An automatic control device for residual oxygen content in WSA incinerator
By designing an automatic control device and using the read oxygen content to control the combustion-assisted air regulating valve, the automatic control of the residual oxygen content of the WSA incinerator is achieved, which solves the problems of untimely, unstable and inaccurate manual control, improves the stability and accuracy of control, and reduces natural gas consumption.
Patent Information
- Application Number
- CN202421434873.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The residual oxygen content of WSA incinerator is manually controlled by the operator, and there are problems of untimely, unstable and inaccurate adjustments, resulting in fluctuations in the incinerator temperature and increased natural gas consumption, which poses safety hazards.
An automatic control device is designed, including an incinerator, acid gas inlet, natural gas regulating valve, combustion air regulating valve, flue gas outlet and residual oxygen content controller. By reading the oxygen content, controlling the combustion-assisted air regulating valve, the outlet air volume of the hot air fan is linearly related to the residual oxygen content of the WSA incinerator, and automatic control is achieved.
The automatic control of the residual oxygen content of WSA incinerator is realized, which improves the stability and accuracy of control, reduces the frequency of operator adjustment, reduces natural gas consumption, and improves the energy saving and consumption reduction of incinerator and the safety of temperature control.
Smart Images
Figure CN222732835U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wet acid production technology, in particular to an automatic control device for residual oxygen content in a WSA incinerator. Background Art
[0002] The wet gas sulphufic acid (WSA) process developed by Denmark's Topsoe in the mid-1980s mainly converts various sulfides in acid gas into concentrated sulfuric acid. This process is particularly suitable for treating acid gas with low sulfur content that cannot be treated by conventional acid production processes. As an important equipment in the sulfuric acid plant, the WSA incinerator is mainly used to realize the reaction of acid gas and combustion air to generate sulfur dioxide. In actual production, the residual oxygen content AIC15 of the WSA incinerator is the key process parameter for controlling the combustion air entering the incinerator to participate in the combustion reaction. Improper control will lead to incomplete combustion of acid gas or heat loss in the furnace, resulting in increased natural gas consumption. There are many factors that affect the residual oxygen content of the incinerator. Among them, the level and stability of the combustion air volume of the WSA incinerator will directly affect the stability and economy of the incinerator operation. Therefore, the precise control of the combustion air volume of the WSA incinerator is particularly important.
[0003] Existing problems: Under normal circumstances, the residual oxygen content of the WSA incinerator is controlled by the operator through manual increase or decrease of the hot air blower outlet air volume based on experience. There are frequent manual adjustments, and the combustion air volume cannot be adjusted in a timely, stable and accurate manner, which poses safety hazards and wastes natural gas. Failure to adjust in time can easily cause the furnace temperature of the incinerator to fluctuate or even exceed the standard, resulting in increased natural gas consumption.
[0004] Therefore, developing a stable and efficient WSA incinerator residual oxygen content automatic control system to achieve automatic control and adjustment of residual oxygen content has great practical value for energy-saving operation and temperature control of the incinerator. Summary of the invention
[0005] In order to solve the above problems, the utility model provides an automatic control device for the residual oxygen content of a WSA incinerator, comprising: an incinerator, an acid gas inlet, an acid gas quick-closing valve, a natural gas inlet, a natural gas regulating valve, a combustion-supporting air inlet, a combustion-supporting air regulating valve, a flue gas outlet and a residual oxygen content controller; the acid gas inlet is connected to the incinerator through the acid gas quick-closing valve; the natural gas inlet is connected to the incinerator through the natural gas regulating valve; the combustion-supporting air inlet is connected to the incinerator through the combustion-supporting air regulating valve; the flue gas outlet is connected to the incinerator, and a residual oxygen content controller is provided at the flue gas outlet; the residual oxygen content controller is connected to the combustion air regulating valve signal. The residual oxygen content controller can control the combustion-supporting air regulating valve by reading the oxygen content.
[0006] Furthermore, the combustion air inlet is provided with a first hot air blower and a second hot air blower, the first hot air blower and the second hot air blower are connected to the combustion air regulating valve; the first hot air blower is provided with a first hot air blower motor frequency regulator, the second hot air blower is provided with a second hot air blower motor frequency regulator, the first hot air blower motor frequency regulator and the second hot air blower motor frequency regulator are connected to the residual oxygen content controller signal. The residual oxygen content controller further adjusts the combustion air volume by adjusting the first hot air blower motor frequency regulator and the second hot air blower motor frequency regulator.
[0007] The utility model utilizes the linear relationship between the hot air blower outlet air volume and the residual oxygen content of the WSA incinerator, and automatically controls the residual oxygen content through a residual oxygen content regulating controller to address the shortcomings of operators such as untimely adjustment, frequent or delayed adjustment, poor control stability, and poor automation level.
[0008] The utility model has the characteristics of high automation level, easy use, stable control, strong practicality, etc. It will greatly reduce the adjustment frequency of operators and has great practical value for energy saving and consumption reduction, temperature control and safe and stable operation of the incinerator of the WSA sulfuric acid device. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the structure of the automatic control device for the residual oxygen content of the WSA incinerator.
[0010] Reference numerals:
[0011] 1: Incinerator; 2: First hot air blower; 3: Second hot air blower; 4: Residual oxygen content controller; 6: First hot air blower motor frequency regulator; 7: Second hot air blower motor frequency regulator; 8: Combustion air regulating valve; 9: Natural gas regulating valve; 10: Acid gas quick closing valve. DETAILED DESCRIPTION
[0012] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.
[0013] like Figure 1As shown, an automatic control device for the residual oxygen content of a WSA incinerator is provided, comprising: an incinerator 1, an acid gas inlet, an acid gas quick-closing valve 10, a natural gas inlet, a natural gas regulating valve 9, a combustion air inlet, a combustion air regulating valve 8, a flue gas outlet and a residual oxygen content controller 4; the acid gas inlet is connected to the incinerator 1 through the acid gas quick-closing valve 10; the natural gas inlet is connected to the incinerator 1 through the natural gas regulating valve 9; the combustion air inlet is connected to the incinerator 1 through the combustion air regulating valve 8; the flue gas outlet is connected to the incinerator 1, and a residual oxygen content controller 4 is provided at the flue gas outlet; the residual oxygen content controller 4 is signal-connected to the combustion air regulating valve 8. The residual oxygen content controller can control the combustion air regulating valve by reading the oxygen content, and adopts the product of Shenzhen Langhong Technology Co., Ltd., model OCM6000 series product.
[0014] The combustion air inlet is provided with a first hot air blower 2 and a second hot air blower 3, and the first hot air blower 2 and the second hot air blower 3 are connected to the combustion air regulating valve 8; the first hot air blower 2 is provided with a first hot air blower motor frequency regulator 6, and the second hot air blower 3 is provided with a second hot air blower motor frequency regulator 7, and the first hot air blower motor frequency regulator 6 and the second hot air blower motor frequency regulator 7 are connected to the residual oxygen content controller 4 by signal. The residual oxygen content controller further adjusts the combustion air volume by adjusting the first hot air blower motor frequency regulator and the second hot air blower motor frequency regulator, and the frequency converter adopts the frequency converter of AB frequency converter company model power 755flex 550kW.
[0015] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.
Claims
1. An automatic control device for residual oxygen content in a WSA incinerator, characterized in that: include: Incinerator, acid gas inlet, acid gas quick-closing valve, natural gas inlet, natural gas regulating valve, combustion-supporting air inlet, combustion-supporting air regulating valve, flue gas outlet and residual oxygen content controller; the acid gas inlet is connected to the incinerator through the acid gas quick-closing valve; the natural gas inlet is connected to the incinerator through the natural gas regulating valve; the combustion-supporting air inlet is connected to the incinerator through the combustion-supporting air regulating valve; the flue gas outlet is connected to the incinerator, and the flue gas outlet is provided with a residual oxygen content controller; the residual oxygen content controller is connected to the combustion air regulating valve signal.
2. The automatic control device for residual oxygen content in a WSA incinerator according to claim 1, characterized in that: The combustion air inlet is provided with a first hot air blower and a second hot air blower, and the first hot air blower and the second hot air blower are connected to the combustion air regulating valve; the first hot air blower is provided with a first hot air blower motor frequency regulator, and the second hot air blower is provided with a second hot air blower motor frequency regulator, and the first hot air blower motor frequency regulator and the second hot air blower motor frequency regulator are connected to the residual oxygen content controller signal.