Carbonization secondary combustion chamber structure

Abstract

The utility model discloses a carbonization secondary combustion chamber structure which comprises a horizontal furnace body and a vertical furnace body, the vertical furnace body is arranged in the middle of the top end of the horizontal furnace body and communicated with the horizontal furnace body, upward inclined baffles are symmetrically arranged in the vertical furnace body, a plurality of through holes are evenly formed in the baffles, and the through holes are communicated with the horizontal furnace body. A flue gas channel smaller than the inner diameter of the vertical furnace body is defined between the baffle and the vertical furnace body, and the top end of the vertical furnace body is connected with a jacket layer of an external carbonization furnace. The vertical furnace body connected with the jacket layer of the carbonization furnace is additionally arranged above the horizontal furnace body, so that the retention time of flue gas in the secondary combustion chamber can be prolonged, sufficient combustion of hot flue gas is facilitated, meanwhile, the flow velocity of the hot flue gas can be reduced through the arranged perforated baffle, dust sedimentation is facilitated, and the combustion efficiency is improved. The content of dust carried in hot flue gas entering the carbonization furnace can be reduced, and the problem of serious dust accumulation in the jacket of the carbonization furnace can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge treatment, in particular to a carbonization secondary combustion chamber structure. Background Art

[0002] Sludge carbonization utilizes the thermal instability of organic matter in sludge and heats it under anoxic conditions, causing thermal cracking of the organic matter, forming a gas phase (pyrolysis gas) and a solid phase (solid residue). This is a type of sludge thermal treatment. The main process of the carbonization system is that the fuel is burned through a carbonization burner. The hot flue gas generated by the combustion is fully burned in the carbonization secondary combustion chamber and then enters the jacket layer of the carbonization furnace, indirectly heating the sludge inside the carbonization furnace.

[0003] Because the hot flue gas flows upward, the carbonization furnace is currently arranged above the carbonization secondary combustion chamber. Currently, conventional carbonization secondary combustion chambers are of two types: horizontal and vertical. When using a horizontal carbonization secondary combustion chamber, a small amount of dust is generated during both the fuel combustion process and the combustion of sludge pyrolysis gas. After long-term operation, the carbonization furnace jacket accumulates seriously. Since the height from the outer diameter of the inner tube to the bottom of the jacket layer is only 20cm, the accumulated dust is difficult to clean. Conventional vertical secondary combustion chambers are short in the air intake direction, and the inner wall of the hot blast furnace is subjected to strong heat radiation, which is not conducive to heat utilization. As a result, both have certain defects during use.

[0004] In view of this, a carbonization secondary combustion chamber structure is proposed. Utility Model Content

[0005] The purpose of the present utility model is to provide a carbonization secondary combustion chamber structure in order to solve the above-mentioned problems.

[0006] The technical solution adopted by the present utility model is as follows: a carbonization secondary combustion chamber structure, including a horizontal furnace body and a vertical furnace body, the vertical furnace body is arranged in the middle of the top end of the horizontal furnace body and is connected to the horizontal furnace body, the interior of the vertical furnace body is symmetrically provided with upward inclined baffles, and a plurality of through holes are evenly opened on the baffles, the baffles and the vertical furnace body together form a flue gas channel smaller than the inner diameter of the vertical furnace body, and the top end of the vertical furnace body is connected to the jacket layer of the external carbonization furnace.

[0007] In a preferred embodiment, a plurality of air distribution ports are provided on the side of the horizontal furnace body, and a one-way valve for one-way air intake from outside to inside is accommodated inside the air distribution port.

[0008] In a preferred embodiment, a pyrolysis gas recycling port is provided on the side of the horizontal furnace body, and the pyrolysis gas recycling port is connected to the inner cylinder of the external carbonization furnace through a pipeline.

[0009] In a preferred embodiment, a ash cleaning port is further provided at the lower side of the horizontal furnace body, and a ash cleaning cover is hingedly connected to the ash cleaning port via a hinge.

[0010] In a preferred embodiment, a burner connection interface is provided on one end wall of the horizontal furnace body, and the burner connection interface is connected to an external carbonization burner through a pipeline.

[0011] In a preferred embodiment, a peephole and an inspection door are further provided at the other end of the horizontal furnace body, and a peephole is provided inside the peephole.

[0012] In a preferred embodiment, the other side of the horizontal furnace body is further provided with an electric air valve connected thereto.

[0013] In a preferred embodiment, a support base is welded to the bottom end of the horizontal furnace body.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0015] 1. In the present invention, a vertical furnace body connected to the jacket layer of the carbonization furnace is additionally provided above the horizontal furnace body, which can prolong the residence time of the flue gas in the secondary combustion chamber, is conducive to the full combustion of the hot flue gas, and can ensure the heating effect of the sludge in the carbonization furnace cylinder;

[0016] 2. In the utility model, an open baffle is designed in the vertical furnace body. The baffle can reduce the hot flue gas flow rate, which is conducive to dust sedimentation. It can reduce the dust content carried in the hot flue gas entering the carbonization furnace, and can solve the serious problem of dust accumulation in the carbonization furnace jacket. At the same time, the dust is settled into the horizontal furnace body, which is also convenient for cleaning the accumulated dust, thereby improving the thermal utilization efficiency of the system and ensuring the safe and stable operation of the carbonization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front planar structure of the present utility model;

[0018] Figure 2 This is a schematic diagram of the top plan structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the overall planar structure of the utility model as viewed from the burner connection interface side;

[0020] Figure 4 It is a schematic diagram of the overall planar structure of the utility model as viewed from one side of the peephole.

[0021] Markings in the figure: 1-horizontal furnace body, 2-vertical furnace body, 3-support base, 4-baffle, 41-through hole, 5-burner connection interface, 6-peephole, 7-pyrolysis gas recycling port, 8-air distribution port, 9-ash cleaning port, 10-electric air valve, 11-inspection door. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Reference Figure 1-4 A carbonization secondary combustion chamber structure includes a horizontal furnace body 1 and a vertical furnace body 2. The vertical furnace body 2 is arranged in the middle of the top of the horizontal furnace body 1 and is connected to the horizontal furnace body 1. An additional vertical furnace body 2 connected to the carbonization furnace jacket layer (not shown in the figure) is added above the horizontal furnace body 1. The residence time of the flue gas in the secondary combustion chamber can be prolonged, which is conducive to the full combustion of the hot flue gas and can ensure the heating effect of the sludge in the carbonization furnace cylinder.

[0024] Furthermore, the interior of the vertical furnace body 2 is symmetrically provided with an upwardly inclined baffle 4, and a plurality of through holes 41 are evenly opened on the baffle 4. The baffle 4 and the vertical furnace body 2 form a flue gas channel smaller than the inner diameter of the vertical furnace body 2. The top of the vertical furnace body 2 is connected to the jacket layer of the external carbonization furnace. The open baffle 41 can reduce the flow rate of the hot flue gas discharged into the jacket layer of the carbonization furnace, ensuring that the gas velocity is 3 to 7 m / s, which is conducive to dust sedimentation, can reduce the dust content carried in the hot flue gas entering the carbonization furnace, and can solve the problem of serious dust accumulation in the jacket of the carbonization furnace.

[0025] The designed flue gas passage and through hole 41 will not affect the discharge of hot flue gas into the jacket layer of the carbonization furnace.

[0026] Furthermore, a plurality of air distribution ports 8 are provided on the side of the horizontal furnace body 1, and a one-way valve for one-way air intake from outside to inside is accommodated inside the air distribution port 8. The air distribution port 8 can be used to replenish air to increase the system flue gas volume and improve the humidity carrying capacity of the carbonization system.

[0027] In addition, in order to ensure the air distribution capacity, an additional fan can be added at the air distribution port 8.

[0028] Furthermore, a support base 3 is welded to the bottom end of the horizontal furnace body 1 .

[0029] Furthermore, a pyrolysis gas recycling port 7 is provided on the side of the horizontal furnace body 1, and the pyrolysis gas recycling port 7 is connected to the inner tube of the external carbonization furnace through a pipeline. When in use, the pyrolysis gas generated by the carbonization of sludge in the inner tube of the carbonization furnace can be introduced into the carbonization secondary combustion chamber through the pipeline for combustion, which can make full use of the calorific value of the pyrolysis gas and reduce the consumption of heat source of the carbonization system.

[0030] Among them, insulated and heated pipes are preferred to reduce heat loss, but this is not limited here. In addition, exhaust equipment can be added to the pipes.

[0031] Furthermore, a ash cleaning port 9 is provided at the lower side of the horizontal furnace body 1, and a ash cleaning cover is hinged on the ash cleaning port 9. The ash accumulated in the carbonization secondary combustion chamber can be cleaned regularly through the ash cleaning port 9, thereby improving the thermal utilization efficiency of the system and ensuring the safe and stable operation of the carbonization system.

[0032] There may be multiple ash cleaning ports 9 arranged along the length direction of the horizontal furnace body 1 .

[0033] Furthermore, a burner connection interface 5 is provided on one end wall of the horizontal furnace body 1, and the burner connection interface 5 is connected to an external carbonization burner through a pipeline. The carbonization burner (not shown in the figure) and the carbonization secondary combustion chamber can be connected through the pipeline, and the hot flue gas generated by combustion can be discharged into the interior of the horizontal furnace body 1.

[0034] The number of the pyrolysis gas recycling ports 7 is preferably two, but not limited to two.

[0035] Furthermore, a peephole 6 and an inspection door 11 are provided at the other end of the horizontal furnace body 1. A peephole 6 is provided inside the peephole 6. The peephole 6 allows the staff to monitor the internal working status of the carbonization secondary combustion chamber in real time to ensure the safety of the overall operation. At the same time, the inspection door 11 allows the staff to enter the carbonization secondary combustion chamber for inspection and maintenance during shutdown and maintenance.

[0036] Furthermore, an electric air valve 10 is provided on the other side of the horizontal furnace body 1 and is connected thereto. The electric air valve 10 can discharge the hot flue gas from the secondary combustion chamber urgently under special working conditions to ensure the safety of the overall use.

[0037] In summary, the use of T-shaped carbonization secondary combustion chamber structure and the design of perforated baffle can solve the problems of ash accumulation in the carbonization furnace and uneven heat radiation in the vertical secondary combustion chamber, and is worthy of promotion.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A carbonization secondary combustion chamber structure, characterized in that: It includes a horizontal furnace body and a vertical furnace body. The vertical furnace body is arranged in the middle of the top of the horizontal furnace body and is connected to the horizontal furnace body. The interior of the vertical furnace body is symmetrically provided with upward inclined baffles, and a plurality of through holes are evenly opened on the baffles. The baffles and the vertical furnace body together form a flue gas channel smaller than the inner diameter of the vertical furnace body. The top of the vertical furnace body is connected to the jacket layer of the external carbonization furnace.

2. A carbonization secondary combustion chamber structure according to claim 1, characterized in that: A plurality of air distribution ports are provided on the side of the horizontal furnace body, and a one-way valve for one-way air intake from outside to inside is accommodated inside the air distribution port.

3. The carbonization secondary combustion chamber structure according to claim 1, characterized in that: A pyrolysis gas recycling port is provided on the side of the horizontal furnace body, and the pyrolysis gas recycling port is connected to the inner cylinder of the external carbonization furnace through a pipeline.

4. The carbonization secondary combustion chamber structure according to claim 1, characterized in that: An ash cleaning port is further provided at the lower side of the horizontal furnace body, and an ash cleaning cover is hingedly connected to the ash cleaning port via a hinge.

5. The carbonization secondary combustion chamber structure according to claim 1, characterized in that: A burner connection interface is provided on one end wall of the horizontal furnace body, and the burner connection interface is connected to an external carbonization burner through a pipeline.

6. The carbonization secondary combustion chamber structure according to claim 1, characterized in that: The other end of the horizontal furnace body is further provided with a peephole and an inspection door, and a peep mirror is provided inside the peephole.

7. The carbonization secondary combustion chamber structure according to claim 1, characterized in that: The other side of the horizontal furnace body is also provided with an electric air valve connected thereto.

8. The carbonization secondary combustion chamber structure according to claim 1, characterized in that: A supporting base is welded to the bottom end of the horizontal furnace body.

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