Sulfur granulation tail gas treatment system

Abstract

The utility model relates to the technical field of waste gas treatment, and discloses a sulfur granulation tail gas treatment system which comprises a first induced draft fan, a bag-type dust collector, a desulfurization tank and an activated carbon adsorption tank, a gas inlet of the bag-type dust collector is communicated with a gas outlet of the first induced draft fan through a second flange and a second pipeline, a gas inlet of the desulfurization tank is communicated with a gas outlet of the bag-type dust collector through a third flange and a third pipeline and used for removing hydrogen sulfide in waste gas, and the gas inlet is communicated with a gas outlet of the desulfurization tank through a fourth flange and a fourth pipeline and used for removing hydrogen sulfide in the waste gas. The device is used for adsorbing and deodorizing waste gas. According to the device, a series of process treatments such as dust removal and desulfurization can be carried out on the tail gas of sulfur granulation, so that standard emission of the tail gas of the sulfur granulator is met, and a large amount of sulfur dust and harmful gases such as hydrogen sulfide are prevented from being generated on site during long-time operation of the sulfur granulator.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a sulfur granulation tail gas treatment system. Background Art

[0002] When recovering sulfur atoms from the air, partial combustion and the Claus process are usually used to convert hydrogen sulfide in the acid gas into liquid sulfur. The liquid sulfur is then transported to the sulfur granulator and continuously and evenly fed into the granulator's distribution spraying mechanism for spraying the liquid sulfur. The existing distribution spraying mechanism is a cylindrical structure with a porous outer wall and a jacketed tube inside. When liquid sulfur is fed into the nozzle of the distribution spraying mechanism through a liquid sulfur delivery pump, the nozzle sprays the liquid sulfur into the granulator's distributor. Due to the relatively high viscosity of liquid sulfur, the liquid sulfur passes through the holes in the distributor and is distributed in small droplets on the granulator's steel belt. The back of the steel belt is cooled by continuous heat exchange with cooling water, so that the liquid sulfur on the steel belt is gradually cooled and eventually cooled into sulfur granules for packaging and storage.

[0003] However, during the operation of the sulfur granulator, when the molten liquid sulfur is sprayed onto the steel belt through the distribution mechanism, a small amount of sulfur in the molten liquid sulfur evaporates to produce sulfur dust. At the same time, a small amount of hydrogen sulfide gas dissolved in the liquid sulfur is decomposed and discharged together with the sulfur dust through the induced draft fan on the top of the granulator. When the discharge continues, it will cause the sulfur dust to accumulate at the exhaust induced draft fan outlet of the sulfur granulator and be accompanied by a strong odor and hydrogen sulfide gas, which will undoubtedly threaten the health of the workers. Utility Model Content

[0004] The utility model provides a sulfur granulation tail gas treatment system. The device can realize a series of process treatments such as dust removal and desulfurization on the tail gas of sulfur granulation to meet the emission standards of the tail gas of the sulfur granulator and avoid the generation of a large amount of sulfur dust, strong odor and harmful gases such as hydrogen sulfide on site during the long-term operation of the sulfur granulator.

[0005] The utility model provides a sulfur granulation tail gas treatment system, comprising: a first induced draft fan, a bag dust collector, a desulfurization tank, and an activated carbon adsorption tank. The air inlet of the first induced draft fan is connected to the exhaust port of the sulfur granulator through a first flange and a first pipeline, the air inlet of the bag dust collector is connected to the exhaust port of the first induced draft fan through a second flange and a second pipeline, the air inlet of the desulfurization tank is connected to the exhaust port of the bag dust collector through a third flange and a third pipeline, and is used for removing hydrogen sulfide in the exhaust gas, and the air inlet is connected to the air outlet of the desulfurization tank through a fourth flange and a fourth pipeline, and is used for adsorbing and deodorizing the exhaust gas.

[0006] Preferably, the desulfurization tank includes a tank body and a desulfurizer filled in the tank body, the air inlet of the tank body is located on the bottom side of the tank, and the air outlet is located on the top side of the tank, and the tank body is provided with a filter at the position of its air outlet.

[0007] Preferably, the desulfurizing agent is zinc oxide powder.

[0008] Preferably, a feeding port is provided on the top of the tank body, and a cleaning port is provided on the bottom of the tank body, and both the feeding port and the cleaning port are equipped with a blocking cover.

[0009] Preferably, the air outlet of the activated carbon adsorption tank is connected to the second induced draft fan through a fifth pipeline.

[0010] Preferably, the air outlet of the second induced draft fan is connected to a discharge pipe, and the air outlet of the discharge pipe extends upward.

[0011] Compared with the prior art, the beneficial effect of the present invention is that the first induced draft fan inlet provided in the device can seal and connect the exhaust port of the sulfur granulator through the first pipeline. Specifically, a flange or the like can be used to achieve a detachable sealed connection, which can be easy to install and disassemble, and the dust and harmful gases discharged from the sulfur granulator can be conveyed to the bag dust collector through pressurization. The bag dust collector can efficiently collect sulfur dust in the air, and the desulfurization tank can be used to desulfurize and purify the gas after dust removal, so that the harmful hydrogen sulfide gas can be eliminated as much as possible to ensure the safe discharge of waste gas. In summary, the present device can realize a series of process treatments such as dust removal and desulfurization of the tail gas of sulfur granulation to meet the emission standards of the tail gas of the sulfur granulator and avoid the generation of a large amount of sulfur dust and harmful gases such as hydrogen sulfide on site during the long-term operation of the sulfur granulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic flow chart of a sulfur granulation tail gas treatment system provided in an embodiment of the present utility model;

[0013] Figure 2 This is a structural schematic diagram of a tank body in a sulfur granulation tail gas treatment system provided by an embodiment of the utility model.

[0014] Description of reference numerals:

[0015] 1. First induced draft fan; 2. First pipeline; 3. Sulfur granulator; 4. Bag filter; 5. Second pipeline; 6. Desulfurization tank; 61. Tank body; 611. Filter; 62. Feeding port; 63. Cleaning port; 64. Sealing cover; 7. Third pipeline; 8. Activated carbon adsorption tank; 9. Fourth pipeline; 10. Second induced draft fan; 11. Fifth pipeline. DETAILED DESCRIPTION

[0016] A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] refer to Figure 1 The utility model provides a sulfur granulation tail gas treatment system, comprising: a first induced draft fan 1, a bag-type dust collector 4, a desulfurization tank 6, and an activated carbon adsorption tank 8. The air inlet of the first induced draft fan 1 is connected to the exhaust port of the sulfur granulator 3 through a first flange and a first pipeline 2, the air inlet of the bag-type dust collector 4 is connected to the exhaust port of the first induced draft fan 1 through a second flange and a second pipeline 5, the air inlet of the desulfurization tank 6 is connected to the exhaust port of the bag-type dust collector 4 through a third flange and a third pipeline 7, and is used to remove hydrogen sulfide in the exhaust gas. The air inlet of the activated carbon adsorption tank 8 is connected to the air outlet of the desulfurization tank 6 through a fourth flange and a fourth pipeline 9, and is used to adsorb and deodorize the exhaust gas.

[0019] In the above embodiment, the air inlet of the first induced draft fan 1 provided in the device can be sealed and connected to the exhaust port of the sulfur granulator 3 through the first pipe 2. Specifically, a flange or the like can be used to achieve a detachable sealed connection, which can be easy to install and disassemble, and the dust and harmful gases discharged from the sulfur granulator 3 can be transported to the bag-type dust collector 4 through pressurization. The provided bag-type dust collector 4 can achieve the effect of efficiently collecting sulfur dust in the air. Preferably, the bag-type dust collector is limited to using a bag-type dust collector 4 with a vibration function, which can use a mechanical device or a pneumatic device to vibrate the filter bag, so that the particles attached to the filter bag fall off quickly, and the filter bag restores the function of capturing solid particles in the gas, so that the overall effect of the dust cleaning of the device is improved. Specifically, when the pressure difference of the bag-type dust collector is high, the dust cleaning and blowing nitrogen valve is opened, and the dust is cleaned. The bag is purged to make the bag shrink and swell and shake to achieve dust cleaning, so that the particulate matter attached to the outside of the bag falls off and is collected at the cleaning port, and the internal sulfur dust is discharged through the cleaning port. The desulfurization tank 6 is set to achieve desulfurization and purification of the gas after dust removal, so that the harmful gas of hydrogen sulfide is eliminated as much as possible to ensure the safe discharge of exhaust gas. The activated carbon adsorption tank 8 is set to achieve the effect of purifying and adsorbing the odor or odor in the gas discharged from the outlet of the desulfurization tank 6. Its main adsorption component is the activated carbon adsorption carbon plate, which is specifically set at the position where the gas must pass in the tank. In summary, this device can realize a series of process treatments such as dust removal and desulfurization of the tail gas of sulfur granulation to meet the emission standards of the tail gas of the sulfur granulator 3 and avoid the generation of a large amount of sulfur dust and harmful gases such as hydrogen sulfide on site during the long-term operation of the sulfur granulator 3.

[0020] Further, refer to Figure 1 and Figure 2 The desulfurization tank 6 includes a tank body 61 and a desulfurizer filled in the tank body 61. The air inlet of the tank body 61 is located on the bottom side of the tank, and the air outlet is located on the top side. The tank body 61 is provided with a filter 611 at the position of its air outlet.

[0021] In the above embodiments, the tank bottom is elevated and supported by support structures such as grid plates.

[0022] Further, refer to Figure 1 , the desulfurizer is zinc oxide powder.

[0023] In the above embodiment, the desulfurization agent filled in the desulfurization tank 6 is mainly zinc oxide, and the hydrogen sulfide in the exhaust gas reacts with zinc oxide to form zinc sulfide, thereby achieving a better absorption effect of hydrogen sulfide gas. The main chemical reaction is: ZnO+H2S→ZnS+H2O

[0024] Further, refer to Figure 2A feeding port 62 is provided on the top of the tank body 61 , and a cleaning port 63 is provided on the bottom. Both the feeding port 62 and the cleaning port 63 are equipped with a blocking cover 64 .

[0025] In the above embodiment, the feeding port 62 is provided to facilitate the addition of zinc oxide powder to the tank body 61, or to fill it with water for maintenance, and the cleaning port 63 is provided to discharge the precipitated powder and water after the reaction. The sealing cover 64 is provided to achieve the effect of sealing the feeding port 62 and the cleaning port 63. The specific sealing method is not further limited in this device.

[0026] Further, refer to Figure 1 The air outlet of the activated carbon adsorption tank 8 is connected to the second induced draft fan 10 through the fifth pipeline 11.

[0027] In the above embodiment, the second induced draft fan 10 can further provide the activated carbon adsorption tube with negative pressure suction kinetic energy, so that the exhaust gas can pass through the activated carbon plate faster and more effectively, thereby improving the deodorization efficiency.

[0028] Further, refer to Figure 1 The air outlet of the second induced draft fan 10 is connected to a discharge pipe, and the air outlet of the discharge pipe extends upward.

[0029] In the above embodiments, the treated waste gas can be discharged to high altitude through the exhaust pipe.

[0030] In summary, this device can comprehensively ensure the normal operation of the granulation process of the existing sulfur granulator 3, and realize dust removal, desulfurization, deodorization and other process treatments on the tail gas of sulfur granulation to meet the emission standards of the tail gas of the sulfur granulator 3, and avoid the generation of a large amount of dust, harmful gases and odor on site during the long-term operation of the sulfur granulator 3.

[0031] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A sulfur granulation tail gas treatment system, characterized in that: include: A first induced draft fan (1), the air inlet of which is connected to the exhaust port of the sulfur granulator (3) through a first flange and a first pipeline (2); A bag dust collector (4), the air inlet of which is connected to the exhaust port of the first induced draft fan (1) through a second flange and a second pipeline (5); A desulfurization tank (6), the air inlet of which is connected to the exhaust port of the bag filter (4) through a third flange and a third pipeline (7), and is used to remove hydrogen sulfide in the exhaust gas; The activated carbon adsorption tank (8) has an air inlet connected to the air outlet of the desulfurization tank (6) through a fourth flange and a fourth pipeline (9), and is used for adsorbing and deodorizing the exhaust gas.

2. A sulfur granulation tail gas treatment system according to claim 1, characterized in that: The desulfurization tank (6) comprises a tank body (61) and a desulfurizer filled in the tank body (61). The air inlet of the tank body (61) is located on the bottom side of the tank, and the air outlet is located on the top side of the tank. The tank body (61) is provided with a filter (611) at the position of the air outlet.

3. A sulfur granulation tail gas treatment system according to claim 2, characterized in that: The desulfurizing agent is zinc oxide powder.

4. A sulfur granulation tail gas treatment system according to claim 2 or 3, characterized in that: The tank body (61) is provided with a feeding port (62) on the top and a cleaning port (63) on the bottom. Both the feeding port (62) and the cleaning port (63) are equipped with a blocking cover (64).

5. The sulfur granulation tail gas treatment system according to claim 1, characterized in that: The air outlet of the activated carbon adsorption tank (8) is connected to the second induced draft fan (10) via a fifth pipeline (11).

6. A sulfur granulation tail gas treatment system according to claim 5, characterized in that: The air outlet of the second induced draft fan (10) is connected to a discharge pipe, and the air outlet of the discharge pipe extends upward.

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