Smoldering furnace and oily sludge treatment device containing the smoldering furnace

Abstract

The present invention belongs to the technical field of heat treatment of solid waste, and particularly relates to a smoldering furnace and an oily sludge treatment device containing the smoldering furnace. The smoldering furnace of the present invention comprises a furnace body (1), the furnace body (1) is provided with an air inlet (11) and an air outlet (12), a gas distributor (2) and an igniter (3) are provided in the furnace body (1), an air outlet (21) is provided on the gas distributor (2), the air inlet (11) is connected to the gas distributor (2), the air inlet (11) and the gas distributor (2) are located at the top of the furnace body (1), the air outlet (12) is located at the bottom of the furnace body (1), the air outlet (21) of the gas distributor (2) is arranged downward so that the gas entering the furnace body (1) from the outside moves from top to bottom, and the number of igniters (3) is at least one. The present invention can improve the smoldering treatment efficiency of solid waste, and is particularly suitable for the treatment of oily sludge.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal treatment of solid wastes, and in particular relates to a smoldering furnace and an oily sludge treatment device containing the smoldering furnace. Background Art

[0002] The smoldering technology uses organic pollutants with high calorific value as energy, injects air into the contaminated soil layer, ignites the pollutants in a low-energy state, causes chronic self-sustaining combustion, and then uses the combustion heat of the pollutants themselves to trigger continuous combustion in the surrounding polluted area. Under the condition of maintaining air supply, the combustion can be sustained and spread to the entire polluted area, and the combustion and temperature are controlled by air. The smoldering technology has been widely used in the treatment of solid waste. Chinese patent document CN107842855 A discloses a self-sustaining smoldering treatment platform system and treatment method for urban solid waste, which includes a reactor, a compressed gas cylinder for supplying gas to the reactor, a thermocouple for measuring data in the reactor, an ignition controller, a data acquisition device, a smoke exhaust device above the reactor, a flue gas analyzer, a self-sustaining smoldering treatment control software system and a host. Chinese patent document CN 207661794 U discloses a smoldering furnace for circulating treatment of oily sludge, comprising a plurality of smoldering furnace bodies arranged side by side, each smoldering furnace body being provided with a gas distributor at the bottom of the inner side, the inlet end of the gas distributor being connected with an air inlet pipe for providing gas of suitable temperature and pressure, the upper side of the gas distributor being a space for accommodating oily sludge, and the top of each smoldering furnace body being provided with a steam recovery cover. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and provide a smoldering furnace and an oily sludge treatment device containing the smoldering furnace to improve the smoldering treatment efficiency of solid wastes such as oily sludge.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows:

[0005] A smoldering furnace comprises a furnace body, which is provided with an air inlet and an air outlet. A gas distributor and an igniter are provided in the furnace body. The gas distributor is provided with an air outlet hole. The air inlet is connected with the gas distributor. The air inlet and the gas distributor are located at the top of the furnace body, and the air outlet is located at the bottom of the furnace body. The air outlet hole of the gas distributor is arranged downward so that the gas entering the furnace body from the outside moves from top to bottom. The number of igniters is at least 1.

[0006] The technical effects of this solution are as follows: (1) When solid waste is accumulated in the smoldering furnace, the solid waste at the bottom will be pressed more tightly, while the solid waste at the top will be relatively loose, so it is easier for gas to penetrate the solid waste at the top. Therefore, allowing smoldering to develop from top to bottom in the smoldering furnace is conducive to the progress and continuous diffusion of smoldering; (2) The gas generated by smoldering has a relatively high combustion value. In the prior art, it is guided to move upward and lead out of the smoldering furnace. In this solution, the gas outlet of the gas distributor is arranged downward so that the gas entering the furnace body from the outside moves from top to bottom, which can make the gas generated by smoldering diffuse downward and participate in the smoldering of the solid waste below, so that the gas generated by smoldering can be fully utilized; (3) The gas generated by smoldering tends to move upward, while the gas coming out of the gas distributor moves downward. The collision of the two gases is conducive to the lateral diffusion of the gas, which is conducive to improving the uniformity of the gas in the solid waste and also conducive to quickly diffusing the smoldering to the surrounding materials.

[0007] As an improvement, the gas distributor includes a branch pipe joint and a bronchus arranged around the branch pipe joint, and the gas outlet is located on the bronchus.

[0008] As an improvement, the number of the igniters is 3, which are respectively located at the upper part, the middle part and the lower part of the furnace body. When the smoldering develops to the middle part or the lower part of the furnace body, the igniter located at the middle part or the lower part ignites when necessary, which can strengthen the smoldering.

[0009] As a further improvement, a temperature sensing and control system is provided in the furnace body, which can adjust the air intake volume of the air inlet according to the temperature in the furnace.

[0010] The oily sludge treatment device provided by the present invention, which includes the smoldering furnace, also includes a blower and an exhaust gas processor, wherein the blower is connected to the air inlet, and the exhaust gas processor is connected to the air outlet. The smoldering furnace is suitable for treating oily sludge, which has a relatively high humidity and is more compact between the upper and lower layers than other solid wastes. Allowing smoldering to occur from top to bottom is beneficial to improving its treatment efficiency.

[0011] As an improvement, a heater is provided between the blower and the air inlet.

[0012] As an improvement, the exhaust gas processor includes a multi-media filter and an activated carbon filter.

[0013] In summary, the present invention has the advantages of reasonable structure and obvious effect. By only changing the position of the gas distributor, the smoldering treatment efficiency of solid waste is improved, and it is particularly suitable for the treatment of oily sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the gas distributor of the present invention.

[0016] In the figure: 1. furnace body; 11. air inlet; 12. air outlet; 2. gas distributor; 21. air outlet; 22. branch pipe joint; 23. bronchial pipe; 3. igniter; 4. temperature sensor control system; 5. blower; 6. exhaust gas processor; 61. multi-media filter; 62. activated carbon filter; 7. heater. DETAILED DESCRIPTION

[0017] Example 1

[0018] like Figure 1 As shown, the smoldering furnace of the present invention comprises a furnace body 1, an air inlet 11 and an air outlet 12 are arranged on the furnace body 1, a gas distributor 2 and an igniter 3 are arranged in the furnace body 1, an air outlet 21 is opened on the gas distributor 2, the air inlet 11 is connected with the gas distributor 2, the air inlet 11 and the gas distributor 2 are located at the top of the furnace body 1, and the air outlet 12 is located at the bottom of the furnace body 1, and the air outlet 21 of the gas distributor 2 is arranged downward so that the gas entering the furnace body 1 from the outside moves from top to bottom, and the number of igniters 3 is at least 1. In this embodiment, the number of igniters 3 is 3, which are respectively located in the upper part, the middle part and the lower part of the furnace body 1. A temperature sensing control system 4 is arranged in the furnace body 1, which can adjust the air intake of the air inlet 11 according to the temperature in the furnace.

[0019] like Figure 2 As shown, the gas distributor 2 includes a branch pipe joint 22 and a bronchial tube 23 arranged around the branch pipe joint 22 , and the gas outlet 21 is located on the bronchial tube 23 .

[0020] like Figure 1 As shown, the oily sludge treatment device including the smoldering furnace further includes a blower 5 and an exhaust gas processor 6, the blower 5 is connected to the air inlet 11, and the exhaust gas processor 6 is connected to the air outlet 12. The exhaust gas processor 6 includes a multi-media filter 61 and an activated carbon filter 62. A heater 7 is provided between the blower 5 and the air inlet 11.

Claims

1. A smoldering furnace, comprising a furnace body (1), the furnace body (1) being provided with an air inlet (11) and an air outlet (12), a gas distributor (2) and an igniter (3) being provided in the furnace body (1), the gas distributor (2) being provided with an air outlet hole (21), the air inlet (11) being in communication with the gas distributor (2), characterized in that: The air inlet (11) and the gas distributor (2) are located at the top of the furnace body (1), and the air outlet (12) is located at the bottom of the furnace body (1). At least one igniter (3) is arranged at the upper part of the furnace body (1) so that smoldering in the smoldering furnace proceeds from top to bottom. The air outlet (21) of the gas distributor (2) is arranged downward so that the gas entering the furnace body (1) from the outside moves from top to bottom, so that it can collide with the gas generated by the smoldering and having a tendency to move upward.

2. The smoldering stove according to claim 1, characterized in that: The gas distributor (2) comprises a branch pipe joint (22) and a bronchus (23) arranged around the branch pipe joint (22), and the gas outlet hole (21) is located on the bronchus (23).

3. The smoldering stove according to claim 1, characterized in that: The furnace body (1) is provided with a temperature sensing and regulating system (4) capable of regulating the air intake volume of the air inlet (11) according to the temperature inside the furnace.

4. An oily sludge treatment device comprising a smoldering furnace as claimed in claim 1, characterized in that: The oily sludge treatment device further comprises an air blower (5) and an exhaust gas processor (6); the air blower (5) is connected to the air inlet (11), and the exhaust gas processor (6) is connected to the air outlet (12).

5. The oily sludge treatment device according to claim 4, characterized in that: A heater (7) is provided between the air blower (5) and the air inlet (11).

6. The oily sludge treatment device according to claim 4, characterized in that: The exhaust gas processor (6) comprises a multi-media filter (61) and an activated carbon filter (62).

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