Fluidized bed furnace hood for producing high-purity sulfuric acid

Abstract

The utility model provides a fluidized bed furnace hood for producing high-purity sulfuric acid, the fluidized bed furnace hood comprises a rod body, a hood body arranged on the rod body and a connecting assembly arranged between the rod body and the hood body, the hood body is detachably arranged on the rod body through the connecting assembly, the rod body comprises a first anti-corrosion layer, a supporting framework and a second anti-corrosion layer which are sequentially arranged from outside to inside, the first anti-corrosion layer is made of epoxy resin, the supporting framework is made of 45 # steel, the second anti-corrosion layer is made of polytetrafluoroethylene, by designing the material of the rod body, the anti-corrosion performance of the hood of the fluidized bed furnace can be effectively improved, in the production process of high-purity sulfuric acid, the rod body can be prevented from being corroded by SO3 gas of rolled and clamped acid foam, and the service life of the rod body is prolonged. The blast cap can effectively prolong the service life of the blast cap, ensures the heat exchange efficiency, is suitable for mass production of high-purity sulfuric acid, does not need frequent manual overhaul and maintenance, and has the advantages of low implementation cost, reduction of the production cost of high-purity sulfuric acid, simplicity and convenience in operation and convenience in popularization and implementation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of acid production equipment, and particularly relates to a high-purity sulfuric acid production boiling furnace wind cap. BACKGROUND

[0002] In the prior art, the boiling furnace is an important device in the high-purity sulfuric acid production process, and its main function is to efficiently absorb and convert SO3 through fluidized bed technology. In the actual production process, the boiling furnace wind cap is a key component in the boiling furnace, and its main role is to uniformly distribute air to keep the materials in the furnace in a good fluidized state, thereby improving the combustion efficiency and heat exchange efficiency. In the actual production process, the boiling furnace wind cap uniformly distributes air to the furnace through its porous structure, so that air and fuel particles are in full contact to form a fluidized bed. This fluidized state helps to uniformly burn the fuel, improves the combustion efficiency, and reduces local overheating and coking.

[0003] In the prior art, the material of the existing boiling furnace wind cap is usually high-carbon steel. In the high-purity sulfuric acid production process, SO3 gas is often entrapped with acid foam. As the service life increases, the inside and outside of the wind cap are severely corroded. In actual use, the heat exchange efficiency will be significantly reduced, which is not suitable for large-scale production of high-purity sulfuric acid. Frequent equipment maintenance significantly increases the production cost of high-purity sulfuric acid. Therefore, there is an urgent need for targeted improvement. CONTENT OF THE UTILITY MODEL

[0004] The application is proposed to solve the technical problem in the prior art that the material of the boiling furnace wind cap in the high-purity sulfuric acid production process is usually high-carbon steel, which has poor corrosion resistance. As the service life increases, the inside and outside of the boiling furnace wind cap are severely corroded, and frequent maintenance is required, which significantly reduces the heat exchange efficiency of the boiling furnace wind cap and increases the production cost of high-purity sulfuric acid. A boiling furnace wind cap for high-purity sulfuric acid production is provided.

[0005] The application adopts the following scheme. A boiling furnace wind cap for high-purity sulfuric acid production includes a rod body, a cap body provided on the rod body, and a connecting assembly provided between the rod body and the cap body. The cap body is detachably provided on the rod body through the connecting assembly. The rod body includes a first corrosion-resistant layer, a support framework, and a second corrosion-resistant layer arranged from outside to inside. The material of the first corrosion-resistant layer is selected from epoxy resin. The material of the support framework is selected from 45# steel. The material of the second corrosion-resistant layer is selected from polytetrafluoroethylene.

[0006] In some feasible embodiments, the boiling furnace wind cap for high-purity sulfuric acid production includes

[0007] The thickness of the first corrosion-resistant layer is defined as A.

[0008] The thickness of the support framework is defined as B.

[0009] define the thickness of the second anticorrosion layer as C;

[0010] the A, the B and the C satisfy the following relationship: 5.2≤B / A≤5.5, 7.5≤B / C≤8.8.

[0011] In some possible embodiments, the cap body is provided with a plurality of through holes spaced along the circumference thereof, the through holes being used for passing fluid.

[0012] In some possible embodiments, the high-purity sulfuric acid production with the boiler cap,

[0013] define the number of the through holes as N;

[0014] define the aperture size of the through holes as M;

[0015] the N and the M satisfy the following relationship: 2≤N≤4, 3.8mm≤M≤5.1mm.

[0016] In some possible embodiments, the connecting assembly comprises a first connecting lug provided on the end of the rod body, a second connecting lug provided on the cap body at a position corresponding to the first connecting lug, a fastening hole provided on the first connecting lug and the second connecting lug, and a fastener matched with the fastening hole, when the fastener is matched with the fastening hole, the cap body is detachably provided on the rod body.

[0017] In some possible embodiments, the rod body comprises a vertical flow-through part and a flow guide part provided on the end of the vertical flow-through part, the flow guide part being used for guiding the fluid in the vertical flow-through part into the cap body.

[0018] In some possible embodiments, an included angle is provided between the vertical flow-through part and the flow guide part, define the angle of the included angle as D, the D satisfies the following relationship: 45°≤D≤60°.

[0019] In some possible embodiments, further comprising a sealing gasket provided between the first connecting lug and the second connecting lug.

[0020] In some possible embodiments, further comprising a filter screen provided between the sealing gasket and the second connecting lug.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The application provides a high-purity sulfuric acid production boiling furnace hood, which comprises a rod body, a cap body arranged on the rod body, and a connecting assembly arranged between the rod body and the cap body, the cap body is detachably arranged on the rod body through the connecting assembly, the rod body comprises a first anticorrosion layer, a support framework and a second anticorrosion layer arranged in sequence from outside to inside, the material of the first anticorrosion layer is epoxy resin, the material of the support framework is 45# steel, and the material of the second anticorrosion layer is polytetrafluoroethylene. Through the design of the material of the rod body, the corrosion resistance of the boiling furnace hood can be effectively improved, in the high-purity sulfuric acid production process, the rod body can be prevented from being corroded by SO3 gas of acid foam, the service life of the hood can be effectively prolonged, the heat exchange efficiency of the hood can be ensured, the hood is suitable for mass production of high-purity sulfuric acid, manual frequent maintenance is not needed, the implementation cost is low, the production cost of high-purity sulfuric acid is reduced, the operation is simple, and the hood is easy to popularize and implement. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structure schematic view of the high-purity sulfuric acid production boiling furnace hood provided in the application;

[0024] Figure 2 It is a top view of the high-purity sulfuric acid production boiling furnace hood provided in the application;

[0025] Figure 3 It is a sectional view of A-A in the high-purity sulfuric acid production boiling furnace hood provided in the application; Figure 2

[0026] Figure 4 It is an exploded structure schematic view of the high-purity sulfuric acid production boiling furnace hood provided in the application;

[0027] Figure 5 It is a sectional structure schematic view of the rod body provided in the application. DETAILED DESCRIPTION

[0028] In combination with the content shown in the drawings, the technical scheme provided in the application is further described. Figures 1-5 A high-purity sulfuric acid production boiling furnace hood comprises a rod body 1, a cap body 2 arranged on the rod body 1, and a connecting assembly 3 arranged between the rod body 1 and the cap body 2, the cap body 2 is detachably arranged on the rod body 1 through the connecting assembly 3, the rod body 1 comprises a first anticorrosion layer 10, a support framework 11 and a second anticorrosion layer 12 arranged in sequence from outside to inside, the material of the first anticorrosion layer 10 is selected from epoxy resin, the material of the support framework 11 is selected from 45# steel, and the material of the second anticorrosion layer 12 is selected from polytetrafluoroethylene.

[0029] ​The application provides a high-purity sulfuric acid production boiling furnace hood, which comprises a rod body, a cap body arranged on the rod body and a connecting assembly arranged between the rod body and the cap body, the cap body is detachably arranged on the rod body through the connecting assembly, the rod body comprises a first anticorrosion layer, a support framework and a second anticorrosion layer arranged in sequence from outside to inside, the material of the first anticorrosion layer is epoxy resin, the material of the support framework is 45# steel, and the material of the second anticorrosion layer is polytetrafluoroethylene. Through the design of the material of the rod body, the corrosion resistance of the boiling furnace hood can be effectively improved, the rod body can be prevented from being corroded by SO3 gas of acid foam during high-purity sulfuric acid production, the service life of the hood can be effectively prolonged, the heat exchange efficiency of the hood can be ensured, the hood is suitable for mass production of high-purity sulfuric acid, manual frequent maintenance is not needed, the implementation cost is low, the production cost of high-purity sulfuric acid is reduced, the operation is simple, and the hood is easy to popularize and implement.

[0030] In the high-purity sulfuric acid production boiling furnace hood,

[0031] The thickness of the first anticorrosion layer 10 is defined as A;

[0032] The thickness of the support framework 11 is defined as B;

[0033] The thickness of the second anticorrosion layer 12 is defined as C;

[0034] The A, the B and the C satisfy the following relationship: 5.2≤B / A≤5.5, 7.5≤B / C≤8.8.

[0035] In actual implementation, B / A=5.2 and B / C=8.

[0036] In the implementation process of the embodiment, the cap body 2 is provided with a plurality of through holes 4 along the circumference thereof, and the through holes 4 are used for passing fluid.

[0037] In the high-purity sulfuric acid production boiling furnace hood,

[0038] The number of the through holes 4 is defined as N;

[0039] The aperture size of the through holes 4 is defined as M;

[0040] The N and the M satisfy the following relationship: 2≤N≤4, 3.8mm≤M≤5.1mm.

[0041] In actual implementation, N=3 and M=3.8mm.

[0042] In actual implementation, the cap body comprises a third anticorrosion layer, a main body and a fourth anticorrosion layer arranged from outside to inside in sequence, the third anticorrosion layer is made of epoxy resin, the main body is made of steel with a brand of 2GCr32, and the fourth anticorrosion layer is made of polytetrafluoroethylene.

[0043] In actual implementation, the through hole is arranged away from the wall body by rotation, so as to avoid corrosion of the acidic gas to the wall body.

[0044] In actual implementation, the connecting assembly 3 comprises a first connecting lug 30 arranged on the end of the rod body 1, a second connecting lug 31 arranged on the cap body 2 at a position corresponding to the first connecting lug 30, a fastening hole 32 arranged on the first connecting lug 30 and the second connecting lug 31, and a fastener matched with the fastening hole 32, and when the fastener is matched with the fastening hole 32, the cap body 2 can be detachably arranged on the rod body 1.

[0045] In actual implementation, the fastener is a fastening bolt, which can be matched with a fastening nut and a gasket to detachably arrange the cap body on the rod body.

[0046] In actual implementation, the rod body 1 comprises a vertical flow-through part 13 and a flow guide part 14 arranged on the end of the vertical flow-through part 13, and the flow guide part 14 is used for guiding the fluid in the vertical flow-through part 13 to the cap body 2.

[0047] In actual implementation, an included angle is arranged between the vertical flow-through part 13 and the flow guide part 14, and the angle of the included angle is defined as D, and the D satisfies the following relationship: 45°≤D≤60°.

[0048] In actual implementation, D=45°.

[0049] In actual implementation, the connecting assembly 3 comprises a first connecting lug 30 arranged on the end of the rod body 1, a second connecting lug 31 arranged on the cap body 2 at a position corresponding to the first connecting lug 30, a fastening hole 32 arranged on the first connecting lug 30 and the second connecting lug 31, and a fastener matched with the fastening hole 32, and when the fastener is matched with the fastening hole 32, the cap body 2 can be detachably arranged on the rod body 1.

[0050] In actual implementation, the material of the sealing gasket is selected from silica gel.

[0051] In actual implementation, the connecting assembly 3 comprises a first connecting lug 30 arranged on the end of the rod body 1, a second connecting lug 31 arranged on the cap body 2 at a position corresponding to the first connecting lug 30, a fastening hole 32 arranged on the first connecting lug 30 and the second connecting lug 31, and a fastener matched with the fastening hole 32, and when the fastener is matched with the fastening hole 32, the cap body 2 can be detachably arranged on the rod body 1.

[0052] In actual implementation, the material of the filter screen is selected from polytetrafluoroethylene.

[0053] This application provides a fluidized bed furnace vent cap for high-purity sulfuric acid production, comprising a rod, a cap body disposed on the rod, and a connecting assembly disposed between the rod and the cap body. The cap body is detachably mounted on the rod via the connecting assembly. The rod includes a first anti-corrosion layer, a support frame, and a second anti-corrosion layer arranged sequentially from the outside to the inside. The first anti-corrosion layer is made of epoxy resin, the support frame is made of 45# steel, and the second anti-corrosion layer is made of polytetrafluoroethylene. By designing the materials of the rod, the corrosion resistance of the fluidized bed furnace vent cap can be effectively improved. During the high-purity sulfuric acid production process, the rod body can be prevented from being corroded by SO3 gas entraining acid foam, effectively extending the service life of the vent cap and ensuring the heat exchange efficiency of the vent cap. It is suitable for large-scale production of high-purity sulfuric acid, requires no frequent manual inspection and maintenance, and has the advantages of low implementation cost, reduced high-purity sulfuric acid production cost, simple operation, and easy promotion and implementation.

[0054] The above are merely embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fluidized bed furnace vent cap for high-purity sulfuric acid production, characterized in that, The device includes a rod (1), a cap (2) disposed on the rod (1), and a connecting assembly (3) disposed between the rod (1) and the cap (2). The cap (2) is detachably disposed on the rod (1) via the connecting assembly (3). The rod (1) includes a first anti-corrosion layer (10), a support frame (11), and a second anti-corrosion layer (12) disposed sequentially from the outside to the inside. The first anti-corrosion layer (10) is made of epoxy resin, the support frame (11) is made of 45# steel, and the second anti-corrosion layer (12) is made of polytetrafluoroethylene.

2. The fluidized bed furnace vent cap for high-purity sulfuric acid production according to claim 1, characterized in that, The thickness of the first anti-corrosion layer (10) is defined as A; The thickness of the supporting frame (11) is defined as B; The thickness of the second anti-corrosion layer (12) is defined as C; The following relationships are satisfied by A, B and C: 5.2≤B / A≤5.5, 7.5≤B / C≤8.

8.

3. The fluidized bed furnace vent cap for high-purity sulfuric acid production according to claim 1, characterized in that, The cap body (2) is provided with a plurality of through holes (4) spaced apart along its circumference, and the through holes (4) are used to allow fluid to pass through.

4. The fluidized bed furnace vent cap for high-purity sulfuric acid production according to claim 3, characterized in that, The number of the through holes (4) is defined as N; The diameter of the through hole (4) is defined as M; The N and M satisfy the following relationship: 2≤N≤4, 3.8mm≤M≤5.1mm.

5. The fluidized bed furnace vent cap for high-purity sulfuric acid production according to claim 1, characterized in that, The connecting assembly (3) includes a first connecting lug (30) on the end of the rod (1), a second connecting lug (31) on the cap (2) at the corresponding position of the first connecting lug (30), a fastening hole (32) on both the first connecting lug (30) and the second connecting lug (31), and a fastener that is matched and passes through the fastening hole (32). When the fastener is matched and passes through the fastening hole (32), the cap (2) can be detachably mounted on the rod (1).

6. The fluidized bed furnace vent cap for high-purity sulfuric acid production according to claim 1, characterized in that, The rod (1) includes a vertical direct current passage (13) and a flow guide (14) provided at the end of the vertical direct current passage (13), the flow guide (14) being used to guide the fluid in the vertical direct current passage (13) to the cap (2).

7. The fluidized bed furnace vent cap for high-purity sulfuric acid production according to claim 6, characterized in that, An angle is provided between the vertical direct current passage (13) and the flow guide (14), and the angle of the included angle is defined as D. The angle of D satisfies the following relationship: 45°≤D≤60°.

8. The fluidized bed furnace vent cap for high-purity sulfuric acid production according to claim 5, characterized in that, It also includes a sealing gasket (5) disposed between the first connecting ear (30) and the second connecting ear (31).

9. The fluidized bed furnace vent cap for high-purity sulfuric acid production according to claim 8, characterized in that, It also includes a filter screen (6) disposed between the sealing gasket (5) and the second connecting ear (31).

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