Kiln system

Abstract

The utility model discloses a kiln system which comprises a kiln body, a gas supply module and a circulation module, the kiln body is provided with a combustion area, a quenching area and a cooling area, waste gas exhausted from the combustion area sequentially passes through the quenching area and the cooling area, and the cooling area is provided with a smoke outlet; the gas supply module is used for inputting cooling air into the quenching area, and the cooling air is mixed with the waste gas to form flue gas; and the circulating module comprises a heat exchanger, the heat exchanger is arranged in the quenching area, a smoke outlet of the cooling area can be communicated with an air inlet of the heat exchanger and the outside, an air outlet of the heat exchanger is communicated with the combustion area, and the heat exchanger can conduct heat exchange on smoke exhausted by the cooling area, heat rising is conducted on the smoke, and then the smoke is conveyed into the combustion area again. The utility model can improve the heat energy utilization rate of the flue gas.

Description

Technical Field

[0001] This utility model relates to the field of kiln system technology, and in particular to a kiln system. Background Technology

[0002] Currently, in ceramic industrial kiln combustion equipment, the ambient temperature air combustion control system is an essential component of the combustion equipment. It mainly provides heat energy for ceramic firing by drawing ambient temperature air and mixing it with fuel gas for combustion. The exhaust gas generated in the kiln combustion zone mixes with cold air in the cooling zone to form flue gas. The cooled flue gas is then discharged into the outdoor atmosphere, thus making full use of the heat energy of the flue gas. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a kiln system capable of improving the thermal energy utilization rate of flue gas.

[0004] According to an embodiment of the present invention, a kiln system comprises a kiln body, a gas supply module, and a circulation module. The kiln body is provided with a combustion zone, a quenching zone, and a cooling zone. The exhaust gas discharged from the combustion zone passes sequentially through the quenching zone and the cooling zone. The cooling zone has a flue gas outlet. The gas supply module is used to input cold air into the quenching zone, where the cold air mixes with the exhaust gas to form flue gas. The circulation module includes a heat exchanger located in the quenching zone. The flue gas outlet of the cooling zone is connected to the air inlet of the heat exchanger and the outside environment. The air outlet of the heat exchanger is connected to the combustion zone. The heat exchanger can heat-exchange and heat the flue gas discharged from the cooling zone before re-introducing it into the combustion zone.

[0005] A kiln system according to an embodiment of the present utility model has at least the following technical effects:

[0006] In the operation of the kiln system in this embodiment, the exhaust gas discharged from the combustion zone passes through the quench zone and mixes with cold air in the quench zone to form flue gas. Then the flue gas is cooled again in the cooling zone and flows out through the exhaust port of the cooling zone. At this time, the flue gas in the cooling zone can enter the heat exchanger of the circulation module. Since the heat exchanger is located in the quench zone, the flue gas in the circulation can exchange heat energy with the flue gas in the quench zone through the heat exchanger, thereby increasing the temperature of the circulating flue gas. The heated flue gas is then transported to the combustion zone for combustion. From the above working process, it can be seen that the flue gas in the circulation is formed by the mixture of exhaust gas and cold air. The flue gas in the circulation is at a lower temperature and needs to be returned to the combustion zone for combustion support. The exhaust gas is output from the combustion zone and has a higher temperature. The exhaust gas in the quenching zone exchanges heat with the flue gas in the circulation, which can pre-cool the exhaust gas and raise the temperature of the flue gas in the circulation, reducing the energy consumption required for cooling the exhaust gas and raising the flue gas, thereby improving the utilization rate of thermal energy. Furthermore, it should be noted that the combustion zone is usually injected with ambient temperature air through an ambient temperature air combustion system for combustion support, while the flue gas discharged through the cooling zone is still at a higher temperature than ambient temperature. This means that the thermal energy of the flue gas discharged from the cooling zone helps to improve the combustion effect in the combustion zone, and the thermal energy of the flue gas discharged from the cooling zone can also be utilized. In addition, the flue gas discharged from the cooling zone is mixed with cold air, which is beneficial to improving the combustion support effect of the flue gas in the combustion zone.

[0007] According to some embodiments of the present invention, a kiln system includes a circulation module that further includes a temperature regulation structure. The temperature regulation structure is connected to the exhaust port of the cooling zone and the air inlet of the heat exchanger. The temperature regulation structure is used to regulate the flue gas output from the cooling zone to a preset temperature range before sending it into the heat exchanger.

[0008] According to some embodiments of the present invention, a kiln system includes a temperature regulation structure comprising a conveying pipe having a first air inlet, a second air inlet, and an air outlet. The first air inlet is connected to the exhaust port of the cooling zone, the second air inlet is used to receive cooling air, and the air outlet is connected to the air inlet of the heat exchanger.

[0009] According to some embodiments of the present invention, a kiln system includes a temperature regulation structure that further includes a first valve body and a temperature sensor. The first valve body is located at the second air inlet end, and the temperature sensor is used to detect the temperature of the flue gas at the air inlet of the heat exchanger and is electrically connected to the first valve body.

[0010] According to some embodiments of the present invention, a kiln system includes a circulation module that further includes a filter. The filter is connected to the air inlet of the heat exchanger and the flue gas outlet of the cooling zone, respectively. The filter is used to filter the flue gas to be introduced into the heat exchanger.

[0011] According to some embodiments of the present invention, a kiln system includes a circulation module that further includes a combustion-supporting fan. The outlet and inlet of the combustion-supporting fan are respectively connected to the inlet of the heat exchanger and the exhaust outlet of the cooling zone. The combustion-supporting fan is used to draw the exhaust gas discharged from the cooling zone into the heat exchanger.

[0012] According to some embodiments of the present invention, a kiln system includes a circulation module comprising multiple combustion fans, wherein the outlet and inlet of each combustion fan are connected to the inlet of the heat exchanger and the exhaust outlet of the cooling zone.

[0013] According to some embodiments of the present invention, in a kiln system, each combustion blower is provided with a second valve body at both its air inlet and outlet.

[0014] According to some embodiments of the present invention, a kiln system includes a heat exchanger comprising a heat exchange air box.

[0015] According to some embodiments of the present invention, a kiln system includes a heat exchanger comprising heat exchange tubes.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of a kiln system according to the present invention.

[0019] Figure label:

[0020] The kiln body is 100, the combustion zone is 110, the quench zone is 120, and the cooling zone is 130.

[0021] The components include: a circulation module 200, a heat exchanger 210, a temperature regulation structure 220, a conveying pipeline 221, a first valve body 222, a filter 230, a combustion fan 240, a second valve body 250, and a third valve body 260.

[0022] Fourth valve body 300. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] The following is for reference. Figure 1 A kiln system according to an embodiment of the present utility model will be described in detail.

[0028] refer to Figure 1 According to an embodiment of the present invention, a kiln system includes a kiln body 100, a gas supply module, and a circulation module 200. The kiln body 100 is provided with a combustion zone 110, a quenching zone 120, and a cooling zone 130. The exhaust gas discharged from the combustion zone 110 passes sequentially through the quenching zone 120 and the cooling zone 130. The cooling zone 130 has a flue gas outlet. The gas supply module is used to input cold air into the quenching zone 120, where the cold air mixes with the exhaust gas to form flue gas. The circulation module 200 includes a heat exchanger 210, which is located in the quenching zone 120. The flue gas outlet of the cooling zone 130 is connected to the air inlet of the heat exchanger 210 and the outside environment. The air outlet of the heat exchanger 210 is connected to the combustion zone 110. The heat exchanger 210 can heat-exchange and heat up the flue gas discharged from the cooling zone 130 before re-introducing it into the combustion zone 110.

[0029] In the operation of the kiln system in this embodiment, the exhaust gas discharged from the combustion zone 110 passes through the quench zone 120 and mixes with cold air in the quench zone 120 to form flue gas. Then the flue gas is cooled again in the cooling zone 130 and flows out through the exhaust port of the cooling zone 130. At this time, the flue gas in the cooling zone 130 can enter the heat exchanger 210 of the circulation module 200. Since the heat exchanger 210 is located in the quench zone 120, the flue gas in circulation can exchange heat energy with the flue gas in the quench zone 120 through the heat exchanger 210, thereby increasing the temperature of the circulating flue gas. The heated flue gas is then transported to the combustion zone 110 for combustion. From the above working process, it can be seen that the flue gas in the circulation is formed by the mixture of exhaust gas and cold air. The flue gas temperature in the circulation is low and needs to be returned to the combustion zone 110 for combustion support. The exhaust gas is output from the combustion zone 110 and has a higher temperature. The exhaust gas in the quench zone 120 exchanges heat with the flue gas in the circulation, which can pre-cool the exhaust gas and raise the temperature of the flue gas in the circulation, reducing the energy consumption required for cooling the exhaust gas and raising the flue gas, thereby improving the utilization rate of thermal energy. Furthermore, it should be noted that the combustion zone 110 is usually injected with room temperature air through a room temperature air combustion system for combustion support. The flue gas temperature discharged after the cooling zone 130 is still higher than room temperature, so the thermal energy of the flue gas discharged from the cooling zone 130 helps to improve the combustion effect of the combustion zone 110. The thermal energy of the flue gas discharged from the cooling zone 130 is also utilized. In addition, the flue gas discharged from the cooling zone 130 is mixed with cold air, which is beneficial to improving the combustion support effect of the flue gas on the combustion zone 110.

[0030] refer to Figure 1 In some embodiments of this utility model, the circulation module 200 further includes a temperature regulating structure 220. The temperature regulating structure 220 is connected to the exhaust port of the cooling zone 130 and the air inlet of the heat exchanger 210, respectively. The temperature regulating structure 220 is used to regulate the flue gas output from the cooling zone 130 to a preset temperature range before it is fed into the heat exchanger 210. It can be understood that by setting the temperature regulating structure 220 to regulate the temperature of the flue gas supplied from the cooling zone 130 to the circulation module 200, the temperature of the circulating flue gas is kept within a preset range, making the flue gas temperature in the heat exchanger 210 more stable. This reduces the possibility of fluctuating flue gas temperature in the heat exchanger 210, which could lead to a reduction in the service life of the heat exchanger 210.

[0031] like Figure 1As shown, in some embodiments, the temperature regulation structure 220 includes a conveying pipe 221, which has a first inlet end, a second inlet end, and an outlet end. The first inlet end is connected to the exhaust port of the cooling zone 130, the second inlet end is used to receive cooling air, and the outlet end is connected to the inlet of the heat exchanger 210. It can be understood that the flue gas output from the cooling zone 130 enters the conveying pipe 221 through the first inlet end, and then the cooling air enters the conveying pipe 221 through the second inlet end, mixing with the flue gas in the conveying pipe 221 to reduce the flue gas temperature. The cooled flue gas then enters the heat exchanger 210 through the outlet end of the conveying pipe 221, reducing the possibility that the flue gas temperature entering the heat exchanger 210 exceeds a preset temperature range.

[0032] Specifically, a third valve body 260 is provided at the first air inlet end of the conveying pipe 221, and a fourth valve body 300 is provided on the pipe connecting the exhaust port of the cooling zone 130 to the outside. By closing the third valve body 260 and opening the fourth valve body 300, the exhaust gas discharged from the cooling zone 130 can flow into the outside. By opening the third valve body 260 and closing the fourth valve body 300, the exhaust gas discharged from the cooling zone 130 can flow into the conveying pipe 221 for recycling.

[0033] like Figure 1 As shown, in one embodiment, the temperature regulation structure 220 further includes a first valve body 222 and a temperature sensor. The first valve body 222 is located at the second air inlet end, and the temperature sensor is used to detect the temperature of the flue gas at the air inlet of the heat exchanger 210 and is electrically connected to the first valve body 222. It can be understood that when the flue gas from the cooling zone 130 is delivered to the air inlet of the heat exchanger 210, the temperature sensor detects the temperature of the flue gas. When the temperature of the flue gas is higher than a preset temperature, the temperature sensor controls the first valve body 222 to open, allowing cooling air to enter the delivery pipe 221 through the second air inlet end and mix with the flue gas, thereby reducing the temperature of the flue gas until it is within the preset range.

[0034] Understandably, the temperature sensor can control the amount of cooling air input by controlling the opening and closing degree of the first valve body 222, thereby regulating the flue gas temperature at the inlet of the heat exchanger 210.

[0035] refer to Figure 1In some embodiments of this utility model, the circulation module 200 further includes a filter 230, which is connected to the air inlet of the heat exchanger 210 and the exhaust port of the cooling zone 130, respectively. The filter 230 is used to filter the flue gas entering the heat exchanger 210. It can be understood that after the flue gas output from the cooling zone 130 is filtered by the filter 230, impurities in the flue gas are removed, thereby reducing the amount of impurities in the flue gas entering the heat exchanger 210, thus reducing the possibility that the service life of the heat exchanger 210 will be reduced due to impurities in the flue gas.

[0036] Specifically, the second air inlet of the conveying pipe 221 is connected to the air inlet of the heat exchanger 210 via the filter 230, and the exhaust port of the cooling zone 130 is connected to the air inlet of the heat exchanger 210 via the heat exchanger 210. It can be understood that the filter 230 filters the cooling air input from the second air inlet and the exhaust gas output from the cooling zone 130, reducing impurities in the exhaust gas within the heat exchanger 210.

[0037] refer to Figure 1 In some embodiments of this utility model, the circulation module 200 further includes a combustion-supporting fan 240. The outlet and inlet of the combustion-supporting fan 240 are respectively connected to the inlet of the heat exchanger 210 and the exhaust port of the cooling zone 130. The combustion-supporting fan 240 is used to draw the flue gas discharged from the cooling zone 130 into the heat exchanger 210. It can be understood that the flue gas discharged from the cooling zone 130 becomes more uniform under the action of the combustion-supporting fan 240, and the combustion-supporting fan 240 can stably and continuously deliver the flue gas to the heat exchanger 210, thereby making the energy exchange of the flue gas in the heat exchanger 210 more stable and improving the combustion efficiency of the flue gas in the combustion zone 110.

[0038] Specifically, the air inlet of the combustion-supporting fan 240 is connected to the exhaust port of the cooling zone 130 through the filter 230, and the second air inlet of the conveying pipe 221 is connected to the air inlet of the combustion-supporting fan 240 through the filter 230. It is understood that the combustion-supporting fan 240 can more evenly mix the cooling air and flue gas.

[0039] like Figure 1 As shown, in some embodiments, the circulation module 200 includes multiple combustion-supporting fans 240, each of which has its outlet and inlet connected to the inlet of the heat exchanger 210 and the exhaust outlet of the cooling zone 130. It is understood that the exhaust outlet of the cooling zone 130 may selectively connect to the inlet of one of the combustion-supporting fans 240, thereby reducing the likelihood of a reduced lifespan for a single combustion-supporting fan 240 due to prolonged use.

[0040] like Figure 1As shown, in one embodiment, each combustion fan 240 is provided with a second valve body 250 at both its inlet and outlet. It is understood that opening the second valve body 250 of one combustion fan 240 and closing the second valve bodies 250 of the other combustion fans 240 reduces the possibility of flue gas flowing into other non-operating combustion fans 240, thereby damaging them.

[0041] refer to Figure 1 In some embodiments of this utility model, the heat exchanger 210 includes a heat exchange air box.

[0042] refer to Figure 1 In some embodiments of this utility model, the heat exchanger 210 includes heat exchange tubes.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A kiln system, characterized by, The application relates to a kiln body provided with a combustion zone, a quenching zone and a cooling zone, wherein waste gas discharged from the combustion zone passes through the quenching zone and the cooling zone in sequence, the cooling zone is provided with a flue gas outlet, a gas supply module is arranged for inputting cold air into the quenching zone, the cold air mixes with the waste gas to form flue gas, a circulating module is arranged and comprises a heat exchanger, the heat exchanger is arranged in the quenching zone, the flue gas outlet of the cooling zone is communicated with the air inlet of the heat exchanger and the outside, the air outlet of the heat exchanger is communicated with the combustion zone, and the heat exchanger can heat and exchange the flue gas discharged from the cooling zone and then re-transport the flue gas into the combustion zone. The circulating module further comprises a temperature adjusting structure, the temperature adjusting structure is communicated with the flue gas outlet of the cooling zone and the air inlet of the heat exchanger respectively, and the temperature adjusting structure is used for adjusting the flue gas output from the cooling zone to a preset temperature range and then transporting the flue gas into the heat exchanger. The temperature adjusting structure comprises a conveying pipeline, the conveying pipeline is provided with a first air inlet end, a second air inlet end and an air outlet end, the first air inlet end is communicated with the flue gas outlet of the cooling zone, the second air inlet end is used for receiving cooling air, and the air outlet end is communicated with the air inlet of the heat exchanger. The temperature adjusting structure further comprises a first valve body and a temperature sensor, the first valve body is arranged at the second air inlet end, the temperature sensor is used for detecting the temperature of the flue gas at the air inlet of the heat exchanger and is electrically connected with the first valve body.

2. A kiln system according to claim 1, wherein, The circulating module further comprises a filter, the filter is communicated with the air inlet of the heat exchanger and the flue gas outlet of the cooling zone respectively, and the filter is used for filtering the flue gas to be input into the heat exchanger.

3. A kiln system according to claim 2, wherein, The circulating module further comprises a combustion air fan, the air outlet and the air inlet of the combustion air fan are communicated with the air inlet of the heat exchanger and the flue gas outlet of the cooling zone respectively, and the combustion air fan is used for sucking the flue gas discharged from the cooling zone into the heat exchanger.

4. A kiln system according to claim 3, wherein, The circulating module comprises a plurality of combustion air fans, the air outlet and the air inlet of each combustion air fan are communicated with the air inlet of the heat exchanger and the flue gas outlet of the cooling zone.

5. A furnace system as claimed in claim 1, wherein, The air inlet and the air outlet of each combustion air fan are provided with a second valve body.

6. A furnace system as claimed in claim 1, wherein The heat exchanger comprises a heat exchange air box.

7. A furnace system according to claim 6, wherein The heat exchanger comprises a heat exchange pipe.

8. A furnace system according to claim 7, wherein ​ 9. A furnace system as claimed in claim 1, wherein ​ 10. A furnace system as claimed in claim 1, wherein ​

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