Oxygen-enriched acid making system combined with HRS technology

Abstract

The utility model belongs to the technical field of smelting gas recovery acid making, and particularly relates to an oxygen-enriched acid making system combined with an HRS technology. The system comprises a purification unit, an electric demisting unit, a dry absorption unit, a conversion unit and an HRS unit, the purification unit comprises a first-stage efficient washer, an inclined plate settling tank, a chamber type filter press, a supernate storage tank, a high-level water tank, a degassing tower, a waste acid storage tank, a gas cooling tower, a plate heat exchanger and a second-stage efficient washer; the electric demisting unit comprises a first-stage electric demister I, a first-stage electric demister II, a second-stage electric demister I, a second-stage electric demister II and an electric demisting main pipe; and the dry absorption unit comprises a drying tower, a drying circulating tank, a secondary absorption tower and a secondary absorption circulating tank. The device can solve the problems of low dilute acid acidity of a flue gas purification system and high load and difficulty in treatment of a waste acid treatment system in the existing smelting industry to a certain extent, and is suitable for an acid making system with low dilute acid purification acidity, high waste acid treatment capacity and non-recycled dry smoke heat.

Description

Technical Field

[0001] This utility model belongs to the field of smelting gas recovery and acid production technology, specifically relating to an oxygen-enriched acid production system combined with HRS technology. Background Technology

[0002] Currently, the sulfur content in the process gas of copper smelting can reach 35%-40%. To maintain the normal operation of the conversion system, it is necessary to increase the air supply to the process gas entering the sulfuric acid system to dilute the high concentration of sulfur dioxide to about 12%. Simply increasing the oxygen concentration will increase the flue gas volume and reduce the conversion rate, which will lead to a decrease in the steam production of subsequent waste heat recovery devices, making it difficult to meet the tail gas data standards, and also increasing subsequent equipment maintenance and production costs.

[0003] Based on this, this utility model designs an oxygen-enriched acid production system that combines HRS (low-temperature waste heat recovery) technology. By setting an air inlet pipe and an oxygen inlet pipe on the main electrostatic precipitator in the electrostatic precipitator section, and setting an air supply valve I and an oxygen supply valve II, the amount of air and oxygen entering the flue gas entering the dry absorption section and the conversion section can be regulated. This can avoid the sulfur dioxide fan operating frequency being too high, reduce the flue gas flow, and ensure that the sulfur dioxide and oxygen concentrations before entering the next section meet the standards. At the same time, by setting a primary conversion section and a secondary conversion section in the conversion tower, the conversion degree of sulfur dioxide in the flue gas is improved, which is beneficial to the post-treatment of exhaust gas. Utility Model Content

[0004] Based on the technical problems existing in the prior art, this utility model proposes an oxygen-enriched acid production system combined with HRS technology. This utility model can solve the problems in the prior art where, when the air supply in the conversion section is reduced and the total flue gas flow rate is reduced, the concentration of sulfur dioxide in the flue gas becomes too high, the oxygen concentration decreases, the flue gas conversion rate decreases, the steam production is low, and the tail gas data is difficult to meet the standards.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An oxygen-enriched acid generation system incorporating HRS technology includes a purification unit, an electrostatic precipitator, a dry suction unit, a conversion unit, and an HRS unit.

[0007] The purification unit includes a primary high-efficiency scrubber, an inclined plate settling tank, a chamber filter press, a supernatant storage tank, an elevated water tank, a degassing tower, a waste acid storage tank, a gas cooling tower, a plate heat exchanger, and a secondary high-efficiency scrubber.

[0008] The electrostatic precipitator unit includes a primary electrostatic precipitator I, a primary electrostatic precipitator II, a secondary electrostatic precipitator I, a secondary electrostatic precipitator II, and an electrostatic precipitator main pipe;

[0009] The dry absorption unit includes a drying tower, a drying circulation tank, a drying anode protection acid cooler, a secondary absorption tower, a secondary absorption circulation tank, a secondary absorption anode protection acid cooler, a finished product anode protection acid cooler, and a finished product acid underground tank.

[0010] The conversion unit includes a conversion tower, a primary heat exchanger, and a secondary heat exchanger;

[0011] The HRS unit includes a high-temperature absorption tower, a high-temperature circulating tank, a steam generator, a mixer, an evaporator feedwater heater, an evaporative deaerator, a demineralized water heater, and a steam jet tower.

[0012] The secondary high-efficiency scrubber in the purification unit is connected to the primary electro-demistor I and primary electro-demistor II in the electro-demistor unit, respectively. The electro-demistor main pipe in the electro-demistor unit is connected to the drying tower in the dry absorption unit. The drying tower in the dry absorption unit is connected to the secondary heat exchanger in the conversion unit. The high-temperature absorption tower of the HRS unit is connected to the primary heat exchanger in the conversion unit.

[0013] Furthermore, the side wall of the first-stage high-efficiency washer is provided with a first air inlet pipe; the bottom of the first-stage high-efficiency washer is connected to the first air inlet pipe through a first return pipe, and a first discharge pipe is also connected to the first return pipe, which is connected to the input end of the inclined plate settling tank.

[0014] The inclined plate settling tank has two output ends: a first output end at the bottom and a second output end at the top. The first output end at the bottom of the inclined plate settling tank is connected to the input end of the chamber filter press through a second discharge pipe; the second output end at the top of the inclined plate settling tank is connected to the input end of the supernatant storage tank through a pipeline.

[0015] The chamber filter press has two output ends, namely the third output end at the top and the fourth output end at the bottom. The third output end at the top of the chamber filter press is connected to the input end of the supernatant storage tank through a pipeline.

[0016] The supernatant storage tank has two output ends, namely the fifth output end at the bottom and the sixth output end at the top. The fifth output end at the bottom of the supernatant storage tank is connected to the input end of the degassing tower through the third discharge pipe, and the sixth output end at the top of the supernatant storage tank is connected to the first-stage high-efficiency scrubber through a pipeline.

[0017] The third discharge pipe is also equipped with a first bypass pipe, which is connected to the input end of the high-level water tank.

[0018] The elevated water tank has two output terminals, namely the seventh output terminal and the eighth output terminal.

[0019] Furthermore, the bottom of the degassing tower is connected to the input end of the waste acid storage tank via a pipeline, and the output end of the waste acid storage tank is discharged externally through the first external discharge pipe; the gas cooling tower is also equipped with a first spray pipe;

[0020] The middle section of the secondary high-efficiency scrubber is connected to the middle section of the gas cooling tower via a pipeline, and the middle section of the gas cooling tower is connected to the middle section of the primary high-efficiency scrubber via a pipeline.

[0021] The secondary high-efficiency washer also has a second air intake pipe on its side wall;

[0022] The exhaust end at the top of the first-stage high-efficiency scrubber is also connected to the gas cooling tower through the first exhaust pipe; the exhaust end at the top of the gas cooling tower is also connected to the inlet end of the second air inlet pipe through the second exhaust pipe.

[0023] Furthermore, the plate heat exchanger includes tube-side piping and shell-side piping;

[0024] The bottom of the gas cooling tower is connected to the inlet end of the tube-side pipe of the plate heat exchanger through the first heat exchange pipe, and the outlet end of the tube-side pipe of the plate heat exchanger is discharged externally through the pipe.

[0025] The inlet end of the first spray pipe extends out of the side wall of the gas cooling tower, and the outlet end of the shell-side pipe of the plate heat exchanger is connected to the inlet end of the first spray pipe through the second heat exchange pipe.

[0026] Furthermore, the seventh output end of the high-level water tank is connected to the first air inlet pipe of the first-stage high-efficiency scrubber via a pipeline, and the eighth output end of the high-level water tank is connected to the first-stage high-efficiency scrubber via a pipeline.

[0027] Furthermore, the exhaust end at the top of the secondary high-efficiency scrubber is also connected to a third exhaust pipe. The third exhaust pipe has two branches, namely the first branch and the second branch. The first branch is connected to the input end of the primary electrostatic precipitator I, and the second branch is connected to the input end of the primary electrostatic precipitator II. The output end of the primary electrostatic precipitator I is connected to the input end of the secondary electrostatic precipitator I through a pipe, and the output end of the primary electrostatic precipitator II is connected to the input end of the secondary electrostatic precipitator II through a pipe. The output ends of the secondary electrostatic precipitator I and the secondary electrostatic precipitator II are both connected to the input end of the electrostatic precipitator main pipe through pipes.

[0028] External air is connected to the main electrostatic precipitator through an air inlet pipe, and external oxygen is connected to the main electrostatic precipitator through an oxygen inlet pipe.

[0029] Furthermore, the output end of the electrostatic precipitator is connected to the lower part of the drying tower, the output end of the bottom of the drying tower is connected to the input end of the drying circulation tank through the fourth discharge pipe, and the output end of the drying circulation tank is connected to the input end of the drying anode protection acid cooler through the fifth discharge pipe.

[0030] Both primary and secondary heat exchangers include tube-side piping and shell-side piping.

[0031] The drying tower is also equipped with a second spray pipe. The input end of the second spray pipe extends out of the side wall of the drying tower. The output end of the drying anode protection acid cooler is connected to the input end of the second spray pipe through a pipeline. The exhaust end at the top of the drying tower is also connected to the input end of the shell-side pipeline of the secondary heat exchanger through a fourth exhaust pipe.

[0032] Furthermore, the fifth discharge pipe is also equipped with a second bypass pipe and a third bypass pipe, with the second bypass pipe connected to the input end of the mixer.

[0033] Furthermore, the conversion tower is divided into an upper gas chamber and a lower gas chamber by a partition;

[0034] The output end of the shell-side piping of the secondary heat exchanger is connected to the input end at the top of the upper gas chamber of the conversion tower via a pipeline.

[0035] The conversion tower has two output ends, namely the ninth output end located in the upper gas chamber and the tenth output end located in the lower gas chamber. The ninth output end is connected to the input end of the tube-side pipeline of the secondary heat exchanger through the sixth discharge pipe.

[0036] The tenth output end is connected to the input end of the tube-side pipeline of the primary heat exchanger through the seventh discharge pipe;

[0037] The output end of the tube-side piping of the secondary heat exchanger is connected to the input end of the steam jet tower via a pipeline, and the output end of the steam jet tower is connected to the lower part of the high-temperature absorption tower via a pipeline.

[0038] The output end of the shell-side pipeline of the primary heat exchanger is connected to the lower gas chamber of the conversion tower through the eighth discharge pipe, and the output end of the tube-side pipeline of the primary heat exchanger is connected to the lower part of the secondary absorption tower through a pipeline.

[0039] Furthermore, the upper gas chamber of the conversion tower is equipped with a primary conversion section, and the lower gas chamber of the conversion tower is equipped with a secondary conversion section; both the primary and secondary conversion sections are equipped with vanadium pentoxide catalyst layers.

[0040] Furthermore, the output end at the bottom of the second suction tower is connected to the input end of the second suction circulation tank through the ninth discharge pipe;

[0041] The top of the second suction tower is equipped with an exhaust end, through which the exhaust gas inside the second suction tower is discharged.

[0042] The output end of the double-suction circulation tank is connected to the input end of the double-suction anode protection acid cooler through a pipeline.

[0043] The output end of the double-absorption anode protection acid cooler has three branches, namely the third branch, the fourth branch and the fifth branch. The third branch is connected to the input end of the finished anode protection acid cooler, and the output end of the finished anode protection acid cooler is connected to the input end of the finished acid underground tank through a pipeline.

[0044] The second suction tower is also equipped with a third spray pipe. The input end of the third spray pipe extends out of the side wall of the second suction tower, and the fourth branch is connected to the input end of the third spray pipe.

[0045] The high-temperature absorption tower is equipped with a fourth spray pipe and a fifth spray pipe. The input ends of the fourth spray pipe and the fifth spray pipe both extend out of the high-temperature absorption tower, and the fifth branch is connected to the input end of the fourth spray pipe.

[0046] Steam generators, evaporator feedwater heaters, evaporative deaerators, and demineralized water heaters all include tube-side piping and shell-side piping.

[0047] The bottom of the high-temperature absorption tower is connected to the input end of the high-temperature circulation tank via a pipeline, and the output end of the high-temperature circulation tank is connected to the input end of the tube side pipeline of the steam generator via a pipeline.

[0048] The exhaust end at the top of the high-temperature absorption tower is also connected to the input end of the shell-side pipeline of the primary heat exchanger through the fifth exhaust pipe.

[0049] The output end of the tube side of the steam generator is connected to the input end of the mixer through the tenth discharge pipe;

[0050] The output of the mixer is connected to the input of the fifth spray pipe via a pipeline.

[0051] Furthermore, the tenth discharge pipe is also equipped with a fourth bypass pipe, which is connected to the input end of the tube-side pipe of the evaporator feed water heater, and the output end of the tube-side pipe of the evaporator feed water heater is connected to the input end of the tube-side pipe of the evaporator deaerator through a pipe.

[0052] Furthermore, the output end of the tube-side pipeline of the evaporative deaerator is connected to the input end of the tube-side pipeline of the demineralized water heater via a pipeline; the output end of the tube-side pipeline of the demineralized water heater is provided with two branches, namely the sixth branch and the seventh branch. The sixth branch is connected to the side wall of the ninth discharge pipe, and the seventh branch is connected to the side wall of the fourth discharge pipe.

[0053] Furthermore, the external demineralized water is connected to the input end of the shell-side pipeline of the demineralized water heater through a demineralized water inlet pipe. A demineralized water pump is installed on the demineralized water inlet pipe. The output end of the shell-side pipeline of the demineralized water heater is connected to the input end of the shell-side pipeline of the evaporative deaerator through a pipeline.

[0054] Furthermore, the shell-side piping of the evaporative deaerator is equipped with two output ends, namely the eleventh output end at the top and the twelfth output end at the bottom. The eleventh output end is connected to the input end of the steam jet tower through a pipeline.

[0055] Furthermore, the twelfth output terminal has two branches, namely the eighth branch and the ninth branch. The eighth branch is connected to the input end of the shell-side pipe of the evaporator feedwater heater, and the output end of the shell-side pipe of the evaporator feedwater heater is connected to the input end of the shell-side pipe of the steam generator through a pipe. An evaporator feedwater pump is installed on the eighth branch.

[0056] Furthermore, the external process gas (smelting flue gas) is connected to the inlet end of the first inlet pipe through a pipeline.

[0057] Furthermore, a primary power wave pump is installed on the first return pipe.

[0058] Furthermore, a filter press pump is installed on the second discharge pipe.

[0059] Furthermore, the fourth output end at the bottom of the chamber filter press is the waste residue discharge end.

[0060] Furthermore, an overflow weir circulation pump is installed at the connection between the third discharge pipe and the supernatant storage tank; external air is connected to the degassing tower through pipelines.

[0061] Furthermore, a waste acid discharge pump is installed on the first discharge pipe.

[0062] Furthermore, external production water is connected to an elevated water tank via pipelines.

[0063] Furthermore, the bottom of the secondary high-efficiency washer is connected to the second air inlet pipe via a second return pipe, and a secondary power wave pump is installed on the second return pipe.

[0064] Furthermore, a gas cooling tower circulation pump is installed on the first heat exchange pipeline.

[0065] Furthermore, the external cooling water is connected to the inlet end of the shell-side pipes of the plate heat exchanger via a pipeline.

[0066] Furthermore, the air inlet pipe is equipped with an air supply valve I, and the oxygen inlet pipe is equipped with an oxygen supply valve II.

[0067] Furthermore, a drying circulation acid pump is installed at the connection between the fifth discharge pipe and the drying circulation tank.

[0068] Furthermore, a sulfur dioxide fan is installed on the fourth exhaust pipe.

[0069] Furthermore, the ninth output is located below the first conversion stage.

[0070] Furthermore, the tenth output is located below the secondary conversion section.

[0071] Furthermore, the connection between the eighth discharge pipe and the conversion tower is located above the secondary conversion section.

[0072] Furthermore, the third bypass pipe is connected to the side wall of the ninth discharge pipe.

[0073] Furthermore, a second-suction circulating acid pump is also installed on the pipeline at the output end of the second-suction circulating tank.

[0074] Furthermore, the output end of the finished acid underground tank is discharged through a second external discharge pipe, and a finished acid transfer pump is installed at the connection between the second external discharge pipe and the finished acid underground tank.

[0075] Furthermore, the fourth and fifth spray pipes are installed sequentially from top to bottom inside the high-temperature absorption tower.

[0076] Furthermore, a high-temperature circulation pump is also installed on the pipeline at the output end of the high-temperature circulation tank.

[0077] Furthermore, the output end of the shell-side piping of the steam generator is also connected to a steam exhaust pipe, which can discharge the generated steam.

[0078] Furthermore, the ninth branch is connected to the input of the mixer, and a jet pump is installed on the ninth branch.

[0079] Furthermore, the external compressed air is also connected to the ninth branch line through a pipeline.

[0080] Compared with the prior art, the beneficial effects of this utility model are:

[0081] The oxygen-enriched acid production system combined with HRS technology described in this invention can, to a certain extent, solve the problems in the existing smelting industry where the dilute acid concentration in flue gas purification systems is low, and the waste acid treatment system has a high load and is difficult to handle. It is suitable for acid production systems that require purifying dilute acid with low acid concentration, handle large volumes of waste acid, and do not recover heat from the dry flue gas. This invention can achieve the goal of purifying and concentrating dilute acid, reducing the amount of waste acid treated, and simultaneously realizing the recovery and utilization of heat from the dry flue gas outlet.

[0082] This invention solves the problems of insufficient oxygen concentration, low conversion rate, low steam output, and difficulty in controlling exhaust gas chimney data under high sulfur dioxide concentration conditions, thus comprehensively improving production efficiency. Attached Figure Description

[0083] Figure 1 This is a schematic diagram of the oxygen-enriched acid production system combined with HRS technology described in Example 1. Detailed Implementation

[0084] To facilitate understanding of this utility model, the following description will be provided in more comprehensive and detailed form with reference to the accompanying drawings and preferred embodiments. However, the scope of protection of this utility model is not limited to the following specific embodiments.

[0085] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0086] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0087] Example 1

[0088] like Figure 1 As shown, an oxygen-enriched acid generation system incorporating HRS technology includes a purification unit, an electrostatic precipitator, a dry suction unit, a conversion unit, and an HRS unit.

[0089] The purification unit includes a primary high-efficiency scrubber (1-1), an inclined plate settling tank (1-3), a chamber filter press (1-5), a supernatant storage tank (1-6), an elevated water tank (1-8), a degassing tower (1-9), a waste acid storage tank (1-10), a gas cooling tower (1-12), a plate heat exchanger (1-14), and a secondary high-efficiency scrubber (1-15).

[0090] The electrostatic precipitator unit includes a primary electrostatic precipitator I (2-1), a primary electrostatic precipitator II (2-2), a secondary electrostatic precipitator I (2-3), a secondary electrostatic precipitator II (2-4), and an electrostatic precipitator main pipe (not shown in the figure);

[0091] The upper side wall of the first-stage high-efficiency scrubber (1-1) is provided with a first air inlet pipe, and the external process gas (smelting flue gas) is connected to the inlet end of the first air inlet pipe through a pipeline; the bottom of the first-stage high-efficiency scrubber (1-1) is connected to the first air inlet pipe through a first return pipe; a first-stage power wave pump (1-2) is provided on the first return pipe, and during operation, the dilute acid in the first-stage high-efficiency scrubber (1-1) is sprayed into the first air inlet pipe through the first return pipe to wash the flue gas and preliminarily cool it down; a first discharge pipe is also connected to the first return pipe, and the first discharge pipe is connected to the input end of the inclined plate settling tank (1-3);

[0092] The inclined plate settling tank (1-3) has two output ends, namely the first output end at the bottom and the second output end at the top. The first output end at the bottom of the inclined plate settling tank (1-3) is connected to the input end of the chamber filter press (1-5) through the second discharge pipe. The second discharge pipe is equipped with a filter pump (1-4).

[0093] The second output end of the inclined plate settling tank (1-3) is connected to the input end of the supernatant storage tank (1-6) through a pipeline; the chamber filter press (1-5) has two output ends, namely the third output end at the top and the fourth output end at the bottom. The third output end of the chamber filter press (1-5) is connected to the input end of the supernatant storage tank (1-6) through a pipeline.

[0094] The fourth output end at the bottom of the chamber filter press (1-5) is the waste residue discharge end;

[0095] The supernatant storage tank (1-6) has two output ends, namely the fifth output end at the bottom and the sixth output end at the top. The fifth output end at the bottom of the supernatant storage tank (1-6) is connected to the input end of the degassing tower (1-9) through the third discharge pipe. An overflow weir circulation pump (1-7) is provided at the connection between the third discharge pipe and the supernatant storage tank (1-6). External air is connected to the degassing tower (1-9) through a pipeline.

[0096] The sixth output end at the top of the supernatant storage tank (1-6) is connected to the first-stage high-efficiency scrubber (1-1) through a pipeline;

[0097] The bottom of the degassing tower (1-9) is connected to the input end of the waste acid storage tank (1-10) through a pipeline. The output end of the waste acid storage tank (1-10) is discharged through the first discharge pipe, and the first discharge pipe is equipped with a waste acid discharge pump (1-11).

[0098] The third discharge pipe is also equipped with a first bypass pipe, which is connected to the input end of the high-level water tank (1-8). External production water is connected to the high-level water tank (1-8) through the pipeline.

[0099] The high-level water tank (1-8) has two output ends, namely the seventh output end and the eighth output end. The seventh output end of the high-level water tank (1-8) is connected to the first air inlet pipe of the first-stage high-efficiency scrubber (1-1) through a pipeline, and the eighth output end of the high-level water tank (1-8) is connected to the first-stage high-efficiency scrubber (1-1) through a pipeline.

[0100] The upper side wall of the secondary high-efficiency washer (1-15) is also provided with a second air inlet pipe. The bottom of the secondary high-efficiency washer (1-15) is connected to the second air inlet pipe through a second return pipe. A secondary power wave pump (1-16) is provided on the second return pipe.

[0101] The plate heat exchanger (1-14) includes tube-side piping and shell-side piping; the shell-side piping and tube-side piping structure of the plate heat exchanger (1-14) in this utility model adopts the conventional setting in the prior art, and is not the inventive point of this utility model, so it will not be described in detail.

[0102] The bottom of the gas cooling tower (1-12) is connected to the input end of the tube-side pipeline of the plate heat exchanger (1-14) through the first heat exchange pipeline. The first heat exchange pipeline is equipped with a gas cooling tower circulation pump (1-13), and the output end of the tube-side pipeline of the plate heat exchanger (1-14) is discharged externally through the pipeline.

[0103] The external cooling water is connected to the inlet end of the shell-side pipe of the plate heat exchanger (1-14) through a pipeline;

[0104] The upper part of the gas cooling tower (1-12) is also provided with a first spray pipe. The input end of the first spray pipe extends out of the side wall of the gas cooling tower (1-12). The output end of the shell-side pipe of the plate heat exchanger (1-14) is connected to the input end of the first spray pipe through the second heat exchange pipe.

[0105] The middle part of the secondary high-efficiency scrubber (1-15) is connected to the middle part of the gas cooling tower (1-12) through a pipeline, and the middle part of the gas cooling tower (1-12) is connected to the middle part of the primary high-efficiency scrubber (1-1) through a pipeline.

[0106] The exhaust end at the top of the first-stage high-efficiency scrubber (1-1) is also connected to the gas cooling tower (1-12) through the first exhaust pipe; the exhaust end at the top of the gas cooling tower (1-12) is also connected to the inlet end of the second air inlet pipe through the second exhaust pipe.

[0107] The exhaust end at the top of the secondary high-efficiency scrubber (1-15) is also connected to a third exhaust pipe. The third exhaust pipe has two branches, namely the first branch and the second branch. The first branch is connected to the input end of the primary electrostatic precipitator I (2-1), and the second branch is connected to the input end of the primary electrostatic precipitator II (2-2). The output end of the primary electrostatic precipitator I (2-1) is connected to the input end of the secondary electrostatic precipitator I (2-3) through a pipe. The output end of the primary electrostatic precipitator II (2-2) is connected to the input end of the secondary electrostatic precipitator II (2-4) through a pipe. The output ends of the secondary electrostatic precipitators I (2-3) and II (2-4) are both connected to the input end of the electrostatic precipitator main pipe through pipes.

[0108] External air is connected to the main electrostatic precipitator through an air inlet pipe, and external oxygen is connected to the main electrostatic precipitator through an oxygen inlet pipe. The air inlet pipe is equipped with an air supply valve I (2-5), and the oxygen inlet pipe is equipped with an oxygen supply valve II (2-6). The external oxygen is pure oxygen or high-concentration oxygen-enriched oxygen.

[0109] The dry adsorption unit includes a drying tower (3-1), a drying circulation tank (3-2), a drying anode protection acid cooler (3-4), a secondary adsorption tower (3-5), a secondary adsorption circulation tank (3-6), a secondary adsorption anode protection acid cooler (3-8), a finished product anode protection acid cooler (3-9), and a finished product acid underground tank (3-10).

[0110] The conversion unit includes a conversion tower (4-1), a primary heat exchanger (4-3), and a secondary heat exchanger (4-5).

[0111] The HRS unit includes a high-temperature absorption tower (5-1), a high-temperature circulation tank (5-2), a steam generator (5-4), a mixer (5-5), an evaporator feedwater heater (5-6), an evaporator deaerator (5-7), a demineralized water heater (5-10), and a steam jet tower (5-12).

[0112] The output end of the electrostatic precipitator is connected to the lower part of the drying tower (3-1). The output end of the bottom of the drying tower (3-1) is connected to the input end of the drying circulation tank (3-2) through the fourth discharge pipe. The output end of the drying circulation tank (3-2) is connected to the input end of the drying anode protection acid cooler (3-4) through the fifth discharge pipe. A drying circulation acid pump (3-3) is provided at the connection between the fifth discharge pipe and the drying circulation tank (3-2).

[0113] The fifth discharge pipe is also equipped with a second bypass pipe and a third bypass pipe. The second bypass pipe is connected to the input end of the mixer (5-5).

[0114] Both the primary heat exchanger (4-3) and the secondary heat exchanger (4-5) include tube-side piping and shell-side piping. The shell-side piping and tube-side piping structures of the primary heat exchanger (4-3) and the secondary heat exchanger (4-5) in this utility model adopt conventional settings in the prior art and are not the inventive point of this utility model, so they will not be described in detail.

[0115] The drying tower (3-1) is also equipped with a second spray pipe. The input end of the second spray pipe extends out of the side wall of the drying tower (3-1). The output end of the drying anode protection acid cooler (3-4) is connected to the input end of the second spray pipe through a pipeline. The exhaust end of the top of the drying tower (3-1) is also connected to the input end of the shell-side pipeline of the secondary heat exchanger (4-5) through a fourth exhaust pipe. A sulfur dioxide fan (3-12) is installed on the fourth exhaust pipe.

[0116] The conversion tower (4-1) is divided into an upper gas chamber and a lower gas chamber by a partition. The upper gas chamber of the conversion tower (4-1) is equipped with a primary conversion section (4-2), and the lower gas chamber of the conversion tower (4-1) is equipped with a secondary conversion section (4-4). Both the primary conversion section (4-2) and the secondary conversion section (4-4) are equipped with vanadium pentoxide catalyst layers.

[0117] The output end of the shell-side pipe of the secondary heat exchanger (4-5) is connected to the input end of the top of the upper gas chamber of the conversion tower (4-1) through a pipe.

[0118] The conversion tower (4-1) has two output ends, namely the ninth output end located in the upper gas chamber and the tenth output end located in the lower gas chamber. The ninth output end is connected to the input end of the tube side pipeline of the secondary heat exchanger (4-5) through the sixth discharge pipe. The ninth output end is located below the primary conversion section (4-2).

[0119] The tenth output end is connected to the input end of the tube-side pipeline of the primary heat exchanger (4-3) through the seventh discharge pipe; the tenth output end is located below the secondary conversion section (4-4);

[0120] The output end of the tube side of the secondary heat exchanger (4-5) is connected to the input end of the steam jet tower (5-12) through a pipeline, and the output end of the steam jet tower (5-12) is connected to the lower part of the high temperature absorption tower (5-1) through a pipeline.

[0121] The output end of the shell-side pipeline of the primary heat exchanger (4-3) is connected to the lower gas chamber of the conversion tower (4-1) through the eighth discharge pipe, and the output end of the tube-side pipeline of the primary heat exchanger (4-3) is connected to the lower part of the secondary absorption tower (3-5) through a pipeline; the connection between the eighth discharge pipe and the conversion tower (4-1) is located above the secondary conversion section (4-4);

[0122] The output end of the bottom of the second suction tower (3-5) is connected to the input end of the second suction circulation tank (3-6) through the ninth discharge pipe, and the third bypass pipe is connected to the side wall of the ninth discharge pipe.

[0123] The top of the second suction tower (3-5) is equipped with an exhaust end, and the exhaust gas inside the second suction tower (3-5) is discharged through the exhaust end of the second suction tower (3-5).

[0124] The output end of the double-suction circulation tank (3-6) is connected to the input end of the double-suction anode protection acid cooler (3-8) through a pipeline. The double-suction circulation tank (3-6) is also equipped with a double-suction circulation acid pump (3-7) on the pipeline at the output end of the double-suction circulation tank (3-6).

[0125] The output end of the double-suction anode protection acid cooler (3-8) is provided with three branches, namely the third branch, the fourth branch and the fifth branch. The third branch is connected to the input end of the finished anode protection acid cooler (3-9). The output end of the finished anode protection acid cooler (3-9) is connected to the input end of the finished acid underground tank (3-10) through a pipeline. The output end of the finished acid underground tank (3-10) is discharged through the second external discharge pipe. The finished acid transfer pump (3-11) is provided at the connection between the second external discharge pipe and the finished acid underground tank (3-10).

[0126] The second suction tower (3-5) is also equipped with a third spray pipe. The input end of the third spray pipe extends out of the side wall of the second suction tower (3-5), and the fourth branch is connected to the input end of the third spray pipe.

[0127] The high-temperature absorption tower (5-1) is equipped with a fourth spray pipe and a fifth spray pipe. The fourth spray pipe and the fifth spray pipe are arranged sequentially from top to bottom in the high-temperature absorption tower (5-1). The input ends of the fourth spray pipe and the fifth spray pipe both extend out of the high-temperature absorption tower (5-1). The fifth branch is connected to the input end of the fourth spray pipe.

[0128] The steam generator (5-4), evaporator feedwater heater (5-6), evaporator deaerator (5-7), and demineralized water heater (5-10) all include tube-side piping and shell-side piping. The shell-side piping and tube-side piping structures of the steam generator (5-4), evaporator feedwater heater (5-6), evaporator deaerator (5-7), and demineralized water heater (5-10) in this utility model adopt conventional settings in the prior art and are not the inventive point of this utility model, so they will not be described in detail.

[0129] The bottom of the high temperature absorption tower (5-1) is connected to the input end of the high temperature circulation tank (5-2) through a pipeline. The output end of the high temperature circulation tank (5-2) is connected to the input end of the tube side pipeline of the steam generator (5-4) through a pipeline. A high temperature circulation pump (5-3) is also installed on the pipeline at the output end of the high temperature circulation tank (5-2).

[0130] The exhaust end at the top of the high temperature absorption tower (5-1) is also connected to the input end of the shell-side pipeline of the primary heat exchanger (4-3) through the fifth exhaust pipe;

[0131] The output end of the tube side of the steam generator (5-4) is connected to the input end of the mixer (5-5) through the tenth discharge pipe;

[0132] The tenth discharge pipe is also equipped with a fourth bypass pipe, which is connected to the input end of the tube-side pipeline of the evaporator feed water heater (5-6). The output end of the tube-side pipeline of the evaporator feed water heater (5-6) is connected to the input end of the tube-side pipeline of the evaporator deaerator (5-7) through a pipeline.

[0133] The output end of the tube-side pipeline of the evaporative deaerator (5-7) is connected to the input end of the tube-side pipeline of the demineralized water heater (5-10) through a pipeline; the output end of the tube-side pipeline of the demineralized water heater (5-10) is provided with two branches, namely the sixth branch and the seventh branch. The sixth branch is connected to the side wall of the ninth discharge pipe, and the seventh branch is connected to the side wall of the fourth discharge pipe.

[0134] The shell-side piping of the evaporative deaerator (5-7) has two output ends, namely the eleventh output end at the top and the twelfth output end at the bottom. The eleventh output end is connected to the input end of the steam jet tower (5-12) through a pipeline.

[0135] The external demineralized water is connected to the input end of the shell-side pipeline of the demineralized water heater (5-10) through the demineralized water inlet pipe. The demineralized water inlet pipe is equipped with a demineralized water pump (5-11). The output end of the shell-side pipeline of the demineralized water heater (5-10) is connected to the input end of the shell-side pipeline of the evaporative deaerator (5-7) through a pipeline.

[0136] The twelfth output terminal has two branches, namely the eighth branch and the ninth branch. The eighth branch is connected to the input end of the shell-side pipe of the evaporator feedwater heater (5-6). The output end of the shell-side pipe of the evaporator feedwater heater (5-6) is connected to the input end of the shell-side pipe of the steam generator (5-4) through a pipe. The eighth branch is equipped with an evaporator feedwater pump (5-8).

[0137] The output end of the shell-side piping of the steam generator (5-4) is also connected to a steam exhaust pipe, which can exhaust the generated steam.

[0138] The ninth branch is connected to the input of the mixer (5-5), and a jet water pump (5-9) is installed on the ninth branch; in addition, external compressed air is also connected to the ninth branch through a pipeline; the output of the mixer (5-5) is connected to the input of the fifth spray pipe through a pipeline.

[0139] The process flue gas passes through a primary high-efficiency scrubber (1-1), a gas cooling tower (1-12), a secondary high-efficiency scrubber (1-15), a primary electrostatic precipitator I (2-1), a primary electrostatic precipitator II (2-2), a secondary electrostatic precipitator I (2-3), a secondary electrostatic precipitator II (2-4), a drying tower (3-1), a high-temperature absorption tower (5-1), and a secondary absorption tower (3-5) before being sent to the subsequent tail gas desulfurization process.

[0140] The first-stage electrostatic precipitator I (2-1), the first-stage electrostatic precipitator II (2-2), the second-stage electrostatic precipitator I (2-3), and the second-stage electrostatic precipitator II (2-4) are equipped with flushing valves and can be connected to the circulating water pipeline. A drain valve is provided at the bottom.

[0141] The operating mode of this utility model is as follows:

[0142] 1. Purification Section: When the smelting process gas (the main components of the flue gas are: SO2 20%, SO3 0.1%, O2 7%, N2 46%, H2O 21.9%, CO2 5%) enters the purification section, it first enters the first-stage high-efficiency scrubber (1-1) through the first inlet pipe. After passing through the first-stage high-efficiency scrubber (1-1), SO3 impurities in the flue gas are removed, and the flue gas temperature is reduced from 270℃ to 70℃. Then, from the exhaust end at the top of the first-stage high-efficiency scrubber (1-1), it enters the gas cooling tower (1-12) through the first exhaust pipe. The gas cooling tower (1-12) further reduces the flue gas temperature to 40℃. Then, from the exhaust end at the top of the gas cooling tower (1-12), it enters the second-stage high-efficiency scrubber (1-15) through the second exhaust pipe, further removing SO3 impurities in the flue gas and reducing the flue gas temperature to 30℃ before entering the next section.

[0143] Meanwhile, the system waste liquid formed by the first-stage high-efficiency scrubber (1-1) passes through the inclined plate settling tank (1-3) and the chamber filter press (1-5) in sequence, and is discharged from the fourth output end at the bottom of the chamber filter press (1-5). The circulating liquid in the gas cooling tower (1-12) is cooled by the plate heat exchanger (1-14) to reduce the temperature of the circulating liquid to the same or similar to the temperature of the flue gas.

[0144] 2. Electrostatic precipitator section: The purified flue gas enters the first-stage electrostatic precipitator I (2-1) and the first-stage electrostatic precipitator II (2-2) from the exhaust end of the top of the second-stage high-efficiency scrubber (1-15), and then enters the second-stage electrostatic precipitator I (2-3) and the second-stage electrostatic precipitator II (2-4) to further remove acid mist, moisture and dust from the flue gas;

[0145] An external air inlet pipe and an oxygen inlet pipe are also provided on the main electrostatic precipitator between the inlets of the secondary electrostatic precipitator I (2-3), the secondary electrostatic precipitator II (2-4) and the drying tower (3-1), and the entry of air and oxygen is controlled by the air supply valve I (2-5) and the oxygen supply valve II (2-6);

[0146] Under the condition of meeting the negative pressure of the system, by adjusting the two valves, by closing the air supply valve I (2-5) and opening the oxygen supply valve II (2-6), the frequency of the sulfur dioxide fan (3-12) can be reduced, the flue gas flow rate can be reduced, and the sulfur dioxide concentration before entering the next process section can reach 15%-20%, while the oxygen concentration can reach 13.5%-18%.

[0147] 3. Dry Absorption Section and Conversion Section: After passing through the secondary electrostatic precipitator I (2-3), the secondary electrostatic precipitator II (2-4), and the main electrostatic precipitator pipe, the flue gas enters the drying tower (3-1). The concentrated sulfuric acid spray solution in the drying circulation tank (3-2) is first pumped into the drying anode protection acid cooler (3-4), and then enters the second spray pipe. The second spray pipe sprays the flue gas in the drying tower (3-1), thereby absorbing moisture from the flue gas and drying it. The dried flue gas then passes through a carbon dioxide... After being pressurized by the sulfurization blower (3-12), the flue gas enters the shell-side pipeline of the secondary heat exchanger (4-5) in the conversion unit 4, and then enters the conversion tower (4-1). After being processed by the primary conversion section (4-2), some of the sulfur dioxide is converted into sulfur trioxide. The flue gas then enters the tube-side pipeline of the secondary heat exchanger (4-5), and after being discharged from the tube-side pipeline of the secondary heat exchanger (4-5), it passes through the steam jet tower (5-12) and enters the high-temperature absorption tower (5-1) of the HRS unit 5.

[0148] After the sulfur trioxide is absorbed by two-stage spraying in the high-temperature absorption tower (5-1), the flue gas is discharged from the top of the high-temperature absorption tower (5-1) and enters the shell-side pipeline of the primary heat exchanger (4-3). After being discharged from the shell-side pipeline of the primary heat exchanger (4-3), it enters the conversion tower (4-1). After passing through the secondary conversion section (4-4), the sulfur dioxide remaining in the flue gas after the primary conversion is further converted. The sulfur trioxide generated after the secondary conversion passes through the tube-side pipeline of the primary heat exchanger (4-3) and the secondary absorption tower (3-5) together with the flue gas. After being absorbed by the secondary absorption tower (3-5), the flue gas is discharged from the top of the secondary absorption tower (3-5) and sent to the subsequent tail gas desulfurization process.

[0149] The high-temperature absorption tower (5-1) is equipped with two-stage spray pipes to ensure that the temperature of the flue gas exiting the tower is <90℃. The concentrated sulfuric acid generated by the reaction passes sequentially through the high-temperature circulation tank (5-2), the pipe side of the steam generator (5-4), the pipe side of the evaporator feed water heater (5-6), the pipe side of the evaporator deaerator (5-7), the pipe side of the demineralized water heater (5-10), the drying circulation tank (3-2), the drying anode protection acid cooler (3-4), the drying tower (3-1), the secondary absorption circulation tank (3-6), the secondary absorption anode protection acid cooler (3-8), the secondary absorption tower (3-5), the high-temperature absorption tower (5-1), and the high-temperature circulation tank (5-2). Acids are exchanged between these devices to maintain the acid concentration in the drying circulation tank (3-2) at about 93%, the acid concentration in the secondary absorption circulation tank (3-6) at about 98.5%, and the acid concentration in the high-temperature circulation tank (5-2) at about 99.5%.

[0150] During this process, concentrated sulfuric acid in the secondary suction circulation tank (3-6) is separated into a branch, which passes through the secondary suction anode protection acid cooler (3-8) and the finished product anode protection acid cooler (3-9) in sequence, and then enters the finished product underground tank (3-10), where it is pumped out by the finished product acid transfer pump (3-11).

[0151] 4. Low-Temperature Waste Heat Recovery (HRS) Section: High-temperature, high-concentration sulfuric acid (approximately 99.5%) generated by two-stage spraying in the high-temperature absorption tower (5-1) exchanges heat with demineralized water that has passed through the shell-side pipelines of the demineralized water heater (5-10), the shell-side pipelines of the evaporative deaerator (5-7), the shell-side pipelines of the feedwater heater (5-6), and the shell-side pipelines of the steam generator (5-4). The cooled concentrated sulfuric acid is sent from the tube-side pipelines of the demineralized water heater (5-10) to the drying circulation tank (3-2) and the secondary absorption circulation tank (3-6). The heated demineralized water enters the shell-side pipelines of the steam generator (5-4) to generate steam for external use. The low-pressure steam generated by the shell-side pipelines of the evaporative deaerator (5-7) enters the steam jet tower (5-12) to heat the flue gas entering the high-temperature absorption tower (5-1) and provide thermal energy.

[0152] The system described in this utility model has a simple structure and is easy to operate. It can be applied to various smelting flue gas purification systems and acid concentration systems.

[0153] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0154] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0155] Finally, it should be noted that the above are merely preferred embodiments and application principles of this utility model. Those skilled in the art will understand that this utility model is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this utility model.

Claims

1. An oxygen-enriched acid production system combining HRS technology, characterized in that, Includes purification unit, electrostatic precipitator unit, dry suction unit, conversion unit, and HRS unit; The purification unit includes a primary high-efficiency scrubber, an inclined plate settling tank, a chamber filter press, a supernatant storage tank, an elevated water tank, a degassing tower, a waste acid storage tank, a gas cooling tower, a plate heat exchanger, and a secondary high-efficiency scrubber. The electrostatic precipitator unit includes a primary electrostatic precipitator I, a primary electrostatic precipitator II, a secondary electrostatic precipitator I, a secondary electrostatic precipitator II, and an electrostatic precipitator main pipe; The dry absorption unit includes a drying tower, a drying circulation tank, a drying anode protection acid cooler, a secondary absorption tower, a secondary absorption circulation tank, a secondary absorption anode protection acid cooler, a finished product anode protection acid cooler, and a finished product acid underground tank. The conversion unit includes a conversion tower, a primary heat exchanger, and a secondary heat exchanger; The HRS unit includes a high-temperature absorption tower, a high-temperature circulating tank, a steam generator, a mixer, an evaporator feedwater heater, an evaporative deaerator, a demineralized water heater, and a steam jet tower. The secondary high-efficiency scrubber in the purification unit is connected to the primary electro-demistor I and primary electro-demistor II in the electro-demistor unit, respectively. The electro-demistor main pipe in the electro-demistor unit is connected to the drying tower in the dry absorption unit. The drying tower in the dry absorption unit is connected to the secondary heat exchanger in the conversion unit. The high-temperature absorption tower of the HRS unit is connected to the primary heat exchanger in the conversion unit.

2. The oxygen-enriched acid production system combining HRS technology according to claim 1, characterized in that, The first high-efficiency washer has a first air inlet pipe on its side wall; the bottom of the first high-efficiency washer is connected to the first air inlet pipe through a first return pipe, and a first discharge pipe is also connected to the first return pipe, which is connected to the input end of the inclined plate settling tank. The inclined plate settling tank has two output ends: a first output end at the bottom and a second output end at the top. The first output end at the bottom of the inclined plate settling tank is connected to the input end of the chamber filter press through a second discharge pipe; the second output end at the top of the inclined plate settling tank is connected to the input end of the supernatant storage tank through a pipeline. The chamber filter press has two output ends, namely the third output end at the top and the fourth output end at the bottom. The third output end at the top of the chamber filter press is connected to the input end of the supernatant storage tank through a pipeline. The supernatant storage tank has two output ends, namely the fifth output end at the bottom and the sixth output end at the top. The fifth output end at the bottom of the supernatant storage tank is connected to the input end of the degassing tower through the third discharge pipe, and the sixth output end at the top of the supernatant storage tank is connected to the first-stage high-efficiency scrubber through a pipeline. The third discharge pipe is also equipped with a first bypass pipe, which is connected to the input end of the high-level water tank. The elevated water tank has two output terminals, namely the seventh output terminal and the eighth output terminal; The bottom of the degassing tower is connected to the input end of the waste acid storage tank via a pipeline, and the output end of the waste acid storage tank is discharged externally through the first external discharge pipe; the gas cooling tower is also equipped with a first spray pipe; The middle section of the secondary high-efficiency scrubber is connected to the middle section of the gas cooling tower via a pipeline, and the middle section of the gas cooling tower is connected to the middle section of the primary high-efficiency scrubber via a pipeline. The secondary high-efficiency washer also has a second air intake pipe on its side wall; The exhaust end at the top of the first-stage high-efficiency scrubber is also connected to the gas cooling tower through the first exhaust pipe; the exhaust end at the top of the gas cooling tower is also connected to the inlet end of the second air inlet pipe through the second exhaust pipe.

3. The oxygen-enriched acid production system combining HRS technology according to claim 1, characterized in that, The plate heat exchanger includes tube-side piping and shell-side piping; The bottom of the gas cooling tower is connected to the inlet end of the tube-side pipe of the plate heat exchanger through the first heat exchange pipe, and the outlet end of the tube-side pipe of the plate heat exchanger is discharged externally through the pipe. The inlet end of the first spray pipe extends out of the side wall of the gas cooling tower, and the outlet end of the shell-side pipe of the plate heat exchanger is connected to the inlet end of the first spray pipe through the second heat exchange pipe.

4. The oxygen-enriched acid production system combining HRS technology according to claim 2, characterized in that, The seventh output end of the high-level water tank is connected to the first air inlet pipe of the first-stage high-efficiency scrubber via a pipeline, and the eighth output end of the high-level water tank is connected to the first-stage high-efficiency scrubber via a pipeline.

5. The oxygen-enriched acid production system combining HRS technology according to claim 2, characterized in that, The exhaust end at the top of the secondary high-efficiency scrubber is also connected to a third exhaust pipe. The third exhaust pipe has two branches, namely the first branch and the second branch. The first branch is connected to the input end of the primary electrostatic precipitator I, and the second branch is connected to the input end of the primary electrostatic precipitator II. The output end of the primary electrostatic precipitator I is connected to the input end of the secondary electrostatic precipitator I through a pipe, and the output end of the primary electrostatic precipitator II is connected to the input end of the secondary electrostatic precipitator II through a pipe. The output ends of the secondary electrostatic precipitators I and II are both connected to the input end of the electrostatic precipitator main pipe through pipes. External air is connected to the main electrostatic precipitator through an air inlet pipe, and external oxygen is connected to the main electrostatic precipitator through an oxygen inlet pipe.

6. The oxygen-enriched acid production system combining HRS technology according to claim 5, characterized in that, The output end of the electrostatic precipitator is connected to the lower part of the drying tower. The output end of the bottom of the drying tower is connected to the input end of the drying circulation tank through the fourth discharge pipe. The output end of the drying circulation tank is connected to the input end of the drying anode protection acid cooler through the fifth discharge pipe. Both primary and secondary heat exchangers include tube-side piping and shell-side piping. The drying tower is also equipped with a second spray pipe. The input end of the second spray pipe extends out of the side wall of the drying tower. The output end of the drying anode protection acid cooler is connected to the input end of the second spray pipe through a pipeline. The exhaust end at the top of the drying tower is also connected to the input end of the shell-side pipeline of the secondary heat exchanger through a fourth exhaust pipe. The fifth discharge pipe is also equipped with a second bypass pipe and a third bypass pipe. The second bypass pipe is connected to the input end of the mixer.

7. The oxygen-enriched acid production system combining HRS technology according to claim 1, characterized in that, The conversion tower is divided into an upper gas chamber and a lower gas chamber by a partition. The output end of the shell-side piping of the secondary heat exchanger is connected to the input end at the top of the upper gas chamber of the conversion tower via a pipeline. The conversion tower has two output ends, namely the ninth output end located in the upper gas chamber and the tenth output end located in the lower gas chamber. The ninth output end is connected to the input end of the tube-side pipeline of the secondary heat exchanger through the sixth discharge pipe. The tenth output end is connected to the input end of the tube-side pipeline of the primary heat exchanger through the seventh discharge pipe; The output end of the tube-side piping of the secondary heat exchanger is connected to the input end of the steam jet tower via a pipeline, and the output end of the steam jet tower is connected to the lower part of the high-temperature absorption tower via a pipeline. The output end of the shell-side pipeline of the primary heat exchanger is connected to the lower gas chamber of the conversion tower through the eighth discharge pipe, and the output end of the tube-side pipeline of the primary heat exchanger is connected to the lower part of the secondary absorption tower through a pipeline. The upper gas chamber of the conversion tower is equipped with a primary conversion section, and the lower gas chamber of the conversion tower is equipped with a secondary conversion section.

8. The oxygen-enriched acid production system combining HRS technology according to claim 7, characterized in that, The output end of the bottom of the second suction tower is connected to the input end of the second suction circulation tank through the ninth discharge pipe; The top of the second suction tower is equipped with an exhaust end, through which the exhaust gas inside the second suction tower is discharged. The output end of the double-suction circulation tank is connected to the input end of the double-suction anode protection acid cooler through a pipeline. The output end of the double-absorption anode protection acid cooler has three branches, namely the third branch, the fourth branch and the fifth branch. The third branch is connected to the input end of the finished anode protection acid cooler, and the output end of the finished anode protection acid cooler is connected to the input end of the finished acid underground tank through a pipeline. The second suction tower is also equipped with a third spray pipe. The input end of the third spray pipe extends out of the side wall of the second suction tower, and the fourth branch is connected to the input end of the third spray pipe. The high-temperature absorption tower is equipped with a fourth spray pipe and a fifth spray pipe. The input ends of the fourth spray pipe and the fifth spray pipe both extend out of the high-temperature absorption tower, and the fifth branch is connected to the input end of the fourth spray pipe. Steam generators, evaporator feedwater heaters, evaporative deaerators, and demineralized water heaters all include tube-side piping and shell-side piping. The bottom of the high-temperature absorption tower is connected to the input end of the high-temperature circulation tank via a pipeline, and the output end of the high-temperature circulation tank is connected to the input end of the tube side pipeline of the steam generator via a pipeline. The exhaust end at the top of the high-temperature absorption tower is also connected to the input end of the shell-side pipeline of the primary heat exchanger through the fifth exhaust pipe. The output end of the tube side of the steam generator is connected to the input end of the mixer through the tenth discharge pipe; The output of the mixer is connected to the input of the fifth spray pipe via a pipeline.

9. The oxygen-enriched acid production system combining HRS technology according to claim 8, characterized in that, The tenth discharge pipe is also equipped with a fourth bypass pipe, which is connected to the input end of the tube-side pipe of the evaporator feed water heater. The output end of the tube-side pipe of the evaporator feed water heater is connected to the input end of the tube-side pipe of the evaporator deaerator through a pipe. The output end of the tube-side pipeline of the evaporative deaerator is connected to the input end of the tube-side pipeline of the demineralized water heater through a pipeline; the output end of the tube-side pipeline of the demineralized water heater is provided with two branches, namely the sixth branch and the seventh branch. The sixth branch is connected to the side wall of the ninth discharge pipe, and the seventh branch is connected to the side wall of the fourth discharge pipe. The external demineralized water is connected to the input end of the shell-side pipeline of the demineralized water heater through the demineralized water inlet pipe. The demineralized water inlet pipe is equipped with a demineralized water pump. The output end of the shell-side pipeline of the demineralized water heater is connected to the input end of the shell-side pipeline of the evaporative deaerator through a pipeline.

10. The oxygen-enriched acid production system combining HRS technology according to claim 8, characterized in that, The shell-side piping of the evaporative deaerator has two output ends, namely the eleventh output end at the top and the twelfth output end at the bottom. The eleventh output end is connected to the input end of the steam jet tower through a pipeline. The twelfth output terminal has two branches, namely the eighth branch and the ninth branch. The eighth branch is connected to the input end of the shell-side pipe of the evaporator feedwater heater. The output end of the shell-side pipe of the evaporator feedwater heater is connected to the input end of the shell-side pipe of the steam generator through a pipe. An evaporator feedwater pump is installed on the eighth branch.

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