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A blast furnace blower filter air differential pressure over-limit protection device

A blast furnace blast and protection device technology, applied in the direction of valve devices, mechanical equipment, engine components, etc., can solve the problems of damaged fan structure, high air inlet differential pressure, and increased unit consumption of fan operation, so as to ensure normal air inlet, The effect of fast response and avoiding damage

Active Publication Date: 2022-04-15
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this setting are also highlighted at the same time: once the filter cartridge in the air filter chamber is blocked, or the filter screen of the dehumidifier is blocked, the air inlet differential pressure will be extremely high, resulting in an increase in the unit consumption of the fan. If the blockage is extremely serious, it will It will lead to paralysis of the air intake system of the fan, an irreversible suction accident, direct damage to the fan structure, and irreparable huge economic losses. Therefore, a new solution is urgently needed to solve this technical problem

Method used

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  • A blast furnace blower filter air differential pressure over-limit protection device
  • A blast furnace blower filter air differential pressure over-limit protection device
  • A blast furnace blower filter air differential pressure over-limit protection device

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: see figure 1 , figure 2 , a blast furnace blower filter air differential pressure overrun protection device, the protection device includes a pneumatic control direct-to-atmosphere quick opening device 2, a bypass air inlet pipe 3, a blast furnace blower unit 4, an air outlet pipe 5, an air inlet pipe 6, Dehumidifier 7, air inlet differential pressure measuring point 8 and air filter chamber 9, the air filter chamber 9 and dehumidifier 7 are integrally arranged on the side of the blast furnace blower unit 4, wherein the air filter chamber 9 communicates with the dehumidifier 7 Installation, the air is inhaled from the inlet on the left side of the air filter chamber 9, the outlet of the dehumidifier 7 is connected to the inlet of the blast furnace blower through the air inlet pipe 6, and a bypass air inlet pipe 3 is installed between the dehumidifier 7 and the fan inlet pipe 6 , in the middle of the bypass air inlet pipe 3, a pneumatic control direct-to-...

Embodiment 2

[0019] Example 2: see Figure 1-Figure 4, a blast furnace blower filter air differential pressure overrun protection device control method, the method is as follows: When the fan inlet differential pressure exceeds the alarm value 1.5Kpa, the DCS control system receives the differential pressure value, compared with the set value 1.5Kpa, Output 4-20mA signal to control the pneumatic straight-through device to adjust the opening size step by step until the differential pressure at the fan inlet is maintained at about 1.5Kpa, so that the maintenance personnel can further check the blockage of the filter cartridge of the fan filter chamber and replace the filter cartridge gain time. When the differential pressure at the inlet of the fan directly exceeds the upper limit value of 3.5Kpa in an instant, the DCS control system receives the differential pressure signal and directly triggers the output switch signal, forcing the two-way solenoid valve of the pneumatic straight-through d...

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Abstract

The invention relates to a blast furnace blower filter air differential pressure overrun protection device, the protection device includes a pneumatic control direct-to-atmosphere quick opening device, a bypass air inlet pipe, a blast furnace blower unit, an air outlet pipe, an air inlet pipe, and a dehumidifier , the air inlet differential pressure measuring point and the air filter chamber, the air filter chamber and the dehumidifier are arranged on one side of the blast furnace blower unit as a whole, the air filter chamber and the dehumidifier are connected and installed, and the air is sucked from the left inlet of the air filter chamber , the outlet of the dehumidifier is connected to the inlet of the blast furnace blower through the air inlet pipe, a bypass air inlet pipe is installed between the dehumidifier and the fan air inlet pipe, and a pneumatic control direct-to-atmosphere quick opening device is installed in the middle of the bypass air inlet pipe ; The structure of this scheme is ingenious and compact, and a fast bypass air inlet pneumatic through-through device is used to ensure the safe operation of the fan.

Description

technical field [0001] The invention relates to a protection device, in particular to a blast furnace blower air filter differential pressure overrun protection device, which belongs to the technical field of automatic control and detection. Background technique [0002] The blast furnace blower is to compress the air, output hot air with a certain pressure and temperature, and send it to the blast furnace hot blast stove for ironmaking production. It is an extremely important power equipment in ironmaking production. The blower inlet is equipped with an air filter device, the purpose of which is to filter and separate large particles of dust and impurities in the air, and send relatively pure air to the compressor to do work, so as to prevent the air with high dust content from entering the fan and damage the fan blades, reducing Fan operating life. [0003] At present, air filter chambers and dehumidifiers are generally installed at the entrance of large-scale blast furna...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K37/00F16K17/20B01D46/42B01D46/46
CPCF16K37/005F16K17/20B01D46/0087B01D46/446B01D46/46
Inventor 成涛
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD