阅读说明：本技术 高炉炉顶料罐煤气全回收净化系统及方法 (Full recovery and purification system and method for blast furnace top charging bucket gas ) 是由 王琼 丛丽丽 王兴海 段梦凡 王天宇 于 2020-08-28 设计创作，主要内容包括：本发明提供一种高炉炉顶料罐煤气全回收净化系统及方法,包括：煤气回收阀组、管道、布袋除尘器、除尘器入口阀门组,除尘器出口阀门组、气动叶轮旋转增压装置、助推装置、净煤气管网；煤气回收阀组通过管道与布袋除尘器入口阀门连接,布袋除尘器入口阀门组和出口阀门组通过布袋除尘器进出口短节与布袋除尘器连通,布袋除尘器出口阀门组出口与气动叶轮旋转助推装置入口连通,气动叶轮旋转助推装置出口与助推装置连通,助推装置出口与净煤气低压管网连通；本发明的优点是：利用气动叶轮旋转增压装置强制将料罐内的煤气压力在规定的时间内降至料罐工作压力,并且将煤气进行净化回收,克服了布袋除尘器和管道的阻力,顺利的将煤气送至净煤气低压管网。(The invention provides a system and a method for fully recovering and purifying coal gas of a blast furnace top charging bucket, which comprises the following steps: the system comprises a gas recovery valve group, a pipeline, a bag-type dust collector, a dust collector inlet valve group, a dust collector outlet valve group, a pneumatic impeller rotating supercharging device, a boosting device and a clean gas pipe network; the gas recovery valve group is connected with an inlet valve of the bag-type dust collector through a pipeline, an inlet valve group and an outlet valve group of the bag-type dust collector are communicated with the bag-type dust collector through inlet and outlet short sections of the bag-type dust collector, an outlet of the outlet valve group of the bag-type dust collector is communicated with an inlet of the pneumatic impeller rotation boosting device, an outlet of the pneumatic impeller rotation boosting device is communicated with the boosting device, and an outlet of the boosting device is communicated with a clean gas low-pressure pipe network; the invention has the advantages that: the pneumatic impeller rotating supercharging device is utilized to force the gas pressure in the charging bucket to be reduced to the working pressure of the charging bucket within a specified time, and the gas is purified and recovered, so that the resistance of a bag-type dust collector and a pipeline is overcome, and the gas is smoothly sent to a clean gas low-pressure pipe network.)

1. The utility model provides a clean system is retrieved entirely to blast furnace top charging bucket coal gas which characterized in that includes: the system comprises a gas recovery valve group, a pipeline, a bag-type dust collector, a dust collector inlet valve group, a dust collector outlet valve group, a pneumatic impeller rotating supercharging device, a boosting device and a clean gas pipe network; wherein, the gas recovery valve group is arranged beside the scattered pipeline, the gas recovery valve group is connected with the inlet valve group of the bag-type dust remover through a pipeline, the inlet valve group and the outlet valve group of the bag-type dust remover are communicated with the bag-type dust remover through the inlet and outlet short sections of the bag-type dust remover, the outlet of the outlet valve group of the bag-type dust remover is communicated with the inlet of the pneumatic impeller rotation boosting device, the outlet of the pneumatic impeller rotation boosting device is communicated with the boosting device, the outlet of the boosting device is communicated with the low-pressure pipe network of clean gas, the outlet side of the bag-type dust remover is provided with the pneumatic impeller rotation boosting device, the gas in the charging bucket is forced to flow with high speed under the action of external force, the gas pressure in the charging bucket is rapidly reduced to the working pressure of the charging bucket, the boosting device is arranged on, achieving double guarantee.

2. The blast furnace top bucket coal gas full recovery purification system as claimed in claim 1, wherein the pneumatic impeller rotating supercharging device adopts a gas booster pump or pneumatic turbine blades.

3. The system according to claim 1, wherein a pressure alarm is provided on the charging bucket, the pipeline and the pneumatic impeller rotation boosting device, and a pressure sensor and a sensing signal processing module are provided in the pressure alarm to complete automatic start and stop of the system.

4. The method for fully recovering and purifying the blast furnace top bucket coal gas according to claim 1, which is characterized by comprising the following steps of:

step S1: the pneumatic impeller rotating supercharging device arranged at the outlet side of the bag-type dust collector is utilized to force the coal gas in the charging bucket to flow in an accelerated manner under the action of external force, so that the pressure of the coal gas in the charging bucket is rapidly reduced to the working pressure of the charging bucket;

step S2: the original natural recovery and purification process and the air discharge process are improved into a forced boosting full recovery and purification process by utilizing the pneumatic impeller rotating supercharging device and matching with the boosting device.

Technical Field

The invention belongs to the technical field of environmental protection and energy recycling, and particularly relates to a system and a method for fully recycling and purifying coal gas of a blast furnace top charging bucket.

Background

The gas diffused by the blast furnace top charging bucket in a pressure equalizing way contains a large amount of dust, CO and a small amount of toxic and combustible mixed gas such as H2, CH4 and the like, and the gas needs to be directly diffused into the atmosphere before each charging, so that the atmospheric environment, particularly the production area of the blast furnace, is seriously polluted, and the part of gas energy is wasted. In the normal production process of the blast furnace, the top charging equipment periodically carries out receiving, pressure equalizing, discharging and pressure equalizing gas bleeding, so that in the normal production process of the blast furnace, the pressure equalizing gas is intermittently and periodically bled. The existing pressure-equalizing diffused gas recovery process has the defects that the recovery cost is too high, or complete recovery and dust removal cannot be realized, and both economic benefits and environmental protection benefits cannot be realized simultaneously. And a plurality of patents exist in China, whether a cyclone dust collector and a buffer tank are additionally arranged or a fan is additionally arranged, and the systems are complex in equipment and high in energy consumption.

Disclosure of Invention

In view of the above problems, the present invention provides a system and a method for fully recovering and purifying blast furnace top bucket gas, which are used in a fully recovering and purifying process of blast furnace top bucket gas, so as to overcome the above disadvantages of the prior art.

The invention provides a blast furnace top charging bucket coal gas full recovery and purification system, which comprises: the system comprises a gas recovery valve group, a pipeline, a bag-type dust collector, a dust collector inlet valve group, a dust collector outlet valve group, a pneumatic impeller rotating supercharging device, a boosting device and a clean gas pipe network; wherein, the gas recovery valve group is arranged beside the scattered pipeline, the gas recovery valve group is connected with the inlet valve group of the bag-type dust remover through a pipeline, the inlet valve group and the outlet valve group of the bag-type dust remover are communicated with the bag-type dust remover through the inlet and outlet short sections of the bag-type dust remover, the outlet of the outlet valve group of the bag-type dust remover is communicated with the inlet of the pneumatic impeller rotation boosting device, the outlet of the pneumatic impeller rotation boosting device is communicated with the boosting device, the outlet of the boosting device is communicated with the low-pressure pipe network of clean gas, the outlet side of the bag-type dust remover is provided with the pneumatic impeller rotation supercharging device to force the gas in the charging bucket to flow in an accelerating way under the action of external force, so that the gas pressure in the charging bucket is rapidly reduced to the working pressure of the charging bucket, the, achieving double guarantee.

Preferably, the pneumatic impeller rotation supercharging device adopts a gas booster pump or a pneumatic turbine blade.

Preferably, a pressure alarm is arranged on the charging bucket, the pipeline and the pneumatic impeller rotation boosting device, a pressure sensor and a sensing signal processing module are arranged in the pressure alarm, and the automatic opening and closing of the system can be completed.

The invention also aims to provide a method for fully recovering and purifying the gas of the blast furnace top charging bucket, which comprises the following steps:

step S1: the pneumatic impeller rotating supercharging device arranged at the outlet side of the bag-type dust collector is utilized to force the coal gas in the charging bucket to flow in an accelerated manner under the action of external force, so that the pressure of the coal gas in the charging bucket is rapidly reduced to the working pressure of the charging bucket;

step S2: the original natural recovery and purification process and the air discharge process are improved into a forced boosting full recovery and purification process by utilizing the pneumatic impeller rotating supercharging device and matching with the boosting device.

The invention has the advantages and positive effects that: the pneumatic impeller rotating supercharging device is utilized to force the gas pressure in the charging bucket to be reduced to the working pressure of the charging bucket within a specified time, and the gas is purified and recovered, under the normal condition, a motor is not required to be added, the resistance of a bag-type dust collector and a pipeline is overcome, the gas is smoothly sent to a clean gas low-pressure pipe network, the system is improved from a semi-recovery process to a full-recovery process, no power consumption is increased, the operation cost is reduced, and energy recovery and reutilization are realized.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

FIG. 1 is a flow diagram of a dedusting process according to an embodiment of the present invention.

Wherein the reference numerals include: the device comprises a gas recovery valve group 1, a pipeline 2, a bag-type dust collector 3, a dust collector inlet valve group 4, a dust collector outlet valve group 5, a pneumatic impeller rotating supercharging device 6, a boosting device 7, a clean gas pipe network 8 and a pressure alarm 9.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.