Device for co-producing sodium metabisulfite by sulfur-to-acid process and sulfur dioxide process

Abstract

The utility model discloses a device for co-production of sodium pyrosulfite by a sulfur-to-acid process and a sulfur dioxide process. The utility model relates to the technical field of chemical product preparation. The device comprises sulfur acid making equipment and liquid sulfur dioxide generating equipment, wherein the sulfur acid making equipment comprises a first sulfur burning furnace, a high-pressure boiler, a conversion absorption tower, a sulfuric acid storage tank, a first acid pickling tower, a first demister, a booster fan and a pyrosulfite synthesis reaction kettle; the pressurizing fan is communicated with the pyrosulfite synthesis reaction kettle through a smoke inlet pipe; the liquid sulfur dioxide generation equipment comprises a second sulfur burning furnace, a waste heat boiler, a second pickling tower, a second demister, a sulfur dioxide compressor and a liquid sulfur dioxide storage tank; and the sulfur dioxide compressor is communicated with the smoke inlet pipe through metering adjusting equipment. According to the utility model, by transforming the technological process, metering and adjusting equipment is added from liquid sulfur dioxide production equipment to adjust and control the smoke concentration of sodium pyrosulfite, so that the smoke concentration is stably adjusted and controlled in real time, and the technological requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical product preparation, in particular to a device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process. Background Art

[0002] The flue gas (low-concentration sulfur dioxide gas) produced in the sulfuric acid plant is sent to the synthesis reactor after cooling, pickling, demisting, and pressurization to react with soda solution to produce sodium metabisulfite. Due to the influence of flue gas concentration, the output of sodium metabisulfite produced is low and the mother liquor cannot be balanced. Utility Model Content

[0003] The purpose of the utility model is to address the above-mentioned deficiencies of the prior art and propose a device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process, thereby solving the problem of the unbalanced product quality and mother liquor when sulfur-based acid production and sodium pyrosulfite production are co-produced.

[0004] The utility model discloses a device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process, comprising a sulfur-based acid production device and a liquid sulfur dioxide production device, wherein the sulfur-based acid production device comprises a first sulfur incinerator, a high-pressure boiler, a conversion absorption tower, a sulfuric acid storage tank, a first acid washing tower, a first demister, a pressurized fan and a pyrosulfite synthesis reactor; the first sulfur incinerator, the high-pressure boiler, the conversion absorption tower and the sulfuric acid storage tank are sequentially connected, the high-pressure boiler, the first acid washing tower, the first demister, the pressurized fan and the pyrosulfite synthesis reactor are sequentially connected, and the pressurized fan is connected to the pyrosulfite synthesis reactor through a smoke inlet pipe;

[0005] The liquid sulfur dioxide generating equipment comprises a second sulfur incinerator, a waste heat boiler, a second acid washing tower, a second demister, a sulfur dioxide compressor, and a liquid sulfur dioxide storage tank which are sequentially connected;

[0006] The sulfur dioxide compressor is connected to the smoke inlet pipe through a metering and regulating device.

[0007] Furthermore, the metering and regulating equipment includes a smoke supply pipe, a flow meter and two regulating valves. The sulfur dioxide compressor is connected to the smoke inlet pipe through the smoke supply pipe. The flow meter and the two regulating valves are arranged on the smoke supply pipe.

[0008] Furthermore, the two regulating valves are arranged at both ends of the flow meter.

[0009] Furthermore, the gas source of the first sulfur incinerator is dry air.

[0010] Furthermore, the gas source of the second sulfur incinerator is oxygen.

[0011] Furthermore, the raw sulfur of the first sulfur incinerator and the second sulfur incinerator are both liquid sulfur.

[0012] Furthermore, the waste heat boiler includes a primary waste heat boiler and a secondary waste heat boiler that are connected to each other.

[0013] Furthermore, the high-pressure boiler is connected to the first pickling tower through a first connecting pipe, and a first valve is provided on the first connecting pipe.

[0014] Furthermore, the high-pressure boiler is connected to the conversion absorption tower through a second connecting pipe, and the second connecting pipe is provided with a second valve.

[0015] A device for co-producing sodium metabisulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process. The device calculates the flue gas concentration entering a metabisulfite synthesis reactor. If the flue gas concentration is too low, a metering and regulating device is opened to adjust the flue gas concentration entering the metabisulfite synthesis reactor to meet the requirements for the sodium metabisulfite product content.

[0016] The utility model improves the process flow by adding metering and regulating equipment to the liquid sulfur dioxide production equipment, that is, a process pipeline is drawn out to adjust the flue gas concentration entering the pyrolysis reactor after metering, so that the flue gas concentration can be stably regulated in real time to meet the process requirements of the subsequent process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the structure of a device for producing sodium metabisulfite by combining a sulfur-based acid process with a sulfur-based sulfur dioxide process.

[0018] 1. The first sulfur incinerator; 2. The high-pressure boiler; 3. The conversion absorption tower; 4. The sulfuric acid storage tank; 5. The first pickling tower; 6. The first demister; 7. The pressure fan; 8. The pyrolysis reactor; 9. The second sulfur incinerator; 10. The waste heat boiler; 101. The first waste heat boiler; 102. The second waste heat boiler; 11. The second pickling tower; 12. The second demister; 13. The sulfur dioxide compressor; 14. The liquid sulfur dioxide storage tank; 15. The smoke inlet pipe; 16. The metering and regulating equipment; 161. The smoke supply pipe; 162. The flow meter; 163. The regulating valve; 17. The first connecting pipe; 18. The first valve; 19. The second connecting pipe; 20. The second valve. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] Example 1

[0021] like Figure 1As shown, a device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process of the utility model comprises a sulfur-based acid production device and a liquid sulfur dioxide production device, wherein the sulfur-based acid production device comprises a first sulfur incinerator 1, a high-pressure boiler 2, a conversion absorption tower 3, a sulfuric acid storage tank 4, a first acid washing tower 5, a first demister 6, a pressurized fan 7 and a pyrosulfite synthesis reactor 8; the first sulfur incinerator 1, the high-pressure boiler 2, the conversion absorption tower 3, and the sulfuric acid storage tank 4 are sequentially connected, the high-pressure boiler 2, the first acid washing tower 5, the first demister 6, the pressurized fan 7 and the pyrosulfite synthesis reactor 8 are sequentially connected, and the pressurized fan 7 is connected to the pyrosulfite synthesis reactor 8 through a smoke inlet pipe 15;

[0022] The liquid sulfur dioxide generating equipment comprises a second sulfur incinerator 9, a waste heat boiler 10, a second acid washing tower 11, a second demister 12, a sulfur dioxide compressor 13, and a liquid sulfur dioxide storage tank 14 which are connected in sequence;

[0023] The sulfur dioxide compressor 13 is connected to the smoke inlet pipe 15 through a metering and regulating device 16 .

[0024] The utility model improves the process flow by adding a metering and regulating device 16 to the liquid sulfur dioxide production equipment, that is, a process pipeline is drawn out to adjust the flue gas concentration entering the pyrolysis reactor after metering, so that the flue gas concentration can be stably regulated in real time to meet the process requirements of the subsequent process.

[0025] In this embodiment, the metering and regulating device 16 may include a smoke supply pipe 161, a flow meter 162 and two regulating valves 163. The sulfur dioxide compressor 13 is connected to the smoke inlet pipe 15 through the smoke supply pipe 161. The flow meter 162 and the two regulating valves 163 are arranged on the smoke supply pipe 161. The flow rate of the smoke entering the smoke inlet pipe 15 is regulated by the flow meter 162 and the two regulating valves 163. In order to facilitate regulation and control, the two regulating valves 163 may be arranged at both ends of the flow meter 162.

[0026] In the device of this embodiment, the gas source of the first sulfur incinerator 1 is dry air. The gas source of the second sulfur incinerator 9 is oxygen. The raw sulfur of the first sulfur incinerator 1 and the second sulfur incinerator 9 is liquid sulfur.

[0027] In the device of this embodiment, the waste heat boiler 10 may include a primary waste heat boiler 101 and a secondary waste heat boiler 102 that are connected to each other.

[0028] In the device of this embodiment, the high-pressure boiler 2 can be connected to the first acid washing tower 5 through a first connecting pipe 17, and a first valve 18 is provided on the first connecting pipe 17. The high-pressure boiler 2 is connected to the conversion absorption tower 3 through a second connecting pipe 19, and a second valve 20 is provided on the second connecting pipe 19.

[0029] A device for co-producing sodium metabisulfite by a sulfur-based acid process and a sulfur-based sulfur dioxide process; by calculating the sulfur raw material in the first sulfur incinerator 1 and the amount of sulfuric acid in the conversion absorption tower 3, the flue gas concentration entering the metabisulfite synthesis reactor 8 is obtained, and then the metering and regulating device 16 is turned on to adjust the flue gas concentration entering the metabisulfite synthesis reactor 8 to meet the requirements for the sodium metabisulfite product content.

[0030] After the flue gas concentration is stabilized and adjusted, the content of the sodium metabisulfite product produced is increased to 97.5%, reaching the standard of superior products, and the production capacity reaches the designed value.

[0031] For matters not mentioned above, the prior art applies.

[0032] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the utility model. Those skilled in the art of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the direction of the utility model or exceed the scope defined by the attached claims. Those skilled in the art should understand that any modification, equivalent replacement, improvement, etc. made to the above implementation methods based on the technical essence of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process, characterized in that: The invention comprises a sulfuric acid production device and a liquid sulfur dioxide production device, wherein the sulfuric acid production device comprises a first sulfur incinerator (1), a high-pressure boiler (2), a conversion absorption tower (3), a sulfuric acid storage tank (4), a first acid washing tower (5), a first demister (6), a pressurized fan (7) and a pyrolysis reactor (8); the first sulfur incinerator (1), the high-pressure boiler (2), the conversion absorption tower (3) and the sulfuric acid storage tank (4) are sequentially connected, the high-pressure boiler (2), the first acid washing tower (5), the first demister (6), the pressurized fan (7) and the pyrolysis reactor (8) are sequentially connected, and the pressurized fan (7) is connected to the pyrolysis reactor (8) through a smoke inlet pipe (15); The liquid sulfur dioxide generating equipment comprises a second sulfur incinerator (9), a waste heat boiler (10), a second acid washing tower (11), a second demister (12), a sulfur dioxide compressor (13), and a liquid sulfur dioxide storage tank (14) which are sequentially connected; The sulfur dioxide compressor (13) is connected to the smoke inlet pipe (15) via a metering and regulating device (16).

2. The device for co-producing sodium pyrosulfite by a sulfuric acid production process and a sulfuric sulfur dioxide production process as claimed in claim 1, characterized in that: The metering and regulating device (16) comprises a smoke supply pipe (161), a flow meter (162) and two regulating valves (163); the sulfur dioxide compressor (13) is connected to the smoke inlet pipe (15) through the smoke supply pipe (161); the flow meter (162) and the two regulating valves (163) are arranged on the smoke supply pipe (161).

3. The device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process as claimed in claim 2, characterized in that: The two regulating valves (163) are arranged at both ends of the flow meter (162).

4. The device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process as claimed in claim 1, characterized in that: The gas source of the first sulfur incinerator (1) is dry air.

5. The device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process as claimed in claim 1, characterized in that: The gas source of the second sulfur incinerator (9) is oxygen.

6. The device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process as claimed in claim 1, characterized in that: The raw sulfur of the first sulfur incinerator (1) and the second sulfur incinerator (9) is liquid sulfur.

7. The device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process as claimed in claim 1, characterized in that: The waste heat boiler (10) comprises a primary waste heat boiler (101) and a secondary waste heat boiler (102) which are connected to each other.

8. The device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process as claimed in claim 1, characterized in that: The high-pressure boiler (2) is connected to the first acid washing tower (5) via a first connecting pipe (17), and a first valve (18) is provided on the first connecting pipe (17).

9. The device for co-producing sodium pyrosulfite by a sulfur-based acid production process and a sulfur-based sulfur dioxide production process as claimed in claim 8, characterized in that: The high-pressure boiler (2) is connected to the conversion absorption tower (3) via a second connecting pipe (19), and a second valve (20) is provided on the second connecting pipe (19).

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