CN205187364U - Blast furnace gas prevents stifled type pneumatic conveyor - Google Patents

Abstract

The utility model discloses an anti-blocking type pneumatic conveying device for blast furnace gas, which comprises an ash storage bin, a nitrogen storage tank, an ash transportation pipeline and a dust removal mechanism. The output end of the ash unloader in the mechanism is connected to the ash conveying pipeline. The ash conveying pipeline between the dust removal mechanism and the nitrogen storage tank is provided with a pressure detector A, a pressure regulating valve group and an electric heater in sequence. The ash conveying pipeline between the electric heater and the electric heater is connected with the fluidized bed through the gas conveying pipeline, and a pressure detector B is installed on the ash conveying pipeline between the ash storage bin and the dust removal mechanism. The device adjusts the nitrogen temperature in the fluidization and ash conveying process and the automatic control and adjustment of the nitrogen pressure in the ash conveying pipeline, so that the dust is not easy to compact and the pipeline is not easy to block, thus ensuring the smooth progress of pneumatic conveying and greatly improving the efficiency of blast furnace gas. Processing efficiency.

Description

An anti-blocking type pneumatic conveying device for blast furnace gas

technical field

The utility model belongs to the technical field of metallurgical equipment, in particular to a blast furnace gas anti-blocking pneumatic conveying device.

Background technique

The dust filtered by the blast furnace gas dry bag filter is basically conveyed by positive pressure dense phase pneumatic conveying. The pneumatic conveying device used has good airtightness, long conveying distance, high conveying efficiency, simple operation and high degree of automation. , safety and environmental protection, and will not cause secondary dust and other advantages. But there are also some defects, such as: the ash conveying pipeline, especially the elbow, is easy to wear; after the gas temperature is lowered, the dust is easy to harden, and the pipeline is easy to block.

Therefore, it is necessary to provide a new technical solution to solve the above problems.

Utility model content

The technical problem to be solved by the utility model is to provide an anti-blocking type pneumatic conveying device for blast furnace gas, which can effectively avoid the blockage of the conveying pipeline.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

An anti-blocking type pneumatic conveying device for blast furnace gas, comprising an ash storage bin, a nitrogen storage tank, an ash transportation pipeline and a dust removal mechanism. Multiple blast furnace gas bag filter, each blast furnace gas bag filter has an ash hopper at the bottom, a fluidized bed on the outside of the ash hopper, and an ash unloader at the bottom, and the output end of the ash unloader is connected to Ash conveying pipeline, the ash conveying pipeline between the dust removal mechanism and the nitrogen storage tank is provided with a pressure detector A, a pressure regulating valve group and an electric heater in sequence, and the ash conveying pipeline between the pressure regulating valve group and the electric heater It is connected to the fluidized bed through the gas pipeline, and a pressure detector B is installed on the ash pipeline between the ash storage bin and the dust removal mechanism.

Further, an air-operated ball valve A is provided on the ash conveying pipeline between the pressure detector A and the pressure regulating valve group, and an air-operated ball valve B is arranged on the ash conveying pipeline between the pressure detector B and the dust removal mechanism.

Compared with the prior art, the utility model has the advantages that the device makes it difficult for the dust to harden and the pipeline to be difficult to clog by adjusting the nitrogen temperature during the fluidization and ash conveying process and the automatic control and adjustment of the nitrogen pressure in the ash conveying pipeline. Thereby, the smooth progress of pneumatic conveying is ensured, and the processing efficiency of blast furnace gas is greatly improved.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model.

Among them, 1. Ash storage bin, 2. Blast furnace gas bag filter, 21. Ash hopper, 3. Nitrogen storage tank, 4. Electric heater, 5. Pressure regulating valve group, 6. Air control ball valve A, 61, Air control ball valve B, 7, pressure detector A, 71, pressure detector B, 8, ash conveying pipeline, 9, gas conveying pipeline, 10, fluidized bed, 11, ash unloading machine.

detailed description:

As shown in Figure 1, a blast furnace gas anti-blocking pneumatic conveying device includes an ash storage bin 1, a nitrogen storage tank 3, an ash conveying pipeline 8 and a dust removal mechanism, and the two ends of the ash conveying pipeline 8 are connected to the ash storage bin 1 and the dust removal mechanism respectively. The nitrogen storage tank 3 is connected, and the dust removal mechanism includes a plurality of blast furnace gas bag filter 2 arranged side by side. The bottom of each blast furnace gas bag filter 2 is provided with an ash hopper 21, and the outside of the ash hopper 21 is provided with a fluidized bed 10. There is an ash unloading machine 11 at the bottom, the output end of the ash unloading machine 11 is connected to the ash conveying pipeline 8, and the ash conveying pipeline 8 between the dust removal mechanism and the nitrogen storage tank 3 is provided with a pressure detector A7, an air control The ball valve A6, the pressure regulating valve group 5 and the electric heater 4, the ash conveying pipeline 8 between the pressure regulating valve group 5 and the electric heater 4 is connected with the fluidized bed 10 through the gas conveying pipeline 9, and is located between the ash storage bin 1 and the electric heater 4. A pressure detector B71 is provided on the ash delivery pipeline 8 between the dust removal mechanisms, and an air control ball valve B61 is provided on the ash delivery pipeline 8 between the pressure detector B71 and the dust removal mechanism.

In the utility model, the electric heater 4 can increase the temperature of the nitrogen gas used for the fluidized bed 10 and the temperature of the nitrogen gas used for ash transportation when the temperature of the blast furnace gas is low, so that the dust is not easy to agglomerate during the fluidization and transportation process, ensuring the ash unloading and Smooth ash transportation, avoiding clogging of ash discharge and ash transportation; pressure detector A7 and pressure detector B71 can monitor the pressure changes in the ash transportation pipeline 8 in real time, and the pressure regulating valve group 5 automatically adjusts the nitrogen flow rate according to the feedback from the pressure detector. The opening degree is to ensure that the ash conveying pipeline 8 is not easy to block when the ash is unloaded unevenly; the fluidized bed 10 is opened during the dust conveying process, and the ash is conveyed while fluidizing. When the dust in a certain ash hopper 21 cannot be unloaded, Close the air control ball valve B61, adjust the pressure regulating valve group 5 to the maximum nitrogen, and use the high nitrogen to dredge the ash unloader 11 in reverse to further ensure smooth ash unloading and prevent blockage.

Claims (2)

1. A blast furnace gas anti-blocking type pneumatic conveying device is characterized in that: it comprises an ash storage bin, a nitrogen storage tank, an ash delivery pipeline and a dust removal mechanism, and the two ends of the ash delivery pipeline are respectively connected to the ash storage bin and the nitrogen storage tank connected, the dedusting mechanism includes a plurality of blast furnace gas bag type dust collectors arranged side by side, the bottom of each blast furnace gas bag type dust collector is provided with an ash hopper, and the outside of the ash hopper is provided with a fluidized bed, bottom An ash unloading machine is provided, the output end of the ash unloading machine is connected to the ash conveying pipeline, and the ash conveying pipeline between the dust removal mechanism and the nitrogen storage tank is provided with a pressure detector A, a pressure regulating valve group and an electric The heater, the ash conveying pipeline between the pressure regulating valve group and the electric heater is connected to the fluidized bed through the gas conveying pipeline, and the ash conveying pipeline between the ash storage bin and the dust removal mechanism is provided with a pressure detection Device B. 2. A blast furnace gas anti-blocking pneumatic conveying device according to claim 1, characterized in that: an air-controlled ball valve A is provided on the ash conveying pipeline between the pressure detector A and the pressure regulating valve group, An air control ball valve B is provided on the ash conveying pipeline between the pressure detector B and the dust removal mechanism.