Desulfurizing agent standby storage and injection device in SDS (sodium dodecyl sulfate) dry desulfurization system

Abstract

The utility model belongs to the technical field of desulfurizing agent standby storage, and particularly discloses a desulfurizing agent standby storage and injection device in an SDS (Sodium Dodecyl Sulfate) dry desulfurization system, which comprises a grinder, a flue, a storage bin and a Roots blower, the discharge end of the grinder is communicated with a feeding pipe, the feeding pipe is communicated with the flue, the feeding pipe is communicated with a material distributing pipe, the material distributing pipe is communicated with the storage bin, and the Roots blower is communicated with the storage bin. The storage bin is provided with a discharging pipe, the discharging pipe is communicated with the feeding pipe, a first valve and a second valve are arranged on the distributing pipe and the discharging pipe, an air supply pipe is arranged on the feeding pipe, the Roots blower is communicated with the air supply pipe, and a first gate valve and a second gate valve are arranged on the air supply pipe and the feeding pipe. The problems that when a grinding machine stops overhauling for one day, SO2 purification treatment cannot be completed, and related production equipment stops running are solved. According to the utility model, the ground desulfurizer is stored in the storage bin, and the standby desulfurizer can be directly called when the grinding machine is overhauled, so that the continuous desulfurization operation is ensured, and the production interruption caused by the shutdown of the grinding machine is avoided.

Description

Technical Field

[0001] This utility model relates to the field of desulfurizer backup storage technology, specifically to a desulfurizer backup storage injection device in an SDS dry desulfurization system. Background Technology

[0002] The coking industry is a high-energy-consuming and heavily polluting industry. The waste gas generated during the coke oven production process contains SO2 and NO. X Coke oven flue gas contains air pollutants such as particulate matter, thus requiring desulfurization and denitrification devices to ensure compliance with emission standards. The main sources of SO2 in coke oven flue gas are twofold: First, coke ovens use coke oven gas as fuel for heating. While coke oven gas contains some organic and inorganic sulfur, it undergoes desulfurization and purification processes, resulting in a relatively low actual sulfur content and a relatively small contribution to SO2 production. Second, because coke ovens are constructed with refractory bricks, their airtightness decreases with age, leading to leakage of raw coal gas generated during the dry distillation of coking coal into the combustion system, which is a major source of SO2 in coke oven flue gas. The main technologies for desulfurization of coke oven flue gas include wet desulfurization, semi-dry desulfurization, and dry desulfurization. However, because the SO2 content in coke oven flue gas is relatively low compared to sintering and power boiler flue gas (approximately 100-300 mg / m³), the overall SO2 content is significantly lower. 3 Therefore, the use of SDS dry desulfurization technology is currently the common choice in the coking industry.

[0003] When desulfurization is carried out by SDS dry desulfurization, the desulfurizing agent (particle size of 20-25μm) ground from the mill is sent into the flue. It is thermally activated in the flue, and its specific surface area increases rapidly. It comes into full contact with the flue gas and undergoes physical and chemical reactions, so that acidic substances such as SO2 in the flue gas are absorbed and purified.

[0004] However, when the grinding mill needs to be shut down for maintenance for a day, the desulfurizing agent cannot be ground to the appropriate particle size and fed into the flue, thus failing to complete the SO2 purification treatment in the coke oven flue gas, causing the relevant production equipment to stop operating. Utility Model Content

[0005] The purpose of this invention is to provide a backup storage and injection device for desulfurizing agent in an SDS dry desulfurization system, so as to solve the problem that SO2 purification cannot be completed when the grinding mill needs to be stopped for maintenance for a day, resulting in the shutdown of related production equipment.

[0006] To achieve the above objectives, the basic solution provided by this utility model is as follows: a desulfurizing agent backup storage and injection device in an SDS dry desulfurization system, comprising a grinding mill, a flue, a storage silo, and a Roots blower. The discharge end of the grinding mill is connected to a feeding pipe, one end of which is connected to the flue. A distribution pipe is connected to the feeding pipe, one end of which is connected to the storage silo. A discharge pipe is provided at the bottom of the storage silo, and the discharge pipe is connected to the feeding pipe. A valve one and a valve two are respectively provided on the distribution pipe and the discharge pipe. An air supply pipe is provided on the feeding pipe between the distribution pipe and the grinding mill. The Roots blower is connected to the air supply pipe. A gate valve one and a gate valve two are respectively provided on the air supply pipe and the feeding pipe.

[0007] The working principle of this utility model is as follows: In an SDS dry desulfurization system, a backup storage and injection device for desulfurizing agent is provided. When the grinding mill is running normally, valve one and gate valve two are opened first, and then valve one and gate valve one are closed. Then, the desulfurizing agent ground from the grinding mill enters the feeding pipe. Part of the desulfurizing agent in the feeding pipe enters the distribution pipe, and the other part of the desulfurizing agent enters the flue along the feeding pipe. In the flue, it is thermally activated, and the specific surface area increases rapidly, making full contact with the flue gas and undergoing physical and chemical reactions, so that acidic substances such as SO2 in the flue gas are absorbed and purified. The desulfurizing agent entering the distribution pipe enters the storage silo for storage. When the staff judges by experience that the material level in the storage silo has reached the preset height of the level gauge, valve one is manually closed, and then the desulfurizing agent continues to enter the flue along the feeding pipe to carry out the desulfurization reaction.

[0008] When the grinding mill malfunctions and needs to be stopped for maintenance, first open valve one and valve two, close gate valve two, and then start the Roots blower. The desulfurizing agent in the storage silo enters the feeding pipe. The Roots blower generates airflow in the feeding pipe, causing the desulfurizing agent to enter the flue along the feeding pipe. In the flue, it is thermally activated, its specific surface area increases rapidly, and it comes into full contact with the flue gas, undergoing physical and chemical reactions, so that acidic substances such as SO2 in the flue gas are absorbed and purified.

[0009] The beneficial effects of this utility model are as follows: by storing the ground desulfurizing agent in the storage silo, the spare desulfurizing agent can be directly called up when the grinding machine is under maintenance, ensuring continuous desulfurization operation and avoiding production interruption caused by the grinding machine shutdown; the valves on the distribution pipe and the discharge pipe control the flow of desulfurizing agent, realize the rapid switching between normal operation and spare supply, the operation is simple, and the flexibility and reliability of the system are improved.

[0010] Option 2, which is a preferred option of the basic option, is that the discharge pipe is equipped with a screw unloader; the screw unloader can uniformly control the discharge speed of the desulfurizing agent, prevent blockage, and improve the reliability of the backup system.

[0011] Option 3, which is a preferred option of the basic option, is that the discharge pipe is equipped with an expansion joint; the expansion joint absorbs the stress of pipe contraction and expansion, and avoids pipe deformation or rupture.

[0012] Option 4, which is a preferred option of the basic option, has an injector at one end of the feeding pipe located inside the flue; the injector evenly sprays the desulfurizing agent into the flue, enhancing the contact efficiency with the flue gas and improving the desulfurization effect.

[0013] Option 5, which is a preferred option of the basic option, is that the top of the storage silo is equipped with a spare feed inlet and a dust collector; the spare feed inlet facilitates the replenishment of desulfurizing agent, and the dust collector reduces the overflow of dust from the storage silo, ensuring a clean working environment.

[0014] Option 6, which is a preferred option of the basic option, is equipped with a pressure gauge on the feeding pipe; the pressure of the feeding pipe is monitored in real time, which facilitates the adjustment of the fan power or valve opening and ensures the stable operation of the conveying system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a backup storage and injection device for desulfurizing agent in an SDS dry desulfurization system according to this utility model. Detailed Implementation

[0016] The present invention will be further described in detail below through specific embodiments:

[0017] The reference numerals in the accompanying drawings of the instruction manual include: 1. Grinding mill; 2. Flue; 3. Storage silo; 4. Roots blower; 5. Feed pipe; 6. Distribution pipe; 7. Discharge pipe; 8. Valve 1; 9. Valve 2; 10. Air supply pipe; 11. Gate valve 1; 12. Gate valve 2; 13. Screw unloader; 14. Expansion joint; 15. Injector; 16. Dust collector; 17. Pressure gauge.

[0018] like Figure 1The following is an illustration of a desulfurizing agent backup storage and injection device in an SDS dry desulfurization system: a grinding mill 1, a flue 2, a storage silo 3, and a Roots blower 4. The discharge end of the grinding mill 1 is connected to a feeding pipe 5, one end of which is connected to the flue 2. An injector 15 is installed at the end of the feeding pipe 5 located within the flue 2. The injector 15 is existing technology and will not be explained further. A distribution pipe 6 is connected to the feeding pipe 5, one end of which is connected to the storage silo 3. Dust collectors 16 are installed at the top of the storage silo 3, and a discharge pipe 7 is installed at the bottom of the storage silo 3, connected to the feeding pipe 5. Valves 8 and 9 are respectively installed on the distribution pipe 6 and the discharge pipe 7. Valves 8 and 9 are gate valves. A screw conveyor 13 and an expansion joint 14 are installed on the discharge pipe 7. An air supply pipe 10 is installed on the feeding pipe 5 between the distribution pipe 6 and the grinding mill 1. The Roots blower 4 is connected to the air supply pipe 10. The air supply pipe 10 and the feeding pipe 5 are respectively equipped with gate valve 11 and gate valve 2 12. The feeding pipe 5 is equipped with a pressure gauge 17. The top of the storage silo 3 is equipped with a level gauge to prevent the desulfurizer in the storage silo 3 from being over-stored, thus avoiding overflow of the storage silo 3. The storage silo 3 is equipped with ear seats on both sides. The storage silo 3 is installed on the second floor and is stably supported on the second floor by the ear seats. During normal production, to prevent the desulfurizer in the intermediate silo from clumping during long-term storage, it will be emptied and replaced every half month. The top of the storage silo 3 is equipped with a spare feed port. Finished desulfurizer with the required fineness is added through the spare feed port at the top. This can prevent the material from being cut off due to insufficient storage in the storage silo 3 when the grinding machine is out of service for a long time. The storage silo 3 is made of stainless steel to prevent the desulfurizer from sticking to the inner wall of the storage silo 3.

[0019] The implementation method of this embodiment is as follows: When the grinding mill 1 is running normally, firstly open valve 8 and gate valve 12, and close valve 9 and gate valve 11. Then, the desulfurizing agent ground from the grinding mill 1 enters the feeding pipe 5. Part of the desulfurizing agent in the feeding pipe 5 enters the distribution pipe 6, and the other part of the desulfurizing agent enters the flue 2 evenly through the injector 15 along the feeding pipe 5. In the flue 2, it is thermally activated, the specific surface area increases rapidly, and it comes into full contact with the flue gas, undergoing physical and chemical reactions, so that acidic substances such as SO2 in the flue gas are absorbed and purified. The desulfurizing agent entering the distribution pipe 6 enters the storage silo 3 for storage. When the material level in the storage silo 3 reaches the preset height of the level gauge, the level gauge sounds an alarm, and the operator manually closes valve 8. The desulfurizing agent continues to enter the flue 2 along the feeding pipe 5 to carry out the desulfurization reaction.

[0020] When grinding mill 1 malfunctions and needs to be stopped for maintenance, first open valves 9 and 11, and close gate valve 12. Then, start the Roots blower 4 and the screw conveyor 13. The desulfurizing agent in storage silo 3 enters the feeding pipe 5 through the screw conveyor 13. The Roots blower 4 generates airflow in the feeding pipe 5, causing the desulfurizing agent to flow evenly into the flue gas 2 through the injector 15. In the flue gas 2, the agent is thermally activated, its specific surface area increases rapidly, and it comes into full contact with the flue gas, undergoing physical and chemical reactions that absorb and purify acidic substances such as SO2 in the flue gas. The storage silo 3 has enough capacity to meet the desulfurization needs of flue gas 2 for one day. If grinding mill 1 is not fully maintained within one day, finished desulfurizing agent with the required fineness can be added through the spare feed inlet at the top of storage silo 3 until grinding mill 1 is fully maintained.

[0021] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A backup storage and injection device for desulfurizing agent in an SDS dry desulfurization system, characterized in that, The equipment includes a grinding mill (1), a flue (2), a storage silo (3), and a Roots blower (4). The discharge end of the grinding mill (1) is connected to a feeding pipe (5). One end of the feeding pipe (5) is connected to the flue (2). A distribution pipe (6) is connected to the feeding pipe (5). One end of the distribution pipe (6) is connected to the storage silo (3). The bottom of the storage silo (3) is provided with a discharge pipe (7). The discharge pipe (7) is connected to the feeding pipe (5). A valve (8) and a valve (9) are respectively provided on the distribution pipe (6) and the discharge pipe (7). An air supply pipe (10) is provided on the feeding pipe (5) between the distribution pipe (6) and the grinding mill (1). The Roots blower (4) is connected to the air supply pipe (10). A gate valve (11) and a gate valve (12) are respectively provided on the air supply pipe (10) and the feeding pipe (5).

2. The desulfurizing agent backup storage and injection device in an SDS dry desulfurization system according to claim 1, characterized in that, The discharge pipe (7) is equipped with a screw unloader (13).

3. The desulfurizing agent backup storage and injection device in an SDS dry desulfurization system according to claim 1, characterized in that, An expansion joint (14) is provided on the discharge pipe (7).

4. The desulfurizing agent backup storage and injection device in an SDS dry desulfurization system according to claim 1, characterized in that, The feed pipe (5) is equipped with an injector (15) at one end inside the flue (2).

5. The desulfurizing agent backup storage and injection device in an SDS dry desulfurization system according to claim 1, characterized in that, The top of the storage silo (3) is equipped with a spare feed inlet and a dust collector (16).

6. The desulfurizing agent backup storage and injection device in an SDS dry desulfurization system according to claim 1, characterized in that, A pressure gauge (17) is provided on the feed pipe (5).

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