A high-efficiency coke oven gas desulfurization device and system

Abstract

The present application discloses a high-efficiency coke oven gas desulfurization device and its system, the desulfurization device comprises a horizontally placed cylinder, with a left end cover and a right end cover respectively provided on both sides of the cylinder; the left end cover is connected to the sealing cover, and the right end cover is connected to the right side wall of the cylinder; a support shaft is provided between the left end cover and the sealing cover, and the left side of the support shaft extends out of the left end cover; the right end cover is connected to an intermittent exhaust fork through a bearing; the intermittent exhaust fork comprises a first arc surface at the upper part and a second arc surface at the lower part in the cylinder; an exhaust pipe extending to the inside of the cylinder is provided inside the intermittent exhaust fork, and a planetary gear is provided between the exhaust pipe and the intermittent exhaust fork; strip exhaust holes parallel to the axis of the cylinder are provided on the top of the cylinder; the present application is suitable for the mixed desulfurization operation of coke oven gas and coal, which improves the desulfurization efficiency and reduces the desulfurization cost.

Description

Technical Field

[0001] The invention relates to the field of industrial desulfurization, and in particular to a high-efficiency coke oven gas desulfurization device and a system thereof. Background Art

[0002] In the existing coal product production industry, coking coal will form coke oven gas after high-temperature dry distillation in the coking oven. It is a combustible coking by-product with great potential application value. Among them, coking gas is a toxic and explosive gas, which contains a large amount of sulfide. At the same time, the mined coal, if directly burned without any treatment, will also cause a large amount of SO2 emissions, causing serious pollution to the environment. In addition, the state stipulates that coal with a sulfur content of more than 1.2% is not allowed to enter the urban area. Therefore, it is urgent to develop an efficient coke oven gas desulfurization device and system.

[0003] High-temperature desulfurization and microwave desulfurization are new physical desulfurization methods in recent years; among chemical desulfurization methods, foam desulfurization and spray tower desulfurization are desulfurization process solutions disclosed by the prior art and widely used. However, the existing physical desulfurization methods are all single desulfurization mechanisms, and there is no reasonable and efficient system to integrate the physical desulfurization methods so that the physical desulfurization methods can cooperate with each other to improve the physical desulfurization efficiency. Secondly, in the chemical desulfurization method, whether it is the spray tower desulfurization scheme or the foam desulfurization scheme, there are problems such as short contact time between sulfur-containing gas and chemical fluid and low chemical reaction efficiency. This makes it necessary to set up multiple groups of spray towers and reduction towers in the system in order to ensure that the desulfurization effect can meet the emission and product requirements in the existing technical scheme. Similarly, the efficient coordination of physical desulfurization methods and chemical desulfurization also requires further research. In addition, there is no prior art to refer to for the merger of coal desulfurization and coke oven gas desulfurization processes. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of this application is to provide a high-efficiency coke oven gas desulfurization device and system thereof, which is suitable for the combined desulfurization operation of coal and coke oven gas, improves the desulfurization efficiency and reduces the desulfurization cost.

[0005] To achieve this goal, the technical solution adopted in this application is as follows:

[0006] A high-efficiency coke oven gas desulfurization device comprises a horizontally placed cylindrical barrel, wherein the sealing cover is arranged on the left side of the barrel, and the barrel and the sealing cover are detachably connected; a left end cover and a right end cover are arranged on both sides of the barrel respectively.

[0007] Among them, the left end cover is connected to the sealing cover, and the right end cover is connected to the right side wall of the cylinder; a support shaft is arranged between the left end cover and the sealing cover, and the left side of the support shaft extends out of the outside of the left end cover; the right end cover is connected to an intermittent exhaust fork through a bearing, and the purpose of the intermittent exhaust fork is to intermittently discharge the desulfurized gas and cooperate with the first and second stirring teeth to achieve stirring of the mixed fluid; the intermittent exhaust fork includes a first arc surface on the upper part and a second arc surface on the lower part in the cylinder; an exhaust pipe extending to the inside of the cylinder is arranged inside the intermittent exhaust fork, and a planetary gear is arranged between the exhaust pipe and the intermittent exhaust fork.

[0008] The top of the cylinder is provided with strip exhaust holes parallel to the axis of the cylinder; the bottom of the cylinder is provided with a threaded hole, the threaded hole is connected to the drain pipe joint, and the bottom of the drain pipe joint is connected to the drain pipe; a foam desulfurization agent injection pipeline is provided on the left side of the top of the cylinder; a liquid level detector is provided in the upper and middle part of the sealing cover; the liquid level is detected by the liquid level detector, and the above information is transmitted to the control mechanism, such as PLC, and the control mechanism sends a control signal to the desulfurization agent injection mechanism and the valve body on the drain pipe to control the dynamic maintenance of the foam desulfurization agent within a certain range. In addition, the control mechanism can also control the timed replacement of the foam wood desulfurization agent according to the concentration sensor or time signal; the cylinder, exhaust pipe and support shaft are coaxially arranged; a rotation drive mechanism (not shown in the figure) is connected to the right side of the exhaust pipe or the intermittent exhaust fork, and the rotation drive mechanism is preferably a servo motor that can realize fixed-angle rotation.

[0009] Preferably, a plurality of groups of evenly distributed first stirring teeth are arranged at the upper part of the exhaust pipe, and a plurality of groups of evenly distributed second stirring teeth are arranged at the lower part of the exhaust pipe, and the length of the first stirring teeth is greater than that of the second stirring teeth; the smaller second stirring teeth can increase the distance between them and the second arc surface, reducing the risks of collision and turbulence; a plurality of groups of evenly distributed exhaust holes are arranged at the lower part of the exhaust pipe, and the contact distance between the gas and the desulfurizer is increased through the exhaust holes arranged at the lower part.

[0010] Preferably, the left side of the planetary gear abuts against the gear baffle plate, and the right side abuts against the inner step surface of the intermittent exhaust fork; and a shaft sealing structure is provided between the gear baffle plate and the exhaust pipe.

[0011] Preferably, the top of the first curved surface fits into the inner wall of the cylinder, and the first curved surface is provided with a groove capable of covering all the strip-shaped exhaust holes, and a sealing strip is provided on the outer periphery of the groove; there is a fluid flow gap between the bottom of the second curved surface and the inner wall of the cylinder, and a third stirring tooth is provided on the top.

[0012] A mechanical sealing structure is arranged between the sealing cover and the support shaft, and a combined sealing ring is arranged between the left end cover and the support shaft; a shaft sleeve is arranged outside the intermittent exhaust fork, and the right side wall of the cylinder and the mechanical sealing structure are arranged outside the shaft sleeve in sequence from left to right, and a sealing ring and a bearing are arranged between the right end cover and the intermittent exhaust fork in sequence from left to right.

[0013] The support shaft and the intermittent exhaust fork are respectively connected to the ground through a support base.

[0014] The purpose of the present application is also to provide a high-efficiency coke oven gas desulfurization system, including a coking coal crushing device, a grinding device, a magnetic separation device, an ultrasonic oscillation and conveying device, a flue gas conveying device, a tar collection device, a gas collecting hood, a desulfurization device, a reduction tower and a chimney; characterized in that: the coking coal crushing device, the grinding device, the magnetic separation device, the ultrasonic oscillation and conveying device, the gas collecting hood, the desulfurization device, the reduction tower and the chimney are connected in sequence, the flue gas conveying device and the tar collection device are connected to one side of the ultrasonic oscillation and conveying device, the dust collecting hood is arranged on the upper part of the ultrasonic oscillation and conveying device, and a fluid circulation path is arranged between the desulfurization device and the reduction tower.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. For the desulfurization device, taking the connection between the exhaust pipe and the rotary drive mechanism as an example, the exhaust pipe 6 is driven by the rotary drive mechanism on the right side to swing within a certain angle range, so that the first and second stirring teeth can fully stir and mix the foam desulfurizer and the sulfur-containing gas, thereby improving the reaction efficiency; at the same time, the driving mechanism drives the intermittent exhaust fork 5 to swing in the opposite direction of the exhaust pipe 6 through the planetary gear 7; this makes the first and second stirring teeth and the third stirring tooth of the second arc surface 5.2 swing in the opposite direction, thereby increasing the mixing effect of the foam desulfurizer and the sulfur-containing gas, and further improving the reaction efficiency.

[0017] 2. During the swinging process of the intermittent exhaust fork 5, the first arc surface 5.1 realizes the intermittent opening and closing of the strip exhaust hole 8, that is, an intermittent closed reaction space is formed in the cylinder 1, which slows down the gas overflow rate, increases the desulfurization reaction time, and improves the desulfurization efficiency per unit space and time.

[0018] 3. The coal body is crushed into large pieces of coal, and then ground into small particles of coal. The above two steps, which are performed separately, reduce the pressure, material and other requirements of the coal crushing mechanism, reduce costs and increase service life; after the above two steps, the overflow ratio of sulfides in the coal body is increased; then, preliminary desulfurization is carried out through a magnetic separation desulfurization process, and then the sulfur element contained in the filtered coke oven gas is mixed with the sulfur element in the coal body, and then transported to the desulfurization device and the reduction tower through the gas collecting hood for desulfurization operation; in summary, the desulfurization system of the present application has a compact process flow, a small footprint and a high desulfurization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 A plan cross-sectional view of the desulfurization device provided in Example 1;

[0021] Figure 2 for Figure 1 A partial enlarged view of part A of the desulfurization device shown;

[0022] Figure 3 It is a partial enlarged view of the intermittent exhaust fork;

[0023] Figure 4 A schematic diagram of the desulfurization system structure provided in Example 3; DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1: Figure 1-3 As shown, a high-efficiency coke oven gas desulfurization device comprises a horizontally placed cylindrical body 1, wherein the sealing cover 2 is arranged on the left side of the body 1; and a left end cover 3 and a right end cover 4 are arranged on both sides of the body 1 respectively.

[0026] Among them, the left end cover 3 is connected to the sealing cover 2, and the right end cover 4 is connected to the right side wall of the cylinder 1; a support shaft 12 is arranged between the left end cover 3 and the sealing cover 2, and the left side of the support shaft 12 extends out of the outside of the left end cover 3; the right end cover 4 is connected to an intermittent exhaust fork 5 through a bearing 18; the intermittent exhaust fork 5 includes an upper first arc surface 5.1 and a lower second arc surface 5.2 in the cylinder 1; an exhaust pipe 6 extending to the inside of the cylinder 1 is arranged inside the intermittent exhaust fork 5, and a planetary gear 7 is arranged between the exhaust pipe 6 and the intermittent exhaust fork 5.

[0027] The top of the cylinder 1 is provided with a strip exhaust hole 8 distributed parallel to the axis of the cylinder 1; the bottom of the cylinder 1 is provided with a threaded hole 9, the threaded hole 9 is connected to the drain pipe joint, and the bottom of the drain pipe joint is connected to the drain pipe; a foam desulfurization agent injection pipeline 10 is provided on the left side of the top of the cylinder 1; a liquid level detector 11 is provided in the upper and middle part of the sealing cover 2; the cylinder 1, the exhaust pipe 6 and the support shaft 12 are coaxially arranged; a rotation drive mechanism (not shown in the figure) is connected to the right side of the exhaust pipe 6 or the intermittent exhaust fork 5, and the rotation drive mechanism is preferably a servo motor that can realize fixed-angle rotation.

[0028] Preferably, the upper part of the exhaust pipe 6 is provided with multiple groups of evenly distributed first stirring teeth 6.1, the lower part of the exhaust pipe 6 is provided with multiple groups of evenly distributed second stirring teeth 6.2, the length of the first stirring teeth 6.1 is greater than the length of the second stirring teeth 6.2; the lower part of the exhaust pipe is provided with multiple groups of evenly distributed exhaust holes 6.3.

[0029] Preferably, the left side of the planetary gear 7 abuts against the gear baffle 13 , and the right side abuts against the inner step surface of the intermittent exhaust fork 5 ; and a shaft sealing structure 14 is provided between the gear baffle 13 and the exhaust pipe 6 .

[0030] Preferably, the top of the first curved surface 5.1 is in contact with the inner wall of the cylinder 1, and the first curved surface 5.1 is provided with a groove 5.11 capable of covering all the strip-shaped exhaust holes 8, and a sealing strip is provided on the outer periphery of the groove 5.11; there is a fluid flow gap between the bottom of the second curved surface 5.2 and the inner wall of the cylinder 1, and a third stirring tooth is provided on the top.

[0031] A mechanical sealing structure 15, especially a rotating mechanical sealing element, is arranged between the sealing cover 2 and the support shaft 12, and a combined sealing ring 16 is arranged between the left end cover 3 and the support shaft 12; a shaft sleeve 17 is arranged on the outside of the intermittent exhaust fork 5, and the right side wall of the cylinder 1 and the mechanical sealing structure 15 are arranged on the outside of the shaft sleeve 17 in sequence from left to right, and a sealing ring and a bearing 18 are arranged between the right end cover 4 and the intermittent exhaust fork 5 in sequence from left to right.

[0032] The support shaft 12 and the intermittent exhaust fork 5 are connected to the ground through a support base 19 respectively.

[0033] Embodiment 2: Based on Embodiment 1, the third stirring tooth is a strip-shaped structure extending along the axis direction of the cylinder 1, or extending along the direction inclined at 15-20 degrees to the axis direction of the cylinder 1.

[0034] Example 3: Figure 4As shown, a high-efficiency coke oven gas desulfurization system includes a coking coal crushing device 20, a grinding device 21, a magnetic separation device 22, an ultrasonic oscillation and conveying device 23, a flue gas conveying device 24, a tar collecting device 25, a gas collecting hood 26, a desulfurization device 27, a reduction tower 28 and a chimney 29; characterized in that: the coking coal crushing device 20, the grinding device 21, the magnetic separation device 22, the ultrasonic oscillation and conveying device 23, the gas collecting hood 26, the desulfurization device 27, the reduction tower 28 and the chimney 29 are connected in sequence, the flue gas conveying device 24 and the tar collecting device 25 are connected to one side of the ultrasonic oscillation and conveying device 23, the dust collecting hood 26 is arranged on the upper part of the ultrasonic oscillation and conveying device 23, and a fluid circulation path is arranged between the desulfurization device 27 and the reduction tower 28.

[0035] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

[0037] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A high-efficiency coke oven gas desulfurization device, comprising a horizontally placed cylindrical body (1), a sealing cover (2) being arranged on the left side of the body (1); a left end cover (3) and a right end cover (4) being arranged on both sides of the body (1); wherein: The left end cover (3) is connected to the sealing cover (2), and the right end cover (4) is connected to the right side wall of the cylinder (1); a support shaft (12) is provided between the left end cover (3) and the sealing cover (2), and the left side of the support shaft (12) extends out of the left end cover (3); the right end cover (4) is connected to an intermittent exhaust fork (5) via a bearing (18); the intermittent exhaust fork (5) comprises a first curved surface (5.1) at the top and a second curved surface (5.2) at the bottom in the cylinder (1); an exhaust pipe (6) extending to the inside of the cylinder (1) is provided inside the intermittent exhaust fork (5), and the exhaust pipe (6) is connected to the cylinder (1). A planetary gear (7) is arranged between the intermittent exhaust forks (5); a strip exhaust hole (8) is arranged on the top of the cylinder (1) and is distributed parallel to the axis of the cylinder (1); a threaded hole (9) is arranged on the bottom of the cylinder (1), the threaded hole (9) is connected to a drain pipe joint, and the bottom of the drain pipe joint is connected to a drain pipe; a foam desulfurization agent injection pipeline (10) is arranged on the left side of the top of the cylinder (1); a liquid level detector (11) is arranged in the middle and upper part of the sealing cover (2); the cylinder (1), the exhaust pipe (6) and the support shaft (12) are coaxially arranged; and a rotation drive mechanism is connected to the right side of the exhaust pipe (6) or the intermittent exhaust fork (5).

2. The high-efficiency coke oven gas desulfurization device according to claim 1 is characterized in that: The upper part of the exhaust pipe (6) is provided with a plurality of groups of evenly distributed first stirring tooth structures (6.1), the lower part of the exhaust pipe (6) is provided with a plurality of groups of evenly distributed second stirring tooth structures (6.2), the length of the first stirring teeth (6.1) being greater than the length of the second stirring teeth (6.2); and the lower part of the exhaust pipe is provided with a plurality of groups of evenly distributed exhaust holes (6.3).

3. The high-efficiency coke oven gas desulfurization device according to claim 1 is characterized in that: The left side of the planetary gear (7) abuts against the gear baffle (13), and the right side abuts against the inner step surface of the intermittent exhaust fork (5); and a shaft sealing structure (14) is provided between the gear baffle (13) and the exhaust pipe (6).

4. The high-efficiency coke oven gas desulfurization device according to claim 1 is characterized in that: The top of the first curved surface (5.1) fits the inner wall of the cylinder (1), and the first curved surface (5.1) is provided with a sink (5.11) capable of covering all the strip-shaped exhaust holes (8); a fluid flow gap exists between the bottom of the second curved surface (5.2) and the inner wall of the cylinder (1), and a third stirring tooth is provided on the top.

5. The high-efficiency coke oven gas desulfurization device according to claim 1 is characterized in that: A mechanical sealing structure (15) is provided between the sealing cover (2) and the support shaft (12), and a combined sealing ring (16) is provided between the left end cover (3) and the support shaft (12); a shaft sleeve (17) is provided outside the intermittent exhaust fork (5), and the right side wall of the cylinder (1) and the mechanical sealing structure (15) are provided outside the shaft sleeve (17) in sequence from left to right, and a sealing ring and a bearing (18) are provided between the right end cover (4) and the intermittent exhaust fork (5) in sequence from left to right.

6. A high-efficiency coke oven gas desulfurization device according to claim 5, characterized in that: The support shaft (12) and the intermittent exhaust fork (5) are respectively connected to the ground via a support base (19).

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