Method for efficiently utilizing acid-containing steam

Abstract

The two links of acid-containing steam output and direct absorption and utilization are completed in the same closed space, a high-temperature solution containing acid steam and low-temperature spraying liquid used for absorbing steam are output, the two solutions are located in two different containers in the same space, the acid-containing steam leaving the surface of the high-temperature solution is directly absorbed by the low-temperature spraying liquid, and the acid-containing steam is directly absorbed by the low-temperature spraying liquid. Acid, water and heat energy in the acid-containing steam are completely transferred to the spraying liquid to obtain a mixed liquid capable of being recycled, so that the closed space for producing and absorbing the acid-containing steam is in a normal-pressure state or a certain-vacuum-degree negative-pressure state, and as long as the steam produced by the high-temperature solution can be absorbed by the low-temperature spraying liquid, the acid-containing steam can be absorbed by the low-temperature spraying liquid; therefore, the most direct and efficient recovery and utilization of heat energy are completed, and the recovery and utilization of steam can be completed while the low-temperature spraying liquid is directly used to form negative pressure through the ejector.

Description

Technical Field

[0001] The invention discloses a method for efficiently utilizing acid-containing steam, and relates to a method for efficiently utilizing acid-containing steam. Background Art

[0002] In industrial production, some acidic solutions often need to be evaporated and concentrated. Some acidic solutions also need to be deeply concentrated to meet the technical requirements. Whether it is deep concentration by vacuum evaporation or electric evaporation, the solution contains a high concentration of acid and the produced steam contains acid. The steam is acidic steam with strong acidity. The high temperature and high acidity of this type of steam can be used to recover and utilize its heat by using equipment such as plate heat exchangers. The rapid corrosion of high-temperature acidic steam to equipment is a problem that cannot be solved at present. At the same time, the produced acidic steam, such as if it is transferred and utilized through pipeline transportation, increases equipment and facilities and loses part of the heat of the acidic steam, which is not conducive to the low-cost and efficient recovery of the thermal energy of the acidic steam and the simple and operable operation of the production system. At present, the most common way to treat the produced acidic steam is to discharge it after environmental protection treatment, which causes huge energy waste and is a problem that needs to be solved under the guidance of high-quality development goals. Summary of the invention

[0003] In view of the problem that the acid-containing steam cannot be efficiently utilized, the present invention provides a method for efficiently utilizing the acid-containing steam, which is characterized by:

[0004] The two links (output and absorption) of acid-containing steam and its direct absorption and utilization are completed in the same closed space. The high-temperature solution containing acid steam and the low-temperature spray liquid used to absorb steam are produced. The two solutions are in two different containers in the same space. During the operation, the acid-containing steam leaving the surface of the high-temperature solution is directly absorbed by the low-temperature spray liquid. The acid, water and heat energy in the acid-containing steam are completely transferred to the spray liquid to obtain a mixed liquid. The mixed liquid goes to the production system, and the acid and heat energy are recovered and utilized.

[0005] A closed space is created to produce and absorb acid-containing steam. The space is at normal pressure or a certain vacuum negative pressure state. As long as the steam produced by the high-temperature solution can be absorbed by the low-temperature spray liquid, the most direct and efficient recovery and utilization of thermal energy is achieved. Alternatively, the low-temperature spray liquid can be directly used to form a negative pressure through the ejector while completing the recovery and utilization of steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Instructions attached Figure 1 This is a schematic diagram of a method for efficient utilization of acid-containing steam. The numbers in the figure represent: 1: Schematic diagram of a method for efficient utilization of acid-containing steam; 2: A closed space for steam generation and absorption; 3: Acidic steam produced by high-temperature solution; 4: Inlet of solution producing steam; 5: High temperature solution; 6: Outlet of high temperature solution; 7: A device placed in the high-temperature solution area to provide heat energy for evaporation; 8: Insulation material filled between containers; 9: Low-temperature circulating spray liquid outlet; 10: low temperature circulating spray liquid; 11: low temperature solution in spraying state; 12: Low temperature spray liquid inlet; 13: Interface for connecting the vacuum device; 14: Manufacture a spray plate in a spraying state. DETAILED DESCRIPTION

[0007] Copper electrolyte purification and nickel ion separation process: evaporation and concentration to produce nickel sulfate crystals Solution composition before evaporation: sulfuric acid concentration: 350-450 g / L; nickel ion concentration: 25-35 g / L; High temperature solution state: High temperature solution temperature: 170-180°C; sulfuric acid concentration: ≥900g / L; nickel ion concentration: 2-3g / L; Low temperature circulating spray liquid: copper electrolyte, temperature 55~60℃; Solution inlet speed before evaporation: 1.2m 3 / h; High temperature solution discharge speed: 0.4 m 3 / h; Provide thermal energy device power: 1000kWh; The rate of acid-containing steam generated during the evaporation process is about: 0.8t / h; Low temperature spray liquid flow speed: 60 m 3 / h; Low-temperature spray liquid discharge speed: keep the liquid level basically unchanged; To maintain the stable operation of this acid-containing steam efficient utilization system, the low-temperature spray liquid, that is, the electrolyte temperature increases by an average of 3 to 5°C.

Claims

1. The two links (output and absorption) of acid-containing steam and its direct absorption and utilization are completed in the same closed space. The high-temperature solution containing acid steam and the low-temperature spray liquid used to absorb steam are produced. The two solutions are in two different containers in the same space. During the operation, the acid-containing steam leaving the surface of the high-temperature solution is directly absorbed by the low-temperature spray liquid. The acid, water and heat energy in the acid-containing steam are completely transferred to the spray liquid to obtain a mixed liquid. The mixed liquid goes to the production system, and the acid and heat energy are recovered and utilized.

2. A closed space is created to produce and absorb acid-containing steam. The space is at normal pressure or a certain vacuum negative pressure. As long as the steam produced by the high-temperature solution can be absorbed by the low-temperature spray liquid, the most direct and efficient recovery and utilization of heat energy can be achieved. Alternatively, the low-temperature spray liquid can be directly used to form a negative pressure through the ejector while completing the recovery and utilization of steam.

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