A wood-fired kiln for ceramic firing

Abstract

The utility model discloses a kind of for ceramic firing's wood kiln, including kiln body, be set to kiln door for opening and closing kiln room in kiln body front end place, and exhaust pipe;The both sides of the kiln body are provided with combustion furnace having combustion chamber;The upper portion of the combustion chamber is communicated with the inner cavity of kiln body;The combustion chamber has feeding opening, and the combustion furnace is provided with furnace door for opening and closing feeding opening;Ash-collecting chamber is arranged in the combustion furnace, below combustion chamber;The lower portion of ash-collecting chamber is provided with opening with its inner cavity equal width, and the opening is embedded with extractable ash-collecting groove;Air inlet pipe is arranged above ash-collecting chamber, above ash-collecting groove;Adjustable cover body is detachably connected on the air inlet pipe.The utility model has the advantages that: ash cleaning efficiency is significantly improved, labor intensity is reduced, and because ash cleaning time is short, cold air into kiln is effectively reduced, which is conducive to maintaining the reducing atmosphere and temperature stability during firing process.

Description

Technical Field

[0001] This utility model relates to the field of firing kiln technology, and in particular to a wood-fired kiln for firing ceramics. Background Technology

[0002] A wood-fired kiln is a traditional ceramic firing kiln that uses firewood as its primary fuel and holds an important place in the history of Chinese ceramics. During the firing process, the ash produced by burning wood enters the kiln chamber at high temperatures with the airflow and partially settles in specific areas. Simultaneously, unburned carbonaceous particles enter the ash chamber with the flue gas and accumulate there, forming carbon ash. This accumulation of carbon ash is a normal phenomenon in the operation of a wood-fired kiln. Especially in kilns employing flame-insulated or semi-flame-insulated structures, the ash chamber, as a collection space for combustion products, accumulates carbon ash more rapidly and requires regular cleaning to ensure the kiln's normal operation.

[0003] In existing wood-fired kilns, the ash chamber is typically located at the bottom of the combustion chamber to collect wood ash and incompletely burned carbon particles carried out by the airflow from the combustion zone. For example, Chinese utility model patent CN 222881673 U discloses a wood-fired kiln with a symmetrical double combustion chamber structure, which improves the uniformity of temperature and thermal efficiency within the kiln by optimizing the combustion layout. However, this technical solution does not address improvements to the ash chamber cleaning structure. In practical use, when the carbon ash accumulates to a certain amount in the ash chamber, if it is not cleaned in time, it will lead to a reduction in the flue gas flow cross-section and an increase in exhaust resistance, thereby affecting combustion efficiency and kiln pressure stability.

[0004] Currently, the cleaning of carbon ash in the ash chamber generally relies on manual operation. Operators open the ash cleaning port in the ash chamber and use shovels to remove the accumulated ash one by one. This method has problems such as slow cleaning speed, high labor intensity, and harsh working environment. Moreover, because the ash cleaning process is time-consuming, frequent opening and closing of the ash cleaning port can easily lead to a large amount of air entering the kiln system, disrupting the reducing atmosphere inside the kiln, causing temperature fluctuations, and hindering the continuous and stable control of the firing process.

[0005] Therefore, existing wood-fired kilns still suffer from technical defects in ash chamber cleaning, such as low efficiency, inconvenient operation, and easy interference with the firing atmosphere during the ash cleaning process. There is an urgent need to provide an ash chamber device with a reasonable structure that facilitates rapid ash cleaning in order to improve the operating efficiency and process controllability of wood-fired kilns. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a wood-fired kiln for ceramic firing.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] A wood-fired kiln for ceramic firing includes a kiln body, a kiln door for opening and closing the kiln chamber located at the front end of the kiln body, and an exhaust pipe; both sides of the kiln body are provided with combustion chambers; the upper part of the combustion chamber is connected to the inner cavity of the kiln body; the combustion chamber has a feeding port, and the combustion furnace is provided with a furnace door for opening and closing the feeding port; an ash collection chamber is provided inside the combustion furnace, below the combustion chamber; the lower part of the ash collection chamber has an opening of the same width as its inner cavity, and a removable ash collection trough is embedded in the opening; an air inlet pipe is provided on the ash collection chamber, above the ash collection trough, and an adjustable cover is detachably connected to the air inlet pipe.

[0009] As a preferred embodiment of the present invention, the ash collection trough is provided with a sealing gasket for sealing the opening.

[0010] As a preferred embodiment of this utility model, the ash collection trough is provided with a handle.

[0011] As a preferred technical solution of this utility model, the adjustable cover includes an end cover that is interference-fitted with the air inlet and a cover plate that is rotatably connected to the end cover. The end cover is provided with a first ventilation hole, and the cover plate is provided with a second ventilation hole that corresponds to and cooperates with the first ventilation hole.

[0012] As a preferred embodiment of this utility model, an operating lever is provided on the cover plate.

[0013] As a preferred embodiment of this utility model, a lower guide rail is provided on the combustion furnace below the feeding port, and an upper guide rail is provided on the combustion furnace above the feeding port. A roller is rotatably provided on the upper end of the furnace door; the roller is connected to the upper guide rail for rolling guidance.

[0014] The above technical solution has the following advantages:

[0015] This invention features a removable ash collection trough for collecting carbon ash, and correspondingly optimizes the ash chamber structure. This allows the ash collection trough to be quickly removed for cleaning when carbon ash accumulates to a certain level, significantly improving cleaning efficiency and reducing labor intensity. Furthermore, the short cleaning time effectively reduces the amount of cold air entering the kiln, which helps maintain a stable reducing atmosphere and temperature during firing. Simultaneously, an air inlet pipe with an adjustable cover is located above the ash collection trough in the ash chamber. This allows for flexible adjustment of ventilation volume according to the needs of different firing stages of the wood-fired kiln, separating the air intake and ash collection functions. This avoids the technical problems of air inlet blockage and difficulty in precise ventilation control caused by carbon ash accumulation in traditional structures, thereby improving the accuracy of wood-fired kiln combustion control and process continuity. Attached Figure Description

[0016] Figure 1This is a front view of one embodiment of the present utility model;

[0017] Figure 2 for Figure 1 A sectional view along the middle AA;

[0018] Figure 3 for Figure 1 3D exploded view;

[0019] Figure 4 for Figure 3 Enlarged view of section B;

[0020] In the picture:

[0021] 1-Kiln body, 2-Kiln door, 3-Exhaust pipe, 4-Combustion chamber, 5-Combustion furnace, 6-Feeding port, 7-Furnace door, 8-Ash collection chamber, 9-Ash collection trough, 10-Air inlet pipe, 11-Sealing gasket, 12-Adjustable cover, 13-Handle, 14-Lower guide rail, 15-Upper guide rail, 16-Roller;

[0022] 121-End cap, 122-Cover plate, 123-First ventilation hole, 124-Second ventilation hole, 125-Operating lever. Detailed Implementation

[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1

[0025] As attached Figure 1-4 As shown, a wood-fired kiln for ceramic firing includes a kiln body 1, a kiln door 2 for opening and closing the kiln chamber, and an exhaust pipe 3 located at the front end of the kiln body 1; a combustion furnace 5 with combustion chambers 4 is provided on both sides of the kiln body 1; the upper part of the combustion chamber 4 is connected to the inner cavity of the kiln body 1; the combustion chamber 4 has a feeding port 6, and the combustion furnace 5 is provided with a furnace door 7 for opening and closing the feeding port 6; an ash collection chamber 8 is provided inside the combustion furnace 5, below the combustion chamber 4; the lower part of the ash collection chamber 8 has an opening of the same width as its inner cavity (not shown in the figure), and a removable ash collection trough 9 is embedded in the opening; an air inlet pipe 10 is provided on the ash collection chamber 8, above the ash collection trough 9, and an adjustable cover 12 is detachably connected to the air inlet pipe 10.

[0026] In this embodiment, the air inlet pipe 10 can be located on the side wall or top of the ash collection chamber 8, and can be a single pipe or multiple symmetrically arranged pipes. The cover can be detachably fixed by threaded connection, snap-fit ​​structure or magnetic attraction. During operation, by replacing the cover with different through-hole areas or adjusting the opening of the cover, the airflow into the combustion chamber 4 can be flexibly controlled to meet the oxygen supply needs of the wood-fired kiln at different stages such as ignition, heating, and reduction. This design achieves spatial separation of air inlet and ash collection functions, avoiding the technical defects of traditional shared inlets that cause blockage of the air inlet channel and inaccurate airflow adjustment due to carbon ash accumulation, thus improving the accuracy of combustion control and ease of operation.

[0027] As a further improvement in this embodiment, the ash collection trough 9 can be detachably installed using a drawer-type slide rail structure, a roller guide groove structure, or a magnetic quick-release structure; its cross-section can be rectangular, trapezoidal, or U-shaped to adapt to different ash chamber structures. During operation, the carbon ash produced by combustion falls into the ash collection chamber 8 with the airflow and settles in the ash collection trough 9; when the accumulated ash reaches a certain amount, the operator can pull out the entire ash collection trough 9 horizontally for centralized cleaning. This structure achieves centralized collection and rapid removal of carbon ash, significantly improving ash cleaning efficiency and reducing the time the ash collection chamber is open; at the same time, it avoids the problem of frequent opening of the ash cleaning port during traditional manual ash removal, which leads to a large amount of cold air entering the kiln body 1, thus helping to maintain a stable reducing atmosphere in the kiln and improve the consistency of firing quality.

[0028] In one preferred embodiment of this invention, a sealing gasket 11 is provided on the ash collection trough 9 to seal the opening. The sealing gasket 11 can be located on the outer periphery of the ash collection trough 9, and the material can also be a high-temperature resistant sealing material such as silicone, ceramic fiber felt, or metal spiral wound gasket. During operation, when the ash collection trough 9 is inserted into place, the sealing gasket 11 is deformed under pressure, filling the gap between the ash collection trough 9 and the ash chamber opening, forming an airtight seal. This structure effectively prevents external air from uncontrolledly entering the combustion system through gaps during the ash cleaning process or after the ash collection trough 9 is reset, ensuring stable kiln pressure and avoiding localized oxidation that could affect the firing effect.

[0029] In one preferred embodiment of this invention, a handle 13 is provided on the ash collection trough 9. The handle 13 can be a fixed metal handle, a folding handle, or a ring-shaped pull ring, and the material can be stainless steel, heat-resistant alloy, or a metal rod coated with insulating ceramic. During operation, the operator applies horizontal force by gripping the handle 13 to smoothly pull out and push back the ash collection trough 9. This structure facilitates manual operation, especially reducing the risk of direct contact with metal parts in high-temperature environments, thus improving operational safety and convenience.

[0030] As a preferred embodiment of this invention, the adjustable cover 12 includes an end cover 121 that is interference-fitted with the air inlet, and a cover plate 122 that is rotatably connected to the end cover 121. The cover plate 122 and the end cover 121 are connected by a damped rotation mechanism. The end cover 121 is provided with a first ventilation hole 123, and the cover plate 122 is provided with a second ventilation hole 124 that corresponds to and cooperates with the first ventilation hole 123. The damped rotation structure can be replaced with a spring hinge, a friction hinge, or a magnetic damping device. The cover plate 122 can also be designed as a sliding, lifting, or rotary butterfly valve structure. During operation, by rotating the cover plate 122, the overlapping area of ​​the second ventilation hole 124 and the first ventilation hole 123 is adjusted, thereby achieving stepless adjustment of the air intake. This structure can continuously adjust the ventilation volume without replacing parts, has a fast response speed, and high control precision, making it suitable for high-end ceramic firing processes with strict requirements for the firing atmosphere.

[0031] In one preferred embodiment of this invention, an operating lever 125 is provided on the cover plate 122. The operating lever 125 can be a straight lever, a curved lever, or a T-shaped handle, and its length is adjustable or foldable for storage. During operation, the user can adjust the opening of the ventilation holes by rotating the cover plate 122 remotely using the operating lever 125, which is particularly suitable for avoiding the safety risks associated with close-range operation under high-temperature conditions. Simultaneously, the operating lever 125 enhances torque transmission efficiency, making adjustment more effortless and precise.

[0032] In one preferred embodiment of this invention, a lower guide rail 14 is provided on the combustion furnace 5 below the feeding port 6, and an upper guide rail 15 is provided on the combustion furnace 5 above the feeding port 6. A roller 16 is rotatably mounted on the upper end of the furnace door 7. The roller 16 is connected to the upper guide rail 15 for rolling guidance. The guide rail can be a linear slide rail, an arc-shaped guide rail, or a double-rail guide structure; the roller 16 can be replaced with a slider, bearing assembly, etc. During operation, when the furnace door 7 is opened, the roller 16 rolls along the upper guide rail 15 to fully expose the feeding port 6; when closed, the operation is reversed, and the furnace door 7 resets and seals. This structure ensures smooth opening and closing of the furnace door 7, accurate positioning, reduced wear on the sealing surface, and extended service life.

[0033] When using the wood-fired kiln described in this utility model, the ash collection trough 9 is first pushed into the opening at the bottom of the ash collection chamber 8, and the sealing gasket 11 ensures an airtight fit between the ash collection trough and the ash chamber, guaranteeing the overall sealing of the combustion system. The kiln door 2 and furnace door 7 are then closed, and the firing program is started. During the ignition stage, the adjustable cover 12 on the air inlet pipe 10 is adjusted so that the second ventilation hole 124 on the cover plate 122 is fully aligned or partially overlapped with the first ventilation hole 123 on the end cover 121, thereby controlling the initial air intake and meeting the oxygen supply required for wood ignition. The operator opens the furnace door 7 through the rolling guide structure of the upper guide rail 15 and roller 16, and puts firewood into the combustion chamber 4 from the feeding port 6 for combustion. The carbon ash and unburned particles generated during combustion fall into the ash collection chamber 8 under the influence of airflow and are deposited in the ash collection trough 9, while the hot flue gas enters the kiln chamber through the upper part of the combustion chamber 4 to heat the ceramic blank. As the firing process enters the heating and reduction stages, the overlapping area of ​​the first ventilation hole 123 and the second ventilation hole 124 can be gradually reduced by rotating the cover plate 122 using the operating lever 125, achieving stepless adjustment of the air intake and thus precisely controlling the oxidation or reduction atmosphere inside the kiln to meet the firing conditions required for the formation of different glaze colors. During this process, the ash collection trough 9 continuously collects the falling carbon ash, preventing ash from clogging the air intake channel or affecting combustion efficiency. When the firing cycle is completed or the carbon ash in the ash collection trough 9 accumulates to a certain amount, a cleaning operation can be performed: the ash collection trough 9 is pulled out horizontally using the handle 13 and moved to the external cleaning area for centralized dumping or cleaning of the carbon ash. After cleaning, the ash collection trough 9 is pushed back into its original position to restore the sealed state, ready for the next round of firing.

[0034] In the description of the above embodiments, for the sake of brevity and clarity, some components and their specific structural details that are not directly related to the core innovations of this utility model have been omitted. These omitted parts all fall within the scope of existing technology, and those skilled in the art can fully implement the design and manufacture of these parts based on their professional knowledge and existing technical materials. Therefore, they will not be described in detail here.

[0035] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A wood-fired kiln for ceramic firing, comprising a kiln body (1), a kiln door (2) disposed at the front end of the kiln body (1) for opening and closing the kiln chamber, and an exhaust pipe (3); both sides of the kiln body (1) are provided with a combustion furnace (5) having a combustion chamber (4); the upper part of the combustion chamber (4) is connected to the inner cavity of the kiln body (1); the combustion chamber (4) has a feeding port (6), and the combustion furnace (5) is provided with a furnace door (7) for opening and closing the feeding port (6); an ash collection chamber (8) is provided inside the combustion furnace (5) below the combustion chamber (4); characterized in that: The lower part of the ash collection chamber (8) is provided with an opening of the same width as its inner cavity, and a removable ash collection trough (9) is installed at the opening; an air inlet pipe (10) is provided on the ash collection chamber (8) above the ash collection trough (9), and an adjustable cover (12) is detachably connected to the air inlet pipe (10).

2. The wood-fired kiln for ceramic firing according to claim 1, characterized in that: The ash collection trough (9) is provided with a sealing gasket (11) for sealing the opening.

3. The wood-fired kiln for ceramic firing according to claim 1 or 2, characterized in that: A handle (13) is provided on the ash collection trough (9).

4. The wood-fired kiln for ceramic firing according to claim 1 or 2, characterized in that: The adjustable cover (12) includes an end cap (121) that is interference-fitted with the air inlet and a cover plate (122) that is rotatably connected to the end cap (121). The end cap (121) is provided with a first ventilation hole (123) and the cover plate (122) is provided with a second ventilation hole (124) that corresponds to and cooperates with the first ventilation hole (123).

5. The wood-fired kiln for ceramic firing according to claim 3, characterized in that: The adjustable cover (12) includes an end cap (121) that is interference-fitted with the air inlet and a cover plate (122) that is rotatably connected to the end cap (121). The end cap (121) is provided with a first ventilation hole (123) and the cover plate (122) is provided with a second ventilation hole (124) that corresponds to and cooperates with the first ventilation hole (123).

6. The wood-fired kiln for ceramic firing according to claim 4, characterized in that: An operating lever (125) is provided on the cover plate (122).

7. The wood-fired kiln for ceramic firing according to claim 1 or 2, characterized in that: A lower guide rail (14) is provided on the combustion furnace (5) below the feeding port (6), and an upper guide rail (15) is provided on the combustion furnace (5) above the feeding port (6). A roller (16) is rotatably provided on the upper end of the furnace door (7); the roller (16) is connected to the upper guide rail (15) for rolling guidance.

8. The wood-fired kiln for ceramic firing according to claim 3, characterized in that: A lower guide rail (14) is provided on the combustion furnace (5) below the feeding port (6), and an upper guide rail (15) is provided on the combustion furnace (5) above the feeding port (6). A roller (16) is rotatably provided on the upper end of the furnace door (7); the roller (16) is connected to the upper guide rail (15) for rolling guidance.

9. The wood-fired kiln for ceramic firing according to claim 4, characterized in that: A lower guide rail (14) is provided on the combustion furnace (5) below the feeding port (6), and an upper guide rail (15) is provided on the combustion furnace (5) above the feeding port (6). A roller (16) is rotatably provided on the upper end of the furnace door (7); the roller (16) is connected to the upper guide rail (15) for rolling guidance.

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