Oil-saving anti-blocking benzene washing tower

Abstract

The invention belongs to the technical field of packed towers, and particularly relates to an oil-saving anti-blocking benzene washing tower. The top of the tower body is provided with a gas outlet, the side surface of the upper part of the tower body is provided with a lean oil inlet, the lower part of the tower body is provided with a rich oil outlet, a liquid distributor is arranged below the lean oil inlet, and a gas inlet is arranged above the rich oil outlet; at least three filler layers are arranged between the liquid distributor and the coal gas inlet, and a redistributor is arranged between every two adjacent filler layers; and fillers of at least three filler layers are combined fillers. The benzene washing tower is used for solving the technical problems that the middle and lower packing layers of the benzene washing tower in the prior art are easy to block and the washing oil consumption is too large.

Description

Technical Field

[0001] The present invention belongs to the technical field of packed towers, and particularly relates to an oil-saving and anti-blocking benzene scrubbing tower. Background Art

[0002] Coke oven gas contains rich chemical products, among which the benzene homologues content is 25 - 40 g / m³. The benzene homologues are valuable chemical raw materials with high value. In recent years, the coking industry has faced a severe situation of overcapacity and a serious price inversion of coking coal. The entire industry has fallen into deep losses. The recycling of chemical products has become the key to increasing the efficiency and reducing the losses of enterprises. Among them, the production of crude benzene with the highest price is the key of the key, and its production status directly affects the economic benefits of enterprises.

[0003] At present, the atmospheric wash oil absorption method is the mainstream process for recovering crude benzene from coke oven gas, and its core equipment is the benzene scrubbing tower. The benzene scrubbing tower is generally a packed tower. The gas enters the benzene scrubbing tower from the lower part and contacts countercurrently with the recycled wash oil after debenzylation sprayed from the upper part of the tower. The benzene homologues are physically absorbed by the recycled wash oil, and the gas is sent out from the top of the benzene scrubbing tower.

[0004] Previously, the scale of coking plants was small and the gas volume was not large. Therefore, the smaller benzene scrubbing towers did not have an inlet distributor, nor a redistributor, or only one layer of distribution cones was set to reduce the wall flow effect. The upper wash oil feeding device was originally a shower head and later changed to a nozzle. The demisting device at the top most uses a wire mesh demister or a randomly stacked packing layer of flower rings.

[0005] For the benzene scrubbing tower designed as above, firstly, the tower resistance is several times the designed pressure drop, resulting in a large power consumption and increasing the operating cost; secondly, the crude benzene recovery efficiency is also far lower than the designed value, which causes a great waste of resources on the one hand and reduces the income of the coking plant on the other hand; finally, the unreasonable design of the wash oil feeding device and the demisting layer makes the wash oil easily carried out of the benzene scrubbing tower by the gas, increasing the meaningless consumption of wash oil and raising the operating cost of the enterprise.

[0006] Therefore, it is of great significance and value to research and design a new type of anti-blocking and oil-saving high-efficiency benzene scrubbing tower suitable for current large-scale coking plants. Summary of the Invention

[0007] The present invention provides an oil-saving and anti-blocking benzene scrubbing tower to solve the technical problems of easy blockage of the middle and lower packing layers and excessive wash oil consumption existing in the existing benzene scrubbing tower. The present invention includes: a tower body. A gas outlet is provided at the top of the tower body, a lean oil inlet is provided on the upper side surface, a rich oil outlet is provided at the lower part, a liquid distributor is provided below the lean oil inlet, and a gas inlet is provided above the rich oil outlet; At least three packing layers are provided between the liquid distributor and the gas inlet, and a redistributor is provided between adjacent packing layers; The packing materials of at least three of the said packing layers are combined packing materials.

[0008] In the present invention, the wash oil enters the interior from the upper part of the tower body through a liquid distributor, and the wash oil is evenly distributed on the internal cross-section of the tower body below the liquid distributor without forming fine droplets and being ejected by a large amount of gas. Moreover, the combined packing material can increase the flux in the middle and lower layers and increase the specific surface area in the upper layer, and has good anti-blocking performance.

[0009] Furthermore: The liquid distributor includes: a support ring, the outer side of the support ring is welded to the tower body, and a plurality of rib plates are evenly distributed in a circular pattern on the bottom surface of the support ring, and a plurality of groups of connection holes are opened on the support ring; A plurality of spray troughs, the positions of the plurality of spray troughs correspond to the positions of the plurality of groups of connection holes one by one, fixing holes are opened at both ends of the spray trough corresponding to the positions of the connection holes, and baffles are arranged inside the fixing holes; At least two distribution troughs, the distribution troughs are arranged above the plurality of spray troughs, and a plurality of through holes are opened in the distribution troughs corresponding to the positions of the spray troughs; The lean oil inlet is a straight pipe passing through the tower body, and elbows corresponding to the number and positions of the distribution troughs are arranged at the ends of the straight pipe, and the elbows extend into the distribution troughs respectively. The beneficial effect of this step: The wash oil is evenly distributed on the internal cross-section of the tower body through the distribution troughs and the spray troughs.

[0010] Furthermore: Spray holes are opened on the side surface or the bottom surface of the spray trough; The spray holes are dot-shaped array holes or strip-shaped array holes; Overflow ports are also opened on the upper edges of the spray troughs. The beneficial effect of this step: Strengthen the ability of the liquid distributor to evenly distribute the wash oil.

[0011] Furthermore: The redistributor is a detachable trough-tray type liquid distributor. The beneficial effect of this step: Further correct the uneven fluid distribution inside the tower body through the redistributor.

[0012] Furthermore: The packing layer includes a packing support and packing materials, and the packing materials are arranged on the packing support; The packing support includes a load-bearing structure and a grille, the grille is divided into a plurality of grid plates, and the plurality of grid plates are combined on the load-bearing structure. The beneficial effect of this step: Provide support for the packing materials through the packing support.

[0013] Furthermore: The load-bearing structure includes a support ring, reinforcing rib plates, ear brackets and support beams. A plurality of evenly distributed reinforcing rib plates are arranged below the support ring, and the support ring and the reinforcing rib plates are welded to the inner wall of the tower body; Several groups of the ear supports are arranged in pairs, welded to the inner wall of the tower body, and below the support ring. A support beam is provided between each pair of ear supports.

[0014] Beneficial effects of this step: Ensure the structural strength when the grille supports the packing through the reasonable design of the load-bearing structure, so as to ensure good supporting effect on the packing.

[0015] Furthermore: The material of the combined packing is light porcelain and stainless steel. Beneficial effects of this step: It can provide good wetting performance, thermal sensitivity, corrosion resistance, mechanical strength, etc.

[0016] Furthermore: A gas distribution device is provided at the position of the gas inlet. The gas distribution device includes a primary gas distributor and a secondary gas distributor; The primary gas distributor includes a top plate. The two ends of the top plate are welded to the inner wall of the tower body, and one end of the top plate close to the gas inlet is the wide end, and the end far from the gas inlet is the narrow end; Several arc-shaped drainage plates are symmetrically and evenly distributed on both sides of the bottom surface of the top plate; The secondary gas distributor is arranged above the primary gas distributor. Beneficial effects of this step: Reduce the unevenness of gas inlet of large-scale tower equipment through the primary and secondary gas distributors, make the gas flow velocity more consistent and the distribution more uniform on the cross-section of the tower body above the gas distribution device.

[0017] Furthermore: A bottom plate is provided below the arc-shaped drainage plate. The shape of the bottom plate is the same as that of the top plate. Beneficial effects of this step: Improve the structural strength of the primary gas distributor through the bottom plate.

[0018] Furthermore: A drain port is provided at the bottom of the tower body, and an anti-vortex plate is provided at the drain port. Beneficial effects of this step: Use the anti-vortex plate to reduce the vortex at the drain port and improve the safety of the equipment.

[0019] The beneficial effects of the present invention are: The present invention adopts combined packing, gas distribution device, liquid distribution device and multi-layer redistributors, which can significantly improve the anti-blocking performance of the benzene scrubbing tower, reduce the resistance during long-term operation, reduce the consumption of wash oil during benzene scrubbing, improve the production stability of the benzene scrubbing process, better adapt to the new situation of the increasing large-scale of current coking enterprises while ensuring the crude benzene recovery rate, and ultimately reduce the operation cost of coking enterprises and improve economic benefits. Description of the Drawings

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Structural schematic diagram of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 2 Partial structural schematic of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention Figure 1 ; Figure 3 Structural schematic diagram of the liquid distributor in an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 4 Top view of the liquid distributor in an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 5 Top view of the distribution tank of the liquid distributor in an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 6 Structural schematic diagram of the lean oil inlet in an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 7 Partial structural schematic of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention Figure 2 ; Figure 8 Structural schematic diagram of the packing support of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 9 Top view of the packing support of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 10 Top view of a partial packing support of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 11 Partial structural schematic of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention Figure 3 ; Figure 12 Top view of the gas primary distributor of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 13 Structural schematic diagram of the gas primary distributor of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 14 Structural schematic diagram of the anti-vortex plate of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention; Figure 15 Cross-sectional structural schematic diagram of the anti-vortex plate of an oil-saving and anti-blocking benzene scrubber tower provided by the present invention.

[0022] Reference numerals: 1 - Tower body; 2 - Liquid distributor; 3 - Packing layer; 4 - Redistributor; 5 - Primary gas distributor; 6 - Mist-catching packing layer; 7 - Inclined bottom; 8 - Lean oil inlet pipe; 9 - Anti-vortex plate; 10 - Secondary gas distributor 21 - Support ring; 22 - Rib plate; 23 - Spray trough; 24 - Distribution trough; 31 - Packing support; 32 - Packing; 51 - Top plate; 52 - Arc-shaped drainage plate; 53 - Bottom plate; 81 - Straight pipe; 82 - Elbow pipe; 91 - Cover plate; 92 - Rib plate 311 - Packing support ring; 312 - Support ring rib plate; 313 - Grid plate; 314 - Ear support; 315 - Support beam a - Coal gas inlet; b - Coal gas outlet; c - Lean oil inlet; d - Rich oil outlet Detailed implementation manners

[0023] The embodiments of the technical solution of the present invention will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention. It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0024] As shown in the embodiments of the present invention Figures 1 to 15 A fuel-saving and anti-blocking benzene scrubbing tower is provided, which can effectively achieve the effects of fuel saving and anti-blocking, and achieve the purpose of improving the crude benzene recovery rate and reducing the production cost.

[0025] The present invention includes: a tower body 1, a coal gas outlet b is provided at the top of the tower body 1, a lean oil inlet c is provided on the upper side, a rich oil outlet d is provided at the lower part, a liquid distributor 2 is provided below the lean oil inlet c, a coal gas inlet a is provided above the rich oil outlet d. Lean oil refers to wash oil with less benzene hydrocarbons, and rich oil refers to wash oil with more benzene hydrocarbons. Wash oil can absorb more benzene hydrocarbons; in the benzene scrubbing tower, coal gas and wash oil flow in opposite directions, having good mass transfer efficiency; At least three packing layers 3 are provided between the liquid distributor 2 and the coal gas inlet a. Generally, four to five packing layers 3 are arranged. The specific number is determined according to the type selection of the benzene scrubbing tower and the benzene content in the coal gas after the tower. Then a redistributor 4 is provided between adjacent packing layers 3. The function of the redistributor 4 is to correct the poor distribution of the fluid volume in the tower, correct the poor distribution of the fluid concentration in the tower, and the redistributor has the dual functions of both uniform distribution and mixing, and mixing is more important than uniform distribution; because of the poor distribution of the concentration in the packing layer 3, it is difficult to be eliminated during the flow process. A good redistributor 4 should make the fluid fully mixed and redistributed evenly on the tower cross-section; At least three fillers 32 of the filler layers 3 are combined fillers. Specifically, the lower-middle filler layer 3 is selected to use large-hole high-flux structured fillers to cope with the deposition of various impurities carried in the coal gas and wash oil, improve the anti-blocking performance, and facilitate the long-term stable operation of the benzol scrubber; the upper-middle filler layer 3 is selected to use structured fillers with high mass transfer efficiency and low pressure drop to improve the benzol scrubbing effect and the crude benzol recovery rate. The selection of combined fillers can make the best use of their advantages and avoid their disadvantages, achieving better balance in two aspects: efficient recovery of crude benzol and anti-blocking ability for long-term use. Among them, the structured fillers with high mass transfer efficiency and low pressure drop can be selected as corrugated orifice plates, and the gaps between adjacent corrugated orifice plates are not aligned, preferably arranged by rotating 45°.

[0026] In the present invention, the wash oil enters the interior from the upper part of the tower body 1 through the liquid distributor 2 and is evenly dispersed without forming fine droplets and being largely ejected by the coal gas. Moreover, the combined filler can increase the flux in the middle and lower layers and the specific surface area in the middle and upper layers, having good anti-blocking performance and mass transfer efficiency.

[0027] Based on the above technical solution, as Figures 3 to 6 shown, the liquid distributor 2 includes: a support ring 21, the outer side of the support ring 21 is welded to the tower body 1, and a plurality of rib plates 22 are annularly and evenly distributed on the bottom surface of the support ring 21, and a plurality of groups of connection holes are formed in the support ring 21; a plurality of spray troughs 23, the positions of the plurality of spray troughs 23 correspond to the positions of the plurality of groups of connection holes one by one, fixing holes are formed at both ends of the spray trough 23 corresponding to the positions of the connection holes, and baffles are arranged inside the fixing holes; at least two distribution troughs 24, the distribution troughs 24 are arranged above the plurality of spray troughs 23, and a plurality of through holes are formed in the distribution troughs 24 corresponding to the positions of the spray troughs 23; The lean oil inlet c is a lean oil inlet pipe 8, which includes a straight pipe 81 passing through the tower body 1, and the end of the straight pipe 81 is provided with elbow pipes 82 corresponding to the number and position of the distribution tanks 24. The ends of the elbow pipes 82 extend into the distribution tanks 24 respectively. The washing oil pumped into the tower from the lean oil inlet pipe 8 is input into the distribution tanks 24 through the elbow pipes 82. Due to the non-sealed connection between the elbow pipes 82 and the distribution tanks 24, part of the kinetic energy of the washing oil entering the distribution tanks 24 will be lost. Under the action of its own gravity, the washing oil flows from the distribution tanks 24 to the spray tank 23, and then drips from the spray tank 23 onto the packing layer 3 below, and finally disperses on the packing surface to form a liquid film, making it difficult to form droplets. The self-weight of the droplets during the dripping process can overcome the pressure of the gas blown from below, and will not be carried out of the benzol scrubber mixed in the gas like droplets. Therefore, the consumption of the washing oil can be effectively reduced. The distribution tanks 24 and the spray tank 23 are vertically arranged, and a pair of distribution tanks 24 can symmetrically distribute the washing oil into different spray tanks, and the washing oil is evenly distributed inside the tower body 1 through the distribution tanks 24 and the spray tank 23. Compared with the feeding distribution devices such as nozzles and shower heads, the generation of droplets can be greatly reduced.

[0028] Considering that the middle spray tank is the longest and gradually becomes shorter towards both sides, the through holes on the distribution tank 24 are opened in a gradually changing trend with a larger diameter in the middle and smaller diameters at both ends to ensure the even distribution of the liquid inside the tower body.

[0029] On the basis of the above technical solution, spray holes are opened on the side or bottom surface of the spray tank 23; The spray holes are dot-shaped array holes or strip-shaped array holes. The dot-shaped array holes are an array of several small-flux holes, and the hole shapes include but are not limited to round holes, square holes, star-shaped holes, triangular holes or other special-shaped holes, etc. The strip-shaped array holes are several large-flux holes, and the hole shapes include but are not limited to waist-round holes or annular holes, etc.; the array distances of the above array holes can be close or far, and the array forms can be rectangular array, linear array or circular array, etc.; An overflow port is also opened on the upper edge of the spray tank 23. The overflow ports are adjacent or connected and cover the upper edge. The overflow port is a notch, and the shape and number of the notches are not limited. The overflow port can evenly overflow from the spray tank 23 when the washing oil fills the spray tank 23; Through the above parallel arrangement of the spray tank 23 and the opened spray holes and overflow ports, the washing oil can be more evenly distributed.

[0030] On the basis of the above technical solution, the redistributor 4 is a detachable trough tray type liquid distributor. The detachable trough tray type liquid distributor is convenient for installation, disassembly, and is more conducive to later maintenance and replacement.

[0031] On the basis of the above technical solution, as Figures 8 to 10 shown, the packing layer 3 includes a packing support 31 and packings 32, and the packings 32 are arranged on the packing support 31; The packing support 31 includes a load-bearing structure and a grille. The grille is divided into several grille plates 313, and several of the grille plates 313 are combined on the load-bearing structure. The grille plates 313 can have various specifications. Taking the axis of the cross-section of the tower body 1 as the boundary, it is equally divided into two semi-circles, and then the semi-circle is divided into several pieces. Taking Figure 9 and Figure 10 as an example, there are 20 grille plates 313 in total, 10 on each side. And each semi-circle is divided into 10 pieces. Each grille plate 313 includes the same number of grille boards, an arc plate at the head end and a flat plate at the tail end. And several limiting plates for fixing the distance between the grille boards are provided on the top surface of the grille boards. Through the designed structure of the grille plates 313, the supporting capacity for the packing 32 can be greatly improved, and at the same time, the channel area required for fluid flow is ensured.

[0032] On the basis of the above technical solution, the load-bearing structure includes a packing support ring 311. The packing support ring 311 is sleeved outside the grille. A number of support ring stiffeners 312 are evenly distributed in a ring shape below the packing support ring 311. The support ring stiffeners 312 are welded to both the packing support ring 311 and the inner wall of the tower body 1 at the same time. The support ring stiffeners 312 are used to connect the packing support ring 311 and the tower body 1. A number of pairs of ear racks 314 are provided below the packing support ring 311, and the ear racks 314 are welded to the inner wall of the tower body 1; For the pairs of ear racks 314 arranged in pairs, a support beam 315 is provided between each pair. The support ring 311 and the support beam 315 jointly support the grille. And the support beam 315 is perpendicular to the grille boards in the grille plates 313. The support beam 315 generally selects a steel section with a large sectional modulus and strong bending resistance or a similar steel structure. Through the support beam 315, the bearing capacity of the grille plates 313 is further improved, and the deformation of the grille plates 313 can be effectively prevented.

[0033] On the basis of the above technical solution, the material of the combined packing is light porcelain and stainless steel, which can provide good wetting performance, thermal sensitivity, corrosion resistance, mechanical strength, etc.

[0034] On the basis of the above technical solution, Figures 11 to 13 As shown, a gas distribution device is provided at the position of the gas inlet a. The gas distribution device includes a primary gas distributor 5 and a secondary gas distributor 10. The primary gas distributor 5 includes a top plate 51. The two ends of the top plate 51 are welded to the inner wall of the tower body 1. And one end of the top plate 51 close to the gas inlet a is the wide end, and the end far from the gas inlet a is the narrow end; On both sides of the bottom surface of the top plate 51, a number of arc-shaped drainage plates 52 are symmetrically and evenly distributed; the gas redistributor 10 is arranged above the gas primary distributor 5. By combining the gas primary distributor 5 and the gas redistributor 10, the unevenness of the inlet gas of the large tower is reduced, making the gas flow velocity more consistent and the distribution more uniform on the cross-section of the tower body above the gas distribution device. In addition, the gas redistributor 10 can be a packing or a grid; below the gas primary distributor 5 is an inclined bottom 7, which is mainly used to collect wash oil. Flange ports are provided above and below the low part of the inclined bottom 7, and the flange ports are connected to a U-shaped pipe. The wash oil forms a liquid seal in the U-shaped pipe, which can prevent the gas from entering the liquid storage section, and then the wash oil enters the liquid storage section below the inclined bottom 7.

[0035] On the basis of the above technical solution, a bottom plate 53 is provided below the arc-shaped drainage plate 52, and the shape of the bottom plate 53 is the same as that of the top plate 51, and the structural strength of the gas primary distributor 5 is improved through the bottom plate 53.

[0036] On the basis of the above technical solution, a drain port is provided at the bottom of the tower body 1, and an anti-vortex plate 9 is provided at the drain port. The anti-vortex plate 9 includes three equally divided rib plates 92 and a cover plate 91 on the rib plates 92, and the anti-vortex plate 9 is used to reduce the vortex at the drain port and improve the safety of the equipment.

[0037] In the above embodiment, the present invention can achieve the following indicators: 1) During normal operation, the resistance of the benzol scrubber < 1000 Pa; 2) During normal operation, the content of crude benzene in the gas after the benzol scrubber can be as low as 0.3 - 2 g / m³; 3) Compared with the benzol scrubber using wooden grid or steel mesh packing, the economic benefit is significantly better; The present invention realizes the purpose of saving oil by reducing the formation of wash oil droplets, and improves the mass transfer effect through the combined packing and multiple redistributors, enabling the wash oil to more fully absorb the benzene hydrocarbons in the gas, achieving the purpose of increasing the recovery rate of crude benzene, and also extending the interval time of blockage of the benzol scrubber, and finally achieving the effect of reducing costs and increasing efficiency.

[0038] In the description of the present invention, a large number of specific details are set forth. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure the understanding of this description. In the description of this specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A fuel-saving and anti-blocking benzene washing tower, characterized in that: include: A tower body, wherein the top of the tower body is provided with a gas outlet, the upper side is provided with a lean oil inlet, the lower part is provided with a rich oil outlet, a liquid distributor is provided below the lean oil inlet, and a gas inlet is provided above the rich oil outlet; At least three packing layers are arranged between the liquid distributor and the gas inlet, and redistributors are arranged between adjacent packing layers; The fillers of at least three of the filler layers are combined fillers.

2. The fuel-saving anti-blocking benzene washing tower according to claim 1, characterized in that: The liquid distributor comprises: a support ring, the outer side of the support ring is welded to the tower body, and the bottom surface of the support ring is evenly distributed with a plurality of rib plates in an annular shape, and the support ring is provided with a plurality of groups of connection holes; A plurality of spray slots, wherein the plurality of spray slots correspond to the positions of the plurality of connection holes one by one, fixing holes are provided at both ends of the spray slots corresponding to the positions of the connection holes, and baffles are provided inside the fixing holes; At least two distribution slots, the distribution slots are arranged above the plurality of spray slots, and the distribution slots are provided with a plurality of through holes at positions corresponding to the spray slots; The lean oil inlet is a straight pipe passing through the tower body, and the end of the straight pipe is provided with elbows corresponding to the number and position of the distribution grooves, and the elbows extend into the distribution grooves respectively.

3. The fuel-saving anti-blocking benzene washing tower according to claim 2 is characterized in that: The side or bottom of the spray tank is provided with spray holes; The spray holes are point array holes or strip array holes; An overflow port is also provided on the upper edge of the spray tank.

4. The fuel-saving anti-blocking benzene washing tower according to claim 1, characterized in that: The redistributor is a detachable trough-disc type liquid distributor.

5. The fuel-saving anti-blocking benzene washing tower according to claim 1, characterized in that: The packing layer comprises a packing support and a packing, wherein the packing is arranged on the packing support; The filler support comprises a load-bearing structure and a grid, wherein the grid is divided into a plurality of grid plates, and a plurality of the grid plates are combined on the load-bearing structure.

6. The fuel-saving anti-blocking benzene washing tower according to claim 5, characterized in that: The load-bearing structure includes a support ring, a reinforcing rib plate, an ear frame and a support beam. A plurality of evenly distributed reinforcing rib plates are arranged below the support ring. The support ring and the reinforcing rib plates are welded to the inner wall of the tower body. A plurality of groups of ear frames are arranged in pairs and welded to the inner wall of the tower body, and a support beam is arranged between each pair of the ear frames.

7. The fuel-saving anti-blocking benzene washing tower according to claim 6, characterized in that: The material of the combined filler is light porcelain and stainless steel.

8. The fuel-saving anti-blocking benzene washing tower according to claim 1, characterized in that: A gas distribution device is provided at the position of the coal gas inlet, and the gas distribution device includes a gas primary distributor and a gas secondary distributor; The primary gas distributor comprises a top plate, both ends of which are welded to the inner wall of the tower body, and the end of the top plate close to the gas inlet is a wide end, and the end away from the gas inlet is a narrow end; A plurality of arc-shaped drainage plates are symmetrically distributed on both sides of the bottom surface of the top plate; The gas redistributor is arranged above the gas primary distributor.

9. The fuel-saving anti-blocking benzene washing tower according to claim 8, characterized in that: A bottom plate is provided below the arc-shaped guide plate, and the shape of the bottom plate is consistent with the shape of the top plate.

10. The fuel-saving anti-blocking benzene washing tower according to claim 1, characterized in that: A drain outlet is provided at the bottom of the tower body, and a vortex prevention plate is provided at the drain outlet.

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