Novel fixed bed device for dry desulfurization and denitrification

Abstract

The utility model belongs to the technical field of dry desulfurization and denitrification, and particularly relates to a novel fixed bed device for dry desulfurization and denitrification, which comprises a bed body, a gas inlet and a gas outlet are oppositely connected to the left and right of the top side of the bed body, and three through holes matched with feed port cover plates are formed in the left and right of the top of the bed body at intervals. The bottom face of the feeding port cover plate is connected with the top ends of first partition plates in an attached mode, a second partition plate is arranged between every two adjacent first partition plates, ventilation pipelines are formed among the first partition plates, the second partition plates and the inner wall of the bed body, and the bottom, vertically below the first partition plates, of the bed body is connected with a discharging cover plate. And a dehumidification adsorption material, a desulfurization adsorption material and a denitration adsorption material are respectively accommodated in the bed body on two sides of the two partition plates 1. Sulfur-containing flue gas can be in full contact with an adsorption material in the process of flowing along the ventilation pipeline, so that efficient desulfurization and denitrification treatment is realized by effectively utilizing the space in the bed body which occupies a small area; adsorption materials can be rapidly added and replaced through the feeding port cover plate and the discharging cover plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of dry desulfurization and denitration, and particularly relates to a novel fixed bed device for dry desulfurization and denitration. Background Art

[0002] Petroleum coke is a by-product obtained after crude oil is refined through coking. According to its sulfur content, it can be divided into high-sulfur coke (sulfur content > 3%), medium-sulfur coke (1.5% - 3.0%) and low-sulfur coke (sulfur content < 1.5%). The different sulfur contents of petroleum coke determine its different uses. High-sulfur coke is mostly used as fuel for cement plants and power plants. Low-sulfur coke can be used as raw materials for preparing pre-baked anode paste and pre-baked anodes for electrolytic aluminum, and can also be used to prepare graphite electrodes. When calcining petroleum coke, the flue gas often contains dust and sulfur dioxide. If sulfur dioxide is not removed, it will cause serious environmental pollution. To purify the flue gas, a flue gas desulfurization process needs to be used.

[0003] The dry desulfurization and denitration of the prior art has a high purification degree and can remove organic sulfur and nitrate. However, the sulfur and nitrate capacities are limited. In order to extend the operation cycle, a series and parallel process of multiple towers needs to be adopted. The desulfurization and denitration equipment is huge, with large investment and large floor area. When it fails, it is not convenient for operators to repair and maintain it. The operation technical requirements are high, the labor intensity is large, and the use safety of the desulfurization and denitration device cannot be guaranteed in time. The fixed bed adsorption devices involved in the market have a single structure, limited filling amount, and large floor area of the fixed bed body, and it is difficult to apply to some projects restricted by the site area. Summary of the Utility Model

[0004] Aiming at the above problems, the purpose of the utility model is to provide a novel fixed bed device for dry desulfurization and denitration, so as to solve the problems that the existing fixed bed adsorption device has a single structure, limited filling amount, large floor area of the fixed bed body, and it is difficult to apply to some projects restricted by the site area.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is: a novel fixed bed device for dry desulfurization and denitration, including a bed body. An air inlet and an air outlet are connected relatively left and right on the top side of the bed body. Three through holes adapted to install feeding port covers are spaced apart left and right on the top of the bed body. The bottom surface of the feeding port cover is in fit connection with the top end of a partition board one. A partition board two is arranged between two adjacent partition boards one. An air vent pipe is formed between the partition board one, the partition board two and the inner wall of the bed body. A discharging cover plate is connected to the bottom of the bed body vertically below the partition board one. The inner parts of the bed body on both sides of the two partition boards one respectively contain a dehumidifying adsorption material, a desulfurization adsorption material and a denitration adsorption material.

[0006] The beneficial effects of the present utility model are as follows: The sulfur-containing flue gas can flow along the ventilation duct formed between multiple partition plates I and partition plates II, so as to fully contact with the dehumidification adsorption material, desulfurization adsorption material and denitrification adsorption material, and then effectively utilize the space in the bed body with a relatively small floor area to achieve efficient desulfurization and denitrification treatment; The staff can quickly add and replace the adsorption material through the feeding port cover plate and the discharging cover plate.

[0007] In order to make the flue gas fully flow in the ventilation duct and then carry out desulfurization and denitrification treatment;

[0008] As a further improvement of the above technical solution: The vertical distance between the bottom end of the partition plate I and the bottom surface of the bed body is not less than the horizontal distance between the partition plate I and the partition plate II, and the vertical distance between the top end of the partition plate II and the top surface of the bed body is not less than the horizontal distance between the partition plate I and the partition plate II.

[0009] The beneficial effects of this improvement are as follows: The flue gas can flow smoothly in the ventilation duct separated into a snake shape by multiple partition plates I and partition plates II, and in the process of flowing, it can successively carry out efficient desulfurization and denitrification treatment with the dehumidification adsorption material, desulfurization adsorption material and denitrification adsorption material.

[0010] In order to effectively prevent the adsorption material from gushing out from the air inlet and the air outlet;

[0011] As a further improvement of the above technical solution: The top ends of the air inlet and the air outlet are not lower than the top end of the bed body.

[0012] The beneficial effects of this improvement are as follows: When the operator puts the adsorption material into the bed body, the height of the adsorption material can always be kept not higher than the top ends of the air inlet and the air outlet before the bed body is filled with the material.

[0013] In order to effectively control the use height of the adsorption material in the bed body;

[0014] As a further improvement of the above technical solution: A glass sight glass is installed on the side surface of the bed body, and the top end of the partition plate II is located horizontally behind the lens of the glass sight glass.

[0015] The beneficial effects of this improvement are as follows: When the operator adds the adsorption material into the bed body through the feeding port cover plate, the operator can directly observe through the glass sight glass whether the height of the material in the bed body is added to a suitable height, so as to effectively ensure the treatment effect of the adsorption material on the flue gas.

[0016] In order to effectively ensure the sealing performance at the connection between the feeding port cover plate and the partition plate I;

[0017] As a further improvement of the above technical solution: The feeding port cover plate is a stepped column structure with a thick upper end and a thin lower end, and the top surface of the partition plate I is flush with the inner top surface of the bed body.

[0018] The beneficial effects of this improvement are as follows: while the feeding port cover plate is installed at the top of the bed body to seal the feeding port of the bed body, it can be in flat contact with the top surface of the first partition board, avoiding the direct flow of flue gas through the upper end of the first partition board, thereby affecting the treatment effect of the device on flue gas.

[0019] To effectively ensure the sealing performance at the connection between the feeding port cover plate and the first partition board;

[0020] As a further improvement of the above technical solution: a plurality of through holes adapted to insert and install connection bolts are provided on the feeding port cover plate and the bed body.

[0021] The beneficial effects of this improvement are as follows: a plurality of connection bolts can firmly install the feeding port cover plate on the bed body, realizing effective sealing at the connections between the feeding port cover plate and the first partition board and between the feeding port cover plate and the bed body.

[0022] To quickly and effectively feed the dehumidification adsorption material, desulfurization adsorption material, and denitrification adsorption material into the bed body;

[0023] As a further improvement of the above technical solution: the straight line where the axis of the feeding port cover plate is located vertically passes through the center of the top surface of the first partition board, and the diameter of the feeding port cover plate is not greater than the horizontal distance between the two second partition boards.

[0024] The beneficial effects of this improvement are as follows: when the operator opens the feeding port cover plate to feed the adsorption material into the interior of the bed body, the adsorption material can slide on both sides of the first partition board and smoothly and orderly fall into the interior of the bed body.

[0025] The parts not involved in this device are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional structure diagram of the present utility model;

[0027] Figure 2 It is a schematic structural diagram of the present utility model Figure 1 ;

[0028] Figure 3 It is a schematic structural diagram of the present utility model Figure 2 ;

[0029] Figure 4 It is an enlarged view of A in the present utility model;

[0030] In the figure: 1, bed body; 2, air inlet; 3, air outlet; 4, feeding port cover plate; 41, connection bolt; 5, first partition board; 6, second partition board; 7, ventilation pipeline; 8, discharge cover plate; 9, glass sight glass; 10, dehumidification adsorption material; 11, desulfurization adsorption material; 12, denitrification adsorption material. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0032] Example 1:

[0033] As Figure 1As shown in FIG. -4, a new type of fixed bed device for dry desulfurization and denitrification includes a bed body 1. On the top side of the bed body 1, an air inlet 2 and an air outlet 3 are relatively connected on the left and right. Three through holes for fitting and installing a feeding port cover plate 4 are spaced apart on the top of the bed body 1 from left to right. The bottom surface of the feeding port cover plate 4 is in close contact with the top end of a partition plate 5. A partition plate 6 is arranged between two adjacent partition plates 5. An air vent pipe 7 is formed between the partition plate 5, the partition plate 6 and the inner wall of the bed body 1. A discharge cover plate 8 is connected to the bottom of the bed body 1 vertically below the partition plate 5. The inner parts of the bed body 1 on both sides of the two partition plates 5 are respectively filled with a dehumidifying adsorption material 10, a desulfurization adsorption material 11 and a denitrification adsorption material 12. The sulfur-containing flue gas can flow along the air vent pipe 7 formed between multiple partition plates 5 and partition plates 6, so as to fully contact with the dehumidifying adsorption material 10, the desulfurization adsorption material 11 and the denitrification adsorption material 12, and then effectively utilize the space in the bed body 1 with a relatively small floor area to achieve efficient desulfurization and denitrification treatment;The staff can quickly add and replace the adsorption materials through the feeding port cover plate 4 and the discharging cover plate 8. The vertical distance between the bottom end of the first partition plate 5 and the bottom surface of the bed body 1 is not less than the horizontal distance between the first partition plate 5 and the second partition plate 6. The vertical distance between the top end of the second partition plate 6 and the top surface of the bed body 1 is not less than the horizontal distance between the first partition plate 5 and the second partition plate 6. The flue gas can flow smoothly in the ventilation pipeline 7 separated into a snake shape by a plurality of first partition plates 5 and second partition plates 6, and can successively achieve efficient desulfurization and denitrification treatment with the dehumidification adsorption material 10, the desulfurization adsorption material 11 and the denitrification adsorption material 12 during the flowing process. The tops of the air inlet 2 and the air outlet 3 are not lower than the top of the bed body 1. When the operator inputs the adsorption material into the interior of the bed body 1, the height of the adsorption material can always be kept not higher than the tops of the air inlet 2 and the air outlet 3 before the bed body 1 is filled with the material. A glass sight glass 9 is installed on the side surface of the bed body 1. The top end of the second partition plate 6 is located at the horizontal rear side of the lens of the glass sight glass 9. When the operator adds the adsorption material into the interior of the bed body 1 through the feeding port cover plate 4, the operator can directly observe through the glass sight glass 9 whether the height of the material in the bed body 1 is added to a proper height, so as to effectively ensure the treatment effect of the adsorption material on the flue gas. The feeding port cover plate 4 is a stepped column structure with a thick upper end and a thin lower end. The top surface of the first partition plate 5 is flush with the inner top surface of the bed body 1. When the feeding port cover plate 4 is installed on the top of the bed body 1 to close the feeding port of the bed body 1, it can be in flat contact with the top surface of the first partition plate 5, avoiding the direct flow of the flue gas through the upper end of the first partition plate 5, thereby affecting the treatment effect of the device on the flue gas. A plurality of through holes for fitting and inserting connecting bolts 41 are formed in the feeding port cover plate 4 and the bed body 1. The plurality of connecting bolts 41 can stably install the feeding port cover plate 4 on the bed body 1, realizing effective sealing of the connection between the feeding port cover plate 4 and the first partition plate 5 and the connection between the feeding port cover plate 4 and the bed body 1. The straight line where the axis of the feeding port cover plate 4 is located vertically passes through the center of the top surface of the first partition plate 5. The diameter of the feeding port cover plate 4 is not greater than the horizontal distance between the two second partition plates 6. When the operator opens the feeding port cover plate 4 to put the adsorption material into the interior of the bed body 1, the adsorption material can slide along both sides of the first partition plate 5 and smoothly and orderly fall into the interior of the bed body 1.;

[0034] The working principle of this technical solution is as follows: The flue gas enters the interior of the bed body 1 through the air inlet 2 and flows in the ventilation pipeline 7 formed by the partition one 5 and the partition two 6. First, it passes through the dehumidification adsorption material 10 for dehumidification adsorption to ensure the desulfurization and denitrification effects of the subsequent desulfurization adsorption material 11 and denitrification adsorption material 12 on the flue gas. Subsequently, the dried flue gas passes through the desulfurization adsorption material 11 and the denitrification adsorption material 12 in sequence to achieve the desulfurization and denitrification treatment of the flue gas. Finally, it is discharged to the outside through the air outlet 3. When it is necessary to replace the dehumidification adsorption material 10, desulfurization adsorption material 11, and denitrification adsorption material 12, the operator can use tools to remove the discharge cover plate 8 below the corresponding material to conveniently discharge the material. When it is necessary to add new material to the interior of the bed body 1, the operator uses tools to remove the feeding port cover plate 4 above the corresponding material, and then puts the material into the interior of the bed body 1. The operator can observe the height of the material in the bed body 1 through the straight pipe of the glass sight glass 9.

[0035] It should be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] In this article, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation mode of the present invention. It should be pointed out that due to the limitation of literal expression, objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, refinements or changes can also be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A new type of fixed bed device for dry desulfurization and denitrification, characterized by: The invention comprises a bed body (1), wherein the top side of the bed body (1) is relatively connected to an air inlet (2) and an air outlet (3) on the left and right sides, and three through holes for mounting a feeding port cover plate (4) are spaced apart on the left and right sides of the top of the bed body (1). The bottom surface of the feeding port cover plate (4) fits the top of a partition plate (5) connected thereto, and a partition plate (6) is arranged between two adjacent partition plates (5). A ventilation duct (7) is formed between the partition plates (5), the partition plates (6) and the inner wall of the bed body (1). The bottom of the bed body (1) vertically below the partition plate (5) is connected to a discharge cover plate (8), and the interior of the bed body (1) on both sides of the two partition plates (5) is respectively filled with dehumidification adsorption material (10), desulfurization adsorption material (11) and denitrification adsorption material (12).

2. The novel fixed bed device for dry desulfurization and denitrification according to claim 1 is characterized in that: The vertical distance between the bottom end of the partition one (5) and the bottom surface of the bed body (1) is not less than the horizontal distance between the partition one (5) and the partition two (6), and the vertical distance between the top end of the partition two (6) and the top surface of the bed body (1) is not less than the horizontal distance between the partition one (5) and the partition two (6).

3. The novel fixed bed device for dry desulfurization and denitrification according to claim 1 is characterized in that: The top ends of the air inlet (2) and the air outlet (3) are not lower than the top end of the bed (1).

4. The novel fixed bed device for dry desulfurization and denitrification according to claim 1 is characterized in that: A glass sight mirror (9) is installed on the side of the bed body (1), and the top end of the second partition (6) is located at the horizontal rear side of the lens of the glass sight mirror (9).

5. The novel fixed bed device for dry desulfurization and denitrification according to claim 1 is characterized in that: The feed port cover plate (4) is a stepped column structure with a thick upper end and a thin lower end, and the top surface of the partition plate 1 (5) is flush with the inner top surface of the bed body (1).

6. The novel fixed bed device for dry desulfurization and denitrification according to claim 1 is characterized in that: The feeding port cover plate (4) and the bed body (1) are provided with a plurality of through holes adapted to be inserted into connecting bolts (41).

7. The novel fixed bed device for dry desulfurization and denitrification according to claim 1 is characterized in that: The straight line on which the axis of the feed port cover plate (4) is located vertically passes through the center of the top surface of the partition plate (5), and the diameter of the feed port cover plate (4) is not greater than the horizontal distance between the two partition plates (6).

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