Dry-type low-temperature oxidation device for desulfurized fly ash
By designing a dry low-temperature oxidation device, the desulfurization ash is subjected to grading, mixing and oxidation reactions, which solves the problems of unstable calcium sulfite and cumbersome operation, and achieves an efficient and simplified desulfurization ash oxidation process.
Patent Information
- Application Number
- CN202421358275.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-14
AI Technical Summary
In the prior art, the high content of calcium sulfite in the desulfurization ash is unstable, which limits its comprehensive utilization and leads to secondary pollution. The low-temperature oxidation method requires the desulfurization ash to be configured into a solution, and the operation process is cumbersome.
A dry low-temperature oxidation device for desulfurization ash is designed, including a crushing cylinder, a stirring cylinder and an oxidation cylinder. Through a hierarchical treatment structure of crushing, mixing and oxidation reaction, the desulfurization ash is carried out to avoid solution treatment.
It realizes efficient low-temperature oxidation of desulfurization ash, simplifies the operation process, improves the reaction efficiency, and avoids secondary pollution.
Smart Images
Figure CN222855427U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of desulfurization ash oxidation, in particular to a desulfurization ash dry low-temperature oxidation device. Background Art
[0002] Desulfurization ash is a by-product collected by the dust removal system after desulfurization in the semi-dry flue gas desulfurization process. Its components mainly include calcium sulfate, calcium sulfite, dust, etc. Due to the unstable chemical properties of calcium sulfite, a high content of calcium sulfite seriously limits the comprehensive utilization of desulfurization ash, resulting in secondary pollution. Therefore, the desulfurization ash needs to be treated. For the disposal of calcium sulfite in desulfurization ash, there are generally methods such as high-temperature decomposition, high-temperature oxidation, and low-temperature oxidation.
[0003] Normally, low-temperature oxidation is to prepare the desulfurization ash into a solution, add a strong oxidant to the desulfurization ash in the solution state, and make the calcium sulfite in the desulfurization ash react with the oxidant to achieve the low-temperature oxidation process of the desulfurization ash. However, this method requires the desulfurization ash to be prepared into a solution, and the solution after oxidation needs to be filtered and dried, and the operation process is cumbersome. Utility Model Content
[0004] The purpose of the utility model is to provide a desulfurized ash dry low-temperature oxidation device, which performs dry reaction on the desulfurized ash without configuring the desulfurized ash into a solution, so as to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a desulfurization ash dry low-temperature oxidation device, comprising an outer shell, which is a hollow cylindrical shape, a feed hopper is penetrated through the upper surface of the outer shell, a discharge pipe is penetrated through the lower surface of the outer shell, a valve is arranged inside the discharge pipe to control opening and closing, a graded processing structure is arranged inside the outer shell, and the graded processing structure is provided with a crushing drum, a stirring drum and a heating seat to separate the reaction processes of the desulfurization ash.
[0006] Preferably, the grading processing structure includes a crushing drum, which is a cylindrical cylinder that passes through from top to bottom, and is installed on the inner wall of the outer shell, and the upper surface of the crushing drum is aligned with the lower surface of the feed hopper, and a mixing drum is arranged below the crushing drum, and the mixing drum is an open cylindrical cylinder, and is installed on the inner wall of the outer shell, and a heating seat is arranged below the mixing drum, and the heating seat is installed on the bottom surface of the outer shell, and an oxidation cylinder is arranged on the upper surface of the heating seat, and the discharge pipe is arranged through the surfaces of the heating seat and the oxidation cylinder.
[0007] By adopting the above technical solution, the desulfurized ash can be gradually reacted using various structures.
[0008] Preferably, a crushing structure is provided inside the crushing cylinder, and the crushing structure crushes the desulfurization ash by means of a pressure roller to facilitate subsequent reactions.
[0009] By adopting the above technical solution, the input desulfurization ash can be broken up by using a crushing drum to prevent the desulfurization ash from agglomerating and affecting subsequent reactions.
[0010] Preferably, the crushing structure includes a motor, which is fixedly mounted on the lower surface of the shell, and the output end of the motor passes through the surface of the shell and is connected to a rotating drum, and the rotating drum simultaneously passes through the surfaces of the crushing drum, the stirring drum, the heating seat and the oxidation drum, and a screen plate is provided on the lower surface of the crushing drum, and a pressure roller is rotatably connected to the surface of the rotating drum at the crushing drum, and scraper rods are symmetrically provided on the surface of the rotating drum, and a feeding box is fixedly connected to the upper surface of the crushing drum, and the feeding box is aligned with the upper surface of the pressure roller.
[0011] By adopting the above technical solution, a motor is used to drive the drum to rotate, thereby driving the pressure roller to crush the desulfurization ash, and the desulfurization ash is broken up to facilitate subsequent reactions.
[0012] Preferably, a feeding structure is provided on the surface of the mixing drum, and a feeding box is provided on the feeding structure to add the oxidant into the interior of the mixing drum and fully mix the oxidant with the desulfurization ash.
[0013] By adopting the above technical solution, the oxidant can be fed into the device and mixed with the desulfurized ash using the feeding structure.
[0014] Preferably, the feeding structure includes a feeding box, which is an open structure and is connected to the outer surface of the rotating drum. A circular through hole is arranged in an annular shape on the lower surface of the feeding box, and the lower end of the feeding box extends into the interior of the mixing drum. A feeding hopper is fixedly installed on the outer surface of the outer shell, and a pipe is arranged at the lower end of the feeding hopper, which passes through the surface of the outer shell and is aligned with the upper end of the feeding box. A connecting pipe is arranged on the lower surface of the mixing drum and is aligned with the upper surface of the oxidation drum, and a valve is arranged inside the connecting pipe to control the opening and closing. Scrapers are symmetrically arranged on the outer surface of the rotating drum at the mixing drum.
[0015] By adopting the above technical solution, the oxidant is fed from the feeding hopper, and the oxidant enters the device along the feeding hopper to react with the desulfurized ash.
[0016] Preferably, scraper rods are symmetrically arranged on the outer surface of the rotating drum on the surface of the oxidation drum.
[0017] By adopting the above technical solution, the scraper rod can be used to stir the desulfurized ash during the oxidation reaction to ensure a thorough reaction.
[0018] Compared with the prior art, the utility model has the following beneficial effects: the desulfurization ash dry low-temperature oxidation device:
[0019] 1. The device has a crushing cylinder, a mixing cylinder and a reaction cylinder arranged in order from top to bottom in the shell, which respectively crush the desulfurized ash, mix the oxidant and perform the oxidation reaction process, so that the desulfurized ash undergoes a pre-reaction of crushing and mixing before the oxidation reaction, thereby increasing the efficiency of the desulfurized ash oxidation reaction;
[0020] 2. A sieve plate is arranged on the surface of the crushing cylinder of the device, and a rotating pressure roller and a scraper are arranged on the upper surface of the sieve plate. The pressure roller crushes and crushes the desulfurization ash to prevent the desulfurization ash from agglomerating and affecting the reaction, and the scraper can prevent the desulfurization ash from adhering to the surface of the sieve plate and causing blockage;
[0021] 3. In this device, a feeding box is rotatably arranged between the crushing drum and the mixing drum. The upper end of the feeding box is aligned with the feeding hopper. A through hole is arranged on the lower surface of the feeding box and is aligned with the mixing drum, so that the oxidant can evenly fall into the mixing drum through the rotating feeding box, and a rotating scraper is arranged in the mixing drum to fully mix the oxidant and desulfurization ash. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the external structure of the utility model;
[0023] Figure 2 This is a schematic diagram of the front section structure of the utility model;
[0024] Figure 3 This is a schematic diagram of the structure of the crushing cylinder of the utility model from a top view;
[0025] Figure 4 This is a schematic diagram of the front cross-section structure of the mixing drum of the utility model;
[0026] Figure 5 This is a schematic diagram of the front section structure of the oxidation cylinder of the utility model.
[0027] In the figure: 1. outer shell; 2. feed hopper; 3. discharge pipe; 4. crushing cylinder; 5. mixing cylinder; 6. heating seat; 7. oxidation cylinder; 8. motor; 9. rotating cylinder; 10. sieve plate; 11. pressure roller; 12. scraper rod; 13. scraper; 14. feeding box; 15. feeding hopper; 16. connecting pipe. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] See also Figure 1-5The utility model provides a technical solution: a desulfurization ash dry low-temperature oxidation device, including a shell 1, a feed hopper 2, a discharge pipe 3, a crushing cylinder 4, a mixing cylinder 5, a heating seat 6, an oxidation cylinder 7, a motor 8, a rotating cylinder 9, a sieve plate 10, a pressure roller 11, a scraper rod 12, a scraper 13, a feeding box 14, a feeding hopper 15, and a connecting pipe 16.
[0030] This device has the effect of pre-crushing, specifically:
[0031] The shell 1 is a hollow cylinder, the upper surface of the shell 1 is penetrated by a feed hopper 2, the lower surface of the shell 1 is penetrated by a discharge pipe 3, the discharge pipe 3 is provided with a valve inside to control the opening and closing, the shell 1 is provided with a grading treatment structure, the grading treatment structure is provided with a crushing cylinder 4, a mixing cylinder 5 and a heating seat 6 to separate the reaction processes of the desulfurized ash, the grading treatment structure includes a crushing cylinder 4, the crushing cylinder 4 is a cylinder that passes through from top to bottom, the crushing cylinder 4 is installed on the inner wall of the shell 1, and the upper surface of the crushing cylinder 4 is aligned with the lower surface of the feed hopper 2, the crushing cylinder 4 is provided with a mixing cylinder 5 below, the mixing cylinder 5 is an open cylinder, and the mixing cylinder 5 is installed on the inner wall of the shell 1, the mixing cylinder 5 is provided with a heating seat 6 below the mixing cylinder 5, and the heating seat 6 is installed on the bottom surface of the shell 1, An oxidation cylinder 7 is arranged on the upper surface of the heating seat 6, and a discharge pipe 3 is arranged through the surfaces of the heating seat 6 and the oxidation cylinder 7. A crushing structure is arranged inside the crushing cylinder 4, and the crushing structure crushes the desulfurized ash by means of a pressure roller 11, so as to facilitate subsequent reactions. The crushing structure comprises a motor 8, and the motor 8 is fixedly mounted on the lower surface of the housing 1. The output end of the motor 8 penetrates the surface of the housing 1 and is connected with a rotating cylinder 9, and the rotating cylinder 9 simultaneously penetrates the surfaces of the crushing cylinder 4, the stirring cylinder 5, the heating seat 6 and the oxidation cylinder 7. A sieve plate 10 is arranged on the lower surface of the crushing cylinder 4, and a pressure roller 11 is rotatably connected to the surface of the rotating cylinder 9 at the crushing cylinder 4. Scraping rods 12 are symmetrically arranged on the surface of the rotating cylinder 9, and a scraper 13 is fixedly connected to the upper surface of the crushing cylinder 4, and the scraper 13 is aligned with the upper surface of the pressure roller 11.
[0032] like Figure 1 , Figure 2 and Figure 3As shown, desulfurization ash is put into the outer shell 1 from the feed hopper 2, and the desulfurization ash falls onto the surface of the crushing drum 4 along the feed hopper 2. The motor 8 is started, and the motor 8 drives the rotating drum 9 to rotate. The rotation of the rotating drum 9 drives the pressure roller 11 and the scraper rod 12 to rotate inside the crushing drum 4. When the pressure roller 11 rotates, the pressure roller 11 crushes the desulfurization ash on the surface of the sieve plate 10, so that the desulfurization ash is dispersed and falls to the bottom through the sieve plate 10. At the same time, the movement of the scraper rod 12 exerts a force on the surface of the sieve plate 10 to prevent the desulfurization ash from adhering to the surface of the sieve plate 10 and causing the sieve plate 10 to be blocked. When the pressure roller 11 moves to contact with the scraper 13, the scraper 13 exerts a force on the surface of the pressure roller 11 to prevent the desulfurization ash from adhering to the surface of the pressure roller 11. After the crushing and crushing of the pressure roller 11 and the screening of the sieve plate 10, the agglomerated desulfurization ash is separated, so that the desulfurization ash can fully contact and react with the subsequent oxidant, thereby increasing the reaction efficiency.
[0033] This device has the effect of pre-mixing the oxidant, specifically:
[0034] A feeding structure is arranged on the surface of the mixing drum 5, and a feeding box 14 is arranged on the feeding structure to add an oxidant to the interior of the mixing drum 5 and fully mix the oxidant with the desulfurized ash. The feeding structure includes the feeding box 14, which is an open structure and is connected to the outer surface of the rotating drum 9. A circular through hole is arranged in an annular manner on the lower surface of the feeding box 14, and the lower end of the feeding box 14 extends into the interior of the mixing drum 5. A feeding hopper 15 is fixedly installed on the outer surface of the outer shell 1, and a pipeline is arranged at the lower end of the feeding hopper 15 to penetrate the surface of the outer shell 1 and be aligned with the upper end of the feeding box 14. A connecting pipe 16 is arranged on the lower surface of the mixing drum 5 and is aligned with the upper surface of the oxidation drum 7, and a valve is arranged inside the connecting pipe 16 to control opening and closing. Scraping rods 12 are symmetrically arranged on the outer surface of the rotating drum 9 at the mixing drum 5, and scraping rods 12 are symmetrically arranged on the outer surface of the rotating drum 9 on the surface of the oxidation drum 7.
[0035] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, after the desulfurized ash falls from the sieve plate 10 above, it falls into the mixing drum 5 or the upper surface of the feeding box 14. The feeding box 14 rotates synchronously with the rotating drum 9, so that the desulfurized ash falling on the surface of the feeding box 14 is discharged from the through holes on the surface of the feeding box 14 under the action of centrifugal force, and also falls into the mixing drum 5 below. At this time, the desulfurized ash is located in the mixing drum 5, and the oxidant is added from the feeding hopper 15. The oxidant falls along the feeding hopper 15 to the surface of the feeding box 14 and is discharged from the feeding hopper 15 under the action of centrifugal force. , falls into the mixing drum 5 from the through hole on the lower surface of the feeding box 14. At this time, the scraper rod 12 rotates inside the mixing drum 5 to fully mix the desulfurized ash and the oxidant. After mixing, the valve at the connecting pipe 16 is started to discharge the desulfurized ash and the oxidant into the oxidation drum 7 below, and the heating seat 6 is started to carry out a low-temperature oxidation reaction of the desulfurized ash in the oxidation drum 7. The scraper rod 12 stirs the desulfurized ash and the oxidant in the oxidation drum 7 to allow the reaction to proceed fully. After the reaction is completed, the valve at the discharge pipe 3 is started to discharge the desulfurized ash.
[0036] Working principle: When using the desulfurization ash dry low-temperature oxidation device, the desulfurization ash enters the device through the feed hopper 2 and falls on the surface of the crushing drum 4. After being acted upon by the pressure roller 11 and the screen plate 10 in the crushing drum 4, the crushed desulfurization ash falls into the mixing drum 5. The oxidant is added from the feeding hopper 15, and the oxidant falls along the feeding hopper 15 to the surface of the feeding box 14. The rotating feeding box 14 has a through hole on the lower surface that is aligned with the mixing drum 5, so that the oxidant falls evenly into the mixing drum 5, and is fully mixed with the desulfurization ash in the mixing drum 5. The mixed desulfurization ash and the oxidant fall into the oxidation drum 7 for low-temperature oxidation reaction. The crushing drum 4, the mixing drum 5 and the oxidation drum 7 are sequentially arranged from top to bottom in the outer shell 1, so that the desulfurization ash undergoes a pre-reaction of breakage and mixing before the oxidation reaction, thereby increasing the efficiency of the desulfurization ash oxidation reaction and increasing the overall practicality.
[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A desulfurized ash dry low-temperature oxidation device, comprising a housing (1), the housing (1) being in a hollow cylindrical shape, a feed hopper (2) being provided through the upper surface of the housing (1), a discharge pipe (3) being provided through the lower surface of the housing (1), a valve being provided inside the discharge pipe (3) to control opening and closing, and characterized in that: A graded processing structure is arranged inside the shell (1), and the graded processing structure is provided with a crushing drum (4), a stirring drum (5) and a heating seat (6) to separate the reaction processes of the desulfurized ash.
2. A desulfurization ash dry low-temperature oxidation device according to claim 1, characterized in that: The grading treatment structure comprises a crushing drum (4), which is a cylindrical drum penetrating from top to bottom, and is mounted on the inner wall of the outer shell (1), and the upper surface of the crushing drum (4) is aligned with the lower surface of the feed hopper (2), and a stirring drum (5) is arranged below the crushing drum (4), and the stirring drum (5) is an open cylindrical drum, and the stirring drum (5) is mounted on the inner wall of the outer shell (1), and a heating seat (6) is arranged below the stirring drum (5), and the heating seat (6) is mounted on the bottom surface of the outer shell (1), and an oxidation drum (7) is arranged on the upper surface of the heating seat (6), and the discharge pipe (3) is arranged to pass through the surface of the heating seat (6) and the oxidation drum (7).
3. A desulfurized ash dry low-temperature oxidation device according to claim 1, characterized in that: A crushing structure is arranged inside the crushing cylinder (4), and the crushing structure uses a pressure roller (11) to crush the desulfurized ash to facilitate subsequent reactions.
4. A desulfurized ash dry low-temperature oxidation device according to claim 3, characterized in that: The crushing structure comprises a motor (8), wherein the motor (8) is fixedly mounted on the lower surface of the outer shell (1), the output end of the motor (8) penetrates the surface of the outer shell (1) and is connected to a rotating drum (9), and the rotating drum (9) simultaneously penetrates the surfaces of the crushing drum (4), the stirring drum (5), the heating seat (6) and the oxidation drum (7), the lower surface of the crushing drum (4) is provided with a screen plate (10), the surface of the rotating drum (9) at the crushing drum (4) is rotatably connected to a pressure roller (11), the surface of the rotating drum (9) is symmetrically provided with scraper rods (12), the upper surface of the crushing drum (4) is fixedly connected to a scraper plate (13), and the scraper plate (13) is aligned with the upper surface of the pressure roller (11).
5. A desulfurization ash dry low-temperature oxidation device according to claim 1, characterized in that: A feeding structure is arranged on the surface of the mixing drum (5), and a feeding box (14) is arranged on the feeding structure to add an oxidant into the interior of the mixing drum (5) so as to fully mix the oxidant with the desulfurized ash.
6. A desulfurized ash dry low-temperature oxidation device according to claim 5, characterized in that: The feeding structure comprises a feeding box (14), which is an open structure and is connected to the outer surface of the rotating drum (9). The lower surface of the feeding box (14) is provided with a circular through hole in an annular shape, and the lower end of the feeding box (14) extends into the interior of the mixing drum (5). A feeding hopper (15) is fixedly mounted on the outer surface of the outer shell (1), and a pipeline is provided at the lower end of the feeding hopper (15) to penetrate the surface of the outer shell (1) and be aligned with the upper end of the feeding box (14). A connecting pipe (16) is provided on the lower surface of the mixing drum (5) and is aligned with the upper surface of the oxidation drum (7), and a valve is provided inside the connecting pipe (16) to control opening and closing. Scraping rods (12) are symmetrically provided on the outer surface of the rotating drum (9) at the mixing drum (5).
7. A desulfurized ash dry low-temperature oxidation device according to claim 2, characterized in that: Scraping rods (12) are symmetrically arranged on the outer surface of the rotating cylinder (9) on the surface of the oxidation cylinder (7).