distance from the kiln rollers, which has little impact on the temperature fluctuation in the kiln and can avoid the temperature fluctuation in the kiln causing a decrease in product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a top view of the kiln waste heat recovery water circulation mechanism;

[0021] Figure 2 It is a side view of the kiln waste heat recovery water circulation mechanism.

[0022] Figure ID:

[0023] 1. Water heat recovery module; 101. Circulating water pipe; 2. Kiln body; 3. Water inlet; 301. Water inlet pipe; 4. Drain outlet; 401. Water outlet pipe; 5. Gap under roller; 6. Air pressure valve; 7. Drain pipe. DETAILED DESCRIPTION

[0024] In order to solve the problem that the general kiln waste heat recovery equipment on the market has a great impact on the temperature fluctuation in the kiln, and generally requires overall replacement and installation, is difficult to install on the basis of the original kiln equipment, and has high equipment installation costs, a kiln waste heat recovery water circulation mechanism is provided.

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that the terms such as "within", "in" and "a" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of the implementation of the present utility model, and should be stated in advance.

[0027] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood by specific circumstances.

[0028] like Figure 1 and 2 As shown, this embodiment provides a kiln waste heat recovery water circulation mechanism, including a hollow kiln body 2, on which a water heat recovery module 1 is arranged, and the water heat recovery module 1 includes a plurality of circulating water pipes 101 arranged side by side, and the front and rear ends of the circulating water pipes 101 are respectively provided with a water inlet 3 and a drain outlet 4.

[0029] In actual use, when the kiln body 2 is in operation, the excess heat is transferred to the water heat recovery module 1, and the water with a lower temperature in the water heat recovery module 1 is heated and output through the drain port 4 for heating ceramic raw material slurry, domestic hot water or power generation, etc., to avoid heat energy waste. The water with lowered temperature is input into the circulating water pipe 101 from the water inlet 3 through the pipeline for heating. Since multiple circulating water pipes 101 are arranged side by side, the number of circulating water pipes 101 can be set as needed according to the specifications of the kiln body 2 and the specific heat exchange requirements, so as to facilitate the installation of the water heat recovery module 1 on the basis of the kiln body 2 without a heat recovery mechanism. In addition, since multiple water pipes flow side by side, the temperature change in the kiln body 2 is more uniform, and the product quality in the kiln will not fluctuate, causing a decline in quality.

[0030] The circulating water pipes 101 are all coiled in an S shape, and the center lines of the circulating water pipes 101 are arranged in the same plane. The surface area of ​​the circulating water pipes 101 coiled in an S shape is greatly increased, which can ensure the heat exchange effect, and the circulating water pipes 101 with a plane design occupy a small space, which is convenient for layout and installation on the basis of the original kiln equipment.

[0031] The circulating water pipe 101 is arranged under the roller of the kiln body 2, and a gap 5 under the roller is arranged between the kiln body 2 and the circulating water pipe 101. The water heat recovery module 1 arranged at the bottom of the kiln body 2 is convenient for installation and is not easy to block the original structure of the kiln body 2. The gap 5 under the roller prevents the kiln body 2 from directly contacting the circulating water pipe 101, and the heat exchange process is relatively smooth, which can avoid temperature fluctuations in the kiln body 2.

[0032] The water inlet 3 is arranged at the rear end of the circulating water pipe 101, and the drain outlet 4 is arranged at the front end of the circulating water pipe 101. The multi-channel water flows in reverse from the lower temperature area of ​​the kiln body 2 to the higher temperature area simultaneously, which can ensure uniform heat absorption in the kiln, small fluctuation, and little impact on the production of products in the kiln.

[0033] The circulating water pipe 101 includes a seamless steel pipe section, which is arranged on the side of the kiln body 2, and the water inlet 3 and the drain outlet 4 are arranged on the outside of the kiln body 2. The seamless steel pipe section can improve the uniformity of heat transfer and further avoid temperature fluctuations in the kiln body 2.

[0034] The multiple water inlets 3 are all connected to a water inlet pipe 301, and the multiple water outlets 4 are all connected to a water outlet pipe 401. The synchronous inlet and outlet water channels are convenient for setting valves for management.

[0035] One end of the water heat recovery module 1 is tilted downward, and the highest point of the water heat recovery module 1 is connected to a pressure relief valve 6, and the lowest point is connected to a sewage pipe 7. The pressure relief valve 6 can prevent the management pressure from being too large and causing burst damage, and the sewage pipe 7 facilitates the discharge of solid dirt in the pipeline.

[0036] The kiln body 2 is sequentially provided with a preheating zone, a firing zone, a fast cooling zone, and a slow cooling zone, and the water heat recovery module 1 is provided in the slow cooling zone. Since the excess heat in the cooling zone is naturally dissipated, a large amount of waste heat will be generated. Therefore, the heat exchange mechanism is provided in the slow cooling zone to effectively recover the excess heat and avoid the temperature fluctuation in the kiln caused by the heat exchange mechanism, which affects the production quality of ceramic products.

[0037] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation modes. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A kiln waste heat recovery water circulation mechanism, comprising a hollow kiln body, characterized in that: The kiln body is provided with a water heat recovery module, which includes a plurality of circulating water pipes arranged side by side, and the front and rear ends of the circulating water pipes are respectively provided with a water inlet and a water outlet.

2. The kiln waste heat recovery water circulation mechanism according to claim 1 is characterized in that: The circulating water pipes are all coiled in an S shape.

3. The kiln waste heat recovery water circulation mechanism according to claim 2 is characterized in that: A gap under the roller is arranged between the kiln body and the circulating water pipe.

4. The kiln waste heat recovery water circulation mechanism according to claim 1, characterized in that: The water inlet is arranged at the rear end of the circulating water pipe, and the water outlet is arranged at the front end of the circulating water pipe.

5. The kiln waste heat recovery water circulation mechanism according to claim 1, characterized in that: The circulating water pipe comprises a seamless steel pipe section, which is arranged on the side of the kiln body, and the water inlet and the water outlet are arranged on the outside of the kiln body.

6. The kiln waste heat recovery water circulation mechanism according to claim 1, characterized in that: The multiple water inlets are all connected to a water inlet pipe, and the multiple water outlets are all connected to a water outlet pipe.

7. The kiln waste heat recovery water circulation mechanism according to claim 1, characterized in that: One end of the water heat recovery module is tilted downward, the highest point of the water heat recovery module is connected to a pressure relief valve, and the lowest point of the water heat recovery module is connected to a sewage pipe.

8. The kiln waste heat recovery water circulation mechanism according to claim 1, characterized in that: The kiln body is sequentially provided with a preheating zone, a firing zone, a fast cooling zone, and a slow cooling zone, and the water heat recovery module is arranged in the slow cooling zone.

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