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Control method and system for industrial process waste gas treatment and recycling

A waste gas treatment and industrial process technology, applied in the direction of control/regulation system, gas treatment, separation method, etc., to achieve the effect of realizing process requirements and meeting the requirements of emission measures

Active Publication Date: 2021-01-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem of the total amount of ambient air utilization in the process of waste gas pollution control in industrial processes, the partial combustion process or other air utilization processes, the present invention proposes a control method and control system for waste gas treatment and recycling in industrial processes, which can be applied to Waste gas emission management of industrial kilns, foundries, hazardous waste warehouses, surface coating and painting, so that they can adapt to different environmental protection requirements and various technical specifications specified by different departments

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  • Control method and system for industrial process waste gas treatment and recycling

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Embodiment 1

[0030] In this embodiment, the above-mentioned system is used in the combustion environment, and the relationship between the combustion environments Q1, Q2 and Q3 is illustrated by taking a natural gas furnace as an example. Q3 is the amount of exhaust gas corresponding to a certain oxygen content y% produced by the combustion of Q2, Q1=9.524(m-1)Q, and the (actual wet base flow rate) exhaust gas circulation ratio is Q1 / Q3. Q is the amount of natural gas required for the thermal design of the kiln, in m 3 / h.

[0031] The thermal design of the kiln requires the consumption of natural gas to be Q m 3 / h (standard state), the required theoretical air volume is 9.524Qm 3 / h, the theoretical wet flue gas volume produced by combustion is 10.524Q m 3 / h, the exhaust gas volume on a dry basis is 8.524Q m 3 / h. The combustion process needs to meet the requirements of low nitrogen combustion and exhaust gas oxygen content (such as 3% (v / v)). If the temperature control required f...

Embodiment 2

[0036] If the above system is used in non-combustible environments (such as hazardous waste warehouses, painting, casting, building materials production, etc.), the following uses hazardous waste warehouses as an example to illustrate warehouse ventilation and VOCs (volatile organic compounds) control methods:

[0037] The ventilation requirement for temporary storage of hazardous waste is generally 3-6 times / hour. For an area of ​​3000m 2 , for a standard warehouse with a height of 15m, the air exchange flow M should generally be greater than 135,000m 3 / h, all waste gas treatment adopts RTO incineration to treat waste gas emission, the cost is high, and the ventilation waste gas of general hazardous waste warehouses has more acidic and alkaline gases, and the concentration of VOCs is lower. Therefore, the exhaust gas treatment device 6 can use acid-base dual-function single-tower double-circulation to process the acid-base gas in the exhaust gas. After the circulating gas (...

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Abstract

The invention discloses a control method and a system for industrial process waste gas treatment and cyclic utilization, and the control method comprises the steps: enabling one part of waste gas generated by a gas utilization device to flow back to the gas utilization device after treatment, and enabling the other part of waste gas to reach the standard and be discharged after standard treatment;the system comprises a waste gas exhaust pipeline and a waste gas circulating pipeline, an air inlet blower, a gas utilization device, a waste gas treatment device, a waste gas distribution device, awaste gas standard treatment device, an exhaust induced draft fan and an exhaust funnel are sequentially arranged on the waste gas exhaust pipeline; the waste gas circulating pipeline is connected between the gas utilization device and the waste gas distribution device; and a circulating air blower and / or a circulating induced draft fan are / is arranged on the waste gas circulating pipeline. According to the method, the exhaust gas circulation amount is determined according to up-to-standard emission of the exhaust gas, and the method is matched with an exhaust gas pollutant treatment measurebefore circulation and an exhaust gas pollutant treatment measure after circulation before exhaust gas emission for use, so that the process requirements of thermal engineering or working condition parameters can be met, and meanwhile, the requirements of exhaust gas emission on air consumption conversion and emission measures are met.

Description

technical field [0001] The invention relates to a waste gas circulation control method and a control system used in the waste gas pollution treatment process, belonging to the technical field of waste gas treatment. Background technique [0002] The outbreak of air pollution phenomena such as smog, ozone, and VOCs has triggered a rapid response to pollution control technologies and emission standards. The biggest difference from the control measures of the water pollution process is that the whole-chain management of water resources, water utilization, water pollution control and wastewater discharge is conducive to the management and quality improvement of the water ecological environment; but the utilization of air and the total amount of pollutants in waste gas However, it is difficult to perfect the management process in terms of quantity and concentration discharge. In general, there are no related fees and management requirements for the use of ambient air, only the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/02F23G7/06G06F17/18G01N33/00G05D11/13
CPCB01D53/02B01D2253/102B01D2258/02B01D2258/025B01D2258/0258F23G7/06G01N33/0047G05D11/138G06F17/18
Inventor 苏继新曹晓晴高雪郑凯吴珊张启彦冯承湖
Owner SHANDONG UNIV