Device for absorbing sulfur dioxide in waste gas of tube bundle dryer

Abstract

The utility model discloses a device for absorbing sulfur dioxide in waste gas of a tube bundle dryer. The device mainly comprises an absorption tower, a gas inlet pipe, a gas outlet pipe, a liquid inlet pipe, a liquid outlet pipe, a distributor, a water collector, an induced draft fan, a baffle plate, a sulfurous acid concentration detector, a centrifugal pump, a water replenishing valve, a discharge outlet and a liquid level meter. According to the absorption principle, the problem that the content of sulfur dioxide in discharged waste gas is high is solved through a countercurrent flow heat exchange absorption method, the environment is protected, meanwhile, the purposes of reducing consumption and improving efficiency are achieved, and sulfur consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of corn starch production tail gas treatment, and directly relates to a device for absorbing sulfur dioxide in pipe bundle dryer waste gas. BACKGROUND

[0002] At present, in the process of starch production, the drying of by-products such as germ, fiber and protein powder still adopts pipe bundle drying machine, which causes the pollution of external environment and the consumption of alkali liquor due to the direct discharge of waste gas from the pipe bundle drying machine without treatment or the treatment of waste gas from the pipe bundle drying machine by alkali washing tower in some enterprises; meanwhile, the content of sulfur dioxide in waste gas discharged by the starch industry is high, and the consumption of sulfur can be reduced by collecting the waste gas through a method, so it is necessary to study a device for absorbing sulfur dioxide in pipe bundle dryer waste gas. SUMMARY

[0003] The utility model discloses a device for absorbing sulfur dioxide in pipe bundle dryer waste gas.

[0004] The utility model discloses a device for absorbing sulfur dioxide in pipe bundle dryer waste gas, which mainly comprises an absorption tower 1, an air inlet pipe 2, an air outlet pipe 3, a liquid inlet pipe 4, a deflector 5, a distributor 6, a water collector 7, a draught fan 8, a liquid outlet pipe 9, a sulfurous acid concentration detector 10, a centrifugal pump 11, a water replenishing valve 12, a discharge port 13 and a liquid level meter 14. BRIEF DESCRIPTION OF DRAWINGS

[0005] The utility model discloses a device for absorbing sulfur dioxide in pipe bundle dryer waste gas. Figure 1 The utility model discloses a device for absorbing sulfur dioxide in pipe bundle dryer waste gas.

[0006] The utility model discloses a device for absorbing sulfur dioxide in pipe bundle dryer waste gas. Figure 1 The utility model discloses a device for absorbing sulfur dioxide in pipe bundle dryer waste gas. DETAILED DESCRIPTION

[0007] The utility model discloses a kind of absorption tower, gas inlet pipe, gas outlet pipe, liquid inlet pipe, baffle, distributor, water collector, induced draft fan, liquid outlet pipe, sulfurous acid concentration detector, centrifugal pump, water replenishing valve, discharge port and liquid level meter. Figure 1 The utility model discloses a kind of absorption tower, gas inlet pipe, gas outlet pipe, liquid inlet pipe, baffle, distributor, water collector, induced draft fan, liquid outlet pipe, sulfurous acid concentration detector, centrifugal pump, water replenishing valve, discharge port and liquid level meter.

[0008] A kind of absorption tower, gas inlet pipe, gas outlet pipe, liquid inlet pipe, baffle, distributor, water collector, induced draft fan, liquid outlet pipe, sulfurous acid concentration detector, centrifugal pump, water replenishing valve, discharge port and liquid level meter.

[0009] Working principle: the utility model uses counterflow heat exchange to absorb sulfur dioxide in waste gas.Liquid inlet pipe 4 is evenly distributed to baffle 5 by distributor 6, sulfur dioxide-containing waste gas with temperature of 60-70 DEG C is introduced into absorption tower 1 from gas inlet pipe 2, and is contacted with liquid from bottom to top by baffle 5, and the purified gas is extracted by induced draft fan 8 to the atmosphere through water collector 7 and gas outlet pipe 3.Liquid after absorbing sulfur dioxide and heat exchange is discharged through liquid outlet pipe 9, and the concentration is controlled to be ≤0.06% after online analysis by sulfurous acid concentration detector 10, when the liquid concentration displayed on sulfurous acid concentration detector 10 is >0.06%, open the valve on discharge port 13, open water replenishing valve 12 to supplement fresh water to the system, and the acid-containing liquid discharged from discharge port 13 is used for acid-making post;When the liquid concentration displayed on sulfurous acid concentration detector 10 is <0.06%, close water replenishing valve 12, close discharge port 13, and the liquid is circulated.

[0010] Liquid level meter 14 is used to observe the liquid level of absorption tower 1, prevent liquid seal from being caused to the outlet of gas inlet pipe 2 due to too high liquid level, and affect absorption effect.

[0011] Water collector 7 prevents small water droplets in gas from being carried out of tower, reduces waste of water resources, protects environment, and prevents acid gas in water mist from polluting atmosphere.

[0012] The utility model has the advantages of solving the problem of high sulfur dioxide content in exhaust gas, protecting environment, achieving the purposes of reducing consumption and increasing efficiency, and reducing sulfur consumption after discharging liquid with high concentration.

Claims

1. A device for absorbing sulfur dioxide in the exhaust gas of a tube bundle dryer, mainly comprising an absorption tower (1), an inlet pipe (2), an outlet pipe (3), a liquid inlet pipe (4), a baffle plate (5), a distributor (6), a water collector (7), an induced draft fan (8), a liquid outlet pipe (9), a sulfurous acid concentration detector (10), a centrifugal pump (11), a water supply valve (12), a discharge port (13), and a level gauge (14), characterized in that, The inlet pipe (2) is located at the bottom of the absorption tower (1), the outlet pipe (3) is located at the top of the absorption tower (1), the liquid inlet pipe (4) is located on one side of the upper part of the absorption tower (1), and the liquid outlet pipe (9) is located on one side of the lower part of the absorption tower (1). The inlet pipe (4) and the liquid outlet pipe (9) are connected by a centrifugal pump (11). A sulfurous acid concentration detector (10) is installed on the liquid outlet pipe (9). The outlet pipe (3) is connected to the induced draft fan (8). The water supply valve (12) is connected to the inlet pipe (4). The discharge port (13) is located at the bottom of the absorption tower (1). The level gauge (14) is installed at the bottom of the absorption tower (1).

2. The apparatus for absorbing sulfur dioxide in the exhaust gas of a tube bundle dryer according to claim 1, characterized in that, The baffle (5), distributor (6), and water collector (7) are all installed inside the absorption tower (1).

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