Vertical direct combustion furnace

Abstract

The utility model provides a vertical direct-fired furnace, and relates to the technical field of direct-fired furnaces. The first cavity and the second cavity are arranged in the furnace body side by side, the top of the first cavity is communicated with the top of the second cavity, an air inlet is formed in the lower portion of the side wall of the first cavity, and an air outlet is formed in the bottom face of the second cavity. The furnace is reasonable in structural design, the interior of the furnace body is reasonably divided into the first cavity and the second cavity, so that the retention time of waste gas in the furnace is prolonged, meanwhile, the arc-shaped inner wall structures and the inclined top structures are designed for the first cavity and the second cavity, and the retention time of the waste gas in the furnace is further prolonged; organic waste gas is fully oxidized and decomposed at high temperature, and meanwhile, large-particle substances in the waste gas can be better settled. The utility model solves the problems that the retention time of waste gas in the furnace is too short and the waste gas treatment efficiency is not high due to unreasonable structural design of the direct-fired furnace in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of direct-fired furnaces, and in particular to a vertical direct-fired furnace. Background Art

[0002] With the rapid development of industrialization, the balance between energy utilization and environmental protection has become an urgent problem to be solved. Especially in the field of waste gas treatment, how to efficiently treat harmful gases generated in industrial production and prevent them from polluting the environment is the focus of current technical research.

[0003] As a waste gas treatment equipment, the direct-fired furnace is used to oxidize and decompose gases containing VOCs at high temperatures, and achieve the expected purification effect through four combustion conditions: reasonable oxygen supply, combustion temperature, residence time and turbulence.

[0004] However, the existing direct-fired furnace structure design is not reasonable enough, resulting in problems such as the exhaust gas residence time in the furnace is too short and the exhaust gas treatment efficiency is low. Utility Model Content

[0005] The main purpose of the utility model is to provide a vertical direct-fired furnace, so as to at least solve the problem that the direct-fired furnace in the prior art has an unreasonable structural design, resulting in too short a residence time of the exhaust gas in the furnace and low exhaust gas treatment efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a vertical direct-fired furnace, comprising: a furnace body; a first cavity and a second cavity arranged side by side in the furnace body, the tops of the first cavity and the second cavity are connected to each other, an air inlet is opened at the lower part of the side wall of the first cavity, and an air outlet is opened on the bottom surface of the second cavity.

[0007] Furthermore, a burner for heating the organic waste gas is arranged in the air inlet.

[0008] Furthermore, the first cavity and the second cavity are both cylindrical cavity structures with contracted bottoms and tops and expanded middles, and the inner walls of the first cavity and the second cavity both form arc-shaped inner wall structures for forming a spiral airflow of the organic waste gas.

[0009] Furthermore, the top surfaces of the first cavity and the second cavity are inclined roof structures with a preset slope; wherein the preset slope ranges from 10 to 20 degrees.

[0010] Furthermore, the preset slope is 15°.

[0011] Furthermore, a first ash cleaning port is provided at the lower portion of the side wall of the first cavity, and a second ash cleaning port is provided on the side wall of the second cavity.

[0012] Furthermore, the furnace body is made of carbon steel, and the inner wall of the furnace body is evenly paved with thermal insulation cotton, which is made of high-temperature resistant ceramic fiber.

[0013] Furthermore, a partition for fixing the thermal insulation cotton is arranged between the first cavity and the second cavity.

[0014] The vertical direct-fired furnace of the technical solution of the utility model comprises: a furnace body; a first cavity and a second cavity arranged side by side in the furnace body, the tops of the first cavity and the second cavity are interconnected, an air inlet is provided at the lower part of the side wall of the first cavity, and an air outlet is provided on the bottom surface of the second cavity. The structure of the utility model is reasonably designed. By reasonably dividing the interior of the furnace body into the first cavity and the second cavity, the residence time of the exhaust gas in the furnace is prolonged. At the same time, the first cavity and the second cavity are designed with an arc-shaped inner wall structure and an inclined roof structure, which further prolongs the residence time of the exhaust gas in the furnace, allowing the organic exhaust gas to be fully oxidized and decomposed at high temperature, and also allowing the large particles in the exhaust gas to settle better. The utility model solves the problem that the structure design of the direct-fired furnace in the prior art is not reasonable, resulting in too short a residence time of the exhaust gas in the furnace and low exhaust gas treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a front cross-sectional schematic diagram of a vertical direct-fired furnace that can be selected according to an embodiment of the utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of a vertical direct-fired furnace that can be selected according to an embodiment of the utility model.

[0018] The above drawings include the following reference numerals:

[0019] 10. Furnace body; 20. First cavity; 21. Air inlet; 22. First ash cleaning port; 211. Burner; 30. Second cavity; 31. Air outlet; 32. Second ash cleaning port; 40. Insulation cotton; 50. Partition. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] like Figure 1 and Figure 2As shown, the utility model provides a vertical direct-fired furnace, comprising: a furnace body 10; a first cavity 20 and a second cavity 30 arranged side by side in the furnace body 10, the tops of the first cavity 20 and the second cavity 30 are connected to each other, an air inlet 21 is provided at the lower part of the side wall of the first cavity 20, and an air outlet 31 is provided on the bottom surface of the second cavity 30. The utility model has a reasonable structural design, and the residence time of the exhaust gas in the furnace is prolonged by reasonably dividing the interior of the furnace body into the first cavity and the second cavity.

[0022] As an optimization solution of the utility model, Figure 1 As shown, a burner 211 for heating the organic waste gas is disposed in the air inlet 21. Preferably, the organic waste gas is heated to 750°C by the burner 211 and then enters the first cavity 20.

[0023] As an optimization solution of the utility model, Figure 1 As shown, the first cavity 20 and the second cavity 30 are both cylindrical cavity structures with contracted bottom and top and expanded middle parts, and the inner walls of the first cavity 20 and the second cavity 30 are both formed with an arc-shaped inner wall structure for causing the organic waste gas to form a spiral airflow. Preferably, after the organic waste gas enters the first cavity 20, it rises through the arc-shaped inner wall to form a spiral airflow, and when the organic waste gas enters the second cavity 30, the speed is reduced, and it still descends through the arc-shaped inner wall to form a spiral airflow. The organic waste gas forms a spiral airflow, which can extend the residence time of the organic waste gas in the furnace, making the residence time greater than 2s, so that the organic waste gas can be fully oxidized and decomposed at high temperature. At the same time, the spiral airflow can also allow large particles in the organic waste gas to settle better, further improving the waste gas treatment efficiency.

[0024] As an optimization solution of the utility model, Figure 1 and Figure 2 As shown, the top surface of the first cavity 20 and the second cavity 30 is a sloping roof structure with a preset slope; wherein the preset slope ranges from 10 to 20 degrees. Preferably, the sloping roof structure can accelerate the airflow reaching the top of the first cavity 20 to move diagonally downward, which can prevent the organic waste gas from accumulating at the top of the first cavity 20 and being unable to enter the second cavity 30, and at the same time accelerate the airflow to move diagonally downward until the organic waste gas enters the second cavity 30 and reduces the speed, which is more conducive to forming a spiral airflow. Preferably, considering the manufacturing difficulty, manufacturing cost and acceleration speed, a preset slope range of 10 to 20 degrees is more appropriate.

[0025] As an optimization scheme of the utility model, preferably, when the preset slope is 15°, the residence time of the organic waste gas in the furnace is the longest and the waste gas treatment efficiency is the highest.

[0026] As an optimization solution of the utility model, Figure 2As shown, a first cleaning port 22 is provided at the lower portion of the side wall of the first cavity 20, and a second cleaning port 32 is provided on the side wall of the second cavity 30. Preferably, the first cleaning port 22 and the second cleaning port 32 are used to be opened to remove dust deposited at the bottom of the furnace body 10 when the vertical direct-fired furnace stops running.

[0027] As an optimization solution of the utility model, Figure 1 As shown, the furnace body 10 is made of carbon steel, and the inner wall of the furnace body 10 is evenly paved with insulation cotton 40, which is made of high-temperature resistant ceramic fiber. Preferably, the advantage of the furnace body 10 being made of carbon steel is its high strength and good corrosion resistance, which makes the furnace body structure stable and durable; at the same time, carbon steel has good high-temperature resistance and is suitable for high-temperature working environment; in addition, carbon steel has excellent processing and welding performance, is easy to manufacture and install, and improves production efficiency. The insulation cotton 40 is made of high-temperature resistant ceramic fiber, which has the advantage of having excellent high-temperature resistance, can effectively isolate the high-temperature environment and prevent heat loss; at the same time, the ceramic fiber has a low thermal conductivity, which makes the insulation effect more significant; in addition, it also has excellent fire resistance, corrosion resistance, softness and lightness, etc., which ensures the stability and durability of the insulation cotton.

[0028] As an optimization solution of the utility model, Figure 1 As shown, a partition 50 for fixing the thermal insulation cotton 40 is arranged between the first cavity 20 and the second cavity 30 .

[0029] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vertical direct-fired furnace, characterized in that: include: Furnace body (10); A first cavity (20) and a second cavity (30) are arranged side by side in the furnace body (10); the tops of the first cavity (20) and the second cavity (30) are connected to each other; an air inlet (21) is provided at the lower part of the side wall of the first cavity (20); and an air outlet (31) is provided on the bottom surface of the second cavity (30).

2. The vertical direct-fired furnace according to claim 1, characterized in that: A burner (211) for heating the organic waste gas is arranged in the air inlet (21).

3. The vertical direct-fired furnace according to claim 1, characterized in that: The first cavity (20) and the second cavity (30) are both cylindrical cavity structures with contracted bottoms and tops and expanded middles, and the inner walls of the first cavity (20) and the second cavity (30) are both formed into arc-shaped inner wall structures for causing the organic waste gas to form a spiral airflow.

4. The vertical direct-fired furnace according to claim 1, characterized in that: The top surfaces of the first cavity (20) and the second cavity (30) are inclined roof structures with a preset slope; wherein the preset slope ranges from 10 to 20 degrees.

5. The vertical direct-fired furnace according to claim 4, characterized in that: The preset slope is 15°.

6. The vertical direct-fired furnace according to claim 1, characterized in that: A first ash cleaning port (22) is also provided at the lower portion of the side wall of the first cavity (20), and a second ash cleaning port (32) is provided on the side wall of the second cavity (30).

7. The vertical direct-fired furnace according to claim 1, characterized in that: The furnace body (10) is made of carbon steel, and thermal insulation cotton (40) is evenly laid on the inner wall of the furnace body (10), and the thermal insulation cotton (40) is made of high-temperature resistant ceramic fiber.

8. The vertical direct-fired furnace according to claim 7, characterized in that: A partition (50) for fixing the thermal insulation cotton (40) is provided between the first cavity (20) and the second cavity (30).

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