Screen for modular sulfuric acid converter and disassembly method thereof

Abstract

The invention discloses a screen for a modular sulfuric acid converter and a dismounting method of the screen. The screen comprises an annular base; the cylinder body is vertically arranged at the center of the annular base; one end of each partition plate is hinged to the outer side face of the barrel, and the other end of each partition plate makes contact with the inner ring face of the annular base; the strip-shaped opening groove is formed in the partition plate in the length direction of the partition plate; the upper restraining plates are formed on the two sides of the top of the strip-shaped opening groove and extend outwards; the lower restraining plates are formed on the two sides of the bottom of the strip-shaped opening groove and extend outwards; and the plurality of fan-shaped screens are matched with the upper constraint plates and the lower constraint plates on the corresponding partition plates and the inner ring surface of the annular base to form a separation surface. The modular screen has the beneficial effects that the screen is subjected to modular treatment, when a certain screen needs to be cleaned, only two adjacent partition plates need to be twisted, and rapid installation can be achieved after cleaning is completed.

Description

Technical Field

[0001] The invention relates to the field of sulfuric acid production, in particular to a screen for a modular sulfuric acid converter and a disassembly method thereof. Background Art

[0002] In the sulfuric acid production industry, sulfur dioxide gas in flue gas usually utilizes the catalytic effect of the catalyst in each bed layer inside the converter to increase the reaction rate. Each section of the converter is composed of a catalyst bed layer and a lower air chamber. When the sulfuric acid system is normal, the catalyst is affected by moisture, dust and acid mist in the flue gas, and is prone to pulverization. These pulverized catalyst dusts adhere to the bottom screen under the operation of moisture or acid mist, blocking the screen of this section, causing an increase in resistance, thereby affecting the normal operation of the sulfuric acid system.

[0003] The traditional converter screen is made up of several pieces of wire mesh, which is complicated to install and remove. In addition, the wire mesh overlaps near the joints, which can reduce the aperture and increase the resistance. Because there is a gap between the two overlapping wire meshes, some fine catalysts can easily enter the gap under the push of the airflow during operation, forming a sandwich, which aggravates the adhesion and blockage of the screen. Moreover, these catalysts that are stuck on the screen are difficult to clean, resulting in poor use effect.

[0004] For example, Chinese utility model patent publication number CN208427012U discloses a device for preventing catalyst displacement in a converter of an acid-making system, comprising a converter, a screen, and a refractory brick layer. The converter is filled with a vanadium catalyst, a screen is provided on the top of the vanadium catalyst, the size of the screen is consistent with the inner diameter of the converter, and the screen is located on the lower side of the flue gas inlet and the flue gas outlet of the converter, and the top bricks of the screen are paved with a refractory brick layer with gaps.

[0005] For another example, Chinese utility model patent publication number CN206384839U discloses a sulfur trioxide conversion device, including a tower body, a gas input pipe is provided on the top of the tower body, cooling air passes through an outer tube sheathed on the outside of the gas input pipe, multiple layers of screens are provided inside the tower body, two layers of porcelain ball layers are provided above the screens, a catalyst layer is provided between the two layers of porcelain ball layers, a gas disperser is provided below the lowest layer of screens, a gas outlet is provided at the bottom of one side of the tower body, the gas outlet is connected to a gas output pipe, and the other end of the gas output pipe is connected to a rotary separator.

[0006] The screens of the above patents are all made up of several pieces of steel wire mesh, and the installation and removal are still relatively cumbersome. After overlapping, the aperture becomes smaller and the resistance increases. During operation, some fine catalysts are easily pushed by the airflow to enter the gap to form a sandwich, which aggravates the adhesion and blockage of the screen. In addition, these catalysts that are adhered and blocked on the screen are difficult to clean. Summary of the invention

[0007] The technical problem to be solved by the present invention is that the existing screen for sulfuric acid converter has many disadvantages due to splicing, and for this purpose, a modular screen for sulfuric acid converter and a disassembly method thereof are provided.

[0008] The technical solution of the present invention is: a screen for a modular sulfuric acid converter, comprising: an annular base; a cylinder, the cylinder is vertically arranged at the center of the annular base; a plurality of partitions, one end of the plurality of partitions is hinged to the outer side surface of the cylinder, and the other end is in contact with the inner annular surface of the annular base; a strip opening groove, the strip opening groove is opened on the partition along the length direction of the partition; an upper constraint plate, the upper constraint plate is formed on both sides of the top of the strip opening groove and extends outward; a lower constraint plate, the lower constraint plate is formed on both sides of the bottom of the strip opening groove and extends outward; a plurality of fan-shaped screens, the plurality of fan-shaped screens cooperate with the upper constraint plates and the lower constraint plates on the corresponding partitions and the inner annular surface of the annular base to form a dividing surface, the thickness of the fan-shaped screen is adapted to the opening height of the corresponding strip opening groove, and the dividing surface divides the inside of the annular base into upper and lower parts; a support seat, the support seat is located at the bottom of the cylinder and is used to support the annular base and the cylinder.

[0009] In the above solution, the support seat comprises an annular support frame, and the bottom of the cylinder is fixedly connected to the inner ring of the annular support frame.

[0010] The main structure of the annular support frame in the above solution is a grid structure.

[0011] In the above solution, one end of the upper restraint plate and / or the lower restraint plate close to the partition is hinged to the partition through a torsion spring.

[0012] The method for disassembling a screen for a modular sulfuric acid converter comprises the following steps: when a certain sector-shaped screen needs to be cleaned, two adjacent partitions are twisted in opposite directions so that the sector-shaped screen between the two adjacent partitions is separated from the upper constraint plate and the lower constraint plate, and the sector-shaped screen can be taken out for cleaning.

[0013] The beneficial effect of the present invention is that the screen is processed in a modular manner. When a certain screen needs to be cleaned, only two adjacent partitions need to be twisted, and the screen can be quickly installed after cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of a screen for a modular sulfuric acid converter of the present invention; Figure 2 yes Figure 1 Schematic diagram of the middle annular base and cylinder; Figure 3 yes Figure 1 Schematic diagram of the middle partition; Figure 4 yes Figure 1 Schematic diagram of the middle support seat; In the figure, 1, annular base, 2, cylinder, 3, partition, 4, strip opening groove, 5, upper restraining plate, 6, lower restraining plate, 7, fan-shaped screen, 8, support seat. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0016] like Figure 1-4 As shown, the screen for modular sulfuric acid converter includes: an annular base 1; a cylinder 2, which is vertically arranged at the center of the annular base; a plurality of partitions 3, one end of which is hinged to the outer side surface of the cylinder, and the other end is in contact with the inner annular surface of the annular base; a strip opening groove 4, which is opened on the partition along the length direction of the partition; an upper constraint plate 5, which is formed on both sides of the top of the strip opening groove and extends outward; a lower constraint plate 6, which is formed on both sides of the bottom of the strip opening groove and extends outward; a plurality of fan-shaped screens 7, which cooperate with the upper and lower constraint plates on the corresponding partitions and the inner annular surface of the annular base to form a dividing surface, the thickness of the fan-shaped screen is adapted to the opening height of the corresponding strip opening groove, and the dividing surface divides the inside of the annular base into upper and lower parts; a support seat 8, which is located at the bottom of the cylinder and is used to support the annular base and the cylinder.

[0017] When used, the annular base is installed in the converter. The shape of the applicable converter is cylindrical to match the shape of the annular base. The edge of the support base is fixedly connected to the inner wall edge of the converter. The cylinder can be a hollow structure or a solid structure.

[0018] The support seat comprises an annular support frame, the bottom of the cylinder is fixedly connected to the inner ring of the annular support frame, and the main structure of the annular support frame is a grid structure, which mainly plays the role of supporting the annular base and the cylinder.

[0019] The upper constraint plate and / or lower constraint plate is hinged on the partition at one end close to the partition by a torsion spring. Specifically, the upper constraint plate and the lower constraint plate may be wing-shaped. When the fan-shaped screen is installed between the upper and lower constraint plates, the fan-shaped screen pushes the upper and lower constraint plates to rotate around the torsion spring and then open, allowing the fan-shaped screen to enter smoothly. The torsion spring then pushes the upper and lower constraint plates to rotate in the opposite direction to clamp the fan-shaped screen. In this way, the installation of adjacent screens is simplified. There is no need to piece together the wire mesh and there is no overlap. The joints of adjacent fan-shaped screens are all located in the upper and lower constraint plates, and fine catalysts will not be allowed to enter.

[0020] The method for disassembling a screen for a modular sulfuric acid converter includes the following steps: when a certain sector-shaped screen needs to be cleaned, two adjacent partitions are twisted to rotate in opposite directions, so that the target sector-shaped screen located between the two adjacent partitions is separated from the upper constraint plate and the lower constraint plate, and the adjacent partitions slide to the remaining adjacent sector-shaped screens through the strip opening grooves, and the target sector-shaped screen is untied, and the sector-shaped screen can be taken out for cleaning. After cleaning, the target sector-shaped screen can be installed by reverse operation.

Claims

1. Modular sulphuric acid converter screen, characterized by: include: annular base (1); A cylinder (2), wherein the cylinder is vertically arranged at the center of the annular base; a plurality of partitions (3), wherein one end of the plurality of partitions is hinged to the outer side surface of the cylinder, and the other end is in contact with the inner annular surface of the annular base; a strip opening groove (4), wherein the strip opening groove is opened on the partition along the length direction of the partition; an upper constraint plate (5), wherein the upper constraint plate is formed on both sides of the top of the strip opening groove and extends outward; a lower constraint plate (6), wherein the lower constraint plate is formed on both sides of the bottom of the strip opening groove and extends outward; a plurality of fan-shaped screens (7), wherein the plurality of fan-shaped screens cooperate with the upper constraint plates and the lower constraint plates on the corresponding partitions and the inner annular surface of the annular base to form a dividing surface, wherein the thickness of the fan-shaped screen is adapted to the opening height of the corresponding strip opening groove, and the dividing surface divides the inside of the annular base into an upper and a lower part; a support seat (8), wherein the support seat is located at the bottom of the cylinder and is used to support the annular base and the cylinder.

2. The modular sulfuric acid converter screen according to claim 1, characterized in that: The support seat comprises an annular support frame, and the bottom of the cylinder is fixedly connected to the inner ring of the annular support frame.

3. The modular sulfuric acid converter screen as claimed in claim 2, characterized in that: The main structure of the annular support frame is a grid structure.

4. The modular sulfuric acid converter screen according to claim 1, characterized in that: One end of the upper restraint plate and / or the lower restraint plate close to the partition is hinged on the partition through a torsion spring.

5. The method for disassembling a modular sulfuric acid converter screen according to any one of claims 1 to 4, characterized in that: The following steps are involved: When a certain sector screen needs to be cleaned, two adjacent partitions are twisted to rotate in opposite directions so that the sector screen located between the two adjacent partitions is separated from the upper constraint plate and the lower constraint plate, and the sector screen can be taken out for cleaning.

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