Vanadium extraction converter gas recovery system based on gas holder parallel operation technology

Abstract

The utility model relates to the technical field of gas recovery in the metallurgical industry, in particular to a vanadium extraction converter gas recovery system based on a gas cabinet parallel operation technology. The vanadium extraction converter gas recovery system based on the gas holder parallel operation technology comprises a gas collection and primary dust removal system, a gas recovery pipeline arrangement system, a gas transmission and distribution storage system and a gas secondary dust removal and application system. Each vanadium extraction converter is connected in series with one set of gas collection and primary dust removal system, and all the sets of gas collection and primary dust removal systems are connected in parallel, are used for collecting collected and treated gas and inputting the collected and treated gas into the gas transmission, distribution and storage system; and the coal gas transmission and distribution storage system distributes the collected coal gas to the coal gas secondary dust removal and application system. According to the vanadium extraction converter gas recovery system based on the gas holder parallel operation technology, gas generated by the vanadium extraction converter can be effectively collected and utilized, and energy waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas recovery in the metallurgical industry, in particular to a vanadium extraction converter gas recovery system based on the gas cabinet parallel operation technology. Background Art

[0002] During the vanadium-extraction converter production process, carbon in molten iron reacts with blown-in oxygen at high temperatures to produce a mixture of carbon monoxide and a small amount of carbon dioxide. Successfully recovered, this mixture can be used as a medium-calorific value gas fuel within steel companies. Due to the unique characteristics of vanadium extraction and steelmaking, converter gas is frequently generated, with short generation times per furnace, low volume, and low CO content. Furthermore, gas recovery equipment must possess features such as rapid high-to-low speed switching, precise dust removal, high control accuracy, strong corrosion resistance (acidic condensate is highly corrosive), and strong adaptability.

[0003] The main problems with not recycling vanadium-extracting converter gas are: it is directly released into the air or burned, causing severe environmental pollution; the process is energy-intensive; and atmospheric CO and dust levels exceed standards, posing significant safety risks. Therefore, research and development of processes and equipment for recycling vanadium-extracting converter gas is imperative. Utility Model Content

[0004] In view of this, the utility model provides a vanadium-extracting converter gas recovery system based on the gas cabinet parallel operation technology, which can at least solve the technical problem that the existing vanadium-extracting converter gas is difficult to recover.

[0005] The utility model provides a vanadium-extracting converter gas recovery system based on gasholder parallel operation technology. The system comprises: a gas collection and primary dust removal system, a gas recovery pipeline layout system, a gas transmission, distribution, and storage system based on the parallel operation technology, and a gas secondary dust removal and application system. Each vanadium-extracting converter is connected in series with a gas collection and primary dust removal system, and each gas collection and primary dust removal system is connected in parallel. Three to four gas collection and primary dust removal systems form a group. The collected and processed gas is collected and fed into the gas transmission, distribution, and storage system through the gas recovery pipeline layout system. The gas transmission, distribution, and storage system then distributes the collected gas to the gas secondary dust removal and application system through the gas recovery pipeline layout system.

[0006] In some embodiments, the gas transmission, distribution and storage system includes 2 to 3 gas holders, and each group of multiple gas collection and primary dust removal systems are collected and input into one gas holder through a gas recovery pipeline layout system; a pressure regulating valve is provided at the rear end of each gas holder; the front ends of multiple gas holders are connected in series through a gas recovery pipeline layout system, and a connecting valve is provided on the pipeline between two adjacent gas holders.

[0007] In some embodiments, the pressure difference between the storage pressures of every two gas tanks is between 0.1 and 0.3 KPa.

[0008] In some embodiments, the communication valve is a bypass valve.

[0009] In some embodiments, the bypass valve is normally closed; the gas transmission, distribution, and storage system includes a communication valve control system. The communication valve control system is configured to use the higher-pressure gas tank as a primary control unit and utilize the pressure of the higher-pressure gas tank to track the pressure of the lower-pressure gas tank to adjust the opening of the bypass valve.

[0010] In some embodiments, the gas secondary dust removal and utilization system includes two to four wet electrostatic precipitators arranged in parallel, each connected to the rear end of each gas cabinet via a gas recovery piping system. The gas secondary dust removal and utilization system also includes two to four gas compressors arranged in parallel, each connected to the gas outlet of each wet electrostatic precipitator via a gas recovery piping system.

[0011] In some embodiments, each gas compressor is connected to an energy application device or an energy station via a gas recovery pipeline arrangement system.

[0012] In some embodiments, the coal gas collection and primary dust removal system includes at least a coal gas collection hood, a vaporization cooling flue, a water-cooling jacket, a non-metallic compensator, an evaporative cooler, an evaporative cooler outlet section, an evaporative cooler outlet riser, an evaporative cooler outlet horizontal section, a secondary evaporation washing section, a collector, an annular seam venturi, an annular seam hydraulic station, a downcomer, an elbow dehydrator, a horizontal water mist separator, and a centrifugal fan connected in sequence.

[0013] In some embodiments, the gas collection hood includes a movable skirt and a hood control system. The movable skirt is adjustable up and down along the vaporization cooling flue. The hood control system is configured to automatically adjust the annular gap between the movable skirt and the vanadium extraction converter furnace mouth based on the smelting process, oxygen flow rate, and calculated gas generation, to maintain a stable differential pressure at the furnace mouth of 0.25 kPa ± 0.1 kPa.

[0014] In some embodiments, the evaporative cooler uses a three-stage atomization nitrogen atomization nozzle; the first stage atomization is gas-pressure differential atomization; the second stage atomization is mechanical crushing atomization; and the third stage atomization is expansion atomization.

[0015] The beneficial effects of this utility model are as follows: The vanadium-extracting converter gas recovery system, based on the parallel operation technology of gas cabinets, can effectively collect and utilize the gas generated by the vanadium-extracting converter, avoiding energy waste. By performing two dust removal processes on the gas, the dust content in the gas can be greatly reduced, thereby reducing environmental pollution. The parallel operation technology enables the coordinated operation of multiple gas collection and primary dust removal systems, improving production efficiency. Through effective gas recovery and utilization, the operating costs of enterprises can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0017] It should be noted that unless otherwise marked, Figure 1 Patterns with the same shape represent the same structure.

[0018] Figure 1 This is a schematic diagram of a vanadium extraction converter gas recovery system based on gas holder parallel operation technology provided by one embodiment of the utility model;

[0019] Figure 2 A schematic structural diagram of a gas collection and primary dust removal system provided in one embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Vanadium-extracting converter; 2. Gas collection and primary dust removal system; 3. Gas transmission, distribution, and storage system; 4. Gas secondary dust removal and application system; 5. Gas recovery pipeline layout system; 6. Connecting valve; 7. Gas holder; 8. Pressure regulating valve; 9. Wet electrostatic precipitator; 10. Gas compressor; 11. Energy application equipment or energy station; 102. Gas collection hood; 103. Vaporization cooling flue; 104. Water-cooling jacket; 105. Non-metallic compensator; 106. Evaporative cooler; 107. Evaporative cooler outlet section; 108. Evaporative cooler outlet riser; 109. Evaporative cooler outlet horizontal section; 110. Secondary evaporation and washing section; 111. Collector; 112. Annular seam venturi; 113. Annular seam hydraulic station; 114. Downcomer; 115. Elbow dehydrator; 116. Horizontal water mist separator; 117. Centrifugal fan. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0023] like Figure 1 As shown, the present invention provides a vanadium-extracting converter gas recovery system based on parallel operation of gas tanks 7. The system comprises: a gas collection and primary dust removal system 2, a gas recovery pipeline layout system 5, a parallel operation gas transmission, distribution, and storage system 3, and a gas secondary dust removal and application system 4. Each vanadium-extracting converter 1 is connected in series with a gas collection and primary dust removal system 2, and each gas collection and primary dust removal system 2 is arranged in parallel. The gas generated by the vanadium-extracting converter 1 first enters the gas collection and primary dust removal system 2 for preliminary dust removal. Three to four gas collection and primary dust removal systems 2 form a group. The collected and processed gas is collected and fed into the gas transmission, distribution, and storage system 3 via the gas recovery pipeline layout system 5. The gas transmission, distribution, and storage system 3 then distributes the collected gas to the gas secondary dust removal and application system 4 via the gas recovery pipeline layout system 5 for further dust removal and application.

[0024] The proposed vanadium-extraction converter gas recovery system, based on the parallel operation of gas tanks 7, can effectively collect and utilize the gas generated by the vanadium-extraction converter 1, avoiding energy waste. By performing two dust removal processes on the gas, the dust content in the gas can be significantly reduced, thereby reducing environmental pollution. The parallel operation technology enables the coordinated operation of multiple gas collection and primary dust removal systems 2, improving production efficiency. Effective gas recovery and utilization can reduce a company's operating costs.

[0025] In some embodiments, the gas transmission, distribution, and storage system 3 includes two or three gas tanks 7. Multiple gas collection and primary dust removal systems 2 in each group are integrated into a single gas tank 7 via a gas recovery pipeline arrangement system 5. This arrangement ensures that even if one gas tank 7 undergoes maintenance or experiences a malfunction, the other gas tanks 7 can continue to supply gas, ensuring the continuity and stability of the production process. Multiple gas collection and primary dust removal systems 2 in each group are integrated into a single gas tank 7 via a gas recovery pipeline arrangement system 5. This design allows for more centralized gas supply management and improves gas supply stability. A pressure regulating valve 8 is provided at the rear end of each gas tank 7 to automatically adjust gas pressure and prevent leaks or explosions caused by pressure fluctuations. The front ends of the multiple gas tanks 7 are connected in series via the gas recovery pipeline arrangement system 5, and a connecting valve 6 is provided on the pipeline between two adjacent gas tanks 7 to control the interconnection of the gas pipelines at the front ends of each gas tank 7.

[0026] In some embodiments, the pressure difference between the storage pressures of two gas tanks 7 is between 0.1 and 0.3 kPa, preferably controlled at 0.2 kPa, so that the storage pressures of each converter gas tank 7 are adjusted to be substantially consistent. This allows for more effective balancing and regulation of gas supply and demand, reducing gas loss due to emission, thereby improving energy efficiency. Furthermore, a stable gas supply pressure helps ensure smooth production processes, avoiding production interruptions or quality issues caused by gas pressure fluctuations.

[0027] In some embodiments, the connecting valve 6 is a bypass valve, so that multiple converter gas tanks 7 form a technical mode of export-parallel operation.

[0028] In some embodiments, the bypass valve is normally closed. The gas distribution and storage system 3 includes a communication valve control system. This control system uses the higher-pressure gas tank 7 as the primary control unit. The system uses the pressure of the higher-pressure gas tank 7 to track the pressure of the lower-pressure gas tank 7 and adjust the opening of the bypass valve to balance each gas tank 7, ensuring that the pressure difference between each two gas tanks 7 is controlled within 0.1-0.3 kPa.

[0029] In some embodiments, the gas secondary dust removal and utilization system 4 includes two to four wet electrostatic precipitators 9 arranged in parallel, each of which is connected to the rear end of each gas cabinet 7 via a gas recovery piping system 5. The gas secondary dust removal and utilization system 4 also includes two to four gas compressors 10 arranged in parallel; each gas compressor 10 is connected to the gas outlet of each wet electrostatic precipitator 9 via a gas recovery piping system 5.

[0030] In some embodiments, the gas compressor 10 is connected to energy application equipment or an energy station 11 through a gas recovery pipeline arrangement system 5 to facilitate the secondary use of the processed gas.

[0031] like Figure 2 As shown, in some embodiments, the gas collection and primary dust removal system 2 includes at least a gas collection hood 102, a vaporization cooling flue 103, a water-cooling jacket 104, a non-metallic compensator 105, an evaporative cooler 106, an evaporative cooler outlet section 107, an evaporative cooler outlet riser 108, an evaporative cooler outlet horizontal section 109, a secondary evaporation washing section 110, a collector 111, an annular seam venturi 112, an annular seam hydraulic station 113, a downcomer 114, an elbow dehydrator 115, a horizontal water mist separator 116, and a centrifugal fan 117, which are connected in sequence.

[0032] Specifically, the gas collection hood 102 is used to capture the high-temperature dust-laden gas generated from the vanadium-extracting converter 1 and is located at the furnace mouth of the converter to maximize the collection of flue gas. The high-temperature gas collected by the hood first passes through the vaporization cooling flue 103, whose main function is to reduce the temperature of the gas. During the cooling process, a water-cooling jacket 104 is wrapped around certain key equipment to further assist in cooling. Since high-temperature gas will cause pipeline expansion during transmission, the non-metallic compensator 105 is mainly used to absorb the displacement caused by these thermal expansions to maintain the structural safety and sealing of the system. The gas after preliminary cooling enters the evaporative cooler 106, where the gas is further cooled by contact heat exchange with atomized water droplets, and rough dust removal is carried out at the same time. The design of the evaporative cooler 106 ensures sufficient heat exchange time, ensures that the gas is in full contact with the atomized water droplets, and improves the dust removal effect. After cooling and rough dust removal, the gas is discharged through the evaporative cooler outlet section 107 and transported via the evaporative cooler outlet riser 108 to the evaporative cooler outlet horizontal section 109, where it enters the subsequent main dust removal equipment. Before entering the main dust removal equipment, the gas passes through a secondary evaporative scrubbing section 110 to further clean and condition the gas to meet more stringent environmental standards. The secondary evaporative scrubbing gas is collected in a collector 111. The provision of an annular gap venturi 112 effectively controls the high-speed flow of gas, helping to maintain stable airflow within the system. The annular gap hydraulic station 113 provides the necessary power source for the annular gap venturi 112, adjusting the size of the annular gap through the hydraulic system to precisely control the gas flow rate and velocity. The downcomer 114 and elbow dehydrator 115 work together to remove moisture from the gas, preventing it from entering subsequent equipment and causing corrosion or compromising dust removal effectiveness. Horizontal mist separator 116 then further separates the water mist and fine particulate matter from the gas, ensuring even cleaner gas before entering the fan and exhaust system. The treated gas is then transported to the gas distribution and storage system via centrifugal fan 117, ensuring continuity and efficiency throughout the collection and dust removal process.

[0033] The coal gas collection and primary dust removal system 2 of this application works closely together from the initial collection of coal gas, gradual cooling, coarse and fine dust removal, to the final clean coal gas emission, ensuring the safe and efficient operation of the entire system, improving the level of environmental protection, optimizing energy recovery and utilization, and making important contributions to green production and sustainable development.

[0034] In some embodiments, the gas collection hood 102 includes a movable skirt and a hood control system; the movable skirt is adjustable up and down along the vaporization cooling flue 103. The hood control system is configured to automatically adjust the annular gap between the movable skirt and the furnace opening of the vanadium-extracting converter 1 based on the smelting process, oxygen flow rate, and calculated gas generation, to maintain a stable pressure differential at the furnace opening of 0.25 kPa ± 0.1 kPa, thereby effectively reducing the CO combustion rate and ensuring gas quality and recovery.

[0035] In some embodiments, the evaporative cooler 106 utilizes a three-stage atomization nitrogen atomization nozzle. The first stage is gas-pressure differential atomization; the second stage is mechanical fragmentation atomization; and the third stage is expansion atomization. Specifically, in the first stage, pressurized gas and liquid enter the nozzle simultaneously. Due to the nozzle's internal design, these fluids are rapidly depressurized and intermixed. This sudden pressure change and mixing effect results in an initial atomization effect, transforming the liquid from large particles into smaller droplets. In the second stage, the liquid, after the first stage, enters the second stage atomization chamber, where it is sprayed onto the target spikes within the chamber. This mechanical collision process further breaks down the droplets, making them even smaller. This mechanical fragmentation method effectively improves atomization efficiency and prepares for the third stage. In the third stage, the gas-liquid mixture, which has undergone two stages of atomization, is rapidly sprayed and expands rapidly due to the reduced pressure. This expansion atomization not only increases the fineness of the atomized liquid but also further reduces the gas-liquid temperature through rapid evaporation, achieving the ultimate cooling effect. The evaporative cooler 106 using the three-stage atomizing nozzle of the present invention effectively alleviates the problem of dust accumulation in the evaporation tower, reduces the dust content of the coal gas, and greatly improves the quality of coal gas recovery.

[0036] Applications have proven that the vanadium-extraction converter gas recovery system based on parallel operation of gas tanks, as described in this application, achieves efficient, stable, and continuous recovery of vanadium-extraction converter gas, with significant long-term economic and social benefits. This utility model overcomes the technical barriers to vanadium-extraction converter gas recovery, filling a gap in vanadium-extraction converter gas recovery technology both domestically and internationally. It plays a leading role in vanadium-extraction converter gas recovery both domestically and internationally, and has broad prospects for industry promotion and application.

[0037] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A vanadium extraction converter gas recovery system based on gas holder parallel operation technology, characterized in that: include: A coal gas collection and primary dust removal system (2), a coal gas recovery pipeline layout system (5), a coal gas transmission and distribution storage system (3) based on parallel operation technology, and a coal gas secondary dust removal and application system (4); each vanadium extraction converter (1) is connected in series with a set of coal gas collection and primary dust removal systems (2), and each set of coal gas collection and primary dust removal systems (2) is connected in parallel, wherein 3 to 4 sets of coal gas collection and primary dust removal systems (2) form a group, and the collected and processed coal gas is collected through the coal gas recovery pipeline layout system (5) and input into the coal gas transmission and distribution storage system (3), and the coal gas transmission and distribution storage system (3) distributes the collected coal gas to the coal gas secondary dust removal and application system (4) through the coal gas recovery pipeline layout system (5).

2. The vanadium extraction converter gas recovery system according to claim 1, characterized in that: The gas transmission, distribution and storage system (3) comprises 2-3 gasholders (7), wherein multiple gas collection and primary dust removal systems (2) of each group are collected and input into one gasholder (7) via a gas recovery pipeline arrangement system (5); a pressure regulating valve (8) is arranged at the rear end of each gasholder (7); the front ends of the multiple gasholders (7) are connected in series via the gas recovery pipeline arrangement system (5), and a connecting valve (6) is arranged on the pipeline between two adjacent gasholders (7).

3. The vanadium extraction converter gas recovery system according to claim 2, characterized in that: The pressure difference between the storage pressures of every two of the gas tanks (7) is between 0.1 and 0.3 KPa.

4. The vanadium extraction converter gas recovery system according to claim 2, characterized in that: The connecting valve (6) is a bypass valve.

5. The vanadium extraction converter gas recovery system according to claim 4, characterized in that: The bypass valve is in a normally closed state; the gas transmission, distribution and storage system (3) comprises a communication valve control system; the communication valve control system is configured to use the higher pressure gas tank (7) as a main control unit, and utilizes the pressure of the higher pressure gas tank (7) to track the lower pressure gas tank (7) to adjust the opening of the bypass valve.

6. The vanadium extraction converter gas recovery system according to claim 5, characterized in that: The coal gas secondary dust removal and application system (4) comprises 2 to 4 sets of wet electrostatic precipitators (9) arranged in parallel, each set of wet electrostatic precipitators (9) being connected to the rear end of each gas cabinet (7) via a coal gas recovery pipeline arrangement system (5); the coal gas secondary dust removal and application system (4) further comprises 2 to 4 sets of coal gas compressors (10) arranged in parallel; each set of coal gas compressors (10) being connected to the gas outlet end of each wet electrostatic precipitator (9) via a coal gas recovery pipeline arrangement system (5).

7. The vanadium extraction converter gas recovery system according to claim 6, characterized in that: Each gas compressor (10) is connected to an energy application device or an energy station (11) via a gas recovery pipeline arrangement system (5).

8. The vanadium extraction converter gas recovery system according to claim 1, characterized in that: The coal gas collection and primary dust removal system (2) at least comprises a coal gas collection hood (102), a vaporization cooling flue (103), a water cooling jacket (104), a non-metallic compensator (105), an evaporative cooler (106), an evaporative cooler outlet section (107), an evaporative cooler outlet riser (108), an evaporative cooler outlet horizontal section (109), a secondary evaporative washing section (110), a collector (111), an annular seam venturi (112), an annular seam hydraulic station (113), a downcomer (114), an elbow dehydrator (115), a horizontal water mist separator (116), and a centrifugal fan (117), which are connected in sequence.

9. The vanadium extraction converter gas recovery system according to claim 8, characterized in that: The gas collecting hood (102) comprises a movable hood skirt and a hood control system; the movable hood skirt can be adjusted up and down along the vaporization cooling flue (103); the hood control system is configured to automatically adjust the size of the annular gap between the movable hood skirt and the furnace mouth of the vanadium extracting converter (1) according to the smelting process, oxygen flow rate and calculated gas generation amount, so that the furnace mouth differential pressure is stably controlled at 0.25kPa±0.1kPa.

10. The vanadium extraction converter gas recovery system according to claim 8, characterized in that: The evaporative cooler (106) adopts a three-stage atomization nitrogen atomization nozzle; the first stage atomization is gas-pressure differential atomization; the second stage atomization is mechanical crushing atomization; and the third stage atomization is expansion atomization.

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