A purification reactor

Abstract

The utility model discloses a kind of purification reactors, belong to purification technical field. Including by lower to upper sequentially connected import section, venturi acceleration section, connecting section, gradually expanding section and tower body section;The inner wall of the connecting place of tower body section and gradually expanding section and the connecting place of connecting section and venturi acceleration section is equipped with magnetic ceramic layer, magnetic ceramic layer is formed by magnetic ceramic sheet glue or magnetic suction on the inner wall of reactor. In this patent, magnetic ceramic sheet utilizes the permanent magnetism of itself, one side is firmly adsorbed on the inner wall of reactor, another side tightly adsorbs small ferromagnetic medium in flue gas, forms adsorption protective layer, when protective layer reaches certain thickness, magnetic ceramic sheet and nitre limestone powder in flue gas no longer produce direct impact and abrasion, to reduce the abrasion rate of magnetic ceramic sheet, the use cycle of magnetic ceramic sheet (it is also very wear-resistant) greatly extends. In addition, the installation and maintenance of magnetic ceramic layer are also very simple.

Description

Technical Field

[0001] This utility model belongs to the field of purification technology, and specifically relates to a purification reactor. Background Technology

[0002] Dry flue gas purification systems, especially circulating fluidized bed dry flue gas purification systems, can remove HCl, HF, SO2, SO3, dust and other pollutants from flue gas, achieving synergistic purification of multiple pollutants, and are being used more and more widely in the field of flue gas purification.

[0003] The structure of the dry flue gas purification system can be found in the description of application number CN200910112433.5, which discloses a multi-component pollutant purification and treatment device for waste incineration flue gas. This device includes a circulating fluidized bed desulfurization tower, an activated carbon bin, an absorbent bin, a material circulating air chute, a bin pump, a bag filter, a by-product bin, an atomizing water spray device, a support frame, and connecting pipes. The circulating fluidized bed desulfurization tower, from bottom to top, consists of a feed section, a Venturi tube, an outlet expansion section of the Venturi tube, and a top square section. The flue gas inlet of the feed section at the bottom of the circulating fluidized bed desulfurization tower is connected to an external inlet flue. The activated carbon bin's outlet... The activated carbon inlet is connected to the feed section at the bottom of the circulating fluidized bed desulfurization tower. The atomizing water spray device is located at the outlet expansion section of the venturi tube. The flue gas outlet at the top square section of the circulating fluidized bed desulfurization tower is connected to the flue gas inlet of the bag filter via a connecting flue. The outlet of the ash hopper at the bottom of the bag filter is connected to the inlet of the by-product hopper via a hopper pump. The outlet of the ash hopper is connected to the feed section of the circulating fluidized bed desulfurization tower via a material circulating air chute. The absorbent outlet of the absorbent hopper is connected to the feed section of the circulating fluidized bed desulfurization tower via a material circulating air chute. The outlet of the air inlet chamber at the top of the bag filter is connected to the clean flue gas exhaust pipe.

[0004] The core component of a circulating fluidized bed dry flue gas purification system is the purification reactor. A typical purification reactor includes, from bottom to top, an inlet section, a Venturi acceleration section, a connecting section, a diffuser section, a tower section, and an outlet section. The inlet section has a bent pipe structure. The upper and lower ends of the Venturi acceleration section are a contraction section and a diffusion section, both of which are conical structures. The connecting section connects the Venturi acceleration section and the diffuser section; the diffuser section has a conical structure that is wider at the top and narrower at the bottom. The tower section has a straight cylindrical structure with a relatively large diameter.

[0005] The purification reactor can be found in the description of patent application number CN201721813842.4, which discloses a flue gas purification reactor, comprising an inlet section, a Venturi acceleration section, a diffuser section, a straight pipe section, and an outlet section connected sequentially from bottom to top. The cross-section of the straight pipe section is an n-sided polygon, where n is a natural number not less than 5. The interfaces between the diffuser section and the outlet section and the straight pipe section are adapted to the shape of the straight pipe section.

[0006] Patent application CN201721815226.2 discloses an air inlet device for a flue gas purification reactor, including a curved section and a feeding section. The feeding section is equipped with a material chute, and the curved section is connected to the feeding section via a multi-stage Venturi tube. The multi-stage Venturi tube comprises multiple Venturi tube segments, each including a contraction section and a diffusion section. The diffusion section of one Venturi tube segment is connected to the contraction section of another Venturi tube segment. The contraction and diffusion sections of the Venturi tube segments are symmetrical and both are frustum-shaped.

[0007] During desulfurization, the inner wall of the reactor is constantly eroded by flue gas containing nitrate limestone powder blown out of the equipment, making it prone to wear and perforation. A major overhaul is typically required every three months or so, which is time-consuming, labor-intensive, and requires at least half a day of downtime. Utility Model Content

[0008] To address the aforementioned problems, this utility model provides a purification reactor. The applicant has maintained the purification reactor for an extended period (three years and four months) and found that wear is mainly concentrated in two areas: the connection between the tower section and the diffuser section, and the connection between the connecting section and the Venturi acceleration section. The applicant strengthens these two areas by adding magnetic ceramic layers to extend the maintenance cycle. The technical solution is as follows: This utility model provides a purification reactor, including an inlet section 1, a Venturi acceleration section 2, a connecting section 3, a diffuser section 4, and a tower section 5 connected sequentially from bottom to top; the inner walls of the connection between the tower section 5 and the diffuser section 4 and the connection between the connecting section 3 and the Venturi acceleration section 2 are provided with a magnetic ceramic layer 6, which is formed by magnetic ceramic sheets being glued or magnetically attracted to the inner wall of the reactor.

[0009] In this embodiment of the invention, the thickness of the magnetic ceramic layer 6 is 5-8 mm.

[0010] In this embodiment of the invention, the magnetic ceramic sheet is a barium ferrite magnetic ceramic sheet or a strontium ferrite magnetic ceramic sheet.

[0011] Preferably, the magnetic ceramic sheet in this embodiment of the present invention is strontium ferrite magnetic ceramic.

[0012] Preferably, in this embodiment of the invention, the magnetic ceramic layer 6 is formed by bonding magnetic ceramic sheets to the inner wall of the reactor with epoxy resin.

[0013] Specifically, in this embodiment of the invention, multiple magnetic ceramic sheets are attached to the inner wall of the reactor around the reactor axis to form ceramic sheet rings. One or more ceramic sheet rings are arranged adjacent to each other along the inner wall of the reactor to form a magnetic ceramic layer 6, and two adjacent ceramic sheet rings are staggered. For the magnetic ceramic layer 6 at the connection between the connecting section 3 and the Venturi acceleration section 2: one or two ceramic sheet rings are attached to the lower end of the connecting section 3; the inner wall of the contraction section at the upper part of the Venturi acceleration section 2 is covered with magnetic ceramic sheets.

[0014] More specifically, for the magnetic ceramic layer 6 at the connection between tower section 5 and the expanding section 4: the height of the magnetic ceramic layer 6 at the upper end of the expanding section 4 is 40-60cm, and the height of the magnetic ceramic layer 6 at the lower end of the tower section 5 is 40-60cm; for the magnetic ceramic layer 6 at the connection between connecting section 3 and the Venturi acceleration section 2: the height of the magnetic ceramic layer 6 at the lower end of the connecting section 3 is 8-12cm; and the height of the magnetic ceramic layer 6 at the upper end of the Venturi acceleration section 2 is 40-60cm.

[0015] The specifications of the magnetic ceramic sheet in this embodiment of the invention are: 80-120mm. 40-60mm 5-8mm.

[0016] The beneficial effects of the technical solution provided by this utility model embodiment are: In this patent, the magnetic ceramic sheet utilizes its permanent magnetism to firmly adhere to the inner wall of the reactor on one side, while tightly adsorbing the fine ferromagnetic media in the flue gas on the other, forming an adsorption protective layer. Once this protective layer reaches a certain thickness (1-3 mm), direct impact and abrasion between the magnetic ceramic sheet and the limestone powder in the flue gas cease, thus reducing the wear rate of the magnetic ceramic sheet and significantly extending its service life (as the magnetic ceramic sheet itself is also highly wear-resistant). This effectively protects the inner wall of the reactor from almost any wear. Its lifespan can reach 10-15 times that of a typical manganese steel liner. Furthermore, the installation (no welding required) and maintenance of the magnetic ceramic layer are very simple. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the purification reactor provided in an embodiment of this utility model.

[0018] In the diagram: 1. Inlet section, 2. Venturi acceleration section, 3. Connecting section, 4. Diverging section, 5. Tower section, 6. Magnetic ceramic layer. Detailed Implementation

[0019] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0020] Example 1 See Figure 1 Example 1 provides a purification reactor, comprising, from bottom to top, an inlet section 1, a Venturi acceleration section 2, a connecting section 3, a diffuser section 4, a tower section 5, and an outlet section. The Venturi acceleration section 2, connecting section 3, diffuser section 4, and tower section 5 are all vertically arranged. Magnetic ceramic layers 6 are provided on the inner walls of the connections between tower section 5 and diffuser section 4, and between connecting section 3 and Venturi acceleration section 2, to protect the easily worn parts of the reactor. The magnetic ceramic layer 6 is formed by adhesively bonding (and magnetically fixing) or magnetically attaching magnetic ceramic sheets (single layer) to the inner wall of the reactor.

[0021] In this embodiment of the invention, the thickness of the magnetic ceramic layer 6 is 5-8 mm; correspondingly, the thickness of the magnetic ceramic sheet is 5-8 mm. The magnetic ceramic sheet is a barium ferrite magnetic ceramic sheet or a strontium ferrite magnetic ceramic sheet, etc. Specifically, the magnetic ceramic sheet can be rectangular (beveled and / or trimmed as needed for installation), and its dimensions are 80-120 mm. 40-60mm 5-8mm. More specifically, magnetic ceramic sheets are available from Tiancheng Filter Industry's magnetic wear-resistant patches. These magnetic wear-resistant patches are made of barium ferrite (Ba). O.6 Fe2O3 series or strontium ferrite (Sr O.6 This type of functional ceramic is composed of Fe2O3 series with the addition of nickel, zinc, manganese metal oxides and some rare earth metals (cobalt, neodymium). It is prepared through processes such as mixing, pre-sintering, coarse crushing, fine grinding, drying or dehydration, mixing, molding, decarburization, sintering and magnetization. This ceramic has good physical properties (high pressure resistance, high flexural strength, good wear resistance) and chemical properties similar to ordinary ceramics (not easy to oxidize, resistant to acid and alkali corrosion). Moreover, the ceramic has good coercivity, magnetic energy product, high Curie temperature, and stable magnetism. It is also a new type of wear-resistant material with high efficiency in construction (high-strength permanent magnet).

[0022] Specifically, for the magnetic ceramic layer 6 at the connection between tower section 5 and the expanding section 4: the height of the magnetic ceramic layer 6 at the upper end of the expanding section 4 (length along the inclined plane) is 40-60cm, and the height of the magnetic ceramic layer 6 at the lower end of the tower section 5 (vertical length) is 40-60cm. For the magnetic ceramic layer 6 at the connection between connecting section 3 and the Venturi acceleration section 2: the height of the magnetic ceramic layer 6 at the lower end of connecting section 3 (vertical length) is 8-12cm; and the height of the magnetic ceramic layer 6 at the upper end of the Venturi acceleration section 2 (length along the inclined plane) is 40-60cm.

[0023] Example 2 Example 2 provides a purification reactor, which has a structure that is basically the same as that of Example 1, except that the magnetic ceramic sheet in this example is a strontium ferrite magnetic ceramic.

[0024] Example 3 Example 3 provides a purification reactor, which has a structure that is basically the same as that of Example 1, except that the magnetic ceramic layer 6 in this example is formed by magnetic ceramic sheets magnetically adsorbed onto the inner wall of the reactor.

[0025] Example 4 Example 4 provides a purification reactor, which has a structure basically the same as that of Example 1, except that the magnetic ceramic layer 6 in this example is formed by bonding magnetic ceramic sheets to the inner wall of the reactor with epoxy resin. When using epoxy resin adhesive, the inner wall must be cleaned thoroughly and kept flat. The epoxy resin mesh pattern (matching the shape and size of the magnetic ceramic sheets) is applied to the inner wall and then bonded.

[0026] Example 5 Example 5 provides a purification reactor, which is basically the same in structure as Example 1, except that: in this example, multiple magnetic ceramic sheets are attached to the inner wall of the reactor around the reactor axis to form ceramic rings. One or more ceramic rings are arranged adjacent to each other along the inner wall of the reactor to form a magnetic ceramic layer 6, and adjacent ceramic rings are staggered. For the magnetic ceramic layer 6 at the connection between the connecting section 3 and the Venturi acceleration section 2: one or two ceramic rings are attached to the lower end of the connecting section 3; the inner wall of the upper contraction section of the Venturi acceleration section 2 is covered with magnetic ceramic sheets.

[0027] Example 6 Example 6 provides a purification reactor, which is basically the same in structure as Example 1, except that the purification reactor in this example is a desulfurization reactor. The diameter of the tower section 5 is 3.4m, the diameter of the connecting section 3 is 1.2m, and the diameter of the Venturi acceleration section 2 is 1.7m. The magnetic ceramic sheet is strontium ferrite magnetic ceramic with a specification of 100mm. 50mm The magnetic ceramic layer 6, 6mm thick, is adhesively fixed to the inner wall of the reactor. For the magnetic ceramic layer 6 at the connection between column section 5 and the diffuser section 4: the height of the magnetic ceramic layer 6 at the upper end of the diffuser section 4 is 50cm, and the height of the magnetic ceramic layer 6 at the lower end of the column section 5 is 50cm. For the magnetic ceramic layer 6 at the connection between connecting section 3 and the Venturi acceleration section 2: the height of the magnetic ceramic layer 6 at the lower end of connecting section 3 is 10cm; the height of the magnetic ceramic layer 6 at the upper end of the Venturi acceleration section 2 is 50cm. After two years of use, no large-scale maintenance is required; only the fallen magnetic ceramic sheets need to be adhesively reattached to their corresponding positions.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A purification reactor, comprising, from bottom to top, an inlet section (1), a Venturi acceleration section (2), a connecting section (3), a diffuser section (4), and a tower section (5); characterized in that, The inner walls of the connection between the tower section (5) and the expansion section (4) and the connection between the connecting section (3) and the Venturi acceleration section (2) are provided with magnetic ceramic layers (6), which are formed by magnetic ceramic sheets being glued or magnetically attracted to the inner wall of the reactor.

2. The purification reactor according to claim 1, characterized in that, The thickness of the magnetic ceramic layer (6) is 5-8 mm.

3. The purification reactor according to claim 1, characterized in that, The magnetic ceramic sheet is a barium ferrite magnetic ceramic sheet or a strontium ferrite magnetic ceramic sheet.

4. The purification reactor according to claim 1, characterized in that, The magnetic ceramic layer (6) is formed by bonding magnetic ceramic sheets to the inner wall of the reactor with epoxy resin.

5. The purification reactor according to claim 1, characterized in that, Multiple magnetic ceramic sheets are attached to the inner wall of the reactor around the reactor axis to form a ceramic sheet ring. One or more ceramic sheet rings are arranged closely together along the inner wall of the reactor to form a magnetic ceramic layer (6). The two adjacent ceramic sheet rings are staggered. For the magnetic ceramic layer (6) at the connection between the connecting section (3) and the Venturi acceleration section (2): one or two ceramic sheet rings are attached to the lower end of the connecting section (3); the inner wall of the contraction section at the upper part of the Venturi acceleration section (2) is covered with magnetic ceramic sheets.

6. The purification reactor according to claim 5, characterized in that, For the magnetic ceramic layer (6) at the connection between the tower section (5) and the expanding section (4): the height of the magnetic ceramic layer (6) at the upper end of the expanding section (4) is 40-60cm, and the height of the magnetic ceramic layer (6) at the lower end of the tower section (5) is 40-60cm; for the magnetic ceramic layer (6) at the connection between the connecting section (3) and the Venturi acceleration section (2): the height of the magnetic ceramic layer (6) at the lower end of the connecting section (3) is 8-12cm, and the height of the magnetic ceramic layer (6) at the upper end of the Venturi acceleration section (2) is 40-60cm.

7. The purification reactor according to claim 1, characterized in that, The specifications of the magnetic ceramic sheet are: 80-120mm. 40-60mm 5-8mm.

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