Grinding and feeding system for dry desulfurization of coking plant

Abstract

The utility model discloses a grinding and feeding system for dry desulfurization of a coking plant, which comprises a baking soda grinding and feeding system, the baking soda grinding and feeding system is provided with a large stock bin for loading large-particle baking soda, the bottom of the large stock bin is communicated to a small stock bin, a stirring device is arranged in the small stock bin, and the small stock bin is communicated with the baking soda grinding and feeding system. The bottom of the small stock bin is communicated to a quantitative feeding device, and the quantitative feeding device is communicated to the grinding cabin; the grinding cabin is a hollow cavity, and a grinder is arranged at the bottom of the grinding cabin; the baking soda grinding and feeding systems are arranged side by side, each grinding cabin is independently communicated to a conveying pipeline through a conveying fan, and each conveying pipeline is communicated to a flue gas pipeline. The system solves the problem that the flue gas desulfurization effect of an existing coking plant is poor.

Description

[Technical field]

[0001] The utility model belongs to the technical field of desulfurization, and in particular relates to a grinding and feeding system for dry desulfurization in a coking plant. [Background technology]

[0002] The coke oven heating exhaust gas of the coking plant contains a large amount of sulfur dioxide. In order to overcome the phenomenon of excessive online sulfur dioxide indicators, flue gas desulfurization is required. Baking soda is usually used for desulfurization in the existing technology. However, the baking soda powder used is not fine enough in particles and is prone to sedimentation after passing into the flue gas pipeline, resulting in poor desulfurization effect. [Contents of the utility model]

[0003] The utility model aims to provide a grinding and feeding system for dry desulfurization in a coking plant, so as to solve the problem of poor flue gas desulfurization effect in the existing coking plant.

[0004] The utility model adopts the following technical scheme: a grinding and feeding system for dry desulfurization in a coking plant, comprising a baking soda grinding and feeding system, the baking soda grinding and feeding system having a large silo for loading large-particle baking soda, the bottom of the large silo is connected to a small silo, a stirring device is arranged inside the small silo, the bottom of the small silo is connected to a certain amount of feeding device, the quantitative feeding device is connected to a grinding chamber; the grinding chamber is a hollow cavity, the bottom of which is provided with a grinder;

[0005] The baking soda grinding and feeding system includes a plurality of grinding chambers arranged in parallel, each of which is independently connected to a conveying pipe through a conveying fan, and each conveying pipe is connected to a flue gas duct.

[0006] Furthermore, a discharge door that can be opened or closed is provided at the bottom of the large silo, and the discharge door is connected to a discharge motor for controlling whether to discharge or not.

[0007] Furthermore, the stirring device of the small silo is connected to a mixing motor.

[0008] The beneficial effects of the utility model are as follows: by arranging a large silo, a small silo and a grinding chamber and adopting a grading form to increase the particle fineness of baking soda powder, the desulfurization effect on flue gas is greatly improved; moreover, at least two baking soda grinding and feeding systems are connected in parallel on the flue gas duct, so that when the baking soda grinding and feeding system is shut down during maintenance and replacement, the problem of excessive online sulfur dioxide indicators will not be caused, thereby avoiding environmental accidents.

Brief Description of the Drawings

[0009] Figure 1 The utility model is a schematic diagram of system connection of a grinding and feeding system for dry desulfurization in a coking plant.

[0010] Among them, 1. large silo, 2. unloading motor, 3. small silo, 4. mixing motor, 5. quantitative feeding device, 6. grinding chamber, 7. grinder, 8. grading wheel, 9. conveying fan, 10. flue gas duct, 11. conveying duct. [Specific implementation method]

[0011] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0012] The utility model provides a grinding and feeding system for dry desulfurization in a coking plant, such as Figure 1 As shown, it includes a baking soda grinding and feeding system, the baking soda grinding system has a large silo 1 for loading large-particle baking soda, the bottom of the large silo 1 is connected to a small silo 3, the small silo 3 is provided with a stirring device, the bottom of the small silo 3 is connected to a certain amount of feeding device 5, the quantitative feeding device 5 is connected to a grinding chamber 6; the grinding chamber 6 is a hollow cavity, and a grinder is provided at the bottom thereof;

[0013] The baking soda grinding and feeding system includes a plurality of grinding chambers 6 arranged in parallel, each of which is independently connected to a conveying pipe 11 through a conveying fan 9 , and each conveying pipe 11 is connected to a flue gas duct 10 .

[0014] In some embodiments, a discharge motor 2 for controlling discharge is provided at the bottom of the large silo 1 .

[0015] In some embodiments, the stirring device of the small silo 3 is connected to a mixing motor 4 .

[0016] The working process of the grinding and feeding system of the utility model for dry desulfurization in a coking plant is as follows:

[0017] The coarser baking soda powder is loaded into the large silo 1, and the discharge door is opened by the discharge motor 2 to discharge the material into the small silo 3. The baking soda powder is stirred into fine particles through the stirring in the small silo 3. The fine particles of baking soda powder are introduced into the grinding chamber 6 through the quantitative feeding device 5 according to a certain dosage requirement. The baking soda powder is ground into very fine dust through the fine grinding in the grinding chamber 6. The dust material in the grinding chamber 6 is sucked into the flue gas duct 10 by the conveying fan 9 to complete the task of desulfurization in the flue gas.

[0018] At least two baking soda grinding and feeding systems can be connected in parallel on the flue gas duct 10, and each baking soda grinding and feeding system sucks dust materials into the conveying duct 11 through an independent conveying fan 9, and each conveying duct 11 is independently connected to the flue gas duct 10. When a baking soda grinding and feeding system needs to be repaired, only the baking soda grinding and feeding system needs to be shut down for maintenance, which does not affect the desulfurization process on the entire flue gas duct 10.

[0019] If more than two conveying pipes 11 are joined into one pipeline, and baking soda powder is provided to the coke oven heating exhaust gas in the flue gas pipe 10 through one conveying pipe 11 to reduce the sulfur dioxide in the flue gas, some inconveniences will occur, specifically: for the desulfurization equipment, regular switching and maintenance are required. During the switching process, the running grinder must be stopped first and then the standby grinder must be started. Therefore, the grinders in each baking soda grinding and feeding system cannot be operated at the same time. If the switching time is too long, it will easily cause the problem of excessive sulfur dioxide online indicators, causing environmental accidents. Therefore, the utility model independently connects each baking soda grinding and feeding system to the flue gas pipe, which can avoid the risks caused by shutdown and maintenance.

Claims

1. The grinding and feeding system for dry desulfurization in coking plants is characterized by: The invention comprises a baking soda grinding and feeding system, wherein the baking soda grinding and feeding system comprises a large silo (1) for loading large-particle baking soda, the bottom of the large silo (1) is connected to a small silo (3), a stirring device is arranged inside the small silo (3), the bottom of the small silo (3) is connected to a quantitative feeding device (5), and the quantitative feeding device (5) is connected to a grinding chamber (6); the grinding chamber (6) is a hollow cavity, and a grinder (7) is arranged at the bottom thereof; The baking soda grinding and feeding system comprises a plurality of grinding chambers (6) arranged in parallel, each of which is independently connected to a conveying pipe (11) via a conveying fan (9), and each conveying pipe (11) is connected to a flue gas pipe (10).

2. The grinding and feeding system for dry desulfurization in a coking plant according to claim 1, characterized in that: The bottom of the large silo (1) is provided with a discharge door that can be opened or closed, and the discharge door is connected to a discharge motor (2) for controlling discharge.

3. The grinding and feeding system for dry desulfurization in a coking plant according to claim 1 or 2, characterized in that: The stirring device of the small material bin (3) is connected to a mixing motor (4).

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