Rapid desulfurization, dust removal and sublimed sulfur recovery system for sulfur melting tank

Abstract

The utility model belongs to the technical field of dust removal devices, and relates to a rapid sulfur melting tank desulfurization, dust removal and sublimed sulfur recovery system, which comprises a spray tower, a water pump, a fan, a circulating tank and a buffer tank, an air inlet of the spray tower is connected to the upper part of the rapid sulfur melting tank through an air inlet pipeline, the spray tower adopts an empty tower for spraying and is provided with three spray layers positioned above the air inlet, and the water pump is connected with the circulating tank. A circulating water pipeline is arranged at the bottom of the spray tower, an outlet of the circulating water pipeline is connected to a circulating tank, a water outlet filtering assembly is arranged in the circulating tank, a spray pipe connected to the spray layer is arranged at the bottom of the water outlet end of the circulating tank, a water pump is arranged on the spray pipe, and a tail gas discharge pipe of the spray tower is connected and extends to the bottom of an inner cavity of the buffer tank. The top of the buffer tank is connected to a fan through an exhaust pipe, and a cooling assembly is arranged on the buffer tank. According to the device, the treatment effect of dust in tail gas of the rapid sulfur melting tank is improved, the device maintenance amount is reduced, the production environment is improved, and meanwhile the recovery rate of sulfur and water resources is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal devices, in particular to a fast sulfur melting tank desulfurization, dust removal and sulfur recovery and sublimation system. Background Art

[0002] In the sulfur acid production process, solid sulfur needs to be melted into liquid sulfur (melting point of solid sulfur is 119℃) in a fast sulfur melting tank and sent to the sulfur incinerator for combustion. During the melting of solid sulfur in the fast sulfur melting tank, sulfur particles are conveyed by belts, and sulfur dioxide-containing gas will be emitted. If it is not treated, it will pollute the environment and affect the health of workers, and sulfur dust and sublimated sulfur will cause certain economic losses. Therefore, it is necessary to treat the tail gas by spraying to meet the environmental protection requirements of sulfur dioxide and sulfur dust, and to recycle sulfur.

[0003] The existing tail gas spray treatment device is to set a pipeline connected to the spray tower above the fast sulfur melting tank, and replace the fan to pump the exhaust gas in the fast sulfur melting tank to the spray tower through pressure changes, and then wash it with alkali solution in the spray tower before discharging. The current tail gas spray treatment device has the following defects:

[0004] 1. The packing layer designed in the spray tower, and only one spray layer above the packing layer, can easily cause sulfide particles to block the packing during operation, and removing the packing will cause the particulate matter in the tail gas to exceed the standard;

[0005] 2. The sulfur in the regeneration liquid will clog the circulation pump, which will cause the nozzles of the spray layer to be clogged, requiring frequent manual cleaning;

[0006] 3. The pressure difference effect is not as ideal as that of the fan. It is greatly affected by the temperature of the molten sulfur steam, and the exhaust effect is not good, causing the molten sulfur plant to be filled with steam.

[0007] Therefore, it is necessary to develop a rapid sulfur melting tank desulfurization, dust removal, sulfur recovery and sublimation system in this field to solve the above technical problems. Utility Model Content

[0008] The main purpose of the utility model is to provide a rapid sulfur melting tank desulfurization, dust removal, recovery and sublimation sulfur system to solve the technical problems mentioned in the background technology.

[0009] In order to achieve the above-mentioned purpose, the utility model is implemented according to the following technical scheme:

[0010] A system for desulfurization, dust removal and recovery of sublimated sulfur in a fast sulfur melting tank comprises a spray tower, a water pump, a fan, a circulation tank and a buffer tank, wherein the air inlet of the spray tower is connected to the top of the fast sulfur melting tank through an air inlet pipe, the spray tower adopts empty tower spraying, and three spray layers located above the air inlet are arranged in the spray tower, a circulating water pipeline is arranged at the bottom of the spray tower, the outlet of the circulating water pipeline is connected to the circulation tank, a water outlet filter assembly is arranged in the circulation tank, a spray pipe connected to the spray layer is arranged at the bottom of the water outlet end of the circulation tank, a water pump is arranged on the spray pipe, an exhaust gas discharge pipe of the spray tower is connected to and extends to the bottom of the inner cavity of the buffer tank, the top of the buffer tank is connected to the fan through an exhaust pipe, the outlet of the fan is connected to a chimney, a cooling assembly is arranged on the buffer tank, and a sewage pipe is arranged at the bottom of the buffer tank, the sewage pipe is connected to the water inlet end of the circulation tank, and a stop valve is arranged on the sewage pipe.

[0011] Preferably, the outlet water filter assembly includes a partition and a filter gauze, the partition is arranged in the circulation tank and is used to separate the circulation tank into a sedimentation tank and a circulation tank, and an overflow port is reserved at the upper end of the partition, and a filter gauze is arranged in the overflow port, the sedimentation tank is arranged at the water inlet end of the circulation tank, and the circulation tank is arranged at the water outlet end of the circulation tank. By overflow sedimentation and filtration, the sulfur solids in the effluent of the spray tower are separated in the sedimentation tank, and by regularly collecting the sulfur in the sedimentation tank, the sulfur is reused in the rapid sulfur melting tank, thereby improving the utilization rate of resources.

[0012] Preferably, a water supply pipe and an alkali adding pipe are arranged above the circulation pool. The circulation pool configures an alkali desulfurization liquid with a pH value greater than 10 by adding primary water and alkali solution, and a certain amount of alkali solution is added when the pH value is less than 10.

[0013] Preferably, the cooling assembly includes a cooling jacket wrapped around the outside of the buffer tank, the upper end of the cooling jacket is provided with a cooling water outlet, and the lower end is provided with a cooling water inlet. Through external cooling water, the spray tower tail gas entering the buffer tank can be cooled to further remove sublimated sulfur (sulfur vapor > 119°C) and moisture in the gas.

[0014] Preferably, the fan is driven by a variable frequency motor, and the air extraction volume of the fan can be controlled by adjusting the frequency of the variable frequency motor.

[0015] The utility model also includes other components that enable it to be used normally, and these components all adopt conventional technical means in the field. In addition, the devices and components not limited in the utility model all adopt conventional technical means in the field, such as fast sulfur melting tank, spray tower, spray layer, water pump, fan, chimney, etc. In the specific implementation process, the field can select appropriate equipment or component models according to the specific working scene.

[0016] The working principle of the utility model is as follows: the waste gas generated in the rapid sulfur melting tank enters the spray tower under the suction action of the fan, and the alkali solution absorbs the sulfur dioxide in the waste gas, and at the same time, the sulfur dust and sublimated sulfur in the waste gas are washed or condensed, and the sublimated sulfur and part of the water vapor remaining in the tail gas at the outlet of the spray tower are further condensed and separated in the buffer tank, and the residual tail gas is discharged into the chimney through the exhaust fan. After the mixture of sulfur and water condensed in the buffer tank is accumulated to a certain extent, the stop valve on the sewage pipe is opened to discharge the mixture of sulfur and water in the buffer tank into the circulation pool, so as to realize the recycling of water resources and sulfur.

[0017] Compared with the prior art, the beneficial effects of the utility model are: improving the dust control effect in the tail gas of the rapid sulfur melting tank, reducing the maintenance of the spray layer and the water pump, improving the production environment of the sulfur melting plant, and at the same time improving the recovery rate of sulfur and water resources in the process of tail gas treatment in the rapid sulfur melting tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 for Figure 1 A-section structure enlarged schematic diagram. DETAILED DESCRIPTION

[0020] The present invention is further described below with reference to specific embodiments and in conjunction with the accompanying drawings. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0021] Example

[0022] like Figures 1-2As shown, this embodiment proposes a rapid sulfur melting tank desulfurization, dust removal, and sublimation sulfur recovery system, including a spray tower 1, a water pump 2, a fan 3, a circulation tank 4, and a buffer tank 5. The air inlet of the spray tower is connected to the top of the rapid sulfur melting tank 7 through an air inlet pipe 6. The spray tower adopts empty tower spraying, and three spray layers 8 located above the air inlet are provided in the spray tower, and a demister 25 is also provided above the spray layer in the spray tower. A circulating water pipeline 9 is provided at the bottom of the spray tower, and the outlet of the circulating water pipeline is connected to the circulation tank. A water outlet filter assembly is provided in the circulation tank. A spray pipe 10 connected to the spray layer is provided at the bottom of the water outlet of the circulation tank, and a water pump is provided on the spray pipe. The exhaust pipe 11 of the spray tower is connected to and extends to the bottom of the inner cavity of the buffer tank. The top of the buffer tank is connected to the fan through an exhaust pipe 12, and the outlet of the fan is connected to a chimney 13. A cooling assembly is provided on the buffer tank, and a sewage pipe 14 is provided at the bottom of the buffer tank, which is connected to the water inlet of the circulation tank, and a stop valve 15 is provided on the sewage pipe. The fan is driven by a variable frequency motor, and the fan exhaust volume can be controlled by adjusting the frequency of the variable frequency motor.

[0023] Specifically, the outlet water filter assembly includes a partition 16 and a filter screen 17, the partition is arranged in the circulation tank and is used to separate the circulation tank into a sedimentation tank 18 and a circulation tank 19, and an overflow port is reserved at the upper end of the partition, and a filter screen is arranged in the overflow port, the sedimentation tank is arranged at the water inlet end of the circulation tank, and the circulation tank is arranged at the water outlet end of the circulation tank. By overflow sedimentation and filtration, the sulfur solids in the effluent of the spray tower are separated in the sedimentation tank, and the sulfur in the sedimentation tank is regularly collected, so that the sulfur is reused in the rapid sulfur melting tank, thereby improving the utilization rate of resources.

[0024] More specifically, a water supply pipe 20 and an alkali adding pipe 21 are arranged above the circulation pool. The circulation pool configures an alkali desulfurization liquid with a pH value greater than 10 by adding primary water and alkali solution. When the pH value is less than 10, a certain amount of alkali solution is added.

[0025] In this embodiment, the cooling assembly includes a cooling jacket 22 wrapped around the outside of the buffer tank. The upper end of the cooling jacket is provided with a cooling water outlet 23, and the lower end is provided with a cooling water inlet 24. Through external cooling water, the spray tower tail gas entering the buffer tank can be cooled to further remove sublimated sulfur (sulfur vapor >119°C) and moisture in the gas.

[0026] The working principle of the utility model is as follows: the waste gas generated in the rapid sulfur melting tank enters the spray tower under the suction action of the fan, and the alkali solution absorbs the sulfur dioxide in the waste gas, and at the same time, the sulfur dust and sublimated sulfur in the waste gas are washed or condensed, and the sublimated sulfur and part of the water vapor remaining in the tail gas at the outlet of the spray tower are further condensed and separated in the buffer tank, and the residual tail gas is discharged into the chimney through the exhaust fan. After the mixture of sulfur and water condensed in the buffer tank is accumulated to a certain extent, the stop valve on the sewage pipe is opened to discharge the mixture of sulfur and water in the buffer tank into the circulation pool, so as to realize the recycling of water resources and sulfur.

[0027] The technical solution of the present utility model is not limited to the above-mentioned specific embodiments, and all technical variations made according to the technical solution of the present utility model fall within the protection scope of the present utility model.

Claims

1. A fast sulfur melting tank desulfurization, dust removal, and sulfur recovery sublimation system, comprising a spray tower, a water pump, and a fan, wherein the air inlet of the spray tower is connected to the top of the fast sulfur melting tank through an air inlet pipeline, characterized in that: It also includes a circulation tank and a buffer tank. The spray tower adopts empty tower spraying, and the spray tower is provided with three spray layers located above the air inlet. A circulating water pipeline is provided at the bottom of the spray tower, and the outlet of the circulating water pipeline is connected to the circulation tank. A water outlet filter assembly is provided in the circulation tank. A spray pipe connected to the spray layer is provided at the bottom of the water outlet end of the circulation tank. A water pump is provided on the spray pipe. The exhaust gas discharge pipe of the spray tower is connected and extends to the bottom of the inner cavity of the buffer tank. The top of the buffer tank is connected to the fan through an exhaust pipe. The outlet of the fan is connected to a chimney. A cooling assembly is provided on the buffer tank, and a sewage pipe is provided at the bottom of the buffer tank. The sewage pipe is connected to the water inlet end of the circulation tank, and a stop valve is provided on the sewage pipe.

2. A rapid sulfur melting tank desulfurization, dust removal, and sulfur recovery and sublimation system according to claim 1, characterized in that: The water outlet filter assembly includes a partition and a filter mesh. The partition is arranged in the circulation tank and is used to separate the circulation tank into a sedimentation tank and a circulation tank. An overflow port is reserved at the upper end of the partition. A filter mesh is arranged in the overflow port. The sedimentation tank is arranged at the water inlet end of the circulation tank, and the circulation tank is arranged at the water outlet end of the circulation tank.

3. A fast sulfur melting tank desulfurization, dust removal and sulfur recovery sublimation system according to claim 2, characterized in that: A water supply pipe and an alkali adding pipe are arranged above the circulation pool.

4. A rapid sulfur melting tank desulfurization, dust removal, and sulfur recovery and sublimation system according to claim 1, characterized in that: The cooling assembly comprises a cooling jacket wrapped around the outside of the buffer tank, wherein the upper end of the cooling jacket is provided with a cooling water outlet, and the lower end of the cooling jacket is provided with a cooling water inlet.

5. A rapid sulfur melting tank desulfurization, dust removal, and sulfur recovery and sublimation system according to claim 1, characterized in that: The fan is driven by a variable frequency motor.

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