CN109821386B - Sulfur loading tail gas recovery and treatment system and its tail gas treatment device - Google Patents

Abstract

The invention discloses a sulfur loading tail gas recovery and treatment system and a tail gas treatment device. The tail gas treatment device is proposed for the particularity of the loading overflow tail gas that overflows from the tank mouth of the sulfur tanker when the sulfur is loaded. It first uses the high-speed rotation formed by the lye formed by the liquid ring pump in the pump cavity. The liquid ring is mixed with the loading overflow exhaust gas pumped by the liquid ring pump's own vacuum suction capacity. The toxic gas hydrogen sulfide in the vehicle overflow exhaust can fully contact and react with the liquid ring, thereby obtaining non-toxic products, and further through the secondary purification of the cleaning tank, so that the gas discharged from the cleaning tank meets the environmental protection requirements, while the sulfur is It is deposited on the tank bottom of the cleaning tank, and finally discharged and collected through the sewage pipe equipped at the bottom of the tank. It can be seen from this that the present invention can effectively avoid the harm caused by the sulfur loading exhaust to the human body and the environment.

Description

Sulfur loading tail gas recovery and treatment system and its tail gas treatment device

technical field

The invention relates to a sulfur loading tail gas recovery and treatment system and a tail gas treatment device thereof, which are suitable for recovering and treating the escaping tail gas when the sulphur loading is carried out to prevent the tail gas from escaping into the atmosphere and causing pollution to the atmosphere.

Background technique

Sulfur must be liquid when loading, and the melting point of sulfur is 119°C. Therefore, the loading temperature needs to be kept above 120°C, and liquid sulfur will produce a large amount of sulfur vapor, hydrogen sulfide and other harmful gases.

At present, the harmful exhaust gas (sulfur vapor, hydrogen sulfide, etc.) produced by sulfur loading is generally not treated. When loading, harmful exhaust gas often escapes into the atmosphere through the gap between the feeding pipe and the tank mouth of the sulfur tanker. Hydrogen sulfide and sulfur vapor, which will form a large amount of sulfur dust after cooling, both cause great damage to the human body and the environment.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the present invention provides a sulfur loading tail gas recovery and processing system and a tail gas processing device thereof. Aiming at the particularity of the loading overflow tail gas overflowing from the tank mouth of the sulfur tanker when the sulfur is loaded, the invention adopts the high-speed rotating liquid ring formed by the alkali liquid formed by the liquid ring pump in the pump cavity, and the liquid ring pump The loading overflow exhaust gas sucked by its own vacuum suction capacity can be mixed, on the one hand, it can cool the sulfur vapor in the loading overflow exhaust gas, so as to solidify to form sulfur solid (powder), on the other hand, the loading overflow exhaust gas can be mixed. The poisonous gas hydrogen sulfide can fully contact the liquid ring, and the two can react almost instantaneously to obtain non-toxic products. To sum up, it can be seen that the liquid ring pump basically eliminates the toxicity of the overflow exhaust gas from loading, and further After the secondary purification of the cleaning tank, the gas discharged from the cleaning tank meets the environmental protection requirements, while the sulfur is deposited on the tank bottom of the cleaning tank, and finally discharged and collected through the sewage pipeline equipped at the bottom of the tank. It can be seen from this that the present invention can effectively avoid the harm caused by the sulfur loading exhaust to the human body and the environment.

For realizing the above-mentioned technical purpose, the present invention will take the following technical scheme:

A tail gas treatment device of a sulfur loading tail gas recovery and treatment system includes a liquid ring pump tail gas treatment module and a tail gas post-treatment module; the liquid ring pump tail gas treatment module includes a liquid ring pump, and the tail gas post-treatment module includes a cleaning tank, and the cleaning tank contains There is lye; in the liquid ring pump, the air inlet of the liquid ring pump vacuum suctions the loading overflow exhaust gas that overflows from the tank mouth of the sulfur tanker when the sulfur tanker is filled with liquid sulfur, and the liquid inlet passes through the liquid inlet pipeline. It is connected with the cleaning tank, the outlet is connected with the cleaning tank through the air supply pipeline, and the connection point between the liquid inlet pipeline and the cleaning tank is located below the liquid level of the lye in the cleaning tank, and the connection point between the air supply pipeline and the cleaning tank is located in the cleaning tank. Above the liquid level of the lye in the tank; the cleaning tank is provided with a sewage pipe at the bottom of the tank, and a sewage valve is installed on the sewage pipe.

As a further improvement of the above-mentioned exhaust gas treatment device, the exhaust gas treatment device further includes an exhaust gas pre-treatment module; the exhaust gas pre-treatment module includes a suction pipe; the suction pipe is a steam jacket tube with an inclined section and a vertical section; the inclined section The inclination angle is less than 90°, and the upper end of the inclined section is connected to the side wall of the feeding pipe, the lower end is connected to one end of the vertical section, and the other end of the vertical section is equipped with a collection valve adjacent to the position; The gas pipeline is connected; the interlayer of the suction pipeline can input steam through the steam delivery pipeline.

As a further improvement of the above-mentioned exhaust gas treatment device, both the inclined section and the vertical section of the suction pipe are also steam jacketed stainless steel pipes.

As a further improvement of the above-mentioned exhaust gas treatment device, the sewage pipe is connected to a flushing pipe by bypass; a flushing valve is installed on the flushing pipe, and is connected to a 4-7bar compressed air pipeline.

As a further improvement of the above-mentioned exhaust gas treatment device, a liquid inlet valve is installed on the liquid inlet conveying pipeline; and an air supply valve is installed on the air supply pipeline.

As a further improvement of the above-mentioned exhaust gas treatment device, the height of the liquid level in the cleaning tank is the same as the center position of the pump cavity of the liquid ring pump.

As a further improvement of the above-mentioned exhaust gas treatment device, a high-level liquid level switch, a low-level liquid level switch and a pH sensor for detecting the pH value of the lye in the cleaning tank are installed in the cleaning tank; the lye liquid level in the cleaning tank triggers the high-level liquid level When switching or low level liquid level switch, the corresponding liquid level signal can be fed back to the control box; the pH value signal of the lye in the cleaning tank detected by the pH sensor can be fed back to the control box; the control box can receive the high level liquid level by receiving The liquid level signal fed back by the switch or the low-level liquid level switch automatically controls the liquid ring pump to stop and sends an alarm signal; through the pH value signal fed back by the pH sensor, an alarm signal is sent to remind the replacement of the lye in the cleaning tank; at the same time, The control box can automatically control the rotational speed of the liquid ring pump according to the pressure value of the overflow exhaust gas introduced into the inlet of the suction pipe.

As a further improvement of the above-mentioned exhaust gas treatment device, the top of the cleaning tank is equipped with a carbon canister, and the top of the carbon canister is provided with an exhaust pipe.

A sulfur loading tail gas recovery and treatment system is provided with the above-mentioned tail gas treatment device.

According to the above-mentioned technical scheme, compared with the prior art, the present invention has the following advantages:

The invention can effectively treat the harmful exhaust gas, hydrogen sulfide, steam, dust and the like generated by the loading of sulfur, and is no longer discharged into the atmosphere.

Description of drawings

Fig. 1 is the structural representation of the sulfur loading tail gas recovery processing system of the present invention;

Fig. 2 is the structural representation of the feeding pipe described in Fig. 1;

Fig. 3 is the structural schematic diagram of the feeding pipe shown in Fig. 2 in the first limit position;

Fig. 4 is the structural schematic diagram of the feeding pipe shown in Fig. 2 in the second limit position;

Fig. 5 is the structural representation of the feeding pipe equipped with the sulphur collecting cover (the feeding pipe is in working state);

Fig. 6 is the structural representation of the feeding pipe equipped with the sulphur collecting cover (after the feeding of the feeding pipe is completed);

7 is a schematic structural diagram of the tail gas recovery device (excluding the tail gas pretreatment module) according to the present invention;

Fig. 8 is the structural representation of the exhaust gas pretreatment module in the exhaust gas recovery device of the present invention;

In the figure: 11-sealing airbag; 12-feeding pipe; 12-1, movable casing; 12-2, sealing ring; 12-3, fixed casing; 12-4, exhaust gas output interface; 13-pressure sensor; 14 -Connecting flange; 15-Servo mechanism; 16-Sleeve clearance; 17-Fixed main pipe; 2-Liquid sulfur delivery pipeline; 3-Suction pipeline; 31-Tee joint; 32-Collect valve; 35-vertical section; 41-air supply valve; 42-liquid ring pump; 43-liquid supply valve; 44-filter; 45-air supply pipeline; 46-inlet pipeline; 51-flushing valve; 52-drain valve; 53- Cleaning tank; 54-lye; 55-recovery cover; 61-sulfur collection cover, 62-rail; 7-sulfur tanker.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The relative arrangement of components and steps, expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise. Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the authorized description. In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device can also be positioned in other different ways (rotated 90 degrees or at other orientations).

The basis of the present invention is that when liquid sulfur is canned in 7 existing sulfur tankers, it is carried out without protection. The tank mouth of the tank car 7 is discharged into the atmosphere. Therefore, the technical idea of the present invention is to provide a charging pipe 12, so that when the sulfur tanker 7 is filled with liquid sulfur, the outer wall of the charging pipe 12 can be sealed with the gap between the tank mouth of the sulfur tanker 7; and The position where the charging pipe 12 outputs the loading overflow exhaust gas is set as a sandwich wall structure, so that the loading overflow exhaust gas can flow through the sandwich wall and flow out through the exhaust gas output interface 12-4 on the outer pipe at the position of the sandwich wall, preventing the loading and unloading. The overflow exhaust gas from the truck cannot be discharged, which affects the normal operation of the 7 tanked liquid sulfur in the sulfur tanker; then the overflow exhaust gas from the truck loading from the exhaust gas output port 12-4 enters the liquid ring pump 42 under the action of vacuum suction provided by the liquid ring pump 42. The ring pump 42 is then mixed with the liquid ring formed by the lye in the liquid ring pump 42, so that the sulfur vapor in the overflow tail gas of loading is cooled and solidified into sulfur solid, and after the hydrogen sulfide reacts with the lye, a non-toxic product is formed, and finally the sulfur The solids, non-toxic products and the remaining tail gas in the overflow tail gas of loading are discharged together from the outlet of the liquid ring pump 42 into the cleaning tank 53 for further purification; After the tank is adsorbed, it is discharged into the atmosphere, and the solid sulfur is deposited on the bottom of the cleaning tank 53, and finally discharged to the collection container through the sewage pipeline at the bottom of the cleaning tank 53.

According to the above-mentioned technical idea, the present invention provides a sulfur loading tail gas recovery and treatment system, which is used to collect the loading overflow tail gas that overflows from the tank mouth of the sulfur tanker 7 when the sulfur tanker 7 is filled with liquid sulfur, as shown in Figure 1 As shown in 8, including the feeding pipe 12 and the exhaust gas treatment device, wherein:

The feeding pipe 12, as shown in Fig. 2-4, is a rigid pipe with a retractable length placed vertically, and a tail gas output port 12-4 is provided on the side wall, and the feeding pipe 12 is located where the tail gas output port 12-4 is located. At the position of the tube, it is set as a sandwich wall structure; the sandwich wall structure includes an outer tube and an inner tube, the upper end of the inner tube is fixed with the liquid sulfur conveying pipeline 2, and the lower end of the inner tube is suspended in the inner cavity of the outer tube; the upper end of the outer tube is connected to the The outer wall of the inner pipe is fixed, and the lower end of the outer pipe can be sealed and connected with the tank mouth of the sulfur tanker 7 in a detachable connection manner.

Specifically, the feeding pipe 12 includes a fixed main pipe 17 and a slidable feeding pipe 12; the fixed main pipe 17 is an inner pipe, and the slidable feeding pipe 12 is an outer pipe, including a fixed sleeve 12-3 and a movable sleeve 12-1 . The fixed main pipe 17, the upper end is fixed with the liquid sulfur conveying pipeline 2, and the lower end extends into the fixed sleeve 12-3, and an annular gap with a length of d can be formed between the outer wall of the fixed main pipe 17 and the inner wall of the fixed sleeve 12-3; And the pipe wall of the fixed main pipe 17 at the corresponding position of the annular gap is provided with an exhaust gas output interface 12-4; the fixed sleeve 12-3, the upper end of which is fixed with the outer pipe wall of the fixed main pipe 17, and the lower end extends into the movable sleeve 12-1; There is a sliding pair between the movable sleeve 12-1 and the outer wall of the fixed sleeve 12-3, and the movable sleeve 12-1 and the fixed sleeve 12-3 are sealed at the position where the sliding pair is formed; The movable sleeve 12-1 is equipped with a sealing member which can be sealedly connected with the tank mouth of the sulfur tanker 7 on the outer wall surface immediately adjacent to the lower end.

The movable sleeve 12-1 has a sliding pair between the inner tube wall adjacent to the upper end and the outer tube wall of the fixed sleeve 12-3.

The upper end of the fixed main pipe 17 is fixed with the liquid sulfur conveying pipe 2 through the transition pipe; the transition pipe is a steam jacketed stainless steel hose, and the interlayer of the transition pipe can flow into the steam; the mouth of the feeding pipe 12 is equipped with a sulfur collector cover 61; and the sulfur collecting cover 61 is fixed with the outer wall of the charging pipe 12 through a laterally movable mechanism; when the charging pipe 12 is required to be connected with the tank mouth of the sulfur tanker 7, the sulfur collecting cover is driven by the laterally movable mechanism. 61 is moved to the side of the feeding pipe 12 ; when the feeding pipe 12 is completed, the sulfur collecting cover 61 is moved to the right below the feeding pipe 12 by the drive of the lateral movable mechanism.

The seal can be an annular seal ring made of fluorocarbon rubber, which is fixed on the outer ring of the movable sleeve 12-1. The lower end of the sealing ring is provided with a circle of conical grooves for sealing the mouth of the tank.

The sealing element can be a corrosion-resistant airbag, which is fixed on the outer ring of the movable sleeve 12-1. The can mouth is sealed with the good filling performance of the air bag.

The sealing element can also be a conical sealing ring made of fluorocarbon rubber; it is fixed on the outer ring of the sliding part of the feeding pipe 12 . The whole is conical, which can seal the mouth of the can well.

The exhaust gas treatment device, as shown in Figures 1, 7 and 8, includes a tail gas pre-treatment module, a liquid ring pump 42 tail gas treatment module and an exhaust gas post-treatment module; the exhaust gas pre-treatment module includes a suction pipe 3; The ring pump 42 tail gas treatment module includes a liquid ring pump 42, and the tail gas post-treatment module includes a cleaning tank 53, and the cleaning tank 53 is filled with lye. in:

The suction pipe 3 is a steam jacket tube with an inclined section 34 and a vertical section 35; the inclination angle of the inclined section 34 is less than 90°, and the upper end of the inclined section 34 is communicated with the side wall of the feeding pipe 12, and the lower end is connected with the vertical section. One end of 35 is connected, and the other end of the vertical section 35 is equipped with a collection valve 32 at the adjacent position; the vertical section 35 is connected with the intake pipe 46 by installing a three-way joint 31; the interlayer of the suction pipe 3 can be input steam through the steam transport pipe .

The inclined section 34 and the vertical section 35 of the suction pipe 3 are both steam jacketed stainless steel pipes.

In the liquid ring pump 42, the air inlet is communicated with the side wall of the feeding pipe 12 through the air inlet pipe 46, the liquid inlet is communicated with the cleaning tank 53 through the liquid inlet conveying pipe, and the outlet is communicated with the cleaning tank 53 through the filtering air supply pipe 45. , and the connection point of the liquid inlet pipeline and the cleaning tank 53 is located below the liquid level of the lye in the cleaning tank 53, while the connection point of the filter air supply pipeline 45 and the cleaning tank 53 is located above the liquid level of the lye in the cleaning tank 53 .

The cleaning tank 53 is provided with a drain pipe at the bottom of the tank, and a drain valve 52 is installed on the drain pipe.

As a further improvement of the above-mentioned sulfur loading exhaust gas recovery and treatment system, the sewage pipe is connected to the flushing pipe by bypass; the flushing pipe is installed with a flushing valve 51; 41.

According to the above-mentioned sulfur vehicle tail gas collection system, the present invention provides a method for collecting sulfur vehicle tail gas, comprising the following steps:

(1) After the sulfur tanker 7 stops at the designated position, the control box controls the servo mechanism 15 to drive the movable sleeve 12-1 of the feeding pipe 12 to slide, so that the seal at the end of the movable sleeve 12-1 can be connected with the tank of the sulfur tanker 7. The port is sealed and connected to complete the connection of the sulfur transportation pipeline, the exhaust gas treatment device, and the 7 tank ports of the sulfur tanker;

(2) The liquid sulfur transported by the sulfur transportation pipeline enters the sulfur tanker 7 through the feeding pipe 12 and the tank mouth of the sulfur tanker 7 in turn. In the annular gap formed by the feeding main pipe of the feeding pipe 12 and the fixed sleeve 12-3 of the feeding pipe 12, and then passing through the corresponding position of the annular gap, the exhaust gas output interface 12- 4. Enter the suction pipe 3 of the exhaust gas treatment device; at the same time, the sensing head of the pressure sensor 13 in the annular gap can feed back the detected pressure signal to the control box, and the control box starts the exhaust gas according to the pressure signal. The liquid ring pump 42 in the processing device automatically adjusts the rotational speed of the liquid ring pump 42 according to the magnitude of the pressure signal;

(3) Under the action of the vacuum suction of the liquid ring pump 42, the overflow exhaust gas from the loading passes through the suction pipe 3, the tee installed on the suction pipe 3, and the intake pipe 46 in turn, and then enters the liquid ring pump 42; During this process, after the loading overflow exhaust gas enters the suction pipe 3, most of the sulfur steam in it will be pre-cooled and cooled to become sulfur, which is consolidated on the pipe wall of the suction pipe 3, and the rest of the loading overflow The exhaust gas is fed into the liquid ring pump 42 through the intake pipe 46 through the three-way pipe on the suction pipe 3;

(4) the lye inhaled from the cleaning tank 53 by the liquid inlet in the liquid ring pump 42 forms a liquid ring, and reacts with the poisonous gas hydrogen sulfide in the loading overflow exhaust gas inhaled from the air inlet pipe 46 through the air inlet, At the same time, the sulfur vapor in the exhaust gas of the loading flow is further cooled and solidified into sulfur; the non-toxic products, sulfur and a small amount of the remaining overflow exhaust gas from the loading flow pass through the outlet of the liquid ring pump 42 together and pass through the air supply channel. Enter the cleaning tank 53;

(5) The lye in the cleaning tank 53 further processes the loading overflow tail gas introduced in the air supply channel; the gas is discharged after further purification treatment by the carbon tank above the cleaning tank 53; the sulfur is deposited on the tank bottom of the cleaning tank 53, and Finally, it is discharged into the collection hood through the sewage pipe.

As a further improvement of the above-mentioned sulfur loading exhaust gas collection method, in the cleaning tank 53, the liquid level of the lye is equivalent to the center position of the pump cavity of the liquid ring pump 42; in the step (3), by periodically sucking The interlayer of the gas pipe 3 is input with heating steam to melt the sulfur solid attached to the pipe wall of the gas pipe 3, and finally flows out through the vertical section 35 of the gas pipe 3 to the sulfur collection cover below the outlet of the gas pipe 3.

A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figure 1, in this embodiment, the described sulfur loading tail gas recovery and treatment system includes three parts, which are a feeding pipe 12, a feeding pipe 12, a tail gas treatment device and a control box; wherein:

The feeding pipe 12, placed vertically, includes a fixed main pipe 17 and a slidable feeding pipe 12; the slidable feeding pipe 12 includes a fixed sleeve 12-3 and a movable sleeve 12-1; the upper end of the fixed main pipe 17 is connected to the liquid The sulfur conveying pipe 2 is fixed, the lower end extends into the fixed sleeve 12-3, and an annular gap with a length of d can be formed between the outer wall of the fixed main pipe 17 and the inner wall of the fixed sleeve 12-3; and the fixed main pipe 17 is in the annular gap The pipe wall at the corresponding position is provided with an exhaust gas output interface 12-4, and a pressure sensor 13 for sensing the pressure of the tank mouth of the sulfur tanker 7 is installed on the fixed main pipe 17 above the exhaust gas output interface 12-4. The pressure sensor 13 detects The pressure value is fed back to the control box through the transmission line; the fixed sleeve 12-3, the upper end is fixed with the outer wall of the fixed main pipe 17, and the lower end extends into the movable sleeve 12-1; the movable sleeve 12-1, and the fixed sleeve There is a sliding pair between the outer tube walls of 12-3, and the movable sleeve 12-1 and the fixed sleeve 12-3 are sealed at the position where the sliding pair is formed; the movable sleeve 12-1 is on the outer wall surface immediately adjacent to the lower end. Equipped with a seal that can be sealed with the tank mouth of the sulfur tanker 7; at the same time, the movable sleeve 12-1 is connected to the power output end of the servo mechanism 15; down, can be extended and retracted relative to the fixed sleeve 12-3.

The tail gas treatment device includes a tail gas pre-treatment module, a liquid ring pump 42 tail gas treatment module and an exhaust gas post-treatment module.

The exhaust gas pretreatment module includes a suction pipe 3 ; the liquid ring pump 42 The exhaust gas treatment module includes a liquid ring pump 42 , and the exhaust gas posttreatment module includes a cleaning tank 53 , and the cleaning tank 53 is filled with lye.

The suction pipe 3 is a steam jacket tube with an inclined section 34 and a vertical section 35; the inclination angle of the inclined section 34 is less than 90°, and the upper end of the inclined section 34 is communicated with the side wall of the feeding pipe 12, and the lower end is connected with one end of the vertical section 35 Connected, the other end of the vertical section 35 is equipped with a collection valve 32 adjacent to the position; the vertical section 35 is connected with the intake pipe 46 by installing a three-way joint 31; The liquid ring pump 42, the air inlet is communicated with an interface of the tee pipe on the suction pipe 3 through the air inlet pipe 46, the liquid inlet is communicated with the cleaning tank 53 through the liquid inlet conveying pipe, and the outlet is connected with the filter air supply pipe 45. The cleaning tank 53 is communicated, and the connection point of the liquid inlet pipeline and the cleaning tank 53 is located below the liquid level of the lye in the cleaning tank 53, and the connection point of the filter air supply pipeline 45 and the cleaning tank 53 is located in the cleaning tank 53. The lye in the tank 53 above the liquid level.

The cleaning tank 53 is provided with a drain pipe at the bottom of the tank, and a drain valve 52 is installed on the drain pipe; and the drain pipe bypasses a flushing pipe, and a flushing valve 51 is installed on the flushing pipe; in addition, the cleaning tank 53 is installed with a high-level A liquid level switch, a low level liquid level switch and a pH sensor for detecting the pH value of the lye solution in the cleaning tank 53; when the lye liquid level in the cleaning tank 53 triggers the high level liquid level switch or the low level liquid level switch, the corresponding liquid level signal can be transmitted Feedback to the control box; the pH value signal of the lye in the cleaning tank 53 detected by the pH sensor can be fed back to the control box.

The control box automatically controls the servo mechanism 15 to drive the movable sleeve 12-1 to slide along the fixed sleeve 12-3 after receiving the signal that the sulfur tanker 7 is in position until the seal at the end of the movable sleeve 12-1 is in contact with the fixed sleeve 12-3. The tank mouth of the sulfur tank truck 7 is sealed and connected, and the servo mechanism 15 is stopped; by receiving the liquid level signal fed back by the high-level liquid level switch or the low-level liquid level switch, the liquid ring pump 42 is automatically controlled to stop and send an alarm signal; by receiving the pressure sensor 13. The feedback pressure value is compared with the preset pressure threshold value in the control box, and the working condition of the liquid ring pump 42 is automatically controlled.

In order to prevent the liquid sulfur in the feeding pipe 12 from dripping after the feeding of the feeding pipe 12 is completed, the present invention is equipped with a sulfur collecting cover 61; The servo mechanism 15 is pulled and can translate on the guide rail 62 ; the guide rail 62 is fixed on the slidable section of the feeding tube 12 .

After starting the feeding procedure, the collecting hood is moved out of the feeding area of the feeding pipe 12; after the feeding is completed, the feeding pipe 12 returns to the initial position and the collecting hood is moved to the bottom of the feeding pipe 12;

specifically:

A. Liquid sulfur conveying pipeline 2: steam jacket pipeline with vertical installation at the end.

B. Feeding pipe 12 (excluding transition hose): As shown in Figures 2, 3 and 4, it includes a fixed main pipe 17 on the upper part and a slidable feeding pipe 12 on the lower part. The upper fixed main pipe 17 is connected to the liquid sulfur conveying pipe 2 by flanges; the lower slidable feeding pipe 12 is pulled vertically by a servo motor. The outer ring of the slidable part of the feeding pipe 12 is installed with a corrosion-resistant sealing ring (sealing airbag 11 or other sealing type), which is used for sealing with the feeding port after the feeding pipe 12 extends into the feeding port of the tank.

C. Suction pipeline: connected with the exhaust gas output interface 12-4 opened on the upper side wall of the feeding pipe 12; it is a steam jacketed stainless steel pipe, and the whole is inclined downward; the middle vertical part is connected to the tee joint 31, and the tee joint 31 One end is vertically downward, and the other end is connected to the suction port of the liquid ring pump 42 . The vertical section 35 is a detachable part, and a collection valve 32 is added to the lower end. The suction pipe usually does not pass steam, but regularly passes steam to melt the sulfur solid attached to the tank and discharge it to the collection cover at the end of the pipe.

D. Cleaning tank 53: The tank body is made of 304 stainless steel plate; the bottom is concave, and the bottom is equipped with a discharge port and a relief valve; when there is a lot of sulfur deposited at the bottom of the tank, open the relief valve and add the sulfur mixture to the sulfur pit. The discharge pipe is connected to the 4-7bar compressed air flushing pipeline to solve the problem of blockage of the discharge pipe. The tank is filled with cleaning liquid (NaOH liquid), and the liquid level is the same as the center position of the liquid ring pump 42; the tank body is equipped with a liquid level gauge, an explosion-proof liquid level switch, and a pH sensor. The lower side wall of the tank body is connected with the pipeline to the liquid filling port of the liquid ring pump 42; the liquid filling pipeline is connected with the liquid feeding valve 43 and the filter 44. The upper side wall of the tank body is connected to the discharge port of the liquid ring pump 42 . The top of the tank is equipped with an activated carbon canister, and the exhaust port of the activated carbon canister serves as the exhaust port of the entire cleaning tank 53 .

The working principle of this embodiment is:

After the tanker stops at the designated position, the system controls the servo mechanism 15 to drive the feeding pipe 12 to connect with the tank mouth and seal successfully. The system starts feeding, the sulfur liquid is injected into the tanker, and a large amount of exhaust gas is generated into the feeding pipe 12 at the same time. The system controls the liquid ring pump 42 to enter the running state, and can suck the sulfur tail gas generated during feeding into the exhaust pipeline. The pressure sensor 13 at the upper end of the feeding pipe 12 transmits a signal to the control box, and the control box controls the rotational speed of the liquid ring pump 42 according to the pressure. The exhaust gas in the exhaust pipeline enters the liquid ring pump 42 , and is mixed with the liquid (NaOH liquid) in the pump chamber of the liquid ring pump 42 and discharged into the cleaning tank 53 . The sulfur vapor is cooled to become solid precipitation and the bottom of the cleaning tank 53, the hydrogen sulfide gas is neutralized by the lye, and a small amount of unneutralized exhaust gas is adsorbed by the activated carbon in the carbon tank. During the discharge process, the sulfur vapor will partially cool down and become solid and adhere to the suction pipe. By heating the suction pipe regularly, the sulfur in the pipe can be liquefied and discharged from the suction pipe by its own weight.

The liquid in the cleaning tank 53 enters the pump cavity of the liquid ring pump 42 after being filtered by the filter 44 . The liquid level in the cleaning tank 53 corresponds to the central position in the pump chamber. If the liquid level is too low or too high, the normal use of the liquid ring pump 42 will be affected. Therefore, there are high and low float switches in the cleaning tank 53, and the high and low signals of the liquid level will send an alarm and a pump stop signal to the system.

Claims (8)

1. a tail gas treatment device of a sulfur loading tail gas recovery processing system, is characterized in that, comprises liquid ring pump tail gas treatment module and tail gas aftertreatment module; Liquid ring pump tail gas treatment module comprises liquid ring pump, and tail gas aftertreatment module comprises cleaning Tank, the cleaning tank is filled with lye; In the liquid ring pump, the air inlet sucks the loading overflow tail gas that overflows from the tank mouth of the sulfur tanker when the sulfur tanker is filled with liquid sulfur through the air inlet pipe, and the liquid inlet is communicated with the cleaning tank through the liquid inlet conveying pipeline. , the outlet is connected to the cleaning tank through the air supply pipeline, and the connection point between the liquid inlet pipeline and the cleaning tank is located below the liquid level of the lye in the cleaning tank, and the connection point between the air supply pipeline and the cleaning tank is located in the cleaning tank. above the liquid level; In the cleaning tank, a sewage pipe is installed at the bottom of the tank, and a sewage valve is installed on the sewage pipe; The exhaust gas treatment device further includes an exhaust gas pre-treatment module; the exhaust gas pre-treatment module includes an intake pipe; The suction pipe is a steam jacketed pipe with inclined section and vertical section; The inclination angle of the inclined section is less than 90°, and the upper end of the inclined section is connected with the side wall of the feeding pipe, the lower end is connected with one end of the vertical section, and the other end of the vertical section is equipped with a collection valve adjacent to the position; The vertical section is connected with the intake pipe by installing a tee joint; The interlayer of the suction pipe can input steam through the steam conveying pipe; the suction pipe can discharge the sulfur solid in the suction pipe to the collection cover at the end of the suction pipe by regularly passing steam; The feeding pipe is a vertically retractable rigid pipe, including a fixed main pipe and a slidable feeding pipe; Sliding feeding tube, including fixed sleeve and movable sleeve; The upper end of the fixed main pipe is fixed with the liquid sulfur conveying pipeline, and the lower end extends into the fixed casing. An annular gap with a length of d can be formed between the outer wall of the fixed main pipe and the inner wall of the fixed casing; and at the corresponding position of the annular gap, the fixed sleeve The pipe wall of the pipe is provided with an exhaust gas output interface; the inclined section of the suction pipe is communicated with the fixed casing through the exhaust gas output interface; Fixed sleeve, the upper end is fixed with the outer wall of the fixed main pipe, and the lower end extends into the movable sleeve; The movable sleeve has a sliding pair with the outer wall of the fixed sleeve, and the movable sleeve and the fixed sleeve are sealed at the position where the sliding pair is formed; in addition, the movable sleeve is assembled on the outer wall surface immediately adjacent to the lower end There are seals that can be sealingly connected to the tank mouth of the sulphur tanker. 2 . The tail gas treatment device of the sulfur loading tail gas recovery and treatment system according to claim 1 , wherein the inclined section and the vertical section of the suction pipe are both steam jacketed stainless steel pipes. 3 . 3. The tail gas treatment device of the sulfur loading tail gas recovery and treatment system according to claim 2, characterized in that, the blowdown pipe is connected to the flushing pipe by bypass; road connection. 4 . The tail gas treatment device of the sulfur loading tail gas recovery and treatment system according to claim 3 , wherein a liquid inlet valve is installed on the liquid inlet conveying pipeline; and an air supply valve is installed on the air supply pipeline. 5 . 5 . The tail gas treatment device of the sulfur loading tail gas recovery and treatment system according to claim 3 , wherein the height of the liquid level in the cleaning tank is equal to the center position of the pump cavity of the liquid ring pump. 6 . 6 . The tail gas treatment device of the sulfur loading tail gas recovery and treatment system according to claim 3 , wherein a high-level liquid level switch, a low-level liquid level switch and a pH value of the alkali solution in the cleaning tank are installed in the cleaning tank. 7 . pH sensor; When the lye liquid level in the cleaning tank triggers the high-level liquid level switch or the low-level liquid level switch, the corresponding liquid level signal can be fed back to the control box; the pH value signal of the lye liquid in the cleaning tank detected by the pH sensor can be fed back to the control box. box; The control box automatically controls the liquid ring pump to stop and sends an alarm signal by receiving the liquid level signal fed back by the high-level liquid level switch or the low-level liquid level switch; through the pH value signal fed back by the pH sensor, an alarm signal is sent to remind The lye in the cleaning tank is replaced; at the same time, the control box can automatically control the rotation speed of the liquid ring pump according to the pressure value of the overflow exhaust gas introduced into the inlet of the suction pipe. 7 . The tail gas treatment device of the sulfur loading tail gas recovery and treatment system according to claim 3 , wherein the top of the cleaning tank is equipped with a carbon canister, and the top of the carbon canister has an exhaust pipe. 8 . 8. A sulfur loading tail gas recovery and treatment system, characterized in that it has the tail gas treatment device according to any one of claims 1-7.

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