Environmentally friendly lamp holder brick

Abstract

The present invention relates to an environmentally friendly lamp holder brick, wherein a gas channel is arranged in the middle of the lamp holder brick, and a plurality of small waste gas channels are arranged on the periphery of the gas channel; one end of the small waste gas channel is connected to the gas channel, and the other end passes through the lamp holder brick, and the outer end opening of the small waste gas channel is a waste gas suction port, the inner end opening is a waste gas outlet, the bottom end opening of the gas channel is a gas inlet, and the top end opening is a mixed gas outlet. The present invention arranges a small waste gas channel on the lamp holder brick, and the negative pressure generated when the coke oven gas passes through the gas channel can inhale the waste gas around the lamp holder brick, and the waste gas is mixed with the coke oven gas and enters the vertical fire channel from the mixed gas outlet, that is, the waste gas and the coke oven gas are mixed in advance in the lamp holder brick, thereby further reducing the generation of nitrogen oxides.

Description

Technical Field

[0001] The invention relates to the technical field of coke ovens, and in particular to an environmentally friendly lamp holder brick. Background Art

[0002] The coke oven is composed of a heat storage chamber, a ramp, a combustion chamber, a carbonization chamber and a furnace roof. The gas and air are mixed and burned in the combustion chamber, and the heat is transferred to the coal in the carbonization chamber by heat conduction and heat radiation, so that the coal is converted into coke. The thermal system of the coke oven includes the adjustment of the longitudinal heating temperature and the high-direction heating temperature, and the uniform temperature distribution of the carbonization chamber furnace wall, which can not only save fuel, but also prevent the coke oven body from being damaged due to local overheating.

[0003] The combustion chamber is composed of multiple vertical fire channels. When coke oven gas is used for heating, the coke oven gas outlet pipe brick at the bottom of the vertical fire channel is called a lamp head brick (or burner brick). The function of the lamp head brick is to ensure the reasonable combustion of gas and to heat the coke cake evenly in the vertical direction. Coke oven gas is ejected from the gas outlet on the lamp head brick and mixed with the air coming out of the inclined channel to burn violently. Due to the high flame temperature, the nitrogen in the air undergoes a chemical reaction, which easily produces nitrogen oxides that pollute the environment.

[0004] In the furnace structure of the traditional coke oven, an exhaust gas circulation hole is set at the bottom of the vertical fire channel, and the exhaust gas circulation method is used to reduce the generation of nitrogen oxides. Its working principle is: after the coke oven gas is ejected at high speed from the gas outlet on the lamp holder brick, the pressure around the lamp holder brick decreases, and the bottom pressure of the rising air flow vertical fire channel is lower than the bottom pressure of the descending air flow vertical fire channel, so that the exhaust gas in the descending air flow vertical fire channel is returned to the rising air flow vertical fire channel, diluting the coke oven gas concentration, reducing the intensity of gas combustion, and reducing the flame temperature, thereby reducing the generation of nitrogen oxides. However, due to the fast ejection speed of coke oven gas and the delay of exhaust gas return, the amount of nitrogen oxides generated during the combustion process is still large; if the mixing of coke oven gas and exhaust gas can occur earlier, the generation of nitrogen oxides can be further reduced, and the environmental protection of the coke oven can be improved. Summary of the invention

[0005] The present invention provides an environmentally friendly lamp holder brick. By arranging a small exhaust gas channel on the lamp holder brick, the negative pressure generated when the coke oven gas passes through the gas channel can suck the exhaust gas around the lamp holder brick. After the exhaust gas is mixed with the coke oven gas, the exhaust gas enters the vertical fire channel from the mixed gas outlet, that is, the exhaust gas and the coke oven gas are mixed in advance in the lamp holder brick, thereby further reducing the generation of nitrogen oxides.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An environmentally friendly lamp holder brick comprises a lamp holder brick; a gas channel is arranged in the middle of the lamp holder brick, and a plurality of small waste gas channels are arranged on the periphery of the gas channel; one end of the small waste gas channel is connected with the gas channel, and the other end passes through the lamp holder brick, and the outer end opening of the small waste gas channel is a waste gas suction port, and the inner end opening is a waste gas outlet, the bottom end opening of the gas channel is a gas inlet, and the top end opening is a mixed gas outlet.

[0008] The diameter of the small waste gas passage is smaller than the diameter of the coal gas passage.

[0009] A plurality of small exhaust gas passages are evenly arranged along the circumference of the coal gas passage.

[0010] The small exhaust gas passages are arranged in one or more layers along the height direction, and the small exhaust gas passages in different layers are arranged correspondingly at the same circumferential position, or are arranged staggered along the circumferential direction.

[0011] The small exhaust gas channel is arranged obliquely, and the inner end opening is higher than the outer end opening.

[0012] The inclination angle of the small exhaust gas channel is 30° to 60°.

[0013] The number of the coal gas inlet is one, and the number of the mixed gas outlet is one or more.

[0014] The lamp holder brick is manufactured by 3D printing.

[0015] The lamp holder brick is a cylindrical structure; the gas channel is a channel with a circular cross section or a polygonal cross section; and the small exhaust gas channel is a channel with a circular cross section or a polygonal cross section.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1) The exhaust gas is sucked in through the small exhaust gas channel on the lamp holder brick and mixed with the coke oven gas in advance, which can dilute the fuel concentration, thereby weakening the combustion and reducing the temperature at the bottom of the vertical fire channel, which is beneficial to improving the uniformity of the high-direction heating of the coke oven, reducing the amount of nitrogen oxides generated, and achieving the purpose of source emission reduction, with good economic and environmental benefits;

[0018] 2) The lamp holder brick has a simple structure and is easy to build, without affecting the existing coke oven body structure;

[0019] 3) It can be used in newly built coke ovens or in the renovation of existing coke ovens. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of an environmentally friendly lamp holder brick according to the present invention.

[0021] Figure 2 yes Figure 1 Top view of the .

[0022] Figure 3 The invention discloses a schematic diagram of the structure of a coke oven body including the environmentally friendly lamp holder bricks described in the invention.

[0023] In the figure: 1. Lamp head brick 11. Gas channel 12. Small exhaust gas channel 2. Carbonization chamber bottom 3. Exhaust gas circulation hole 4. Inclined channel area 5. Vertical fire channel 6. Combustion chamber wall 7. Gas pipe brick DETAILED DESCRIPTION

[0024] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0025] like Figure 1 , Figure 2 As shown, an environmentally friendly lamp holder brick described in the present invention includes a lamp holder brick 1; a gas channel 11 is arranged in the middle of the lamp holder brick 1, and a plurality of small exhaust gas channels 12 are arranged around the gas channel 11; one end of the small exhaust gas channel 12 is connected to the gas channel 11, and the other end passes through the lamp holder brick 1, and the outer end opening of the small exhaust gas channel 12 is a waste gas suction port, and the inner end opening is a waste gas outlet; the bottom end opening of the gas channel 11 is a gas inlet, and the top end opening is a mixed gas outlet.

[0026] The diameter of the small exhaust gas passage 12 is smaller than the diameter of the coal gas passage 11 .

[0027] A plurality of small exhaust gas passages 12 are evenly arranged along the circumference of the coal gas passage 11 .

[0028] The exhaust gas small channels 12 are arranged in one or more layers along the height direction, and the exhaust gas small channels 12 in different layers are arranged correspondingly at the same circumferential position, or are arranged staggered along the circumferential direction.

[0029] The small exhaust gas channel 12 is arranged obliquely, and the inner end opening is higher than the outer end opening.

[0030] The inclination angle of the small exhaust gas channel 12 is 30° to 60°.

[0031] The number of the coal gas inlet is one, and the number of the mixed gas outlet is one or more.

[0032] The lamp holder brick 1 is manufactured by 3D printing.

[0033] The lamp holder brick 1 is a cylindrical structure; the gas channel 11 is a channel with a circular cross section or a polygonal cross section; the small exhaust gas channel 12 is a channel with a circular cross section or a polygonal cross section.

[0034] The following embodiments are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0035] [Example]

[0036] In this embodiment, an environmentally friendly lamp holder brick is arranged at the bottom of the vertical fire channel 5, and the overall structure is cylindrical.

[0037] A gas passage 11 is vertically opened at the center of the lamp holder brick 1. The bottom opening of the gas passage 11 is a gas inlet, and the top opening is a mixed gas outlet. The cross section of the gas passage 11 is circular.

[0038] Two layers of small exhaust gas channels 12 are circumferentially opened on the lamp holder brick 1 outside the gas channel 11, each layer of small exhaust gas channels consists of 8 small exhaust gas channels evenly arranged along the circumference, and the two layers of small exhaust gas channels are arranged one by one along the circumference, and each small exhaust gas channel 12 is inclined, with an angle of 45° with the horizontal plane.

[0039] The outer end opening of the small waste gas channel 12 is a waste gas suction port, and the inner end opening is a waste gas outlet, and the waste gas outlets are respectively connected to the coal gas channel 11.

[0040] In this embodiment, the diameter of the coal gas channel 11 is 120 mm, and the diameter of the small waste gas channel 12 is 15 mm.

[0041] like Figure 3 As shown, the two sides of the vertical fire channel 5 are separated from the adjacent carbonization chamber by the combustion chamber wall 6, and the bottom surface of the vertical fire channel 5 is flush with the bottom surface 2 of the carbonization chamber. The bottom of the vertical fire channel 5 is connected to the heat storage chamber below through the ramp area 4, and the bottom of the vertical fire channel 5 is provided with an exhaust gas circulation hole 3 and a lamp holder brick 1.

[0042] In the process of introducing coke oven gas into the vertical fire channel 5 through the gas channel 11 on the lamp holder brick 1, negative pressure is generated to suck the exhaust gas near the lamp holder brick 1 through the small exhaust gas channel 12. The exhaust gas is mixed with the coke oven gas in the gas channel 11 in advance to dilute the concentration of the coke oven gas, which is not only beneficial to lengthen the flame in the vertical fire channel 5 and improve the uniformity of high-direction heating of the coke oven, but also beneficial to reduce the flame temperature and reduce the generation of nitrogen oxides.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An environmentally friendly lamp holder brick, comprising a lamp holder brick; characterized in that: A gas channel is arranged in the middle of the lamp holder brick, and a plurality of small exhaust gas channels are arranged around the gas channel; one end of the small exhaust gas channel is connected with the gas channel, and the other end passes through the lamp holder brick, and the outer end opening of the small exhaust gas channel is an exhaust gas suction port, and the inner end opening is an exhaust gas outlet, the bottom end opening of the gas channel is a gas inlet, and the top end opening is a mixed gas outlet.

2. The environmentally friendly lamp holder brick according to claim 1, characterized in that: The diameter of the small waste gas passage is smaller than the diameter of the coal gas passage.

3. The environmentally friendly lamp holder brick according to claim 1, characterized in that: A plurality of small exhaust gas passages are evenly arranged along the circumference of the coal gas passage.

4. The environmentally friendly lamp holder brick according to claim 1, characterized in that: The small exhaust gas passages are arranged in one or more layers along the height direction, and the small exhaust gas passages in different layers are arranged correspondingly at the same circumferential position, or are arranged staggered along the circumferential direction.

5. An environmentally friendly lamp holder brick according to claim 1 or 2 or 3 or 4, characterized in that: The small exhaust gas channel is arranged obliquely, and the inner end opening is higher than the outer end opening.

6. The environmentally friendly lamp holder brick according to claim 5, characterized in that: The inclination angle of the small exhaust gas channel is 30° to 60°.

7. The environmentally friendly lamp holder brick according to claim 1, characterized in that: The number of the coal gas inlet is one, and the number of the mixed gas outlet is one or more.

8. The environmentally friendly lamp holder brick according to claim 1, characterized in that: The lamp holder brick is manufactured by 3D printing.

9. The environmentally friendly lamp holder brick according to claim 1, characterized in that: The lamp holder brick is a cylindrical structure; the gas channel is a channel with a circular cross section or a polygonal cross section; and the small exhaust gas channel is a channel with a circular cross section or a polygonal cross section.

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