Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Intelligent control system for flue gas denitration of annealing furnace

An intelligent control system and annealing furnace technology, applied in the field of flue gas denitrification, can solve the problems of poor effect and high labor cost, and achieve the effect of fast response and high precision

Pending Publication Date: 2022-01-11
河北林格环保科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes an intelligent control system for flue gas denitrification of annealing furnace, which solves the problems of high labor cost and poor effect of flue gas denitrification of annealing furnace in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Intelligent control system for flue gas denitration of annealing furnace
  • Intelligent control system for flue gas denitration of annealing furnace
  • Intelligent control system for flue gas denitration of annealing furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1, such as image 3 as shown,

[0030] The urea injection control unit includes a nozzle control circuit, the nozzle control circuit includes a diode D1 and a transistor Q2, the gate of the transistor Q2 is connected to the PB_PWM signal output by the central control unit, the emitter of the transistor Q2 is grounded, and the collector of the transistor Q2 is connected in series with the nozzle electromagnetic The cathode of the diode D1 is connected behind the valve YV1, and the anode of the diode D1 is connected to the power supply VBAT through the inductor L1.

[0031] The urea nozzle is a component that realizes the precise injection of urea solution. The main part of the nozzle is a solenoid valve, so the control of the nozzle by this system is essentially the control of the solenoid valve. Its main function is to atomize and spray the urea water mixed with air. The principle is to control the opening and closing of the solenoid valve of the nozzle by usin...

Embodiment 2

[0033] Example 2, such as Figure 4 as shown,

[0034]On the basis of Embodiment 1, the nozzle control circuit also includes a pulse width modulation chip U1, a diode D2, a resistor R1, a resistor R2, a capacitor C1, and a transistor Q1. The input pin Vi of the pulse width modulation chip U1 is connected to the power supply BAT, and the pulse The voltage feedback pin VFB of the width modulation chip U1 is connected to the cathode of the diode D2, the anode of the diode D2 is connected to the PB_CUT signal output by the central control unit, the output terminal OUT of the pulse width modulation chip U1 is connected to the gate of the transistor Q1 through the resistor R3, and the transistor Q1 The emitter of transistor Q1 is grounded through resistor R5, the collector of transistor Q1 is connected to the anode of diode D1, the positive pole of capacitor C1 is connected to the cathode of diode D1, and the negative pole is grounded. The first end of resistor R1 is connected to th...

Embodiment 3

[0038] Example 3, such as Figure 5 as shown,

[0039] The urea injection control unit includes a jet pump control circuit, the jet pump control circuit includes driver chips U2 and U3, the input pin IN of the driver chip U2 is connected to the PB_M1 signal output by the central control unit, and the output pin OUT of the driver chip U2 is connected to the jet pump motor The input pin IN of the drive chip U3 is connected to the PB_M2 signal output by the central control unit, and the output pin OUT of the drive chip U3 is connected to the second end of the jet pump motor.

[0040] The injection pump is a power device for injecting urea water in the pipeline. It mainly uses the rotation of the internal DC motor rotor to make the eccentric wheel on the shaft drive the diaphragm to reciprocate, thereby adjusting the injection pressure inside the pipeline. This pressure can be divided into There are two parts, positive pressure and negative pressure. Negative pressure can be used...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of flue gas denitration, and provides an intelligent control system for flue gas denitration of an annealing furnace. The system comprises a central control unit, a signal acquisition unit and a urea injection control unit; the signal acquisition unit is in communication connection with the central control unit; the urea injection control unit is electrically connected with the central control unit; the urea injection control unit comprises a nozzle control circuit, the nozzle control circuit comprises a diode D1 and a transistor Q2, a gate pole of the transistor Q2 is connected with a PB_PWM signal output by the central control unit, an emitting electrode of the transistor Q2 is grounded, a collector electrode of the transistor Q2 is connected with a cathode of the diode D1 after being connected with a nozzle electromagnetic valve YV1 in series, and an anode of the diode D1 is connected with a power supply VBAT through an inductor L1; and the central control unit reads flue gas parameter information sent by the signal acquisition unit. Sprayed urea water is not too high or too low through the nozzle control circuit, and it is ensured that flue gas treated by an SCR processor can be accurately discharged in a standard reaching mode.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to an intelligent control system for flue gas denitrification of annealing furnaces. Background technique [0002] An annealing furnace is a device specially designed for heating semiconductor wafers, which involves heating multiple semiconductor wafers to affect their electrical properties. The annealing furnace generally uses natural gas or coke oven gas as fuel, which is combusted in a radiant tube after being properly proportioned with air, and flue gas is emitted after the gas is burned. In order to prevent the environment from being polluted by excessive NOx after coal combustion in the boiler, the gas should be denitrified. [0003] Generally, the reducing agent NH is introduced into the exhausted flue gas 3 Processed, NH 3 After mixing with the flue gas, under the action of the catalyst, it selectively reacts with NO and NO in the flue gas 2 Carry out a ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/30B01D53/90B01D53/56
CPCB01D53/30B01D53/8696B01D53/90B01D53/8625B01D2251/2062B01D2258/0283
Inventor 田维太田月李彦兴马晓然曹树余周柳春
Owner 河北林格环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com