A desulfurization regenerator and method

Abstract

The present application relates to desulfurization technical field, specifically to a kind of desulfurization regenerator and method.The tower body of the desulfurization regenerator is vertically arranged, for integrated structure, upper part is used for regeneration, lower part is used for desulfurization;Gas distributor, packing, desulfurization liquid distribution device and mist catcher are sequentially arranged in lower part tower body from bottom to top;Screen plate, desulfurization liquid outlet and foam collecting device are sequentially arranged in upper part tower body from bottom to top;Desulfurization liquid circulation system includes desulfurization liquid pipe and bubble generator, desulfurization liquid pipe is connected with bubble generator, bubble generator is connected with upper part tower body, located below screen plate, desulfurization liquid pipe is connected with lower part tower body bottom pipeline.It is good in investment, land saving, and desulfurization regeneration effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of desulfurization, in particular to a desulfurization regenerator and method. BACKGROUND

[0002] At present, HPF method and PDS method using ammonia as alkali source are commonly used in the coking industry in China for coke oven gas desulfurization. HPF desulfurization is an oxidation desulfurization and decyanation process using ammonia as alkali source and HPF as catalyst, which is widely used in coal gas desulfurization and decyanation. The desulfurization rich liquid of the desulfurization tower is pumped into the bottom of the regenerator, and compressed air is introduced into the bottom of the regenerator, so that the desulfurization rich liquid is oxidized and regenerated. The desulfurization lean liquid after regeneration returns to the desulfurization tower and is sprayed onto the filler for absorbing hydrogen sulfide in the coal gas. It has high desulfurization and decyanation efficiency, short process flow, no need for external alkali, less catalyst consumption, and the generated sulfur foam is pumped into the sulfur melting kettle through the foam pump, and after repeated heating and dehydration, it is further heated and melted, and finally discharged as molten sulfur, which is cooled and packaged for sale, improving the energy and resource utilization efficiency.

[0003] In the HPF wet desulfurization process, facilities such as desulfurization tower, regenerator, accident tank and sulfur melting kettle are included. At present, the desulfurization tower and the regenerator are separate structures and are separately arranged, which not only has high investment but also occupies a large area.

[0004] CN 217103768U discloses "a HPF wet desulfurization and decyanation regenerative integrated device", which integrates the equipment layout of the HPF wet desulfurization and decyanation regenerative integrated device, increases the safety and stability of the production process, and makes the overall system more flexible and efficient. By optimizing the connection structure of the HPF wet desulfurization and decyanation regenerative integrated device, the desulfurization tower I, the desulfurization tower II and the regenerator are connected in series to improve the desulfurization efficiency of the coke oven gas. The above-mentioned integrated device only changes the connection mode of the desulfurization tower and the regenerator, but the desulfurization tower and the regenerator are still separately arranged, which has high investment and occupies a large area. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the present application provides a desulfurization regenerator and method, which has low investment, saves land occupation, and has good desulfurization regeneration effect.

[0006] In order to achieve the above purpose, the following technical scheme is adopted in the present application:

[0007] A desulfurization regenerator, the tower body of which is vertically arranged and is of an integrated structure, the upper part of which is used for regeneration and the lower part of which is used for desulfurization; a gas distributor, a filler, a desulfurization liquid distribution device and a mist catching device are sequentially arranged in the lower tower body from bottom to top; a sieve plate, a desulfurization liquid outlet and a foam collecting device are sequentially arranged in the upper tower body from bottom to top; a 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 is located below the sieve plate, and the desulfurization liquid pipe is connected with a pipeline at the bottom of the lower tower body.

[0008] Further, the gas distributor is a double-row sheet type gas distributor.

[0009] Further, the mist catching device comprises a cyclone plate mist catcher, and the cyclone plate of the cyclone plate mist catcher is of an upward rotation type structure.

[0010] Further, the desulfurization liquid distribution device is composed of a primary distribution groove and a secondary distribution groove, the top of the primary distribution groove is connected with the bottom of the desulfurization liquid outlet, and the bottom of the primary distribution groove is connected with the secondary distribution groove.

[0011] The desulfurization liquid passes through the primary distribution groove and enters the secondary distribution groove, and is uniformly distributed to the lower filler.

[0012] Further, the sieve plate is a flat plate with uniform holes, the sieve plate is used for cutting and reducing the size of the floating bubbles, the surface of the sieve plate is more adhered with elemental sulfur, the flotation of the elemental sulfur is improved, and the stability of the sulfur foam layer is maintained.

[0013] Further, 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 fixedly connected with the ring plate, the ring plate is fixedly connected with the tower body in a downward inclination, the ring plate and the cylinder form 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 inside of the cylinder flows to the collecting groove through the top of the cylinder, is sent to a foam tank along the lowest point foam outlet, and is deposited in the foam tank when the collecting groove is observed.

[0015] Further, the desulfurization liquid outlet comprises a cylinder, a cone segment and a small cylinder which are sequentially connected from top to bottom; the cylinder is provided with a lattice type partition plate to form a primary separator; and the cone segment is provided with a cross type partition plate to form a secondary separator.

[0016] The primary separator completes gas-liquid separation, the secondary separator further separates gas and liquid, and the amount of air entrainment in the desulfurization liquid is reduced. The small cylinder extends into the primary distribution groove, and the desulfurization liquid after regeneration is directly distributed to complete the removal of hydrogen sulfide in the coal gas.

[0017] Further, the mist catching device comprises a cyclone plate mist catcher, and the cyclone plate of the cyclone plate mist catcher is of an upward rotation type structure.

[0018] Further, the mist capturing device further comprises a liquid collecting device, the liquid collecting device comprising a liquid collecting pipe and a liquid collecting cylinder, the liquid collecting pipe being fixedly connected to the inner wall of the liquid collecting cylinder.

[0019] Further, a plurality of bubble generators are horizontally fixedly connected to the tower wall of the upper tower body in a circumferential distribution, each of the bubble generators being obliquely arranged in a vortex shape.

[0020] Further, the bubble generator comprises a large straight pipe, a small straight pipe, a large taper pipe, a small taper pipe and a half-ring pipe; the half-ring pipe is fixedly connected to the outer wall of the large straight pipe and is connected to the compressed air pipe; the small straight pipe is connected to the small taper pipe, the large straight pipe is connected to the large taper pipe, one end of the small straight pipe is sleeved in the large straight pipe, the other end of the small straight pipe is connected to the desulfurization liquid pipe, and the small taper pipe is located at the half-ring pipe, wherein the large straight pipe is provided with through holes in a circumferential distribution; air enters the half-ring pipe, passes through the through holes into the inside of the large straight pipe, mixes with the desulfurization liquid sprayed by the small taper pipe, and continues to mix to generate bubbles through the large taper pipe.

[0021] A desulfurization regeneration method, specifically comprising the following steps:

[0022] 1) passing the coal gas into the gas distributor, and performing desulfurization on the desulfurization liquid in the filler in a reverse direction, so that the hydrogen sulfide in the coal gas is removed;

[0023] 2) passing the desulfurized coal gas upward through the mist capturing filler to preliminarily remove the desulfurization liquid mist droplets entrained in the coal gas, and further passing the coal gas through the cyclone plate mist catcher to further remove the desulfurization liquid entrained in the coal gas, and then passing the coal gas upward through the coal gas outlet to a next process;

[0024] 3) passing the desulfurization liquid downward along the filler to contact with the coal gas along the desulfurization tower, and finally entering the bottom space to pass through the desulfurization liquid pipe into the bubble generator;

[0025] 4) air and desulfurization liquid penetrate and collide with each other to be crushed into bubbles to generate a regeneration reaction, and the desulfurization liquid is regenerated;

[0026] 5) passing the desulfurization liquid upward into the sieve plate, and the sieve plate is used to cut and reduce the size of the floating bubbles;

[0027] 6) passing the desulfurization liquid upward into the desulfurization liquid outlet to pass through a primary separator to complete gas-liquid separation, and in a secondary separator, the gas-liquid continues to separate to reduce the air entrainment amount in the desulfurization liquid; the regenerated desulfurization liquid is directly distributed to remove the hydrogen sulfide in the coal gas;

[0028] 7) collecting the rising sulfur foam by the foam collecting groove, and discharging the sulfur foam by the foam outlet;

[0029] 8) the bottom of the upper tower body and the bottom of the lower tower body are both provided with a vent, and the vent is an extraction outlet of the desulfurization liquid containing high concentration of salts, a certain amount of the desulfurization liquid containing high concentration of salts is extracted to be sent to an acid making or salt extraction to ensure the desulfurization efficiency.

[0030] Compared with the prior art, the present application has the advantages of:

[0031] 1. The tower body of the present application is vertically arranged in an integrated structure, the upper part is used for regeneration, and the lower part is used for desulfurization. The gas bubble generator is connected to the upper tower body. The gas distributor, the filler, the desulfurization liquid distribution device, and the mist capturing 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.

[0032] At present, most of the desulfurization towers and regeneration towers use two independent towers, mainly using the high tower regeneration capacity of the regeneration tower. The present application uses a high-efficiency gas bubble generator to achieve regeneration effect in the upper regeneration tank by using compressed air and desulfurization liquid. It has the advantages of high efficiency, compactness, energy saving, small land occupation, good treatment effect, and strong adaptability.

[0033] 2. The multiple gas bubble generators are horizontally fixed on the tower wall of the upper tower body in a circumferential distribution. Each gas bubble generator is inclinedly arranged in a vortex shape. Moreover, the gas bubble generator is composed of a large straight pipe, a small straight pipe, a large conical pipe, a small conical pipe, and a half-ring pipe. Air enters the half-ring pipe, enters the inside of the large straight pipe through the through hole, mixes with the desulfurization liquid sprayed by the small conical section, and continues to mix to generate bubbles through the large conical pipe. The bubbles are fine and uniform, and form a vortex in the tower, achieving good regeneration effect.

[0034] 3. The present application simultaneously uses filler mist capturing and mist capturing device, and the mist capturing filler is located between the desulfurization liquid distribution device and the mist capturing device. The mist capturing device uses a cyclone plate to capture mist, achieving good mist capturing effect and greatly reducing the entrainment of desulfurization liquid in the coal gas.

[0035] 4. The desulfurization liquid outlet of the present application uses a two-stage separator. The primary separator completes gas-liquid separation, and the secondary separator further separates gas and liquid, reducing the amount of air entrainment in the desulfurization liquid. The bottom of the desulfurization liquid outlet extends into the primary distribution tank, and the regenerated desulfurization liquid is directly distributed to complete the removal of hydrogen sulfide in the coal gas. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a schematic front view of the structure of the present application.

[0037] Figure 2 It is a schematic front view of the structure of the present application. Figure 1

[0038] Figure 3 It is a schematic front view of the structure of the present application. Figure 1

[0039] Figure 4 It is a schematic front view of the structure of the present application. Figure 1

[0040] Figure 5 It is a schematic front view of the structure of the present application.​​​Figure 1 DD sectional view.

[0041] Figure 6 This is a schematic diagram of the sieve plate structure of the present invention.

[0042] Figure 7 This is a schematic diagram of the bubble generator structure of the present invention.

[0043] Figure 8 for Figure 7 EE sectional view.

[0044] In the picture:

[0045] 1-Body body 11-Upper head 111-Observation port 112-Exhaust gas outlet 12-Cylindrical body 121-Gas inlet 122-Gas outlet 123-Manhole 13-Lower head 131-First vent 132-Lower head cylinder 14-Middle head 141-Second vent

[0046] 2-Gas distributor

[0047] 3-Packaging 31-Packaging Support

[0048] 4-Desulfurization liquid distribution device 41 Primary distribution tank 42-Secondary distribution tank

[0049] 5-Mist-catching packing 51-Mist-catching packing support

[0050] 6-Mist eliminator 61-Supporting annular plate 62-Liquid collection device 621-Liquid collecting pipe 622-Liquid collecting cylinder 63-Swirl plate mist eliminator 631-Small cylinder 632-Large cylinder 633-Swirl plate

[0051] 7-sieve plate

[0052] 8-Desulfurization liquid outlet; 81-Large cylindrical body; 811-Grid-type baffle; 82-Conical section; 821-Cross-type baffle; 83-Small elongated cylindrical body; 84-Valve

[0053] 9-Foam Collection Device; 91-Foam Collection Cylinder; 92-Foam Outlet; 93-Inclined Ring Plate; 94-Spraying Device

[0054] 10-Desulfurization liquid circulation system; 101-Installation port; 102-Bubble generator; 103-Connecting pipe; 104-Desulfurization liquid main pipe; 105-Desulfurization liquid inlet; 106-Support; 107-Desulfurization liquid pump; 108-Desulfurization liquid outlet; 1021-Large straight pipe; 1022-Small straight pipe; 1023-Large tapered pipe; 1024-Small tapered pipe; 1025-Semi-circular pipe Detailed Implementation

[0055] In the following well description of the embodiments of the present application, for the purpose, technical solutions and advantages of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0057] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the description of the present application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form, and in addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, it means that the features, steps, operations, devices, components and / or their combinations are present.

[0059] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0060] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0061]

Example

[0062] like Figures 1-8 As shown, a desulfurization regeneration tower has a vertically arranged, integrated structure, with the upper part used for regeneration and the lower part for desulfurization. It includes a tower body 1, a gas distributor 2, packing material 3, a desulfurization liquid distribution device 4, a mist-catching packing material 5, a mist-catching device 6, a sieve plate 7, a desulfurization liquid outlet 8, a foam collection device 9, and a desulfurization liquid circulation system 10.

[0063] The tower body 1 is a vertically 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 located inside the circular cylinder 12 in the middle of the circular cylinder 12, dividing the circular cylinder 12 into upper and lower parts, thus dividing the desulfurization regeneration tower into two parts: the upper part is used for regeneration, and the lower part is used for desulfurization.

[0064] The upper head 11 is equipped with an observation port 111 and a tail gas outlet 112. The bottom of the outer side of the middle head 14 is equipped with a second vent 141, and the bottom of the outer side of the lower head 13 is equipped with a first vent 131. The bottom center of the inner side of the lower head 13 is equipped with a lower head cylinder 132. The lower desulfurization regeneration tower has a gas inlet 121 at the bottom and a gas outlet 122 at the top. The cylindrical body 12 of the lower desulfurization regeneration tower has manholes 123 evenly distributed vertically. The first vent 131 and the second vent 141 are outlets for extracting desulfurization liquid containing high concentrations of salt, extracting a certain amount of desulfurization liquid containing high concentrations of salt and sending it to acid production or salt extraction to ensure desulfurization efficiency.

[0065] 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 sequentially arranged in the lower circular cylinder 12 from bottom to top.

[0066] The gas distributor 2 is a double-row fin type gas distributor, and the gas distributor 2 is connected with the coal gas inlet 121. The filler support 31 is fixedly connected in the circular cylinder 12, and the filler 3 is placed on the filler support 31.

[0067] The desulfurization liquid distribution device 4 is composed of a first distribution groove 41 and a second distribution groove 42. The first distribution groove 41 is connected with the bottom of the desulfurization liquid outlet 8, and the bottom of the first distribution groove 41 is connected with the second distribution groove 42. The desulfurization liquid enters the second distribution groove 42 through the first distribution groove 41, and is uniformly distributed to the lower filler 3.

[0068] 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.

[0069] As shown in Figure 1 , Figure 5 , the mist catching device 6 includes a support ring plate 61, a liquid collecting device 62 and a cyclone plate mist catcher 63. The support ring plate 61 is horizontally fixedly connected to the inner wall of the circular cylinder 12, and a plurality of cyclone plate mist catchers 63 are circumferentially and uniformly fixed to the bottom surface of the support ring plate 61. In the embodiment, the cyclone plate mist catchers 63 are six.

[0070] The cyclone plate mist catcher 63 includes a small cylinder 631, a large cylinder 632 and a cyclone plate 633. The small cylinder 631 is inside and the large cylinder 632 is outside, and the cyclone plate 633 is fixed to the bottom plate of the large cylinder 632. The cyclone plate 633 is an upward rotation type structure. After the coal gas carrying the desulfurization liquid is rotated, the liquid moves upward along the large cylinder 632, collides with the small cylinder 631 and the support ring plate 61, moves downward, flows downward by gravity, and is discharged through the liquid collecting device 62 to remove the desulfurization liquid carried in the coal gas.

[0071] The liquid collecting device 62 includes a liquid collecting pipe 621 and a liquid collecting cylinder 622, and 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 support ring plate 61 or the bottom plate of the large cylinder 632. The desulfurization liquid collected by the liquid collecting device 62 enters the lower filler after full flow, and also plays a liquid sealing role.

[0072] As shown in Figure 1 , 6 , the sieve plate 7 is a flat plate with uniform holes. The sieve plate 7 is used to cut and reduce the size of the floating bubbles, and the surface adheres more elemental sulfur, improves the flotation of elemental sulfur, and maintains the stability of the sulfur foam layer.

[0073] The desulfurization liquid outlet 8 comprises a large cylinder 81, a taper section 82 and a small long cylinder 83 connected in sequence from top to bottom. The large cylinder 81 is fixed to the inner wall of the circular cylinder 12 through a support plate. The small long cylinder 83 passes through the sieve plate 7, the middle head 14, the support ring plate 61 and the mist-catching filler 5 in sequence, extends into the primary distribution groove 41, and the desulfurization liquid after regeneration is directly distributed to complete the removal of hydrogen sulfide in the coal gas.

[0074] The large cylinder 81 is provided with a lattice-type baffle 811 to form a primary separator. The taper section 82 is provided with a cross-type baffle 821 to form a secondary separator. The primary separator completes gas-liquid separation, and the secondary separator further separates gas and liquid to reduce the amount of air entrained in the desulfurization liquid.

[0075] The foam collecting device 9 comprises a foam collecting cylinder 91, a foam outlet 92, an inclined 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 inclined ring plate 93. The inclined ring plate 93 is fixed to the circular cylinder 12 in a downward inclined manner in the horizontal direction. The inclined ring plate 93 and the foam collecting cylinder 91 form 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.

[0076] Sulfur foam rising from the inside of the foam collecting cylinder 91 flows to the foam collecting groove through the top of the foam collecting cylinder 91, and is discharged outside along the low-point foam outlet 92. When it is found that there is deposited sulfur foam in the foam collecting groove through the observation hole 111, the spraying device 94 is opened, and the deposited sulfur foam is discharged outside through the foam outlet 92.

[0077] The valve 84 is arranged in the small long cylinder 83 to control the flow of desulfurization liquid in the small long cylinder 83. The sulfur foam condition is observed through the top observation hole 111 to ensure that the sulfur foam flows out through the foam collecting device 9 and reduce the sulfur content in the desulfurization lean liquid.

[0078] As shown in Figure 1 , Figure 7 , Figure 8 , the desulfurization liquid circulating system 10 comprises a mounting port 101, a bubble generator 102, a connecting pipe 103, a desulfurization liquid main pipe 104, a desulfurization liquid inlet 105, a support 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. The desulfurization liquid inlet 105 is connected to the desulfurization liquid main pipe 104. The desulfurization liquid main pipe 104 is connected to the bubble generator 102 through the connecting pipe 103.

[0079] The desulfurization liquid at the bottom of the desulfurization tower is separated from some particles outside the lower head cylinder 132, and then flows to the inside of the lower head cylinder 132, passes through the desulfurization liquid outlet 108, is pumped to the desulfurization liquid main pipe 104 by the desulfurization liquid pump 107, and then passes through the bubble generator 102. The desulfurization liquid is mixed with air, and regeneration is performed in the space below the sieve plate 7.

[0080] The plurality of bubble generators 102 are horizontally fixed on the outer wall of the circular cylinder 12 through the mounting port 101 and the bracket 106, and are circumferentially distributed. Each bubble generator 102 is inclined and arranged in a vortex shape. In this embodiment, there are eight bubble generators 102. When the eight bubble generators 102 are arranged, the gas-liquid mixed desulfurization liquid is pushed and collided with each other to form a vortex flow, thereby further strengthening the regeneration of the desulfurization liquid.

[0081] The bubble generator 102 includes a large straight pipe 1021, a small straight pipe 1022, a large taper pipe 1023, a small taper pipe 1024, and a half-ring pipe 1025. The half-ring pipe 1025 is fixed to the outer wall of the large straight pipe 1021, and is connected with the compressed air pipe. The small straight pipe 1022 is connected with the small taper pipe 1024, and the large straight pipe 1021 is connected with the large taper pipe 1023. One end of the small straight pipe 1022 is sleeved in the large straight pipe 1021, and the other end of the small straight pipe 1022 is connected with the desulfurization liquid main pipe 104 through a flange and a connecting pipe 103. The small taper pipe 1024 is located at the half-ring pipe 1025, and the large straight pipe 1021 has through holes circumferentially distributed at this position. Air enters the half-ring pipe 1025, enters the inside of the large straight pipe 1021 through the through holes, is mixed with the desulfurization liquid sprayed by the small taper pipe 1024, and continues to be mixed to generate bubbles through the large taper pipe 1023. The bubbles are fine and uniform, form a vortex in the tower, and have good regeneration effect.

[0082] A desulfurization regeneration method is as follows:

[0083] Coal gas enters the tower through the coal gas inlet 121, is uniformly distributed along the circular cylinder 12 by the double-row plate gas distributor 2, and is desulfurized in the reverse direction with the uniformly distributed desulfurization liquid in the packing 3. Hydrogen sulfide in the coal gas is removed. The desulfurized coal gas passes through the mist-catching packing 5, preliminarily removes the desulfurization liquid mist droplets entrained in the coal gas, continues to pass through the cyclone plate mist catcher 63, further removes the desulfurization liquid entrained in the coal gas, and then passes upwardly through the coal gas outlet 122 to be sent to the next process.

[0084] The desulfurization liquid contacts with the coal gas along the packing 3 downwardly along the desulfurization tower, and finally enters the bottom space. The desulfurization liquid fills the collection space, flows to the inside of the lower head cylinder 132 through the top of the lower head cylinder 132, passes through the desulfurization liquid outlet 108, is pumped to the desulfurization liquid main pipe 104 by the desulfurization liquid pump 107, and then enters the bubble generator 102.

[0085] The desulfurization liquid is jetted at high speed by the small conical pipe 1024, the compressed air is uniformly opened by the large straight pipe 1021, enters the inside of the large straight pipe 1021, and is cut by the desulfurization liquid jetted by the small conical pipe 1024 at the outlet end of the small conical pipe 1024, to form a turbulent flow, which is beneficial to bubble generation, the gas and the liquid penetrate and collide with each other in the inside of the large straight pipe 1021, the high-speed flowing liquid transmits energy to the air, so that the air is accelerated and compressed, the air is crushed into bubbles with small diameters, when passing through the large conical pipe 1023, the speed is increased again, the air is further compressed, and the jetted gas-liquid mixture presents a dense foam flow state, and a regeneration reaction has been generated, at the outlet of the large conical pipe 1023, the speed of the desulfurization liquid and the compressed air is reduced, and the regeneration reaction continues to occur.

[0086] The bubble generator 102 is arranged to be inclined at a certain angle along the horizontal direction, the desulfurization liquid after being mixed with the gas forms a vortex flow by mutual pushing and colliding, and the regeneration of the desulfurization liquid is further strengthened. The desulfurization liquid enters the sieve plate 7 upwards, the sieve plate 7 is used for cutting the upfloating bubbles to be small, the surface adhered elemental sulfur is more, the flotation of the elemental sulfur is improved, and the sulfur foam layer is kept stable.

[0087] The desulfurization liquid enters the desulfurization liquid outlet 8 upwards, passes through a primary separator, and completes gas-liquid separation; in a secondary separator, the gas-liquid continues to be separated, and the air entrainment amount in the desulfurization liquid is reduced. The regenerated desulfurization liquid is directly distributed, and the removal of hydrogen sulfide in the coal gas is completed.

[0088] The sulfur foam rising from the inside of the foam collecting cylinder 91 flows to the foam collecting groove through the top of the foam collecting cylinder 91, and is discharged along the low point foam outlet 92. When the foam collecting groove has deposited sulfur foam by observing the observation port 111, the spraying device 94 is opened to discharge the deposited sulfur foam. The first vent 131 and the second vent 141 are high-concentration salt-containing desulfurization liquid extraction outlets, a certain amount of high-concentration salt-containing desulfurization liquid is extracted and sent to acid making or salt extraction, so as to ensure the desulfurization efficiency.

[0089] At present, most of the desulfurization towers and regeneration towers adopt two independent towers, mainly using the high tower regeneration capacity of the regeneration tower, and the high-efficiency bubble generator is adopted in the present application, compressed air and desulfurization liquid are used in the upper regeneration groove to achieve the regeneration effect, the tower body is vertically arranged, and the tower body is a one-piece structure, the upper part is used for regeneration, and the lower part is used for desulfurization. The present application has the advantages of high efficiency, compactness, energy saving, small occupation, good treatment effect and strong adaptability.

[0090] The novel bubble generator 102 is adopted in the present application, the bubble generator 102 is horizontally fixed on the tower wall of the upper tower body in a circumferential distribution mode, each bubble generator 102 is arranged to be inclined, and forms a vortex shape; the bubbles are fine and uniform, and a vortex is formed in the tower, and the regeneration effect is good.

[0091] The present application simultaneously adopts the mist capturing filler 5 and the mist capturing device 6, and the mist capturing filler 5 is located between the desulfurization liquid distribution device 4 and the mist capturing device 6, the mist capturing device 6 adopts the cyclone plate mist capturing, the mist capturing effect is good, and the desulfurization liquid entrainment in the coal gas can be greatly reduced.

[0092] The desulfurization liquid outlet 8 of the present application adopts two-stage separators, the primary separator completes the gas-liquid separation, the secondary separator continues to separate the gas-liquid here, and the air entrainment amount in the desulfurization liquid is reduced. The small cylinder body extends into the primary distribution groove, and the desulfurization liquid after regeneration is directly distributed to complete the removal of hydrogen sulfide in the coal gas.

[0093] The above is only part of the specific embodiments of the present application, the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A desulfurization regenerator, characterized in that: the tower body of the desulfurization regenerator is vertically arranged and is of an integrated structure, the upper part of which is used for regeneration and the lower part of which is used for desulfurization; a gas distributor, a filler, a desulfurization liquid distribution device and a mist catching device are sequentially arranged in the lower tower body from bottom to top; a sieve plate, a desulfurization liquid outlet and a foam collecting device are sequentially arranged in the upper tower body from bottom to top; a desulfurization liquid circulation 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 is located below the sieve plate, and the desulfurization liquid pipe is connected with a pipeline at the bottom of the lower tower body; a plurality of bubble generators are horizontally fixed on the tower wall of the upper tower body in a circumferential distribution manner, and each bubble generator is arranged in an inclined manner and in a vortex shape; the bubble generator comprises a large straight pipe, a small straight pipe, a large taper pipe, a small taper pipe and a half-ring pipe; the half-ring pipe is fixed to the outer wall of the large straight pipe and is connected with a compressed air pipe; the small straight pipe is connected with the small taper pipe, the large straight pipe is connected with the large taper pipe, one end of the small straight pipe is sleeved in the large straight pipe, the other end of the small straight pipe is connected with the desulfurization liquid pipe, the small taper pipe is located at the half-ring pipe, and the large straight pipe is provided with through holes in a circumferential distribution manner at the half-ring pipe; air enters the half-ring pipe, enters the inside of the large straight pipe through the through holes, mixes with the desulfurization liquid sprayed by the small taper section, and continues to mix through the large taper pipe to generate bubbles.

2. The desulfurization regenerator according to claim 1, characterized in that: it further comprises mist catching fillers, which are located between the desulfurization liquid distribution device and the mist catching device.

3. The desulfurization regenerator 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 with the bottom of the desulfurization liquid outlet, and the bottom of the primary distribution tank is connected with the secondary distribution tank.

4. The desulfurization regenerator 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 to the ring plate, the ring plate is fixed to the tower body in an inclined downward manner, the ring plate and the cylinder form a foam collecting groove, and the foam outlet is located at the lowest point of the foam collecting groove.

5. The desulfurization regenerator according to claim 1, characterized in that: the desulfurization liquid outlet comprises a cylinder, a taper section and a small cylinder which are sequentially connected from top to bottom; the cylinder is provided with a lattice type partition plate inside, forming a primary separator; the taper section is provided with a cross type partition plate inside, forming a secondary separator.

6. The desulfurization regenerator according to claim 1, characterized in that: the mist catching device comprises a cyclone plate mist catcher, and the cyclone plate of the cyclone plate mist catcher is of an upward rotation type structure.

7. The desulfurization regenerator according to claim 6, characterized in that: the mist catching device further comprises a liquid collecting device, which comprises a liquid collecting pipe and a liquid collecting cylinder, and the liquid collecting pipe is fixed to the inner wall of the liquid collecting cylinder.

8. A desulphurization regeneration method, implemented on the basis of a desulphurization regeneration tower according to any one of claims 1 to 7, characterized in that, Specifically comprising the following steps: 1) introducing the coal gas into the gas distributor, and performing desulfurization on the coal gas and the desulfurization liquid in the filler in a reverse direction, so that the hydrogen sulfide in the coal gas is removed. 2) The desulfurized gas passes through the mist capturing packing upward, preliminarily removes the desulfurizing liquid droplets entrained in the gas, the gas continues to pass through the cyclone plate mist eliminator, further removes the desulfurizing liquid entrained in the gas, and then passes upward through the gas outlet to the next process; 3) The desulfurizing liquid contacts with the gas along the packing downward along the desulfurizing tower, and finally enters the bottom space and passes through the desulfurizing liquid pipe into the bubble generator; 4) The air and the desulfurizing liquid are interpenetrated and collided, are crushed into bubbles, and a regeneration reaction occurs, and the desulfurizing liquid is regenerated; 5) The desulfurizing liquid enters the sieve plate upward, and the sieve plate is used to cut and reduce the floating bubbles; 6) The desulfurizing liquid enters the desulfurizing liquid outlet upward, and the gas-liquid separation is completed through the primary separator; in the secondary separator, the gas-liquid continues to separate, and the air entrainment amount in the desulfurizing liquid is reduced; the regenerated desulfurizing liquid is directly distributed to remove the hydrogen sulfide in the gas; 7) The rising sulfur foam is collected by the foam collecting tank and is discharged by the foam outlet; 8) The upper tower body bottom and the lower tower body bottom are both provided with a vent, and the vent is a high-concentration salt desulfurizing liquid extraction outlet, a certain amount of high-concentration salt desulfurizing liquid is extracted and sent to acid making or salt extraction, and the desulfurization efficiency is ensured.

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