Coke oven gas desulfurization device

Abstract

The utility model discloses a coke oven gas desulfurization device, which relates to the technical field of absorption towers and comprises an absorption tower main body, a gas-liquid contactor is arranged in the absorption tower main body, a gas inlet, a liquid inlet, a water outlet and a manhole are arranged on the side surface of the absorption tower main body, and a gas outlet is arranged at the top of the absorption tower main body. The top of the inner end face of the absorption tower body is provided with a demister, the gas-liquid contactor comprises an intercepting plate and a gas channel cover, gas holes are evenly formed in the upper end face of the gas-liquid contactor, and the gas channel cover is installed at the upper ends of the gas holes and slidably connected with the intercepting plate. Fixed plates fixedly connected are arranged between the intercepting plate and the absorption tower, overflow runners are formed between the adjacent fixed plates, and limiting flanges are arranged on the upper end faces of the air holes. The device disclosed by the utility model has the advantages of high-efficiency gas-liquid contact, reduction of adsorption liquid consumption and prevention of shutdown suck-back, and solves the problems of low desulfurization efficiency, high operation cost and poor equipment stability in the traditional method.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of absorption tower, specifically is a coke oven gas desulfurization device. BACKGROUND

[0002] Coke oven gas is one of the by-products produced in the process of coal coking, which contains a certain amount of sulfides, such as hydrogen sulfide. If these sulfides are directly discharged into the atmosphere, it will cause serious environmental pollution and may violate environmental protection regulations. Therefore, before the coke oven gas is utilized, it must be effectively desulfurized.

[0003] The traditional coke oven gas desulfurization method mainly relies on the wet scrubbing method, that is, by introducing the coke oven gas into the tower filled with absorption liquid, the sulfides in the gas react with the absorption liquid to remove the sulfides. However, the traditional method has some disadvantages, such as insufficient gas-liquid contact, resulting in low desulfurization efficiency; the packed tower requires a large amount of adsorption liquid, increasing the operating cost; and due to the design of the equipment structure, backflow may occur during shutdown, affecting the long-term stable operation of the equipment. Therefore, a coke oven gas desulfurization device is needed to solve the above problems. SUMMARY

[0004] The utility model aims at providing a coke oven gas desulfurization device, which has the advantages of efficient gas-liquid contact, saving adsorption liquid and preventing backflow during shutdown, solving the problems of low desulfurization efficiency, high operating cost and poor equipment stability in the traditional method.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a coke oven gas desulfurization device, comprising an absorption tower main body, a gas-liquid contactor is arranged in the absorption tower main body;

[0006] The side of the absorption tower main body is provided with an air inlet, a liquid inlet, a drain and a manhole, the top of the absorption tower main body is provided with an air outlet, the top of the inner end face of the absorption tower main body is provided with a demister, the gas-liquid contactor comprises an intercepting plate and a gas duct cover, the upper end face of the gas-liquid contactor is uniformly provided with a gas hole, the gas duct cover is installed at the upper end of the gas hole and is slidably connected with the intercepting plate, the upper end face of the intercepting plate is provided with an overflow flange, the intercepting plate and the absorption tower are provided with a fixedly connected fixed plate, overflow channels are formed between adjacent fixed plates, and the upper end face of the gas hole is provided with a limiting flange.

[0007] As a preferred coke oven gas desulfurization device of the utility model, the lower end of the gas duct cover is provided with a limiting ring slidably connected with the gas hole, the upper end face of the limiting ring is provided with a connecting rod fixedly connected with the gas duct cover, a compression spring is arranged between the limiting ring and the limiting flange, and the gas duct cover and the intercepting plate are elastically slidably connected through the compression spring.

[0008] As a kind of coke oven gas desulfurization device preferred of the utility model, the lower end of the fixed plate is provided with the gas resistance ring corresponding to the overflow channel position, the gas resistance ring is slidably connected with the absorption tower main body, the lower end of the gas resistance ring is provided with the support rod slidably connected with the absorption tower main body.

[0009] As a kind of coke oven gas desulfurization device preferred of the utility model, the inner end surface of the absorption tower main body is provided with the ear plate rotatably connected with the support rod, the support rod is provided with torsion spring, the support rod and the ear plate are elastically rotatably connected by torsion spring and ear plate, the upper end surface of the support rod is arc-shaped structure, the top of the support rod and the bottom of the gas resistance ring are slidably connected.

[0010] As a kind of coke oven gas desulfurization device preferred of the utility model, the upper end surface of the gas channel cover is spherical top structure, the diameter of the gas channel cover is greater than the diameter of the limiting flange.

[0011] As a kind of coke oven gas desulfurization device preferred of the utility model, the bottom of the side end surface of the absorption tower main body is provided with the slag discharge port, the water outlet is located at the upper end of the slag discharge port, and the front end of the water outlet is provided with a filter screen.

[0012] As a kind of coke oven gas desulfurization device preferred of the utility model, the bottom of the inner end surface of the absorption tower main body is conical structure.

[0013] Compared with the prior art, the utility model has the advantages as follows:

[0014] 1, the utility model discloses a gas-liquid contactor is arranged in absorption tower main body and contains intercepting plate, gas channel cover and other components, the gas hole is evenly arranged on the upper end surface of intercepting plate, the gas channel cover is installed on the upper end of the gas hole and is slidably connected with intercepting plate, the overflow flange is formed on the edge of the upper end surface of intercepting plate, and the fixed plate between absorption tower forms overflow channel, the limiting flange is arranged on the upper end surface of the gas hole, the coke oven gas passes through the gas hole and lifts the gas channel cover from bottom to top, the absorption solution falls from the spray head through the liquid inlet, and after initial adsorption, it falls on the intercepting plate, and under the action of overflow flange and limiting flange, shallow adsorption liquid layer is formed, the gas flow overflows from the bottom of the gas channel cover and fully contacts with the adsorption liquid, through such structure, high-efficiency gas-liquid contact effect is generated, and the adsorption liquid consumption is saved, the problems of insufficient gas-liquid contact and low desulfurization efficiency of traditional desulfurization device are solved, the sulfides in coal gas can be fully adsorbed, and backflow does not occur when equipment stops.

[0015] 2, the utility model discloses a gas passage cover and the intercepting plate structure of elastic connection, the gas passage cover is covered on the air hole under the spring reset action, and a certain pressure airflow can open it, avoids the airflow to be not stable due to the absorption liquid remaining in the gas passage, still facilitates flushing the upper end face residual crystallization and impurity when the equipment stops, prevents the air hole from being blocked, the lower end of fixed plate is equipped with the gas resistance ring corresponding with overflow channel, the gas resistance ring is slidably connected with the absorption tower main body, the lower end of intercepting plate has the gas resistance ring, the support rod supports the gas resistance ring under the torsion spring effect, can press down the support rod when water flow accumulation and drain, the arc top reduces friction and improves stability, this structure generates the effect of stable water flow and automatic drainage, solves the problem that water flow and airflow interfere with each other and drain poorly. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the partial sectional view of the utility model;

[0017] Figure 2 It is the whole structure schematic view of the utility model;

[0018] Figure 3 It is the plan view of the utility model;

[0019] Figure 4 It is the Figure 3 A-A section of the utility model;

[0020] Figure 5 It is the Figure 4 B place enlarged view of the utility model;

[0021] Figure 6 It is the Figure 5 D place enlarged view of the utility model

[0022] Figure 7 It is the Figure 4 C place enlarged view of the utility model.

[0023] In the drawing: 1, absorption tower main body;101, gas inlet;102, gas outlet;103, slag outlet;104, drain outlet;1041, filter screen;105, liquid inlet;1051, spray head;107, manhole;108, demister;2, gas-liquid contactor;201, intercepting plate;2011, air hole;2012, limiting flange;2013, overflow flange;2014, fixed plate;202, gas passage cover;2021, limiting ring;2022, connecting rod;203, compression spring;204, gas resistance ring;205, support rod;206, ear plate;207, torsion spring;208, overflow channel. DETAILED DESCRIPTION

[0024] Please refer to Figures 1-5 , a coke oven gas desulfurization device, including absorption tower main body 1, absorption tower main body 1 is provided with gas-liquid contactor 2;

[0025] The side of the absorption tower body 1 is provided with an air inlet 101, a liquid inlet 105, a drainage outlet 104 and a manhole 107, the top of the absorption tower body 1 is provided with an air outlet 102, the inner end face top of the absorption tower body 1 is provided with a demister 108, the gas-liquid contactor 2 includes an intercepting plate 201 and a gas channel cover 202, the upper end face of the gas-liquid contactor 2 is uniformly provided with a gas hole 2011, the gas channel cover 202 is installed at the upper end of the gas hole 2011 and is in sliding connection with the intercepting plate 201, the upper end face edge of the intercepting plate 201 is provided with an overflow flange 2013, the intercepting plate 201 and the absorption tower are provided with a fixed plate 2014 in fixed connection, overflow channels 208 are formed between adjacent fixed plates 2014, and the upper end face of the gas hole 2011 is provided with a limiting flange 2012.

[0026] The coke oven gas passes through the intercepting plate 201 from bottom to top through the gas hole 2011, the gas channel cover 202 is lifted upward, the adsorption solution enters the tower from the liquid inlet 105, falls through the spray head 1051, and is in primary adsorption with air in the falling process, when falling on the upper end face of the intercepting plate 201, a relatively shallow adsorption liquid layer is formed on the upper end face of the intercepting plate 201 under the action of the overflow flange 2013 and the limiting flange 2012, the gas flow overflows from the bottom of the gas channel cover 202 and fully contacts the adsorption liquid on the surface of the intercepting plate 201, so that the sulfides in the gas are adsorbed.

[0027] Further, the lower end of the gas channel cover 202 is provided with a limiting ring 2021 in sliding connection with the gas hole 2011, the upper end face of the limiting ring 2021 is provided with a connecting rod 2022 fixed with the gas channel cover 202, the limiting ring 2021 and the limiting flange 2012 are provided with a compression spring 203, and the gas channel cover 202 and the intercepting plate 201 are in elastic sliding connection through the compression spring 203.

[0028] The gas channel cover 202 is covered on the gas hole 2011 under the reset action of the compression spring 203, so that the gas flow can only lift the gas channel cover 202 under a certain pressure, avoiding that the absorption liquid flows down from the gas channel after being lifted, causing unstable gas flow in the equipment, and the gas channel cover 202 is buckled on the upper end of the gas hole 2011 when not in use, facilitating washing of the residual crystals and impurities on the upper end face when the equipment is stopped, and avoiding that the crystals block the gas hole 2011.

[0029] Further, the lower end of the fixed plate 2014 is provided with a gas blocking ring 204 corresponding to the position of the overflow channel 208, the gas blocking ring 204 is in sliding connection with the absorption tower body 1, and the lower end of the gas blocking ring 204 is provided with a supporting rod 205 in sliding connection with the absorption tower body 1.

[0030] The gas blocking ring 204 is supported by the supporting rod 205, so that the gas flow is prevented from rising from the overflow channel 208, the water flow and the gas flow are separated, and the water flow and the gas flow flow stably.

[0031] Further, the inner end surface of the absorption tower body 1 is provided with an ear plate 206 rotationally connected with a support rod 205, the support rod 205 is provided with a torsion spring 207, the support rod 205 and the ear plate 206 are elastically rotationally connected through the torsion spring 207, the upper end surface of the support rod 205 is a circular arc structure, and the top of the support rod 205 is in sliding contact connection with the bottom of the gas blocking ring 204.

[0032] The support rod 205 supports the gas blocking ring 204 under the action of the torsion spring 207, when the absorption liquid is accumulated on the upper end of the gas blocking ring 204, the gas blocking ring 204 presses the support rod 205 downward under the action of water flow gravity, so that the support rod 205 is elastically rotated, the gas blocking ring 204 is slid downward, drainage is realized, and the arc-shaped top of the support rod 205 structure can reduce the friction between the support rod 205 and the water blocking plate, and improve the stability of the sliding of the water blocking plate.

[0033] Further, the upper end surface of the airway cover 202 is a spherical top structure, and the diameter of the airway cover 202 is greater than the diameter of the limiting flange 2012.

[0034] The spherical top structure of the airway cover 202 prevents the upper end surface of the airway cover 202 from being attached with stains or accumulating absorption liquid, improves the convenience during flushing, and the large-diameter airway cover 202 structure makes the gap between the airway cover 202 and the limiting flange 2012 larger, facilitating air flow circulation.

[0035] Further, the side end surface of the absorption tower body 1 is provided with a slag discharge port 103, a drainage port 104 is located at the upper end of the slag discharge port 103, and a filter screen 1041 is arranged at the front end of the drainage port 104.

[0036] The drainage port 104 discharges supernatant from the upper end, the slag discharge port 103 discharges a small amount of solid impurities at the bottom, the solid impurities are intercepted through the filter screen 1041, so that the solid impurities are prevented from being sucked into the drainage port 104, and the absorption liquid can be recycled and reused.

[0037] Further, the inner end surface of the absorption tower body 1 is provided with a circular conical structure.

[0038] The circular conical structure can make the solid impurities accumulate towards the center, so that the solid impurities can be quickly and concentratedly discharged during slag discharge, the discharge amount of the absorption liquid is reduced, and the utilization rate of the absorption liquid is improved.

[0039] In use, the valve of the gas inlet 101 is opened, and the coke oven gas enters from the gas inlet 101 at the bottom of the absorption tower at a stable flow rate. The gas flows upward, and when passing through the gas holes 2011 of the gas-liquid contactor 2, the gas channel cover 202 is lifted upward. At this time, the gas flow pressure is ensured to be stable, so that the gas channel cover 202 can be normally opened to allow the coke oven gas to pass through smoothly. At the same time, the valve of the liquid inlet 105 is opened, and the adsorption solution flows into the liquid inlet 105 and is uniformly sprayed through the spray head 1051. During the spraying process, the solution is preliminarily contacted with air to perform a primary adsorption reaction. The solution after the primary adsorption falls on the upper end face of the intercepting plate 201, and under the action of the overflow flange 2013 and the limiting flange 2012, a shallow and uniform adsorption liquid layer is formed on the intercepting plate 201. The coke oven gas flow overflows from the bottom of the lifted gas channel cover 202 and is fully contacted with the adsorption liquid on the surface of the intercepting plate 201 to perform a deep desulfurization reaction, so as to ensure that the sulfides in the coke oven gas are adsorbed as much as possible. The coke oven gas after desulfurization continues to rise, passes through the demister 108 at the top of the tower, removes the small liquid droplets carried therein, and is discharged from the gas outlet 102 to enter the subsequent process. With the continuous adsorption process, the adsorption solution will gradually contain more impurities. At this time, the bottom solid impurities are gathered and accumulated to the center under the action of the conical structure at the bottom of the inner end face of the absorption tower, and the solution is guided by the overflow channel 208. The supernatant is filtered through the filter screen 1041 at the front end of the drain port 104 and is discharged for recycling. The slag discharge port 103 is opened regularly to discharge sewage, and a small amount of bottom solid impurities are discharged from the slag discharge port 103.

[0040] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coke oven gas desulfurization device comprising an absorption tower main body (1), characterized in that: The gas-liquid contactor (2) is arranged in the absorption tower body (1); The side of the absorption tower body (1) is provided with an air inlet (101), a liquid inlet (105), a water outlet (104) and a manhole (107), the top of the absorption tower body (1) is provided with an air outlet (102), the top of the inner end surface of the absorption tower body (1) is provided with a demister (108), the gas-liquid contactor (2) comprises an intercepting plate (201) and a gas channel cover (202), the upper end surface of the gas-liquid contactor (2) is uniformly provided with a gas hole (2011), the gas channel cover (202) is slidably connected with the upper end of the gas hole (2011) and the intercepting plate (201), the upper end surface of the intercepting plate (201) is provided with an overflow flange (2013), the intercepting plate (201) and the absorption tower are fixedly connected with a fixed plate (2014), and overflow channels (208) are formed between adjacent fixed plates (2014).

2. A coke oven gas desulphurization device as claimed in claim 1, characterized in that: The lower end of the gas channel cover (202) is provided with a limiting ring (2021) slidably connected with the gas hole (2011), the upper end surface of the limiting ring (2021) is provided with a connecting rod (2022) fixed with the gas channel cover (202), and a compression spring (203) is arranged between the limiting ring (2021) and the limiting flange (2012).

3. A coke oven gas desulphurization unit as claimed in claim 1, wherein: The lower end of the fixed plate (2014) is provided with a gas blocking ring (204) corresponding to the position of the overflow channel (208), the gas blocking ring (204) is slidably connected with the absorption tower body (1), and the lower end of the gas blocking ring (204) is provided with a supporting rod (205) slidably connected with the absorption tower body (1).

4. A coke oven gas desulphurization device as claimed in claim 3, characterized in that: The inner end surface of the absorption tower body (1) is provided with an ear plate (206) rotationally connected with the supporting rod (205), the supporting rod (205) is provided with a torsion spring (207), the supporting rod (205) and the ear plate (206) are elastically rotationally connected with the ear plate (206) through the torsion spring (207), the upper end surface of the supporting rod (205) is in a circular arc structure, and the top of the supporting rod (205) is in sliding contact connection with the bottom of the gas blocking ring (204).

5. A coke oven gas desulphurization unit as claimed in claim 2, wherein: The upper end surface of the gas channel cover (202) is in a spherical top structure, and the diameter of the gas channel cover (202) is greater than that of the limiting flange (2012).

6. A coke oven gas desulphurization unit as claimed in claim 1, wherein: The side end surface of the absorption tower body (1) is provided with a slag discharge port (103) at the bottom, the water outlet (104) is located at the upper end of the slag discharge port (103), and the front end of the water outlet (104) is provided with a filter screen (1041).

7. A coke oven gas desulphurization unit as claimed in claim 6, characterized in that: The inner end surface of the absorption tower body (1) is in a conical structure at the bottom. The inner end surface of the absorption tower body (1) is in a conical structure at the bottom.

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