A breathable tank structure and method for a tank furnace

Abstract

This invention discloses a permeable tank structure and method for a tank furnace. The permeable tank structure consists of a tank body, lower support bricks, and exhaust duct bricks. The cavity formed by the exhaust duct bricks becomes a novel exhaust channel. All masonry materials are refractory silica bricks. The lower support bricks and exhaust duct bricks are built from bottom to top to form a wall, which is embedded into the upper part of the tank body at both ends, and is positioned by the internal misalignment within the tank. This invention is simple to manufacture, has low implementation costs, efficiently and rapidly discharges volatiles, has stable performance, a long service life, ensures product quality and production capacity, and has low operating and maintenance costs.

Description

Technical Field

[0001] The invention relates to a pot-type carbon calcining furnace production device in carbon production, in particular to a pot-type furnace pot body air-permeable structure and method. Background Art

[0002] At present, the carbon production process requires that the carbon raw materials be calcined in a tank furnace, and the fuel is the combustible volatile matter contained in the raw materials, in order to save energy and protect the environment.

[0003] In the prior art, the invention patent with publication number CN107764050A discloses a can-type calcining furnace in the field of carbon production, and in particular, relates to a can-type carbon calcining furnace preheating air vertical channel structure. A can-type carbon calcining furnace preheating air vertical channel structure, in which a preheating air main channel, a flue branch channel and a fire branch channel are provided in the furnace masonry of the front wall of the furnace, the preheating air main channel is connected with one end of the fire branch channel, a preheating air fire channel distribution hole is provided at the other end of the fire branch channel, the preheating air fire channel distribution hole is connected with the fire channel through the fire inlet hole, one end of the flue branch channel is connected to the connection between the preheating air main channel and the fire branch channel, a preheating air flue distribution hole is provided at the other end of the preheating air flue branch channel, the preheating air flue distribution hole is provided, the preheating air flue distribution hole is provided at the top of the flue, and the connecting flue is provided on the outside of the furnace masonry.

[0004] The invention patent with the publication number CN102745671A discloses a can-type carbon calcining furnace, which belongs to the calcining furnace for carbon production. In the can-type carbon calcining furnace, every four calcining cans and the furnace wall with heating fire channels on both sides of the can body constitute a combustion chamber, there are expansion joints and collecting flues between the combustion chambers, the furnace wall with heating fire channels has 8-10 layers of fire channels, the fire channels are connected to the preheating air channel, the calcining can body is connected to the discharge can, and there is an interlayer cooling water jacket around the discharge can. The whole calcining furnace is composed of 18 combustion chambers arranged in a straight line, a total of 72 calcining cans, a furnace guarding large knife rack is provided outside the front wall of the calcining furnace, a furnace guarding rack is provided outside the rear wall, the bottom of the combustion chamber is supported by the furnace bottom pillar, a feeding port is provided on the top of the calcining can body, and the bottom is connected to the discharge can, and there is an interlayer cooling water jacket around the discharge can, a discharge machine is installed at the lower end of the discharge can, and a small silo is provided between the discharge machine and the discharge valve. It realizes two-way utilization of volatile matter and fully automatic closed continuous discharging, with good economic and environmental benefits.

[0005] In the prior art, indirect heating is generally adopted outside the tank body, and after the volatiles are heated, they are all introduced into the fire channel from the upper opening of the tank body for combustion. The defects of this structure and method are: 1. The material layer resistance is too large, especially the material in the center of the tank, which generally needs to be heated to the temperature at which the volatiles are completely released at the height of the 6th fire channel or even below, and then the precipitated volatiles need to overcome the material resistance of the 6th fire channel height to enter the tank top outlet, which makes it difficult to discharge the volatiles, affecting the calcination quality and production capacity; 2. The volatiles that are difficult to release will repeatedly condense after encountering cold materials in the process of passing through the material layer upwards, which not only increases the heat transfer burden, but also causes material coking, material shed and other phenomena, leading to safety hazards; 3. The material resistance in the tank causes excessive positive pressure, and the upward exhaust is blocked, and some volatiles flow downward. At the water jacket, discharger, and vibrating conveyor below the height of the 7th and 8th fire channels, they encounter leaked air and cause explosions, thereby affecting safe production.

[0006] Obviously, the tank structure and exhaust method of the existing tank furnace are not ideal. Summary of the invention

[0007] The purpose of the present invention is to provide a breathable tank structure and method for a tank furnace, which has simple manufacturing, low implementation cost, efficient and rapid discharge of volatiles, stable performance, long service life, guaranteed product quality and production capacity, and low operation and maintenance costs.

[0008] The technical solution of the present invention is: the breathable tank structure is composed of a tank body, lower pad bricks and exhaust duct bricks. The cavity formed by the exhaust duct bricks becomes a new exhaust duct. All masonry materials are made of refractory silica bricks. The lower pad bricks and exhaust duct bricks are laid from bottom to top to form a wall, which is respectively embedded in the inner ends of the middle and upper sections of the tank body and is positioned by the misalignment in the tank.

[0009] As a further preferred solution, the main body of the tank is a traditional rectangular tank structure, which is formed by a combination of several special-shaped bricks with tongue and groove; in the area where the curved bricks are located at both ends of the upper and middle part of the tank, there is a staggered space on the inside, and the staggered depth is 5 to 15 mm; the two ends of the bottom of the tank are thicker solid structures, which serve as supports for the embedded bricks in the upper and middle part.

[0010] As a further preferred solution, the lower pad bricks are rectangular solid bricks (with two rounded corner transitions) embedded in the staggered platforms at both ends of the middle section of the tank body; this part of the bricks serves as a transition to the silicon brick tank body, and is built upward from the solid support platform of the clay brick section at the bottom of the tank body, with a height of approximately 1000 to 2000 mm, roughly at the height of the 7th to 8th fire channel.

[0011] As a further preferred solution, the exhaust duct brick has the same outline as the lower pad brick and is laid directly above the lower pad brick; there is a long circular through hole in the middle of the exhaust duct brick, with a specification of (200-300mm) x (30-80mm), and an internal flow cross-section of about 0.01-0.02m 2 After combined masonry, an exhaust channel is formed to reach the top of the tank; a flat channel is left on the top (or bottom) surface of each exhaust duct brick, each seam is 200-360mm long, 5-30mm high, and the spacing is 50-100mm. This is the airflow collection channel for the materials at the height of each layer of bricks.

[0012] During normal operation, the material in the tank is heated to release combustible volatiles, and part of the airflow passes through the material upward to the top of the tank; the rest of the airflow passes through the flat channels for collecting airflow at each layer, and reaches the exhaust channels at both ends of the tank body horizontally and then directly reaches the top of the tank. In this way, even if the volatiles are at the height of the 6th (or even 8th) layer of the fire channel, they can still be easily discharged upward through the exhaust channel, and the material in the tank will not enter the exhaust channel.

[0013] Compared with the existing technology, this structure has simple construction, low implementation cost, efficient and rapid discharge of volatiles, stable performance, long service life, guaranteed product quality and production capacity, high thermal energy utilization rate, and low operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front cross-sectional schematic diagram of the present invention;

[0015] Figure 2 It is a side sectional schematic diagram of the present invention;

[0016] Figure 3 It is a schematic plan view of the present invention.

[0017] The markings in the attached drawings are: 1-tank body, 2-lower pad brick, 3-exhaust duct brick. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Embodiment 1:

[0020] Breathable tank structure Figure 1As shown, all are built with silicon bricks, and all brick joints are filled with mortar; the main body of the tank body 1 is a traditional rectangular tank body structure, which is formed by a combination of several special-shaped bricks with tongue and groove. In the area where the arc bricks are located at both ends of the upper and middle parts of the tank body, there is a staggered space on the inside, and the staggered depth is 10mm; the lower pad brick 2 is a rectangular solid brick (with two corner arc transitions) masonry, which is stuck in the staggered at both ends of the tank body 1, and the height supported by the clay brick section at the bottom of the tank body 1 is 1768mm, which is roughly at the height of the 7th to 8th layer of the fire channel; the exhaust duct brick 3 is located directly above the lower pad brick 2, with a long round through hole in the middle, with a specification of 300mmx50mm, and an internal flow section of about 0.015m 2 After combined masonry, an exhaust channel is formed to reach the tank top; two flat channels are left on the top surface of each exhaust duct brick 3, with a specification of 110mmx20mm and a spacing of 68mm.

[0021] During normal operation, the material in the tank is heated to release combustible volatiles, part of which passes through the material upward to the tank top; the remaining airflow passes through the flat channels for collecting airflow at each layer, reaches the exhaust channels at both ends of the tank body 1 horizontally, and then reaches the tank top directly, while the material in the tank will not enter the exhaust channels.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A breathable tank structure of a tank furnace, characterized in that: The invention is composed of a tank body (1), a lower pad brick (2) and an exhaust duct brick (3). The cavity formed by the exhaust duct brick (3) becomes a new exhaust duct. The masonry materials of the tank body (1), the lower pad brick (2) and the exhaust duct brick (3) are all made of refractory silica bricks. The lower pad brick (2) and the exhaust duct brick (3) are masonried from bottom to top to form a wall, which is respectively embedded at the two ends of the inner part of the middle and upper section of the tank body (1) and is positioned by the staggered position in the tank. In the area where the curved bricks are located at the two ends of the middle and upper section of the tank body (1), a staggered space is reserved on the inner side, and the staggered depth is 5 to 15 mm. The two ends of the bottom of the tank body (1) are solid structures, which serve as supports for the embedded bricks in the middle and upper section. The lower pad brick (2) is a rectangular solid brick masonry with two corner arc transitions. The lower pad brick (2) is embedded in the tank. The exhaust brick (3) is arranged in the staggered platform at both ends of the middle section of the tank body (1); the outer contour of the exhaust brick (3) is consistent with that of the lower pad brick (2), and is laid directly above the lower pad brick (2); the exhaust brick (3) has an oblong through hole in the middle, and after being laid together, an exhaust channel is formed to reach the tank top; a flat channel is left on the top or bottom of each exhaust brick (3); the exhaust method of the tank structure is as follows: during normal operation, the material in the tank is heated to precipitate combustible volatiles, and part of the air flow passes through the material upward to reach the tank top; the remaining air flow passes through the flat channels for air flow collection at each layer, and reaches the exhaust channels at both ends of the tank body (1) horizontally and reaches the tank top directly; in this way, even if the volatiles are at the height of the 6th or even 8th layer of the fire channel, they can still be easily discharged upward through the exhaust channel, and the material in the tank will not enter the exhaust channel.

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