Sulfuric acid tail gas condensation recovery device

Abstract

The utility model discloses a sulfuric acid tail gas condensation recovery device, which is applied to the field of sulfuric acid tail gas treatment and comprises a condensation tank, a primary condensation mechanism is arranged on the condensation tank, and a secondary condensation mechanism is arranged on one side of the primary condensation mechanism. Firstly, the first-stage condensation mechanism and the second-stage condensation mechanism can perform fractional condensation treatment on sulfuric acid tail gas, can perform fractional condensation on sulfides with different boiling points, such as SOS, CS and thioether, in the tail gas, and can realize condensation grading of the sulfides in the sulfuric acid tail gas through multi-stage condensation and temperature gradient design, so that the recovery rate of the sulfuric acid tail gas is improved.

Description

Technical Field

[0001] This utility model belongs to the field of sulfuric acid tail gas treatment technology, and specifically relates to a sulfuric acid tail gas condensation and recovery device. Background Technology

[0002] In the sulfuric acid industry, tail gas emissions are one of the main sources of environmental pollution. Sulfuric acid tail gas usually contains pollutants such as sulfur dioxide (SO2), sulfur trioxide (SO3), sulfuric acid mist, and particulate matter. If it is discharged directly without effective treatment, it will not only lead to environmental problems such as acid rain, but also pose a serious threat to human health and ecological security.

[0003] The current announcement of Chinese utility model patent CN214552476U discloses a sulfuric acid tail gas recovery device, which is equipped with a recovery tower and a first filter tower for storing liquid on one side of the recovery tower; the above technical solution solves the problem of sulfuric acid vapor being directly emitted into the outside or indoor environment, causing pollution to the outside or indoor environment.

[0004] This patent uses only a single condenser for condensation, and the temperature gradient design is crude, which results in the inability to condense sulfides with different boiling points in the exhaust gas in stages, leading to a low recovery rate. Utility Model Content

[0005] The purpose of this invention is to provide a sulfuric acid tail gas condensation and recovery device, which solves the problem that the existing sulfuric acid tail gas condensation and recovery device uses only a single condenser for condensation, has a crude temperature gradient design, and therefore cannot condense sulfides with different boiling points in the tail gas in stages, resulting in a low recovery rate.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a sulfuric acid tail gas condensation and recovery device, including a condensation tank, a primary condensation mechanism is provided on the condensation tank, and a secondary condensation mechanism is provided on one side of the primary condensation mechanism.

[0007] The primary condensation mechanism includes an air inlet, a fixed rod, a spiral cavity, a water inlet, and a water outlet. The air inlet is located on one side of the condensation tank, the fixed rod is fixedly located inside the condensation tank, the spiral cavity is fixedly located on the fixed rod, the water inlet is located on one side of the condensation tank, and the water outlet is located on the other side of the condensation tank.

[0008] By adopting the above technical solution, and by setting up a condenser tank, a primary condensation mechanism, and a secondary condensation mechanism, the primary and secondary condensation mechanisms can first perform staged condensation treatment on the sulfuric acid tail gas, and can perform staged condensation on sulfides with different boiling points in the tail gas, such as SO2, CS2, and sulfides. The primary condensation mechanism includes an air inlet, a fixing rod, a spiral cavity, a water inlet, and a water outlet. In use, the fixing rod first fixes the spiral cavity, then the condensate enters the spiral cavity through the water inlet, and then the condensate with increased temperature is discharged through the water outlet. Then, the sulfuric acid tail gas is discharged into the interior of the condenser tank, so that the sulfuric acid tail gas and the condensate exchange heat, initially reducing the temperature of the sulfuric acid tail gas and initially condensing the sulfides in the sulfuric acid tail gas.

[0009] Furthermore: the secondary condensation mechanism includes a condenser cylinder, a fixed plate, and a tube sheet. The condenser cylinder is disposed on one side of the condenser tank. The fixed plate is fixedly disposed on the upper surface of the condenser cylinder by bolts. The tube sheet is fixedly disposed on the fixed plate and is located inside the condenser cylinder. There are several tube sheets arranged circumferentially, and the several tube sheets are interconnected.

[0010] By adopting the above technical solution, and by setting up a condenser, a fixing plate, and a tube sheet, the condenser first performs secondary condensation on the sulfuric acid tail gas, then the fixing plate is installed on the tube sheet and fixed to the condenser with bolts. Then, the tube sheet has a built-in liquid nitrogen circulation system to perform secondary condensation on the sulfuric acid tail gas entering the condenser, thus achieving staged condensation.

[0011] Furthermore: a connecting pipe is provided between the condenser tank and the condenser cylinder, with both ends of the connecting pipe extending between the condenser tank and the condenser cylinder, and a vacuum pump is provided on the connecting pipe.

[0012] Using the above technical solution, by setting up a connecting pipe and a vacuum pump, in use, the connecting pipe first connects the condenser tank and the condenser cylinder. By operating the vacuum pump, the sulfuric acid tail gas after condensation in the condenser tank is discharged into the condenser cylinder for secondary condensation.

[0013] Furthermore: the condenser cylinder is provided with an exhaust pipe, and the exhaust pipe is provided with a hollow fiber membrane separator.

[0014] By adopting the above technical solution, and by setting up an outlet pipe and a hollow fiber membrane separator, the sulfuric acid tail gas after condensation in the condenser is condensed again and discharged through the outlet pipe for recovery during use. The uncondensed trace amounts of SO2 are then selectively enriched by the hollow fiber membrane separator.

[0015] Furthermore: a heater is fixedly installed on the lower surface of the condenser, and a discharge pipe is provided on one side of the condenser.

[0016] Using the above technical solution, by setting up a heater and a discharge pipe, when in use, the sulfuric acid tail gas in the condenser is condensed and then collects at the bottom of the condenser. After a long period of accumulation, the sulfide solidifies. At this time, the heater is turned on to heat the sulfide, turning it into a liquid and discharging it through the discharge pipe.

[0017] Furthermore, a temperature sensor is fixedly installed inside the condenser.

[0018] By adopting the above technical solution, a temperature sensor is set up to monitor the temperature inside the condenser during use. When the temperature inside the condenser exceeds the predetermined temperature, the condensate is drained and new condensate is drained in.

[0019] Furthermore, the lower surface of the condenser is fixedly provided with two support legs, which are arranged symmetrically.

[0020] By adopting the above technical solution and setting up support legs, the support legs can provide support for the condenser tank during use, allowing the condenser tank to be placed on a level ground and improving the stability of the condenser tank.

[0021] Furthermore, the condenser and condenser cylinder are made of stainless steel.

[0022] By adopting the above technical solution, the materials of the condenser and condenser are set. Both the condenser tube and the condenser are made of stainless steel. Stainless steel has high corrosion resistance in acidic environments, which can achieve efficient and stable condensation of sulfuric acid tail gas.

[0023] In summary, this utility model has the following beneficial effects:

[0024] By setting up a primary condensation mechanism, during use, the fixing rod first fixes the spiral cavity, then the condensate enters the spiral cavity through the inlet, and then the condensate with increased temperature is discharged through the outlet. Then, the sulfuric acid tail gas is discharged into the interior of the condensation tank, so that the sulfuric acid tail gas and the condensate exchange heat, initially reducing the temperature of the sulfuric acid tail gas and initially condensing the sulfides in the sulfuric acid tail gas.

[0025] By setting up a two-stage condensation mechanism, during use, the condenser first performs secondary condensation on the sulfuric acid tail gas, then the fixing plate is installed on the tube sheet and fixed to the condenser by bolts. Then, the tube sheet has a built-in liquid nitrogen circulation system to perform secondary condensation on the sulfuric acid tail gas entering the condenser, thus achieving staged condensation.

[0026] Based on the above improvements, the overall technical effect achieved by this device is that it can achieve sulfide condensation and classification in sulfuric acid tail gas through multi-stage condensation and temperature gradient design, thereby improving the recovery rate of sulfuric acid tail gas. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a left view of the present invention;

[0029] Figure 3 This is the utility model Figure 2 3D cross-sectional view at point AA;

[0030] Figure 4 This is a structural schematic diagram of the condenser, air inlet, and water inlet of this utility model.

[0031] In the diagram, 1. Condenser tank; 2. Primary condenser mechanism; 3. Secondary condenser mechanism; 4. Connecting pipe; 5. Air pump; 6. Air outlet pipe; 7. Hollow fiber membrane separator; 8. Heater; 9. Discharge pipe; 10. Temperature sensor; 11. Support leg; 201. Air inlet; 202. Fixing rod; 203. Spiral cavity; 204. Water inlet; 205. Water outlet; 301. Condenser cylinder; 302. Fixing plate; 303. Tube sheet. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Example:

[0034] Please see Figures 1-4 The present invention provides a technical solution: a sulfuric acid tail gas condensation and recovery device, including a condensation tank 1, a primary condensation mechanism 2 is provided on the condensation tank 1, and a secondary condensation mechanism 3 is provided on one side of the primary condensation mechanism 2;

[0035] The primary condensation mechanism 2 includes an air inlet 201, a fixing rod 202, a spiral cavity 203, a water inlet 204, and a water outlet 205. The air inlet 201 is located on one side of the condenser tank 1, the fixing rod 202 is fixedly located inside the condenser tank 1, the spiral cavity 203 is fixedly located on the fixing rod 202, the water inlet 204 is located on one side of the condenser tank 1, and the water outlet 205 is located on the other side of the condenser tank 1.

[0036] By setting up a condenser tank 1, a primary condensation mechanism 2, and a secondary condensation mechanism 3, in use, the primary condensation mechanism 2 and the secondary condensation mechanism 3 can first perform staged condensation treatment on the sulfuric acid tail gas, and can perform staged condensation on sulfides with different boiling points in the tail gas, such as SO2, CS2, and sulfides. The primary condensation mechanism 2 includes an air inlet 201, a fixing rod 202, a spiral cavity 203, a water inlet 204, and a water outlet 205. In use, the fixing rod 202 first fixes the spiral cavity 203, and then the condensate enters the spiral cavity 203 through the water inlet 204. Then, the condensate with increased temperature is discharged through the water outlet 205. Then, the sulfuric acid tail gas is discharged into the interior of the condenser tank 1, so that the sulfuric acid tail gas and the condensate exchange heat, initially reducing the temperature of the sulfuric acid tail gas and initially condensing the sulfides in the sulfuric acid tail gas.

[0037] refer to Figure 3 The secondary condensation mechanism 3 includes a condenser cylinder 301, a fixing plate 302, and a tube sheet 303. The condenser cylinder 301 is located on one side of the condenser tank 1. The fixing plate 302 is fixed to the upper surface of the condenser cylinder 301 by bolts. The tube sheet 303 is fixed on the fixing plate 302 and is located inside the condenser cylinder 301. There are several tube sheets 303 arranged circumferentially, and the tube sheets 303 are interconnected. By setting up the condenser cylinder 301, the fixing plate 302, and the tube sheet 303, in use, the condenser cylinder 301 can first perform secondary condensation on the sulfuric acid tail gas. Then, the fixing plate 302 installs the tube sheet 303 and fixes it to the condenser cylinder 301 by bolts. Then, the tube sheet 303 has a built-in liquid nitrogen circulation system to perform secondary condensation on the sulfuric acid tail gas entering the condenser cylinder 301, thus achieving staged condensation.

[0038] refer to Figure 1 A connecting pipe 4 is provided between the condenser tank 1 and the condenser cylinder 301. Both ends of the connecting pipe 4 extend between the condenser tank 1 and the condenser cylinder 301. A vacuum pump 5 is provided on the connecting pipe 4. By setting the connecting pipe 4 and the vacuum pump 5, in use, the connecting pipe 4 first connects the condenser tank 1 and the condenser cylinder 301. By operating the vacuum pump 5, the sulfuric acid tail gas after condensation in the condenser tank 1 is discharged into the condenser cylinder 301 for secondary condensation.

[0039] refer to Figure 1 The condenser cylinder 301 is equipped with an outlet pipe 6, and a hollow fiber membrane separator 7 is installed on the outlet pipe 6. By setting the outlet pipe 6 and the hollow fiber membrane separator 7, during use, the sulfuric acid tail gas after condensation in the condenser cylinder 301 is condensed again and discharged through the outlet pipe 6 for recovery. The uncondensed trace amounts of SO2 are selectively permeated and enriched by the hollow fiber membrane separator 7.

[0040] refer to Figure 1A heater 8 is fixedly installed on the lower surface of the condenser 1, and a discharge pipe 9 is installed on one side of the condenser 1. By installing the heater 8 and the discharge pipe 9, when in use, the sulfuric acid tail gas in the condenser 1 is condensed and then collects at the bottom of the condenser 1. After a long period of accumulation, the sulfide solidifies. At this time, the heater 8 is turned on to heat the sulfide, so that the sulfide becomes liquid and is discharged through the discharge pipe 9.

[0041] refer to Figure 3 A temperature sensor 10 is fixedly installed inside the condenser tank 1. By installing the temperature sensor 10, the temperature sensor 10 can monitor the temperature inside the condenser tank 1 during use. When the temperature inside the condenser tank 1 exceeds the predetermined temperature, the condensate is discharged and new condensate is discharged.

[0042] refer to Figure 1 The lower surface of the condenser tank 1 is fixedly provided with two support legs 11 arranged symmetrically. By providing support legs 11, the condenser tank 1 can be supported during use, so that the condenser tank 1 can be placed on a horizontal ground and the stability of the condenser tank 1 can be improved.

[0043] refer to Figure 1 The condenser tank 1 and the condenser cylinder 301 are made of stainless steel. By setting the materials of the condenser tank 1 and the condenser cylinder 301, the condenser tube and the condenser cylinder 301 are both made of stainless steel. Stainless steel achieves high corrosion resistance in acidic materials, which can realize efficient and stable condensation of sulfuric acid tail gas.

[0044] Brief description of usage:

[0045] In use, firstly, the fixing rod 202 can fix the spiral cavity 203, then the condensate enters the spiral cavity 203 through the water inlet 204, and then the condensate after the temperature rise is discharged through the water outlet 205. Then, the sulfuric acid tail gas is discharged into the interior of the condenser tank 1, so that the sulfuric acid tail gas and the condensate exchange heat, initially reducing the temperature of the sulfuric acid tail gas and initially condensing the sulfides in the sulfuric acid tail gas.

[0046] Then, the connecting pipe 4 connects the condenser tank 1 and the condenser cylinder 301. Through the operation of the vacuum pump 5, the sulfuric acid tail gas after condensation in the condenser tank 1 is discharged into the condenser cylinder 301 for secondary condensation. The condenser cylinder 301 can perform secondary condensation on the sulfuric acid tail gas. Then, the fixing plate 302 is installed on the tube sheet 303. The fixing plate 302 is fixed to the condenser cylinder 301 by bolts. Then, the tube sheet 303 has a built-in liquid nitrogen circulation system to perform secondary condensation on the sulfuric acid tail gas entering the condenser cylinder 301, realizing staged condensation.

[0047] Finally, the sulfuric acid tail gas after condensation in the condenser 301 is condensed again and discharged through the outlet pipe 6 for recovery. It then passes through the hollow fiber membrane separator 7 to selectively enrich the trace amounts of uncondensed SO2. After condensation, the sulfuric acid tail gas in the condenser 1 accumulates at the bottom of the condenser 1 and solidifies over a long period of time. At this time, the heater 8 is turned on to heat the sulfide, turning it into a liquid and discharging it through the discharge pipe 9.

[0048] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A sulfuric acid tail gas condensation and recovery device, comprising a condenser (1), characterized in that: The condenser (1) is provided with a primary condensation mechanism (2), and a secondary condensation mechanism (3) is provided on one side of the primary condensation mechanism (2). The primary condensation mechanism (2) includes an air inlet (201), a fixing rod (202), a spiral cavity (203), a water inlet (204), and a water outlet (205). The air inlet (201) is located on one side of the condenser (1), the fixing rod (202) is fixedly located inside the condenser (1), the spiral cavity (203) is fixedly located on the fixing rod (202), the water inlet (204) is located on one side of the condenser (1), and the water outlet (205) is located on the other side of the condenser (1).

2. The sulfuric acid tail gas condensation and recovery device according to claim 1, characterized in that: The secondary condensation mechanism (3) includes a condenser cylinder (301), a fixing plate (302), and a tube sheet (303). The condenser cylinder (301) is located on one side of the condenser tank (1). The fixing plate (302) is fixed to the upper surface of the condenser cylinder (301) by bolts. The tube sheet (303) is fixed on the fixing plate (302) and is located inside the condenser cylinder (301). There are several tube sheets (303) arranged in a circle. Several tube sheets (303) are interconnected. The tube sheet (303) has a built-in liquid nitrogen circulation system.

3. The sulfuric acid tail gas condensation and recovery device according to claim 2, characterized in that: A connecting pipe (4) is provided between the condenser (1) and the condenser cylinder (301), with both ends of the connecting pipe (4) extending between the condenser (1) and the condenser cylinder (301), and a vacuum pump (5) is provided on the connecting pipe (4).

4. The sulfuric acid tail gas condensation and recovery device according to claim 2, characterized in that: The condenser cylinder (301) is provided with an exhaust pipe (6), and the exhaust pipe (6) is provided with a hollow fiber membrane separator (7).

5. The sulfuric acid tail gas condensation and recovery device according to claim 1, characterized in that: A heater (8) is fixedly installed on the lower surface of the condenser (1), and a discharge pipe (9) is provided on one side of the condenser (1).

6. The sulfuric acid tail gas condensation and recovery device according to claim 1, characterized in that: A temperature sensor (10) is fixedly installed inside the condenser (1).

7. The sulfuric acid tail gas condensation and recovery device according to claim 1, characterized in that: The lower surface of the condenser (1) is fixedly provided with two support legs (11) arranged symmetrically.

8. A sulfuric acid tail gas condensation and recovery device according to claim 2, characterized in that: The condenser (1) and condenser cylinder (301) are made of stainless steel.

Images