Desulfurization regeneration tower

Abstract

The utility model relates to the technical field of desulfurization, in particular to a desulfurization regeneration tower. A tower body of the desulfurization regeneration tower is vertically arranged and is of an integrated structure, the upper part is used for regeneration, and the lower part is used for desulfurization; the gas distributor, the filler, the desulfurizing liquid distribution device and the mist catching device are sequentially arranged in the lower tower body from bottom to top; the sieve plate, the desulfurization liquid outlet and the foam collecting device are sequentially arranged in the upper tower body from bottom to top; the desulfurization liquid circulating system comprises a desulfurization liquid pipe and a bubble generator, the desulfurization liquid pipe is connected with the bubble generator, the bubble generator is connected with the upper tower body and located below the sieve plate, and the desulfurization liquid pipe is connected with a pipeline at the bottom of the lower tower body. The investment is saved, the occupied area is saved, and the desulfurization regeneration effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization, in particular to a desulfurization regeneration tower. Background Art

[0002] At present, the coking industry in my country often uses the HPF method and PDS method with ammonia as the alkali source for coke oven gas desulfurization. The HPF method is an oxidative desulfurization and decyanation process with ammonia as the alkali source and HPF as the catalyst, and is widely used in coal gas desulfurization and decyanation. The desulfurization rich liquid of the desulfurization tower is pumped into the bottom of the regeneration tower, and compressed air is introduced into the bottom of the regeneration tower to oxidize and regenerate the desulfurization rich liquid. The regenerated desulfurization lean liquid returns to the desulfurization tower and is sprayed on the packing to absorb hydrogen sulfide in the coal gas. It has a high desulfurization and decyanation efficiency, a short process flow, no need for external alkali, and a small amount of catalyst. The sulfur foam generated during the process is pumped into the sulfur melting kettle through a foam pump. After repeated heating and dehydration, it is further heated and melted, and finally discharged as molten sulfur. After cooling, it is bagged and exported, which improves the efficiency of energy and resource utilization.

[0003] The HPF wet desulfurization process includes facilities such as a desulfurization tower, a regeneration tower, an accident tank and a sulfur melting kettle. At present, the desulfurization tower and the regeneration tower are separate structures and are set up separately, which not only requires high investment but also occupies a large area.

[0004] CN 217103768 U discloses "an integrated HPF wet desulfurization, decyanation and regeneration device", which integrates the equipment layout of the HPF wet desulfurization, decyanation and regeneration device to increase the safety and stability of the production process, making the overall system more flexible and efficient. By optimizing the connection structure of the HPF wet desulfurization, decyanation and regeneration device, the desulfurization tower I, desulfurization tower II and regeneration tower are connected in series to improve the desulfurization efficiency of coke oven gas. The above-mentioned integrated device only changes the connection method between the desulfurization tower and the regeneration tower, but the desulfurization tower and the regeneration tower are still set separately, which requires high investment and occupies a large area. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a desulfurization regeneration tower, which has low investment, saves land, and has good desulfurization regeneration effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A desulfurization regeneration tower, the tower body of the desulfurization regeneration tower is arranged vertically and is an integrated structure, the upper part is used for regeneration, and the lower part is used for desulfurization; a gas distributor, a filler, a desulfurization liquid distribution device and a mist collection device are arranged in the lower tower body from bottom to top; a sieve plate, a desulfurization liquid outlet and a foam collection device are arranged in the upper tower body from bottom to top; a desulfurization liquid circulation system includes a desulfurization liquid pipe and a bubble generator, the desulfurization liquid pipe is connected to the bubble generator, the bubble generator is connected to the upper tower body and is located below the sieve plate, and the desulfurization liquid pipe is connected to the bottom pipeline of the lower tower body.

[0008] Furthermore, the gas distributor adopts a double-row plate-type gas distributor.

[0009] Furthermore, it also includes a mist catching filler, which is located between the desulfurization liquid distribution device and the mist catching device.

[0010] Furthermore, the desulfurization liquid distribution device is composed of a primary distribution tank and a secondary distribution tank, the top of the primary distribution tank is connected to the bottom of the desulfurization liquid outlet, and the bottom of the primary distribution tank is connected to the secondary distribution tank.

[0011] The desulfurized liquid enters the secondary distribution tank through the primary distribution tank, and the desulfurized liquid is evenly distributed to the lower filler.

[0012] Furthermore, the sieve plate is a flat plate with uniform holes, and the sieve plate is used to cut and reduce the floating bubbles, so that more elemental sulfur adheres to the surface, thereby improving the flotation of elemental sulfur and maintaining the stability of the sulfur foam layer.

[0013] Furthermore, the foam collecting device includes a cylinder, a foam outlet and a ring plate; the cylinder is coaxial with the tower body, the cylinder is fixed to the ring plate, the ring plate is fixed to the tower body at an angle downward, the ring plate and the cylinder constitute a foam collecting groove, and the foam outlet is located at the lowest point of the foam collecting groove.

[0014] The sulfur foam rising from the cylinder flows through the top of the cylinder to the collection tank and is sent to the foam tank along the low point foam outlet. When there is sulfur foam deposited in the collection tank through the observation port, the spraying device is turned on and the deposited sulfur foam is discharged into the foam tank.

[0015] Furthermore, the desulfurized liquid outlet comprises a cylindrical body, a conical section and a small cylindrical body connected in sequence from top to bottom; a lattice-type partition is provided in the cylindrical body to constitute a primary separator; a cross-shaped partition is provided in the conical section to constitute a secondary separator.

[0016] The first separator completes the gas-liquid separation, and the second separator continues the gas-liquid separation to reduce the amount of air entrained in the desulfurized liquid. The bottom of the small cylinder extends into the first distribution tank, and the desulfurized liquid is directly distributed after regeneration to complete the removal of hydrogen sulfide in the coal gas.

[0017] Furthermore, the mist catching device comprises a swirl plate mist catching device, and the swirl plate of the swirl plate mist catching device is an upward swirl structure.

[0018] Furthermore, the mist catching device also includes a liquid collecting device, which includes a liquid collecting pipe and a liquid collecting cylinder, and the liquid collecting pipe is fixedly connected to the inner wall of the liquid collecting cylinder.

[0019] Furthermore, a plurality of bubble generators are evenly distributed around the circumference and horizontally fixed to the tower wall of the upper tower body, and each bubble generator is tilted to form a vortex shape.

[0020] Furthermore, the bubble generator includes a large straight tube, a small straight tube, a large conical tube, a small conical tube and a semi-annular tube; the semi-annular tube is fixedly connected to the outer wall of the large straight tube, and the semi-annular tube is connected to the compressed air pipe; the small straight tube is connected to the small conical tube, and the large straight tube is connected to the large conical tube, one end of the small straight tube is sleeved in the large straight tube, and the other end of the small straight tube is connected to the desulfurization liquid pipe, and the small conical tube is located at the semi-annular tube, where the large straight tube has through holes evenly distributed around its circumference; air enters the semi-annular tube, enters the interior of the large straight tube along the through holes, mixes with the desulfurization liquid sprayed from the small conical section, and continues to mix through the large conical tube to generate bubbles.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. The tower body of the utility model is arranged vertically and is an integrated structure. The upper part is used for regeneration and the lower part is used for desulfurization. The bubble generator is connected to the upper tower body; the gas distributor, filler, desulfurization liquid distribution device and mist collection device are arranged in the lower tower body from bottom to top; the sieve plate, desulfurization liquid outlet and foam collection device are arranged in the upper tower body from bottom to top.

[0023] At present, most of the desulfurization tower and regeneration tower use two independent towers, mainly using the high tower regeneration capacity of the regeneration tower, while the utility model uses a high-efficiency bubble generator to use compressed air and desulfurization liquid in the upper regeneration tank to achieve the regeneration effect. It has the advantages of high efficiency, compactness, energy saving, small footprint, good treatment effect and strong adaptability.

[0024] 2. The utility model has multiple bubble generators evenly distributed around the circumference and fixed horizontally on the tower wall of the upper tower body. Each bubble generator is tilted to form a vortex shape. The bubble generator is composed of a large straight tube, a small straight tube, a large conical tube, a small conical tube and a semi-circular tube. The air enters the semi-circular tube and enters the inside of the large straight tube along the through hole, mixes with the desulfurization liquid sprayed from the small conical section, and continues to mix through the large conical tube to generate bubbles. The bubbles are fine and uniform, and form a vortex in the tower, with a good regeneration effect.

[0025] 3. The utility model adopts both filler mist capture and mist capture device, and the mist capture filler is located between the desulfurization liquid distribution device and the mist capture device. The mist capture device adopts swirl plate mist capture, which has good mist capture effect and can greatly reduce the entrainment of desulfurization liquid in coal gas.

[0026] 4. The desulfurization liquid outlet of the utility model adopts a two-stage separator. The first-stage separator completes the gas-liquid separation, and the second-stage separator continues to separate the gas and liquid to reduce the amount of air entrained in the desulfurization liquid. The bottom of the desulfurization liquid outlet extends into the first-stage distribution tank, and the desulfurization liquid is directly distributed after regeneration to complete the removal of hydrogen sulfide in the coal gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view showing the structure of the utility model.

[0028] Figure 2 for Figure 1 AA section view.

[0029] Figure 3 for Figure 1 BB cross-sectional view.

[0030] Figure 4 for Figure 1 CC cross-sectional view.

[0031] Figure 5 for Figure 1 DD cross-sectional view.

[0032] Figure 6 This is a schematic diagram of the screen plate structure of the utility model.

[0033] Figure 7 This is a schematic diagram of the structure of the bubble generator of the utility model.

[0034] Figure 8 for Figure 7 EE cross-sectional view.

[0035] In the figure:

[0036] 1-body 11-upper head 111-observation port 112-exhaust outlet 12-circular cylinder 121-gas inlet 122-gas outlet 123-manhole 13-lower head 131-first vent 132-lower head cylinder 14 middle head 141-second vent

[0037] 2-Gas distributor

[0038] 3-Padding 31-Padding support

[0039] 4- Desulfurization liquid distribution device 41 primary distribution tank 42- secondary distribution tank

[0040] 5-Mist-catching filler 51-Mist-catching filler support

[0041] 6-mist catching device 61-supporting annular plate 62-liquid collecting device 621-liquid collecting pipe 622-liquid collecting cylinder 63-swirl plate mist catching device 631-small cylinder 632-large cylinder 633-swirl plate

[0042] 7-Sieve Plate

[0043] 8- desulfurization liquid outlet 81- large cylinder 811- lattice partition 82- cone section 821- cross partition 83- small long cylinder 84- valve

[0044] 9-Foam collecting device 91-Foam collecting cylinder 92-Foam outlet 93-Oblique ring plate 94-Spraying device

[0045] 10- Desulfurization liquid circulation system 101- Installation port 102- Bubble generator 103- Connecting pipe 104- Desulfurization liquid main pipe 105- Desulfurization liquid inlet 106- Bracket 107- Desulfurization liquid pump 108- Desulfurization liquid outlet 1021- Large straight pipe 1022- Small straight pipe 1023- Large cone pipe 1024- Small cone pipe 1025- Semi-ring pipe DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in 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.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0049] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] In the description of the utility model, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0052] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0053] [Example]

[0054] like Figure 1-8 As shown, a desulfurization regeneration tower is provided, the tower body of the desulfurization regeneration tower is arranged vertically, and is an integrated structure, the upper part is used for regeneration, and the lower part is used for desulfurization. It includes a tower body 1, a gas distributor 2, a filler 3, a desulfurization liquid distribution device 4, a mist catching filler 5, a mist catching device 6, a sieve plate 7, a desulfurization liquid outlet 8, a foam collecting device 9 and a desulfurization liquid circulation system 10.

[0055] The tower body 1 is a vertically arranged integrated structure, with an upper end cap 11 at the top, a circular cylinder 12 in the middle, and a lower end cap 13 at the bottom. The middle end cap 14 is arranged in the middle of the circular cylinder 12, dividing the circular cylinder 12 into an upper part and a lower part, and dividing the desulfurization regeneration tower into two parts, the upper part is used for regeneration, and the lower part is used for desulfurization.

[0056] The upper end cap 11 is provided with an observation port 111 and an exhaust gas outlet 112, the bottom of the middle end cap 14 is provided with a second vent 141, the bottom of the lower end cap 13 is provided with a first vent 131, and the bottom center of the lower end cap 13 is provided with a lower end cap cylinder 132. The circular cylinder 12 of the lower desulfurization regeneration tower is provided with a gas inlet 121 at the bottom and a gas outlet 122 at the top. The circular cylinder 12 is evenly distributed with manholes 123 vertically. The first vent 131 and the second vent 141 are outlets for extracting desulfurization liquid containing high-concentration salts, which extract a certain amount of desulfurization liquid containing high-concentration salts and send it to acid production or salt extraction to ensure desulfurization efficiency.

[0057] The gas distributor 2, the filler 3, the desulfurization liquid distribution device 4, the mist catching filler 5, and the mist catching device 6 are arranged in the lower circular cylinder 12 in sequence from bottom to top.

[0058] The gas distributor 2 is a double-row plate-type gas distributor, and the gas distributor 2 is connected to the coal gas inlet 121. The packing support 31 is fixed in the circular cylinder 12, and the packing 3 is placed on the packing support 31.

[0059] The desulfurized liquid distribution device 4 is composed of a primary distribution tank 41 and a secondary distribution tank 42. The top of the primary distribution tank 41 is connected to the bottom of the desulfurized liquid outlet 8, and the bottom of the primary distribution tank 41 is connected to the secondary distribution tank 42. The desulfurized liquid enters the secondary distribution tank 42 through the primary distribution tank 41, and the desulfurized liquid is evenly distributed to the lower layer of filler 3.

[0060] The mist catching filler support 51 is fixedly connected in the circular cylinder 12 , and the mist catching filler 5 is placed on the mist catching filler support 51 .

[0061] like Figure 1 , Figure 5 As shown, the mist catching device 6 includes a supporting annular plate 61, a liquid collecting device 62 and a swirl plate mist catching device 63. The supporting annular plate 61 is horizontally fixed to the inner wall of the circular cylinder 12, and a plurality of swirl plate mist catching devices 63 are evenly distributed and fixed to the bottom surface of the supporting annular plate 61. In this embodiment, there are six swirl plate mist catching devices 63.

[0062] The swirl plate mist collector 63 includes a small cylinder 631, a large cylinder 632 and a swirl plate 633. Both the large and small cylinders are fixed to the bottom surface of the supporting circular ring plate 61, with the small cylinder 631 inside and the large cylinder 632 outside. The swirl plate 633 is fixed to the bottom plate of the large cylinder 632. The swirl plate 633 is an upward swirl structure. After the coal gas carrying the desulfurization liquid undergoes swirl, the liquid moves upward along the large cylinder 632, hits the small cylinder 631 and the supporting circular ring plate 61, moves downward, flows downward by gravity, and is discharged through the liquid collecting device 62 to remove the desulfurization liquid entrained in the coal gas.

[0063] The liquid collecting device 62 includes a liquid collecting pipe 621 and a liquid collecting cylinder 622. The liquid collecting pipe 621 is fixedly connected to the inner wall of the liquid collecting cylinder 622. A plurality of liquid collecting devices 62 are provided, and the liquid collecting devices 62 are fixedly connected to the bottom surface of the supporting annular plate 61 or the bottom plate of the large cylinder 632. The desulfurized liquid collected by the liquid collecting device 62 enters the lower packing after full flow, and also plays a role of liquid sealing.

[0064] like Figure 1 , 6 As shown, the sieve plate 7 is a flat plate with uniform holes. The sieve plate 7 is used to cut and reduce the floating bubbles, so that more elemental sulfur adheres to the surface, thereby improving the flotation of elemental sulfur and maintaining the stability of the sulfur foam layer.

[0065] The desulfurized liquid outlet 8 includes a large cylindrical body 81, a conical section 82 and a small long cylindrical body 83 which are sequentially connected from top to bottom. The large cylindrical body 81 is fixed to the inner wall of the circular cylindrical body 12 through a supporting plate. The small long cylindrical body 83 sequentially passes through the sieve plate 7, the middle head 14, the supporting annular plate 61, and the mist catching filler 5, and extends into the primary distribution tank 41. The desulfurized liquid is directly distributed after regeneration to complete the removal of hydrogen sulfide in the coal gas.

[0066] A lattice partition 811 is provided in the large cylindrical body 81 to form a primary separator, and a cross partition 821 is provided in the conical section 82 to form a secondary separator. The primary separator completes gas-liquid separation, and the secondary separator continues gas-liquid separation to reduce the amount of air entrained in the desulfurized liquid.

[0067] The foam collecting device 9 includes a foam collecting cylinder 91, a foam outlet 92, an oblique ring plate 93 and a spraying device 94. The foam collecting cylinder 91 is coaxial with the circular cylinder 12. The foam collecting cylinder 91 is fixed to the oblique ring plate 93. The oblique ring plate 93 is fixed in the circular cylinder 12 in a horizontal downward tilt. The oblique ring plate 93 and the foam collecting cylinder 91 constitute a foam collecting groove. The foam outlet 92 is fixed to the circular cylinder 12 and is located at the lowest point of the foam collecting groove.

[0068] The sulfur foam rising from the foam collecting cylinder 91 flows through the top of the foam collecting cylinder 91 to the foam collecting tank and is discharged along the low point foam outlet 92. When sulfur foam is deposited in the foam collecting tank through the observation port 111, the spraying device 94 is turned on and the deposited sulfur foam is discharged through the foam outlet 92.

[0069] The valve 84 is arranged in the small long cylinder 83, and the flow rate of the desulfurized liquid in the small long cylinder 83 is controlled by the valve 84. The sulfur foam is observed through the top observation hole 111 to ensure that the sulfur foam flows out through the foam collecting device 9 to reduce the sulfur content in the desulfurized lean liquid.

[0070] like Figure 1 , Figure 7 , Figure 8As shown, the desulfurization liquid circulation system 10 includes an installation port 101, a bubble generator 102, a connecting pipe 103, a desulfurization liquid main pipe 104, a desulfurization liquid inlet 105, a bracket 106, a desulfurization liquid pump 107 and a desulfurization liquid outlet 108. The desulfurization liquid outlet 108 is fixed to the bottom of the lower head 13, the desulfurization liquid outlet 108 is connected to the desulfurization liquid pump 107 through a pipeline, the desulfurization liquid pump 107 is connected to the desulfurization liquid inlet 105 through a pipeline, the desulfurization liquid inlet 105 is connected to the desulfurization liquid main pipe 104, and the desulfurization liquid main pipe 104 is connected to the bubble generator 102 through the connecting pipe 103.

[0071] The desulfurization liquid at the bottom of the desulfurization tower passes through the outside of the lower head cylinder 132 to separate some particulate matter and then flows into the inside of the lower head cylinder 132, passes through the desulfurization liquid outlet 108, and is sent to the desulfurization liquid main pipe 104 by the desulfurization liquid pump 107, and then passes through the bubble generator 102, the desulfurization liquid and air are mixed, and regenerated in the space below the sieve plate 7.

[0072] A plurality of bubble generators 102 are evenly distributed and fixed horizontally on the outer wall of the circular cylinder 12 through the mounting opening 101 and the bracket 106. Each bubble generator 102 is tilted to form a vortex shape. In this embodiment, there are 8 bubble generators 102. When the 8 bubble generators 102 are arranged, they are tilted at a certain angle along the horizontal. The desulfurized liquid after the gas and liquid are mixed pushes and collides with each other to form a vortex flow, which further enhances the regeneration of the desulfurized liquid.

[0073] The bubble generator 102 includes a large straight tube 1021, a small straight tube 1022, a large conical tube 1023, a small conical tube 1024 and a semi-circular tube 1025. The semi-circular tube 1025 is fixed to the outer wall of the large straight tube 1021, and the semi-circular tube 1025 is connected to the compressed air pipe. The small straight tube 1022 is connected to the small conical tube 1024, and the large straight tube 1021 is connected to the large conical tube 1023. One end of the small straight tube 1022 is sleeved in the large straight tube 1021, and the other end of the small straight tube 1022 is connected to the desulfurization liquid main pipe 104 through a flange and a connecting pipe 103. The small conical tube 1024 is located at the semi-circular tube 1025, where the large straight tube 1021 has holes evenly distributed around the circumference. The air enters the semi-circular tube 1025, enters the inside of the large straight tube 1021 along the through hole, mixes with the desulfurization liquid sprayed from the small cone tube 1024, and continues to mix to generate bubbles through the large cone tube 1023. The bubbles are fine and uniform, and form a vortex in the tower, with a good regeneration effect.

[0074] The working principle and working process of the utility model are as follows:

[0075] The coal gas enters the tower from the coal gas inlet 121, passes through the double-row plate-type gas distributor 2, and is evenly distributed upward along the circular cylinder 12. It is desulfurized in the reverse direction with the desulfurization liquid evenly distributed in the filler 3, and hydrogen sulfide in the coal gas is removed. The desulfurized coal gas passes upward through the mist catching filler 5 to preliminarily remove the desulfurization liquid droplets entrained in the coal gas. The coal gas continues to pass through the cyclone plate mist catching device 63 to further remove the desulfurization liquid entrained in the coal gas, and then passes upward through the coal gas outlet 122 to be sent to the next process.

[0076] The desulfurization liquid flows downward along the filler 3 along the desulfurization tower, contacts the coal gas, and finally enters the bottom space. The desulfurization liquid fills the collection space and flows through the top of the lower head cylinder 132 to the inside of the lower head cylinder 132 through the desulfurization liquid outlet 108, and is delivered to the desulfurization liquid main pipe 104 by the desulfurization liquid pump 107, and then enters the bubble generator 102.

[0077] The desulfurization liquid is sprayed out at high speed from the small conical tube 1024, and the compressed air passes through the uniform opening of the large straight tube 1021 and enters the interior of the large straight tube 1021, where it cuts with the desulfurization liquid sprayed out from the small conical tube 1024 at the outlet end of the small conical tube 1024, forming turbulence, which is conducive to bubble generation. The gas and liquid penetrate and collide with each other inside the large straight tube 1021, and the high-speed flowing liquid transfers energy to the air, accelerating and compressing it. The air is crushed into bubbles with smaller diameters, and the speed increases again when passing through the large conical tube 1023, and the air is further compressed. The sprayed gas-liquid mixture presents a dense foam flow state, and a regeneration reaction has occurred. At the outlet of the large conical tube 1023, the speed of the desulfurization liquid and the compressed air decreases, and the regeneration reaction continues.

[0078] The bubble generator 102 is arranged at a certain angle along the horizontal direction, and the desulfurized liquid after the gas and liquid are mixed pushes and collides with each other to form a vortex flow, which further strengthens the regeneration of the desulfurized liquid. The desulfurized liquid enters the sieve plate 7 upward, and the sieve plate 7 is used to cut and reduce the floating bubbles, so that more elemental sulfur adheres to the surface, improves the flotation of elemental sulfur, and keeps the sulfur foam layer stable.

[0079] The desulfurized liquid enters the desulfurized liquid outlet 8 upwards, passes through the primary separator, and completes the gas-liquid separation; in the secondary separator, the gas-liquid separation continues, reducing the amount of air entrained in the desulfurized liquid. After regeneration, the desulfurized liquid is directly distributed to complete the removal of hydrogen sulfide in the coal gas.

[0080] The sulfur foam rising from the foam collecting cylinder 91 flows through the top of the foam collecting cylinder 91 to the foam collecting tank and is discharged along the low point foam outlet 92. When the foam collecting tank is observed to have deposited sulfur foam through the observation port 111, the spraying device 94 is turned on to discharge the deposited sulfur foam. The first vent 131 and the second vent 141 are outlets for extracting the desulfurization liquid containing high concentration salts, which extract a certain amount of the desulfurization liquid containing high concentration salts and send it to acid production or salt extraction to ensure the desulfurization efficiency.

[0081] At present, most of the desulfurization tower and regeneration tower use two independent towers, mainly using the high tower regeneration capacity of the regeneration tower, while the utility model uses a high-efficiency bubble generator, and uses compressed air and desulfurization liquid in the upper regeneration tank to achieve the regeneration effect. The tower body of the utility model is vertically arranged, which is an integrated structure, with the upper part used for regeneration and the lower part for desulfurization. It has the advantages of high efficiency, compactness, energy saving, small footprint, good treatment effect and strong adaptability.

[0082] The utility model adopts a novel bubble generator 102, which is evenly distributed around the circumference and horizontally fixed to the tower wall of the upper tower body. Each bubble generator 102 is tilted to form a vortex shape. The bubbles are fine and uniform, and a vortex is formed in the tower, so the regeneration effect is good.

[0083] The utility model adopts both the mist catching filler 5 and the mist catching device 6, and the mist catching filler 5 is located between the desulfurization liquid distribution device 4 and the mist catching device 6. The mist catching device 6 adopts a swirl plate to catch mist, which has a good mist catching effect and can greatly reduce the entrainment of desulfurization liquid in the coal gas.

[0084] The desulfurization liquid outlet 8 of the utility model adopts a two-stage separator. The first-stage separator completes the gas-liquid separation, and the second-stage separator continues to separate the gas and liquid to reduce the amount of air entrained in the desulfurization liquid. The bottom of the small cylinder extends into the first-stage distribution tank, and the desulfurization liquid is directly distributed after regeneration to complete the removal of hydrogen sulfide in the coal gas.

[0085] The above description is only part of the specific implementation methods of the utility model, and the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the utility model according to the technical solution and utility model concept of the utility model, which should be covered by the protection scope of the utility model.

Claims

1. A desulfurization regeneration tower, characterized in that: The desulfurization regeneration tower is vertically arranged and is an integrated structure, with the upper part used for regeneration and the lower part used for desulfurization; The gas distributor, filler, desulfurization liquid distribution device and mist collection device are arranged in the lower tower body from bottom to top; The sieve plate, the desulfurization liquid outlet and the foam collecting device are arranged in the upper tower body from bottom to top; The desulfurization liquid circulation system includes a desulfurization liquid pipe and a bubble generator. The desulfurization liquid pipe is connected to the bubble generator. The bubble generator is connected to the upper tower body and is located below the sieve plate. The desulfurization liquid pipe is connected to the bottom pipeline of the lower tower body.

2. A desulfurization regeneration tower according to claim 1, characterized in that: It also includes a mist catching filler, which is located between the desulfurization liquid distribution device and the mist catching device.

3. A desulfurization regeneration tower according to claim 1, characterized in that: The desulfurization liquid distribution device is composed of a primary distribution tank and a secondary distribution tank. The top of the primary distribution tank is connected to the bottom of the desulfurization liquid outlet, and the bottom of the primary distribution tank is connected to the secondary distribution tank.

4. A desulfurization regeneration tower according to claim 1, characterized in that: The foam collecting device comprises a cylinder, a foam outlet and a ring plate; The cylinder is coaxial with the tower body, the cylinder is fixed on the ring plate, the ring plate is tilted downward and fixed on the tower body, the ring plate and the cylinder form a foam collecting tank, and the foam outlet is located at the lowest point of the foam collecting tank.

5. A desulfurization regeneration tower according to claim 1, characterized in that: The desulfurized liquid outlet comprises a cylindrical body, a cone section and a small cylindrical body connected in sequence from top to bottom; The cylinder is provided with a lattice partition to form a primary separator; A cross-shaped partition is arranged in the cone section to form a secondary separator.

6. A desulfurization regeneration tower according to claim 1, characterized in that: The mist catching device comprises a swirl plate mist catching device, and the swirl plate of the swirl plate mist catching device is an upward swirl structure.

7. A desulfurization regeneration tower according to claim 6, characterized in that: The mist catching device also includes a liquid collecting device, which includes a liquid collecting pipe and a liquid collecting cylinder, and the liquid collecting pipe is fixedly connected to the inner wall of the liquid collecting cylinder.

8. A desulfurization regeneration tower according to claim 1, characterized in that: A plurality of bubble generators are evenly distributed around the circumference and fixedly connected horizontally to the tower wall of the upper tower body, and each bubble generator is tiltedly arranged to form a vortex shape.

9. A desulfurization regeneration tower according to claim 1, characterized in that: The bubble generator comprises a large straight tube, a small straight tube, a large conical tube, a small conical tube and a semi-annular tube; The semi-annular tube is fixedly connected to the outer wall of the large straight tube, and the semi-annular tube is connected to the compressed air pipe; The small straight tube is connected to the small conical tube, the large straight tube is connected to the large conical tube, one end of the small straight tube is sleeved in the large straight tube, and the other end of the small straight tube is connected to the desulfurization liquid pipe. The small conical tube is located at the semi-annular tube, where the large straight tube has holes evenly distributed around its circumference. The air enters the semi-annular tube, enters the large straight tube along the through hole, mixes with the desulfurization liquid sprayed from the small cone section, and continues to mix through the large cone tube to generate bubbles.

Images