CN211538898U - Sulfur-containing waste gas collecting device and treatment system for liquid sulfur storage tank - Google Patents
Sulfur-containing waste gas collecting device and treatment system for liquid sulfur storage tank Download PDFInfo
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- CN211538898U CN211538898U CN201921800051.7U CN201921800051U CN211538898U CN 211538898 U CN211538898 U CN 211538898U CN 201921800051 U CN201921800051 U CN 201921800051U CN 211538898 U CN211538898 U CN 211538898U
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Abstract
The utility model relates to a liquid sulphur storage tank contains sulphur waste gas collection device and treatment system. The sulfur-containing waste gas collecting device of the liquid sulfur storage tank comprises a gas collecting hood and a sulfur receiving plate arranged below the gas collecting hood, wherein the gas collecting hood is used for covering above an escape pipe of the liquid sulfur storage tank, an escape pipe perforation corresponding to the escape pipe is arranged on the sulfur receiving plate, and the upper surface of the sulfur receiving plate is in clearance fit with a hood opening of the gas collecting hood. The sulfur-containing waste gas treatment system of the liquid sulfur storage tank comprises a gas collecting hood, a sulfur receiving plate arranged below the gas collecting hood, a water washing device connected with the gas collecting hood, an alkali washing device connected with the water washing device and a recovery device, wherein the recovery device is used for recovering elemental sulfur insoluble in water after water washing. The sulfur-containing waste gas collection and treatment system of the liquid sulfur storage tank can avoid the risk of overpressure of the liquid sulfur storage tank, and the safety is high.
Description
Technical Field
The utility model belongs to the technical field of contain acidic waste gas treatment such as hydrogen sulfide, elemental sulfur steam, sulphur powder, concretely relates to liquid sulfur storage tank contains sulphur waste gas collection device and governing system.
Background
The common sources of industrial sulfur mainly include natural sulfur ore, pyrite, recovery of sulfur-containing tail gas, etc., wherein the recovery of sulfur-containing tail gas is the main source, and the Claus sulfur recovery process is generally adopted. The industrial solid sulfur generally begins to melt at about 119 ℃, the viscosity of liquid sulfur sharply increases when the industrial solid sulfur is continuously heated to 159 ℃, and the state of elemental sulfur molecules is S along with the temperature rise8、S6、S2The structure of the liquid sulfur is changed, and the physical parameters of the liquid sulfur, such as surface tension, viscosity, density and the like, are changed along with the change. The flash point of sulfur is 207 ℃ and the boiling point is 444.6 ℃.
The sulfur is generally matched with and built with a liquid sulfur storage device in the production and sale processes, and the common liquid sulfur storage device is provided with a liquid sulfur storage tank, a storage tank and a liquid sulfur pool for temporarily storing liquid sulfur products. Liquid sulfur storage tanks are typically of atmospheric design, with the roof vented to atmosphere through a spill pipe. In order to maintain the pressure in the tank and prevent oxygen from entering the tank, a small amount of nitrogen is often supplemented into the tank through a pressure control valve in the discharge state of the tank. As the liquid sulfur has the best fluidity in the range of 135 ℃ to 145 ℃, the storage and delivery system of the liquid sulfur usually adopts steam tracing, and controls the temperature to be 135-145 ℃ and the temperature of the top gas phase space to be 110-130 ℃.
Liquid sulfur, influenced by the sulfur recovery process, typically contains trace amounts of H2S、SO2In the process of storage and transportation, the volatile liquid volatilizes from the liquid phase along with the fluctuation of parameters such as pressure, temperature and the like, and then the volatile liquid is dissipated into the gas phase space and then into the atmosphere. The waste gas of the liquid sulfur storage tank comprises H2S、SO2The sulfur-containing gas comprises elemental sulfur, nitrogen and the like, wherein the elemental sulfur exists in two forms of liquid drops and solid sulfur powder according to different temperatures. For large liquid sulfur storage tanks, the volume of the escaping gas is generally 500-800Nm3Perh, up to 2000Nm during loading and unloading3/h，H2The S content is about 800-1200mg/Nm3. The waste gas corrodes liquid sulfur storage equipment and facilities, causes atmospheric environmental pollution at the same time, harms the physical health and personal safety of surrounding operating personnel, causes diseases of respiratory system, digestive system, reproductive system and the like, can cause pathological changes of organisms and even cancers, and governs the waste gas dissipated by a liquid sulfur system.
In view of the above situation, the chinese utility model patent with the publication number CN205590290U discloses a degassing device for a liquid sulfur storage tank, which comprises a sulfur seal tank, a water scrubber, a cooling pipe, a sulfur powder filter, a water circulating pump, an alkaline washing reactor, an alkaline solution tank, an alkaline residue tank, a liquid ring vacuum pump, an alkaline solution pump, a blow-off pipe and other devices; wherein import in the middle part of sulphur seal tank top exit linkage washing tower, washing tower upper portion is provided with the shower head, the cooling tube sets up in the washing tower lower part, the sulphur powder filter is connected to the washing tower bottom, the shower head is connected through the water circulating pump in the export of sulphur powder filter, the waste gas that desulphurization reactor was connected to washing tower top branch export is through the trachea, desulphurization reactor's waste gas outlet passes through liquid ring vacuum pump connection and diffuses the pipe, desulphurization reactor's bottom sets up the alkali lye export, the alkali lye exit is connected with the lye pump through first valve, the lye pump is connected through the second valve to the lye tank. The process of the liquid sulfur storage tank desulfurization device is complex, the cost is high, the liquid sulfur storage tank is sealed by a sulfur sealing tank, the overpressure risk still exists in the operation process, the liquid sulfur storage tank is easy to explode due to overpressure, and the safety is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sulfur-containing waste gas collecting device for a liquid sulfur storage tank, which solves the technical problems that the existing sulfur storage tank desulfurizing device is easy to cause the risk of overpressure of the liquid sulfur storage tank and the safety is lower; an object of the utility model is to provide an use above-mentioned liquid sulphur storage tank to contain sulphur waste gas collecting device's liquid sulphur storage tank contains sulphur waste gas treatment system to solve current liquid sulphur storage tank desulphurization unit and lead to the risk that the superpressure takes place for the liquid sulphur storage tank easily, the lower technical problem of security.
In order to achieve the above object, the utility model discloses a liquid sulfur storage tank contains sulphur waste gas collection device's technical scheme is:
the sulfur-containing waste gas collection device of the liquid sulfur storage tank comprises:
the gas collecting hood is used for covering the upper part of the dissipation pipe of the liquid sulfur storage tank;
and the sulfur receiving plate is arranged below the gas collecting hood and is in clearance fit with a hood opening of the gas collecting hood, and the sulfur receiving plate is provided with an escape pipe perforation hole corresponding to the escape pipe of the liquid sulfur storage tank.
Has the advantages that: the utility model discloses a liquid sulphur storage tank contains sulphur waste gas collection device adopts the gas collecting channel cover to establish in the top of liquid sulphur storage tank loss pipe, can be cooled down when meeting the gas collecting channel from the waste gas of liquid sulphur storage tank loss pipe escape, most sulphur vapour is cooled off and becomes solid-state sulphur adhesion on the inner wall of gas collecting channel in the waste gas, because the sulphur board that connects of gas collecting channel lower part and the gas collecting channel cover mouth clearance fit, make the gas collecting channel be in open mode, and can not seal liquid sulphur storage tank loss pipe mouth of pipe, this phenomenon that the superpressure appears in just also having avoided the liquid sulphur storage tank, and then just also avoided the risk that the liquid sulphur storage tank blast, the security is higher.
Furthermore, the gas-collecting hood is provided with a cleaning window for cleaning sulfur powder on the inner wall of the gas-collecting hood.
Has the advantages that: the sulfur powder attached to the inner wall of the gas collecting hood can be cleaned conveniently through the cleaning window so as to be recycled.
Further, the upper surface of the sulfur receiving plate is flush with or lower than the upper pipe orifice of the liquid sulfur storage tank escape pipe.
Has the advantages that: can clean the adnexed sulphur powder of gas collecting channel inner wall to connect the sulphur board on, then clean to fall into the liquid sulphur storage tank in the loss pipe through connecting the sulphur board, be convenient for the recovery of sulphur powder.
The utility model discloses a liquid sulphur storage tank contains sulphur waste gas treatment system's technical scheme is:
the liquid sulfur storage tank contains sulphur waste gas treatment system includes:
the gas collecting hood is used for covering the upper part of the dissipation pipe of the liquid sulfur storage tank;
the sulfur receiving plate is arranged below the gas collecting hood and is in clearance fit with a hood opening of the gas collecting hood, and an escape pipe through hole corresponding to an escape pipe of the liquid sulfur storage tank is formed in the sulfur receiving plate;
the water washing device is connected with the gas collecting hood;
the alkali washing device is connected with the water washing device;
and the recovery device is connected with the water washing device and is used for recovering the elemental sulfur which is insoluble in water after water washing.
Has the advantages that: the utility model discloses a liquid sulphur storage tank contains sulphur waste gas treatment system adopts the gas collecting channel cover to establish in the top of liquid sulphur storage tank loss pipe, can be cooled down when meeting the gas collecting channel from the waste gas of liquid sulphur storage tank loss pipe escape, most sulphur vapour is cooled off and becomes solid-state sulphur adhesion on the inner wall of gas collecting channel in the waste gas, because the gas collecting channel lower part connect sulphur board and gas collecting channel cover mouth clearance fit, make the gas collecting channel be in open state, and can not seal liquid sulphur storage tank loss pipe mouth of pipe, this phenomenon that the superpressure appears in just also having avoided the liquid sulphur storage tank, and then just also avoided the risk that the liquid sulphur storage tank blast, the security is higher, realize the steady operation.
Furthermore, the gas-collecting hood is provided with a cleaning window for cleaning sulfur powder on the inner wall of the gas-collecting hood.
Has the advantages that: the sulfur powder attached to the inner wall of the gas collecting hood can be cleaned conveniently through the cleaning window so as to be recycled.
Further, the upper surface of the sulfur receiving plate is flush with or lower than the upper pipe orifice of the liquid sulfur storage tank escape pipe.
Has the advantages that: can clean the adnexed sulphur powder of gas collecting channel inner wall to connect the sulphur board on, then clean through connecting the sulphur board and fall into the liquid sulphur storage tank in to liquid sulphur storage tank loss pipe, the recovery of the sulphur powder of being convenient for.
Furthermore, a gas blocking structure for reducing the escape of waste gas from the gap between the sulfur-receiving plate and the gas-collecting hood is arranged below the sulfur-receiving plate.
Has the advantages that: the exhaust gas can be reduced to escape from the gas collecting hood, and the harm to the environment and personnel is reduced.
Furthermore, the gas circuit pipeline connecting the gas outlet of the gas-collecting hood and the gas inlet of the water washing device is a heat tracing pipeline.
Has the advantages that: because the gas circuit pipeline between the water washing device and the gas collecting hood is a heat tracing pipeline, sulfur vapor in the waste gas is at a proper temperature and cannot be cooled into solid sulfur, so that the situation of pipeline blockage is not easy to occur, and the waste gas can be fully washed in the water washing device.
Further, the gas pipeline connecting the gas outlet of the water washing device and the gas inlet of the alkali washing device is a bare pipe.
Has the advantages that: the waste gas is favorably cooled, the water in the alkali liquor is prevented from being consumed due to overhigh temperature of the waste gas entering the alkali washing device, and in addition, a small amount of untreated sulfur powder in the waste gas is conveniently cooled and deposited through a bare pipe.
Further, a gas detector for detecting the concentration of hydrogen sulfide in the purified gas after alkaline cleaning is arranged at the gas outlet of the alkaline cleaning device.
Has the advantages that: through observing the concentration that shows on the gas detection appearance, can know the concentration of hydrogen sulfide in the purification gas, and then can learn the neutralization condition of alkali lye in the alkali wash device to in time replace alkali lye, ensure desulfurization effect.
Drawings
FIG. 1 is a process flow diagram of embodiment 1 of the sulfur-containing waste gas treatment system of the liquid sulfur storage tank of the present invention;
FIG. 2 is a schematic view of the structure of the gas-collecting hood in embodiment 1 of the sulfur-containing waste gas treatment system for a liquid sulfur storage tank of the present invention;
fig. 3 is the structure diagram of the washing device in embodiment 1 of the sulfur-containing waste gas treatment system for the liquid sulfur storage tank of the present invention.
Description of reference numerals:
1-liquid sulfur storage tank, 2-gas collecting hood, 3-purified gas diffusing pipe, 4-precipitation collecting tank, 5-sewage collecting tank, 6-jacket heat tracing pipeline, 7-water washing device, 8-suction fan, 9-alkali liquor feeding pipe, 10-alkali liquor discharging pipe, 11-booster fan inlet temperature transmitter, 12-booster fan inlet pressure transmitter, 13-booster fan, 14-booster fan outlet temperature transmitter, 15-booster fan outlet pressure transmitter, 16-alkali washing device, 17-pall ring packing and 18-hydrogen sulfide detector.
201-one-way louver, 202-sulfur-receiving plate, 203-liquid sulfur storage tank dissipation pipe, 204-lower part of gas-collecting hood, 205-upper part of gas-collecting hood, 206-cleaning window, 207-movable door, and 208-gas-collecting hood outlet pipe.
701-a water washing tank, 702-an impact pipe, 703-a demisting net, 704-a gas collecting box, 705-an air inlet pipe, 706-an air outlet pipe, 707-a water inlet pipe and 708-a water outlet pipe.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
The utility model discloses a liquid sulphur storage tank contains sulphur exhaust gas treatment system's embodiment 1:
as shown in fig. 1, 2 and 3, the sulfur-containing waste gas treatment system of the liquid sulfur storage tank comprises a gas collecting device, a water washing device connected with the gas collecting device, an alkaline washing device connected with the water washing device and a recovery device.
The gas collecting device comprises a gas collecting hood 2 which is used for covering the upper part of the liquid sulfur storage tank 1, as shown in figure 2, the gas collecting hood 2 is open, a keel is made of 316L stainless steel square steel, a 1.0mm aluminum plate is wrapped outside the gas collecting hood 2, the gas collecting hood 2 comprises two parts, namely a gas collecting hood upper part 205 and a gas collecting hood lower part 204, the gas collecting hood lower part 204 is in a cuboid shape, and the gas collecting hood upper part 205 is in a pyramid shape. The top of the gas-collecting hood 2 is provided with a gas outlet, the gas outlet is provided with a small segment of gas-collecting hood gas outlet pipe 208, and the gas-collecting hood gas outlet pipe 208 is connected with the gas inlet of the water washing device 7 through a pipeline. Because the gas collecting hood 2 is made of stainless steel and aluminum materials and has high corrosion resistance, the sulfur-containing waste gas dissipated from the dissipating pipe 203 of the liquid sulfur storage tank cannot be corroded to generate ferrous sulfide after contacting the gas collecting hood, thereby reducing the risks of spontaneous combustion of the ferrous sulfide, fire and the like.
When the gas collecting hood 2 is used, the gas collecting hood covers the top of the liquid sulfur storage tank 1 and is 5cm away from the tank top of the liquid sulfur storage tank, all the liquid sulfur storage tank dissipation pipes 203 are covered in the gas collecting hood 2, steam tracing is not arranged in the gas collecting hood 2, when sulfur-containing waste gas escapes from the liquid sulfur storage tank dissipation pipes, most of sulfur steam is in contact with the gas collecting hood 2 and is cooled, and solid sulfur powder is formed and adhered to the side wall of the gas collecting hood 2. In order to facilitate the recovery of the elemental sulfur and avoid waste, two cleaning windows 206 are opened on the pyramid-shaped part of the gas-collecting hood 2, and a sulfur-receiving plate 202 made of aluminum material is disposed below the gas-collecting hood 2, and the upper surface of the sulfur-receiving plate 202 is in clearance fit with the hood opening of the gas-collecting hood 2. An openable and closable movable door 207 is arranged at the cleaning window 206, and when the movable door 207 is closed, waste gas cannot escape from the cleaning window 206, so that the tightness of the cleaning window 206 is ensured. The sulfur receiving plate 202 is provided with an escape pipe through hole for the liquid sulfur storage tank escape pipe 203 to penetrate, the sulfur receiving plate 202 is fixedly connected with the liquid sulfur storage tank escape pipe 203, so that the upper orifice of the liquid sulfur storage tank escape pipe 203 is flush with the upper hole edge of the escape pipe through hole in the sulfur receiving plate 202, and a small amount of gaps are formed between the sulfur receiving plate 202 and the four inner wall surfaces of the lower part 204 of the gas collecting hood. When the elemental sulfur in the gas-collecting hood 2 is recovered, the movable door 207 is opened, and the sulfur powder on the inner wall of the gas-collecting hood 2 is swept onto the sulfur-receiving plate 202 by the sweeping device and is swept into the liquid sulfur storage tank 1 again finally. In order to reduce the escape of the exhaust gas in the gas collecting hood, an air blocking structure is further arranged below the sulfur receiving plate 202, and in this embodiment, the air blocking structure is a unidirectional louver cascade 201. Because the sulfur-collecting plate 202 does not completely seal the bottom of the gas-collecting hood, that is, the liquid sulfur storage tank 1 is not in a sealed state, the occurrence of overpressure and negative pressure in the liquid sulfur storage tank 1 can be eliminated.
The gas-collecting hood outlet pipe 208 is connected with the washing device 7 through the jacket heat tracing pipeline 6, and the jacket heat tracing pipeline 6 can prevent sulfur vapor flowing out of the gas-collecting hood 2 from being cooled and gathered to form solid elemental sulfur, so that the pipeline blockage can be avoided. In this embodiment, the washing device 7 includes a washing tank 701, a water inlet and a water outlet are provided on a wall of the washing tank 701, the water inlet is connected to the water inlet pipe 707, and the water outlet is connected to the water outlet pipe 708. An air inlet pipe 705 is arranged in the rinsing tank 701, an air inlet of the air inlet pipe 705 forms an air inlet of the rinsing tank and is connected with the jacket heat tracing pipeline 6, and an air outlet of the air inlet pipe 705 is positioned in the rinsing tank 701. The air inlet pipe 705 is integrally located above the water inlet, and the air inlet pipe 705 is provided with a plurality of air outlets at intervals along the axial direction thereof, and the air outlets are connected with the impact pipe 702. The air outlet of the rinsing bath is arranged above the air inlet pipe and is connected with the alkaline washing device through an air outlet pipe 706. When the waste gas enters the gas inlet pipe 705 of the water washing device from the jacket heat tracing pipeline 6 at a certain flow rate, the waste gas enters the impact pipe 702 along the gas outlet hole on the gas inlet pipe 705, the water in the water washing tank 701 forms a vortex water curtain under the impact of the gas, the vortex water curtain is fully contacted with the waste gas, and solid sulfur powder particles carried by the waste gas are washed out by the water and enter the water washing tank 701.
In this embodiment, the recycling device includes a sedimentation collection tank 4 connected to the water outlet pipe 708, and the sedimentation collection tank 4 is connected to a sewage collection tank 5. In the washing process, the liquid drops of the sulfur in the waste gas contact with water and are cooled to become sulfur powder, the sulfur powder is precipitated in a washing tank and enters a precipitation collecting tank 4 from a water outlet pipe, the sulfur powder is precipitated and recovered, the waste water is discharged into a sewage collecting tank 5, and the sulfur powder is discharged after reaching the standard after being treated and detected to be qualified.
In order to avoid the waste gas after water washing to contain water vapor, a water removal structure is arranged at the air outlet of the water washing tank. In this embodiment, the water removal structure is a mist elimination net 703, a gas collection box 704 is arranged right above the mist elimination net 703, and the water-washed exhaust gas enters the gas collection box 704 after passing through the mist elimination net to discharge water. The air outlet pipe 706 connecting the water washing device 7 and the alkaline washing device 16 is connected in series with the suction fan 8 and the booster fan 13 in sequence, wherein the suction fan 8 is communicated with the air collection tank 704 and is used for sucking the waste gas in the air collection tank 704 into the air outlet pipe 706 and then into the booster fan 13, and then into the alkaline washing device 16 under the pressurization of the booster fan 13. A booster fan inlet temperature transmitter 11 and a booster fan inlet pressure transmitter 12 are sequentially arranged on a pipeline between the suction fan 8 and the booster fan 13 and are respectively used for detecting the temperature and the pressure of waste gas before entering the booster fan 13; a booster fan outlet temperature transmitter 14 and a booster fan outlet pressure transmitter 15 are sequentially arranged on a pipeline between the booster fan 13 and the alkaline cleaning device 16 and are respectively used for detecting the temperature and the pressure of the waste gas after being boosted by the booster fan.
In this embodiment, the air outlet pipe 708 is formed by connecting multiple segments of bare pipes through flanges, that is, the pipeline between the suction fan and the booster fan includes multiple segments of bare pipes connected to each other, and the pipeline between the booster fan and the alkaline cleaning device includes multiple segments of bare pipes connected to each other. The bare tube is convenient for cooling the waste gas again, on one hand, the unseparated elemental sulfur after water washing can be deposited, and on the other hand, the influence on the desulfurization effect caused by overhigh temperature of the waste gas entering the alkaline washing device can be avoided. In addition, the multiple sections of bare tubes are connected through flanges, so that deposited sulfur powder is convenient to disassemble and clean.
The alkaline washing device 16 comprises an alkaline washing reactor, a gas pipeline is arranged in the alkaline washing reactor, an inlet of the gas pipeline is arranged at the bottom of the alkaline washing reactor, and acid gas in the waste gas is removed in a low-inlet and high-outlet mode. The alkaline washing reactor 16 is filled with 10% NaOH solution which can react with H in the waste gas2S、SO2The reaction produced sodium salt. In order to enhance the absorption effect of alkali liquor, irregular pall ring fillers 17 are filled in the alkali washing reactor, and the pall ring fillers 17 are in the prior art; a plurality of air outlets are formed in a gas pipeline inside the alkaline washing reactor, waste gas enters from the bottom of the alkaline solution reactor and is dispersed through the air outlets, and hydrogen sulfide in the waste gas reacts with the alkaline solution on the surface of the filler. The purified gas desulfurized after the reaction with the alkali liquor is discharged to the atmosphere through a purified gas diffusing pipe 3 connected with a gas outlet at the top of the alkali washing reactor. A hydrogen sulfide gas detector 18 is arranged at the position of the purified gas diffusing pipe 3 close to the top gas outlet of the alkaline washing reactor, the concentration of hydrogen sulfide in the purified gas is detected on line, and H in the purified gas is detected2And (5) determining the content of S, and determining whether the alkali liquor is saturated and timely replacing. In this example, when the detected concentration reached the early warning value of 5ppm, the sodium hydroxide solution was replaced to ensure the desulfurization effect.
The process flow of the sulfur-containing waste gas treatment system of the liquid sulfur storage tank is as follows:
sulfur-containing waste gas in a liquid sulfur storage tank 1 enters a gas collecting hood 2 through a liquid sulfur storage tank escape pipe 203, most sulfur vapor contacts the gas collecting hood 2 and is cooled and condensed into sulfur powder to be adhered to the gas collecting hood 2, the rest waste gas enters a water washing device 7 through a jacket heat tracing pipeline 6, the waste gas contacts water liquid in a water washing groove through an air inlet pipe 705 and an impact pipe 702 to remove the sulfur powder and reduce the temperature of the gas phase, the waste gas enters a gas collecting tank through a defogging net and is introduced into a booster fan 13 through a suction fan 8, the waste gas enters an alkaline washing reactor after being pressurized to 35kPa, and H in the waste gas2S、SO2The acidic components react with the alkali liquor to achieve desulfurization, and the final purified gas is discharged into the atmosphere through a diffusing pipe 19.
In the washing process, the washing water in the washing tank is supplied by a production water supply pipe network and is supplemented intermittently. The sulfur powder is introduced into a water washing tank 701 through a water inlet pipe 707, when the sulfur powder content in the water washing tank 701 is high (normally, the water body is changed from clarification to yellow turbid state through visual observation), the sulfur powder is discharged into a precipitation collecting tank 4 through a water outlet pipe 708, the sulfur powder is recovered after precipitation, clear water after precipitation is discharged into a sewage collecting tank 5, and the clear water after treatment is qualified and discharged after reaching the standard.
In the alkali washing process, alkali liquor in the alkali washing reactor is also supplemented intermittently. When the hydrogen sulfide detector 18 on the purified gas diffusing pipe 3 reaches a preset alarm value of 5ppm, indicating that the alkali liquor is basically saturated, discharging the saturated alkali liquor from an alkali liquor discharge pipe 10 connected with the alkali washing reactor, and supplementing fresh alkali liquor through an alkali liquor feed pipe 9 connected with the alkali washing reactor. And the waste alkali liquor and the fresh alkali liquor are both hauled by a tank wagon.
The utility model discloses a liquid sulphur storage tank contains sulphur waste gas treatment system flow is simple, convenient operation, purification efficiency are high, eliminate a jar body superpressure, negative pressure risk simultaneously, have solved and have contained sulphur powder acid gas waste gas treatment system and block up, corrode the scheduling problem, have realized the standard reached of waste gas treatment, sulphur simple substance resource recovery to the long period steady operation of device has been realized.
this embodiment differs from the above embodiment 1 in that: the gas collecting channel is not provided with a cleaning window and a movable door, so that when sulfur powder in the gas collecting channel is recovered, the gas collecting channel can be detached to clean and recover, and an operator needs to wear protective clothing to operate at the moment so as to avoid harm to personal safety.
Specific example 3 of the sulfur-containing waste gas treatment system of the liquid sulfur storage tank:
this embodiment differs from the above embodiment 1 in that: the gas blocking structure is not arranged below the sulfur receiving plate, and correspondingly, the sulfur receiving plate is made larger, so that the gap between the sulfur receiving plate and the gas blocking cover is smaller, and the escape of waste gas is reduced.
Specific example 4 of the sulfur-containing waste gas treatment system of the liquid sulfur storage tank:
this embodiment differs from the above embodiment 1 in that: the water washing device adopts a water washing tower, the top outlet of the water washing tower is connected with the air inlet of the alkaline washing device, the middle inlet of the water washing tower is connected with the air outlet of the gas collecting hood, the upper part of the water washing tower is provided with a spray shower head, the lower part of the water washing tower is provided with a cooling pipe, the bottom of the water washing tower is provided with a sulfur powder filter, and the outlet of the sulfur powder filter is connected with the spray shower head through a water circulating pump. During operation, waste gas enters an inlet in the middle of the water washing tower through the gas collecting hood, spray liquid is sprayed through the spray shower head, the spray liquid is mainly water, sulfur vapor in the waste gas rapidly forms flocculent sulfur crystals after contacting with water in the water washing tower to be precipitated in a solution at the lower part of the water washing tower, the treated waste gas escapes from a top outlet and enters the alkaline washing device, a water solution containing sulfur powder flows out from the bottom of the water washing tower and enters the sulfur powder filter to recover the sulfur powder, and the residual acidic water solution is pumped into the top of the water washing tower through the water circulating pump to serve as the spray liquid, so that the circulating operation is realized.
Specific example 5 of the sulfur-containing waste gas treatment system of the liquid sulfur storage tank:
this embodiment differs from the above embodiment 1 in that: the upper hole edge of the through hole of the dissipation pipe on the sulfur receiving plate is lower than the upper pipe orifice of the dissipation pipe of the liquid sulfur storage tank.
Specific example 6 of the sulfur-containing waste gas treatment system of the liquid sulfur storage tank:
this embodiment differs from the above embodiment 1 in that: and a gas detector is not arranged, so that whether the alkali liquor is saturated or not can be detected by observing whether irritant gas escapes from the purified gas diffusion pipe or not, and if yes, the alkali liquor can be replaced in time.
The specific embodiment of the sulfur-containing waste gas collecting device of the liquid sulfur storage tank comprises the following steps:
the structure of the gas collecting device for the sulfur-containing waste gas of the liquid sulfur storage tank is the same as that of the gas collecting device in the embodiment of the sulfur-containing waste gas treatment system of the liquid sulfur storage tank, and the description is omitted here.
The terms "first," "second," "third," "fourth," and the like in the description of the application and the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. Liquid sulphur storage tank contains sulphur waste gas collection device, its characterized in that includes:
the gas collecting hood is used for covering the upper part of the dissipation pipe of the liquid sulfur storage tank;
and the sulfur receiving plate is arranged below the gas collecting hood and is in clearance fit with a hood opening of the gas collecting hood, and the sulfur receiving plate is provided with an escape pipe perforation hole corresponding to the escape pipe of the liquid sulfur storage tank.
2. The sulfur-containing waste gas collecting device of the liquid sulfur storage tank as claimed in claim 1, wherein the gas collecting hood is provided with a cleaning window for cleaning sulfur powder on the inner wall of the gas collecting hood.
3. The liquid sulfur storage tank sulfurous waste gas collecting device as defined in claim 1 or 2, wherein the upper surface of the sulfur receiving plate is arranged to be flush with or lower than the upper nozzle of the liquid sulfur storage tank escape pipe.
4. Liquid sulphur storage tank contains sulphur waste gas treatment system, its characterized in that includes:
the gas collecting hood is used for covering the upper part of the dissipation pipe of the liquid sulfur storage tank;
the sulfur receiving plate is arranged below the gas collecting hood and is in clearance fit with a hood opening of the gas collecting hood, and an escape pipe through hole corresponding to an escape pipe of the liquid sulfur storage tank is formed in the sulfur receiving plate;
the water washing device is connected with the gas collecting hood;
the alkali washing device is connected with the water washing device;
and the recovery device is connected with the water washing device and is used for recovering the elemental sulfur which is insoluble in water after water washing.
5. The sulfur-containing waste gas treatment system for the liquid sulfur storage tank as claimed in claim 4, wherein the gas-collecting hood is provided with a cleaning window for cleaning sulfur powder on the inner wall of the gas-collecting hood.
6. The liquid sulfur storage tank sulfur-containing waste gas treatment system according to claim 5, wherein the upper surface of the sulfur receiving plate is arranged to be flush with or lower than the upper nozzle of the liquid sulfur storage tank escape pipe.
7. The liquid sulfur storage tank sulfur-containing exhaust gas treatment system as claimed in any one of claims 4 to 6, wherein a gas barrier structure for reducing the escape of exhaust gas from the gap between the sulfur-receiving plate and the gas-collecting hood is arranged below the sulfur-receiving plate.
8. The sulfur-containing waste gas treatment system for the liquid sulfur storage tank as claimed in any one of claims 4 to 6, wherein the gas pipeline connecting the gas outlet of the gas collecting hood and the gas inlet of the water washing device is a heat tracing pipeline.
9. The sulfur-containing waste gas treatment system for the liquid sulfur storage tank as claimed in any one of claims 4 to 6, wherein the gas pipeline connecting the gas outlet of the water washing device and the gas inlet of the alkali washing device is a bare pipe.
10. The system for treating sulfur-containing waste gas from a liquid sulfur storage tank as claimed in any one of claims 4 to 6, wherein a gas detector for detecting the concentration of hydrogen sulfide in the purified gas after alkaline cleaning is provided at the gas outlet of the alkaline cleaning device.
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| CN114452766A (en) * | 2020-10-21 | 2022-05-10 | 中国石油化工股份有限公司 | Sulfur precipitation device, and treatment system and treatment method for sulfur-containing waste gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114452766A (en) * | 2020-10-21 | 2022-05-10 | 中国石油化工股份有限公司 | Sulfur precipitation device, and treatment system and treatment method for sulfur-containing waste gas |
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