Calculation model for design and operation of ammonia process desulfurization spray tower and optimized regulation method

A technology of ammonia desulfurization and calculation model, which is applied in chemical instruments and methods, separation methods, gas treatment, etc., and can solve problems such as inability to meet technical requirements and waste of resources.

Active Publication Date: 2016-09-28
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to overcome the shortcomings that the design and operation of the existing ammonia-based desulfurization spray tower are mainly based on experience, and the system often easily causes waste of resources or cannot meet the technical requirements in the process of design and operation, and provides an ammonia-based desulfurization Calculation model and optimization control method for spray tower design and operation

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
  • Calculation model for design and operation of ammonia process desulfurization spray tower and optimized regulation method
  • Calculation model for design and operation of ammonia process desulfurization spray tower and optimized regulation method
  • Calculation model for design and operation of ammonia process desulfurization spray tower and optimized regulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] The ammonia desulfurization spray tower experimental system of the present embodiment is as follows figure 1 As shown, the diameter D of the spray tower is 0.3m, and the height Z of the absorption zone is 2.0m. The ammonia method desulfurization spray tower system includes a spray tower 10, the inside of the spray tower 10 includes a demister area, a spray area and a slurry tank 11 from top to bottom, and the demist area is provided with a demister 9, and the demister The top of the device 9 is provided with a flue gas outlet, and the flue gas outlet is connected with the tail gas discharge pipe, and the tail gas discharge pipe is provided with a control cabinet 13 . The spray area is provided with a spray pipe, and the water inlet of the spray pipe communicates with the bottom of the slurry tank 11 through a circulation pipe and a circulation pump 12 . The bottom of the slurry tank 11 is also connected to the air pump 8 through a pipeline. from SO 2 SO in cylinder 1...

Embodiment 2

[0197] A calculation model for the design and operation of the ammonia-based desulfurization spray tower in this embodiment. The model is firstly based on the characteristics of the spray tower ammonia-based flue gas desulfurization process, and the pH value and flue gas flow rate u are selected. g And the liquid-gas ratio L / Q is used as a parameter to calculate different pH values ​​and flue gas flow rates u g Ammonia desulfurization of SO under the condition of liquid-gas ratio L / Q 2 Absorb mass transfer rate, and use numerical fitting method to construct a universally applicable ammonia desulfurization SO 2 The expression of the absorption mass transfer coefficient; then analyze the ion charge conservation and element material conservation in the liquid phase, according to the NH 3 -SO 2 -H 2 The thermodynamic characteristics of O system and the principle of ion balance to establish SO in the spray tower 2 Gas-liquid dynamic equilibrium relationship during absorption, c...

Embodiment 3

[0249] use as figure 1 The shown spray tower ammonia desulfurization experimental system is tested, the pH of the slurry is controlled to be 3, and the flue gas flow rate is u g is 2.56m / s, and the liquid-gas ratio is 1.5L / m 3 , the experimentally measured SO at the inlet of the spray tower 2 Concentration is 360ppm, SO at the outlet of spray tower 2 The concentration is 171ppm, according to the formula: Calculated to get SO 2 The removal efficiency is 52.5%.

[0250] Set the experimental condition pH to 3, u g is 2.56m / s, and the liquid-gas ratio is 1.5L / m 3 , into the ammonia desulfurization SO established in Example 2 2 In the absorption model, according to the steps in Example 2, the calculation of SO 2 The removal efficiency is 68.86%. The error between the two is 23.76%.

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

PropertyMeasurementUnit
Kinematic viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a calculation model for design and operation of an ammonia process desulfurization spray tower and an optimized regulation method and belongs to the technical field of ammonia process smoke desulfurization. Firstly, based on the characteristics of the ammonia process desulfurization process, the pH value, the smoke flow rate and the liquid-gas ratio are selected as parameters, and an ammonia process desulfurization SO2 absorption mass transfer coefficient expression with general applicability is established. On the basis, ionic-charge charge conservation and element material charge conservation in a liquid phase are analyzed, the gas-liquid dynamic balance relation in the SO2 absorption process in the spray tower is established through the combination with the thermodynamic property and ionic equilibrium principle of an NH3-SO2-H2O system, and a mathematic model capable of reflecting the spray tower ammonia process desulfurization SO2 absorption process is established. By means of the model, the influences of different technological conditions on the ammonia process desulfurization SO2 removal rate can be calculated, a theoretical direction can be provided for design and operation of the ammonia process desulfurization absorption tower in the industry, and great practical significance and engineering application value are achieved.

Description

technical field [0001] The invention belongs to the technical field of ammonia-based flue gas desulfurization, and more specifically relates to a calculation model and an optimization control method for the design and operation of an ammonia-based desulfurization spray tower. Background technique [0002] SO in coal flue gas 2 It can cause environmental problems such as acid rain and smog, and is one of the main air pollutants in my country at present. Ammonia flue gas desulfurization is based on ammonia (NH 3 ) is the absorbent to absorb SO in the flue gas 2 , so as to obtain ammonium sulfate by-product (the main reaction formula is as formula (1) ~ (5)), and will not cause secondary pollution. This technology can alleviate the shortage of sulfur resources in my country to a certain extent while controlling flue gas pollution It has broad application prospects in our country. [0003] 2NH 3 +H 2 O+SO 2 →(NH 4 ) 2 SO 3 (1) [0004] (NH 4 ) 2 SO 3 +SO 2 +H 2 O...

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
IPC IPC(8): B01D53/78B01D53/50
CPCB01D53/502B01D53/78B01D2258/0283B01D2259/124
Inventor 贾勇殷李国吴胜华陈光李智芳丁希楼陈宜华戴波
Owner ANHUI UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap