CN212904113U - Sulfur recovery tail gas sampling and detecting system - Google Patents
Sulfur recovery tail gas sampling and detecting system Download PDFInfo
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- CN212904113U CN212904113U CN202021971539.9U CN202021971539U CN212904113U CN 212904113 U CN212904113 U CN 212904113U CN 202021971539 U CN202021971539 U CN 202021971539U CN 212904113 U CN212904113 U CN 212904113U
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Abstract
The utility model provides a sulfur recovery tail gas sampling detecting system, include: a sampling box; the detection instrument is arranged in the sampling box; the heating device is arranged in the sampling box; the sampling pipeline is connected to the upstream of the detection instrument, and a sulfur remover is arranged on the sampling pipeline and is positioned in the sampling box; the return pipeline is connected with the downstream of the detection instrument and is provided with an air pump which is positioned in the sampling box; and one end of the purging pipeline is connected with a purging gas source, and the other end of the purging pipeline is connected between the sulfur remover and the detection instrument and is used for reversely purging solid sulfur accumulated in the sampling pipeline. The detection instrument, the sulfur remover and the air pump are all arranged in the sampling box, the sampling box is kept at a higher temperature through the heating device, unsaturated sulfur vapor can be prevented from being converted into saturated sulfur vapor, solid sulfur is prevented from being generated in a pipeline upstream and downstream of the sulfur remover, the detection instrument and the air pump, and meanwhile, after the system runs for a period of time, accumulated solid sulfur is reversely swept by the sweeping pipeline, so that the normal work of the detection system is ensured.
Description
Technical Field
The utility model relates to a sulfur recovery tail gas sampling detects technical field, concretely relates to sulfur recovery tail gas sampling detecting system.
Background
1/3 volume content H in combustor and reaction furnace in the process of sulfur recovery in the field of petrochemical industry2S is oxidized to SO 22/3 volume content of residual H2S and 1/3 volume content SO2Generating a Claus reaction to generate elemental sulfur, condensing the tail gas after the reaction to separate out liquid sulfur after secondary catalytic conversion and tertiary condensation, wherein the temperature is about 132 ℃ and the pressure is about 125 KPa. Wherein the tail gas contains H2S、SO2Sulfur vapor, CO2When the gas is equal, a detection instrument is arranged at the outlet of the final-stage condenser, the tail gas after the Claus reaction is detected in real time, and H in the tail gas is analyzed2S、SO2The detection result is used for accurately controlling the H of the combustion 1/3 volume content2S required air amount.
When the detection instrument works, unsaturated sulfur steam is needed, so that the pollution of a detection system caused by solid sulfur particles is avoided, and detection parts are damaged and detection data are distorted. In the sampling process, if the tracing temperature of the sulfur vapor is not enough, the sulfur vapor is solidified and accumulated in a sampling pipeline when the temperature is lower than 127 ℃, so that a sampling system is blocked, and a detection instrument is stopped. Therefore, between the main process line and the instrumentation, the sampled gas (sulfur-containing vapor) needs to be treated to ensure that no solid sulfur is precipitated.
In the prior art, a sulfur remover is usually arranged to remove sulfur and impurities in sample gas, the sulfur remover can reduce the temperature of the sample gas, unsaturated high-temperature sulfur vapor in the sample gas is changed into saturated sulfur vapor, most of the saturated sulfur vapor is changed into a liquid form and returns to a process pipeline under the action of gravity, and a filter screen is arranged in the sulfur remover and can intercept sulfur separated out from the sample gas.
However, the sulfur removal effect of the sulfur remover is not one hundred percent, and due to the temperature change, solid sulfur particles are still separated out from the sample gas in pipelines and detection instruments upstream and downstream of the sulfur remover, so that the pipelines and the detection instruments are blocked, and even the detection instruments are in fault shutdown. In addition, when the sulfur blockage phenomenon occurs in the pipeline, the online purging cannot be realized, and great trouble is brought to the sampling detection work.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tail gas sampling detecting system is retrieved to sulphur to still have solid-state sulphur to appear and cause pipeline and instrumentation to block up and the pipeline can't the problem of sweeping after blockking up in pipeline and the instrumentation of low reaches in the sulphur removal ware among the solution prior art.
In order to achieve the above object, the utility model provides a sulfur recovery tail gas sampling detecting system adopts following technical scheme:
a sulfur recovery tail gas sampling and detecting system comprises:
a sampling box;
the detection instrument is arranged in the sampling box;
the heating device is arranged in the sampling box and is used for keeping the temperature in the sampling box constant;
the sampling pipeline is connected with the upstream of the detection instrument and is used for being connected with a sampling pipe on the process pipeline, and a sulfur remover is arranged on the sampling pipeline and is positioned in the sampling box;
the backflow pipeline is connected to the downstream of the detection instrument and used for being connected with a sample return pipe on the process pipeline, and an air suction pump is arranged on the backflow pipeline and is positioned in the sampling box;
and one end of the purging pipeline is connected with a purging gas source, and the other end of the purging pipeline is connected between the sulfur remover and the detection instrument on the sampling pipeline and is used for reversely purging solid sulfur accumulated in the sampling pipeline.
The beneficial effects of the above technical scheme are that: the detection system comprises a sampling pipeline, a detection instrument and a backflow pipeline, wherein a sulfur remover is arranged on the sampling pipeline, and a suction pump is arranged on the backflow pipeline, so that under the action of the suction pump, gas in the process pipeline can sequentially enter the sampling pipeline, the sulfur remover, the detection instrument, the suction pump and the backflow pipeline through the sampling pipeline on the process pipeline, and finally flows back into the process pipeline through the backflow pipeline on the process pipeline.
Because the detection system also includes the sampling box, be provided with heating device in the sampling box, instrumentation, sulphur removal ware and aspiration pump all set up in the sampling box, heating device can make and keep in the sampling box at invariable temperature, just so can make and keep higher temperature in the sampling box, set this temperature to be higher than the transition temperature that sulphur vapour is from unsaturated to saturation, just can avoid unsaturated sulphur vapour to change into saturated sulphur vapour, and then avoid producing solid-state sulphur in pipeline, instrumentation and the aspiration pump of sulphur removal ware upper and lower reaches, the jam problem of parts such as pipeline, instrumentation has been solved, can guarantee instrumentation's normal work.
In addition, in order to ensure that even if solid sulfur is formed, the solid sulfur can be cleaned, the detection system also comprises a purging pipeline, one end of the purging pipeline is connected with a purging gas source, and the other end of the purging pipeline is connected between the sulfur remover and the detection instrument on the sampling pipeline, so that after the system runs for a period of time, the purging pipeline can be used for reversely purging the solid sulfur accumulated in the sampling pipeline, and the normal operation of the detection system is ensured.
Furthermore, a first control valve is arranged on the purging pipeline and connected with a time controller, and the time controller is used for controlling the first control valve to be opened after a set time interval and to be closed after the first control valve is opened for a certain time.
The beneficial effects of the above technical scheme are that: the time controller can control the first control valve to be opened after a set time interval and to be closed after the first control valve is opened for a certain time, so that automatic purging can be realized, the purging time interval and the purging duration are automatically controlled, and the use is more convenient.
Furthermore, a second control valve connected with the first control valve in parallel is further arranged on the purging pipeline, the second control valve is a manual control valve, a pressure sensor is connected between the sulfur remover and the detection instrument on the sampling pipeline, and the pressure sensor is used for detecting the pressure of the sample gas in the sampling pipeline so as to manually open the second control valve when the pressure of the sample gas exceeds a certain value.
The beneficial effects of the above technical scheme are that: the second control valve of manual control is further arranged on the purging pipeline, the second control valve and the first control valve are connected in parallel and do not interfere with each other during use, the pressure sensor used for detecting the sample gas pressure in the sampling pipeline is arranged on the sampling pipeline, and an operator can conveniently and manually open the second control valve to purge when the sample gas pressure exceeds a certain value. Set up the second control valve, after considering detecting system to move for a long time, automatic purge the module and can't realize better cleaning effect and cause the sample pipeline to block up, through the sample gas pressure in the monitoring sample pipeline this moment, when sample gas pressure is too high, it is serious to show to block up, and the air current is not smooth, and accessible manual control second control valve sweeps this moment. The second control valve and the first control valve are matched for use, and the double-insurance effect is achieved.
Further, the purge gas source comprises a nitrogen gas source communicated with the first control valve, the purge gas source further comprises a saturated steam gas source communicated with the second control valve, and the pressure of the saturated steam is greater than the pressure of the sample gas.
The beneficial effects of the above technical scheme are that: the first control valve is opened frequently, the blockage of the pipeline in the early working process is not serious, and only nitrogen is used; when the second control valve is started, the pipeline is seriously blocked, saturated steam is used at the moment, and the saturated steam with the pressure greater than the sample pressure can effectively blow away the blockage, so that a good blowing effect is realized.
Further, install the temperature sensor who is used for detecting the interior temperature of sample box on the sample box, be connected with temperature controller between temperature sensor and the heating device, temperature sensor transmits the detected signal for temperature controller, and temperature controller is used for regulating and control heating device's heating temperature.
The beneficial effects of the above technical scheme are that: through the monitoring of temperature sensor to and temperature controller's regulation and control, make things convenient for heating device to make and keep invariable temperature in the sample box.
Further, the sulphur removal ware is the jacketed sulphur removal ware, and the jacketed sulphur removal ware includes sulphur removal ware centre layer and is located the outside sulphur removal ware intermediate layer of sulphur removal ware centre layer, and the sulphur removal ware centre layer supplies the sample gas to pass through, and the sulphur removal ware intermediate layer is connected with cooling line, is used for circulating cooling medium in the cooling line to cool off the sample gas.
The beneficial effects of the above technical scheme are that: through jacketed desulfurizer, jacketed desulfurizer includes desulfurizer centre layer and desulfurizer intermediate layer, can conveniently utilize cooling medium to cool off sample gas, makes the sulphur impurity cooling of sample gas separate out through the mode of heat exchange.
Further, be provided with inlet flange and outlet flange on the sampling case, sulfur recovery tail gas sampling detecting system is still including being used for connecting the first ball valve between inlet flange and sample tube flange and being used for connecting the second ball valve between outlet flange and sample tube flange.
The beneficial effects of the above technical scheme are that: the inlet connecting flange and the outlet connecting flange are convenient for connection between the sampling box and the process pipeline, the first ball valve is arranged between the inlet connecting flange and the sampling pipe flange, the second ball valve is arranged between the outlet connecting flange and the sample returning pipe flange, the on-off of the sampling pipeline can be conveniently controlled through the first ball valve, and the on-off of the backflow pipeline can be conveniently controlled through the second ball valve.
Furthermore, first ball valve and second ball valve are the cover ball valve that presss from both sides, press from both sides the cover ball valve and include ball valve centre layer and be located the outside ball valve intermediate layer of ball valve centre layer, and ball valve centre layer supplies sample gas to pass through, and the ball valve intermediate layer is connected with the heat tracing pipeline, is used for circulation heat tracing medium in the heat tracing pipeline to heat sample gas.
The beneficial effects of the above technical scheme are that: first ball valve and second ball valve are and press from both sides the cover ball valve, press from both sides the cover ball valve and include ball valve centre layer and ball valve intermediate layer, and the ball valve intermediate layer lets in the heat tracing medium, can utilize the heat tracing medium to heat sample gas, makes the sulphur vapour in the sample gas keep unsaturated state, avoids sample gas at first ball valve and second ball valve internal cooling generation sulphur, causes the ball valve to block up.
Furthermore, the ball valve interlayers of the first ball valve and the second ball valve are connected in series, and the first ball valve and the second ball valve share a heat tracing pipeline.
The beneficial effects of the above technical scheme are that: simple structure and low cost investment.
Further, sulfur recovery tail gas sampling detecting system still includes the thief rod that is used for stretching into in the process line with the sample pipeline intercommunication, and the port of thief rod is the sample connection, and the sample connection is for being used for the bevel connection of the setting of dorsad air current direction.
The beneficial effects of the above technical scheme are that: make things convenient for the sample, and can avoid particulate matters such as dust in the tail gas to get into in the sample pipeline.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of a sulfur recovery tail gas sampling and detecting system of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment 2 of the system for sampling and detecting tail gas from sulfur recovery according to the present invention;
fig. 3 is the schematic structural diagram of embodiment 3 of the system for sampling and detecting tail gas from recovering sulfur in the present invention.
In the figure: 1-process piping; 2-sampling tube; 3-a first ball valve; 4-inlet connecting flange; 5-a heating device; 6-a sulphur removal device; 7-a temperature sensor; 8-a temperature controller; 9-a detection instrument; 10-a pressure sensor; 11-a time controller; 12-a first control valve; 13-a second control valve; 14-instrument wind inlet; 15-nitrogen inlet; 16-a suction pump; 17-instrument wind outlet; 18-an outlet connection flange; 19-a second ball valve; 20-a sample returning pipe; 21-heat tracing steam inlet; 22-heat tracing steam outlet; 23-a sampling box; 24-a sampling rod; 25-sample return rod.
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 embodiment 1 of well sulphur recovery tail gas sampling detecting system (hereinafter referred to as detecting system) is shown in fig. 1, including sampling case 23, be provided with heating device 5 and instrumentation 9 in the sampling case 23, heating device 5 sets up in the bottom of sampling case 23 for keep invariable temperature in making sampling case 23. The temperature sensor 7 for detecting the temperature in the sampling box 23 is installed at the top of the sampling box 23, the temperature controller 8 is connected between the temperature sensor 7 and the heating device 5, the temperature sensor 7 transmits a detection signal to the temperature controller 8, and the temperature controller 8 is used for regulating and controlling the heating temperature of the heating device 5.
Specifically, the sampling box 23 adopts a double-layer steel structure, and heat preservation rock wool is filled in the interlayer. The heating device 5 adopts an explosion-proof electric heater, the power of the explosion-proof electric heater is controlled by current, the constant temperature of the sampling box 23 is ensured to be about 150 ℃, and the temperature is higher than the transition temperature of sulfur vapor from unsaturated to saturated. The temperature controller 8 adopts a PID algorithm controller which is used as an input end of current control, and the temperature range is set to be 150-152 ℃. The temperature sensor 7 collects the internal temperature of the sampling box 23, and when the detected temperature is too high, the heating efficiency is too high, and the current intensity needs to be reduced by using a PID algorithm controller; when the temperature is detected to be too low (which is easy to appear in winter), solid sulfur is prevented from being separated out due to the fact that the temperature of the sample gas is too low, and the current intensity is increased by using a PID algorithm controller.
The detecting instrument 9 is in a complete machine explosion-proof form and is used for detecting H in the sample gas2S、SO2Sulfur vapor, CO2And the like. The detection system further comprises a sampling line connected upstream of the instrumentation 9 for connection with a sampling tube 2 on the process pipe 1, i.e. the piping and components before the instrumentation 9 constitute the sampling line, the sampling line comprising a desulfurizer 6, an inlet connection flange 4, a first ball valve 3 and a sampling rod 24. The detection system further comprises a return line connected downstream of the instrumentation 9 for connection to a return tube 20 on the process pipe 1, i.e. the lines and components behind the instrumentation 9 constitute a return line comprising the suction pump 16, the outlet connection flange 18, the second ball valve 19 and a return sampleA rod 25.
The sampling tube 2 is a branch tube welded and fixed on the process pipeline 1, and the top of the sampling tube 2 is provided with a sampling tube flange. Similarly, the sample return pipe 20 is also a branch pipe welded and fixed on the process pipeline 1, the sample return pipe 20 is located at the downstream of the sampling pipe 2, and the top of the sample return pipe 20 is provided with a sample return pipe flange.
The first ball valve 3 and the second ball valve 19 are both jacket ball valves, each jacket ball valve comprises a ball valve central layer and a ball valve interlayer positioned outside the ball valve central layer, sample gas passes through the ball valve central layer, the ball valve interlayers are connected with heat tracing pipelines, and heat tracing media are used for circulating in the heat tracing pipelines so as to heat the sample gas. And the ball valve interlayers of the first ball valve 3 and the second ball valve 19 are connected in series, and the first ball valve 3 and the second ball valve 19 share a heat tracing pipeline.
The heat tracing medium in this embodiment is heat tracing steam, which has a heat tracing steam inlet 21 and a heat tracing steam outlet 22, as shown in fig. 1. The first ball valve 3 and the second ball valve 19 are arranged to respectively control the on-off of the sampling pipeline and the return pipeline; two ball valves all adopt and press from both sides the cover ball valve, let in the ball valve intermediate layer of pressing from both sides the cover ball valve and accompany hot steam, can heat sample gas, make the sulphur vapour in the sample gas keep unsaturated state, avoid sample gas at first ball valve and second ball valve internal cooling to generate sulphur, cause the ball valve to block up.
The sampling rod 24 passes through the sampling pipe 2, and the top of the sampling rod is fixed on the sampling pipe flange and communicated with the first ball valve 3, and the bottom of the sampling rod extends to the right center of the process pipeline 1. The bottom port of the sampling rod 24 is a sampling port, the sampling port is an oblique port arranged back to the airflow direction, preferably an oblique port inclined by 45 degrees, and the sampling rod 24 is made of 316L stainless steel. Through setting up thief rod 24, can conveniently take a sample to the bevel connection dorsad air current direction can avoid particulate matters such as dust in the tail gas to get into in the sample pipeline.
Similarly, a sample return rod 25 extends through the sample return tube 20, is secured at its top to the sample return flange and communicates with the second ball valve 19, and extends at its bottom to the exact center of the process pipe 1.
The desulfurizer 6 is located the sampling box 23, is connected with the detection instrument 9 and the inlet connecting flange 4 through the conveying pipe, and the desulfurizer 6 is a jacketed desulfurizer, and the jacketed desulfurizer is a two-layer structure tank body, and comprises a desulfurizer central layer and a desulfurizer interlayer located outside the desulfurizer central layer, wherein the desulfurizer central layer is used for sample gas to pass through, the desulfurizer interlayer is connected with a cooling pipeline, and a circulating cooling medium is used in the cooling pipeline to cool the sample gas.
Specifically, the cooling medium in this embodiment is the instrument wind, and the tank body is locally cooled by the instrument wind. As shown in fig. 1, the cooling pipeline has an instrument wind inlet 14 and an instrument wind outlet 17, and the cooling pipeline is connected with the sulfur remover interlayer, and is fed into the sulfur remover interlayer through the instrument wind inlet 14 and exhausted to the atmosphere through the instrument wind outlet 17 in a high-inlet and low-outlet mode. The sample gas and the instrument air carry out heat exchange, and the temperature of the sample gas is cooled to about 20 ℃, so that the sulfur impurities in the sample gas are cooled and separated out. Meanwhile, in the center layer of the sulfur remover, fibrous substances are placed in a path through which the sampling gas passes, so that sulfur and other impurities separated out from the sampling gas after cooling are adsorbed by fibers and flow back to the process pipeline 1 in a liquid form under the action of gravity, and the pollutants are prevented from entering the detection instrument 9.
The air pump 16 is connected with an air extraction pipeline, as shown in fig. 1, the air extraction pipeline is provided with a nitrogen inlet 15, the air pump 16 uses nitrogen to provide a power source for the sampling system, and negative pressure is generated at a throat joint by utilizing the venturi management principle to ensure that the detected sample gas returns to the process pipeline 1. By adjusting the flow rate of the nitrogen gas, the detection time of the sample gas can be controlled. The suction pump 16 is located in the sampling box 23 and is connected to the test meter 9 and the outlet connection flange 18 via a delivery tube.
The detection system also comprises a purging pipeline, one end of the purging pipeline is connected with a purging gas source (not shown in the figure), and the other end of the purging pipeline is connected between the sulfur remover 6 and the detection instrument 9 on the sampling pipeline, namely, the conveying pipe between the sulfur remover 6 and the detection instrument 9, and is used for reversely purging solid sulfur accumulated in the sampling pipeline.
Specifically, a first control valve 12 and a second control valve 13 are arranged on the purge line in parallel, the first control valve 12 is connected with a time controller 11, and the time controller 11 is used for controlling the first control valve 12 to be opened after a set time interval and to be closed after being opened for a certain time. The source of purge gas comprises a source of nitrogen gas, preferably heated nitrogen gas, in communication with the first control valve 12. The first control valve 12 and the nitrogen gas source form an automatic purging module for automatically purging solid sulfur accumulated in the sampling pipeline, the automatic purging time interval is set to 4 hours/8 hours/12 hours, and the purging time is 5 minutes.
The second control valve 13 is a manual control valve, a pressure sensor 10 is connected between the desulfurizer 6 and the detecting instrument 9 on the sampling pipeline, that is, the pressure sensor 10 is connected on the conveying pipe between the desulfurizer 6 and the detecting instrument 9, and the pressure sensor 10 is located outside the sampling box 23 and is used for detecting the pressure of the sample gas in the sampling pipeline. The purge gas source further comprises a saturated vapor source communicated with the second control valve 13, and the pressure of the saturated vapor is greater than the pressure of the sample gas. Preferably, medium-pressure saturated steam is used as a gas source, the second control valve 13 and the saturated steam gas source form a manual purging module, when the detection value of the pressure sensor is greater than 150Kpa, the second control valve 13 is manually opened, the pipeline is purged by using the medium-pressure saturated steam, and the fault that the pipeline is blocked by solid sulfur is eliminated.
The first control valve 12 is opened frequently, so that the blockage of the pipeline in the working process in the previous period is not serious, and nitrogen is used; when the second control valve 13 is started, the pipeline is seriously blocked, saturated steam is used at the moment, and the saturated steam with the pressure greater than the sample pressure can effectively blow away the blockage, so that a good blowing effect is realized. After purging for a certain time, the second control valve 13 is closed, and if the pressure at this time is less than 130Kpa, the solid sulfur particles and impurities in the sampling pipeline are purged completely, and the detection system can be used normally.
When the detection system of the utility model is used, in the sulfur remover 6, the unsaturated high-temperature sulfur vapor in the conveying pipe is firstly cooled from 145 ℃ to 129 ℃ to become saturated sulfur vapor, most of the saturated sulfur vapor in the sample gas becomes a liquid form, and the unsaturated high-temperature sulfur vapor returns to the process pipeline under the action of gravity; the 129 c saturated sulfur vapor, which is then pumped by the pump 16, is heated again in the transfer line to 145 c to become unsaturated sulfur vapor, so that the sample gas does not contaminate the meter 9 when flowing through the meter 9.
Because the detecting instrument, the desulfurizer and the air pump are all arranged in the sampling box, the temperature in the sampling box is maintained at about 150 ℃, and the temperature is far higher than the transition temperature of sulfur vapor from unsaturated to saturated, solid sulfur is prevented from being generated in pipelines, detecting instruments and air pumps at the upper and lower reaches of the desulfurizer, the problem of blockage of the pipelines, the detecting instruments and other parts is solved, and the normal work of the detecting instruments can be ensured.
In addition, in order to ensure that even if solid sulfur is formed, the solid sulfur can be cleaned, the detection system also comprises an automatic purging module and a manual purging module, automatic purging and manual purging are realized in the operation process of the system, and the solid sulfur accumulated in the sampling pipeline is purged by utilizing reverse airflow to ensure the normal operation of the detection system.
Compared with the prior art, the utility model adopts the steam jacket heat tracing, automatic heating, automatic and manual purging and other modes, so that the temperature of the sample gas can be improved at the initial sampling stage, and the liquid sulfur is prevented from blocking the pipeline site; the temperature of the sampling box can be automatically controlled, and the gaseous sulfur is ensured to be in an unsaturated state in real time; the configured purging system can clean sulfur particles in the pipeline under the condition that the sampling pipeline is blocked, ensure the pipeline to be smooth and has strong adaptability to working conditions; and the sampled gas and the liquid sulfur finally flow back to the process pipeline, so that a closed loop is realized, and independent discharge is not needed.
The utility model discloses embodiment 2 of well sulphur recovery tail gas sampling detecting system does: as shown in fig. 2, the difference from embodiment 1 is that no sample return lever is provided.
The utility model discloses embodiment 3 of well sulphur recovery tail gas sampling detecting system does: as shown in fig. 3, the difference from embodiment 1 is that neither a sampling rod nor a sample return rod is provided.
The utility model discloses embodiment 4 of well sulphur recovery tail gas sampling detecting system does: the difference from the embodiment 1 is that the ball valve interlayers of the first ball valve and the second ball valve are not connected, and the two ball valves have a heat tracing pipeline respectively.
The utility model discloses well sulfur recovery tail gas sampling detecting system's embodiment 5 does: the difference from embodiment 1 is that the heat trace medium in the heat trace line may also be hot water.
The utility model discloses embodiment 6 of well sulphur recovery tail gas sampling detecting system does: the difference from embodiment 1 is that the first ball valve and the second ball valve are not jacket ball valves, but ordinary shut-off valves without a sandwich.
The utility model discloses embodiment 7 of well sulphur recovery tail gas sampling detecting system does: the difference with embodiment 1 lies in, does not set up first ball valve and second ball valve, and the import flange of sampling case is direct with sampling tube flange joint, and export flange is direct with sample return pipe flange joint.
The utility model discloses embodiment 8 of well sulphur recovery tail gas sampling detecting system does: the difference from example 1 is that the sampling tank is not flanged to the sampling tube and the sample return tube, but is connected to a joint.
The utility model discloses embodiment 9 of well sulphur recovery tail gas sampling detecting system does: the difference from embodiment 1 is that the cooling medium in the cooling line may also be cold water.
The utility model discloses embodiment 10 of well sulphur recovery tail gas sampling detecting system does: the difference from the example 1 is that the desulfurizer is not a jacketed desulfurizer but a common desulfurizer without a jacket, and a cooling jacket can be covered outside the desulfurizer and is communicated with a cooling pipeline.
The utility model discloses embodiment 11 of well sulphur recovery tail gas sampling detecting system does: the difference from embodiment 1 is that the heating device is heated at a heating temperature set by itself without providing a temperature sensor and a temperature controller.
The utility model discloses well sulfur recovery tail gas sampling detecting system's embodiment 12 does: the difference from the embodiment 1 is that the gas source communicated with the first control valve can also be saturated steam, and the gas source communicated with the second control valve can also be heated nitrogen.
The utility model discloses embodiment 13 of well sulphur recovery tail gas sampling detecting system does: the difference from embodiment 1 is that the second control valve is not provided, and the automatic purge may be performed only by the first control valve.
The utility model discloses embodiment 14 of well sulphur recovery tail gas sampling detecting system does: the difference from embodiment 1 is that only one control valve is provided on the purge line, and the control valve is a manual control valve, and the opening time is manually controlled.
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. The utility model provides a sulfur recovery tail gas sampling detecting system which characterized in that includes:
a sampling box;
the detection instrument is arranged in the sampling box;
the heating device is arranged in the sampling box and is used for keeping the temperature in the sampling box constant;
the sampling pipeline is connected with the upstream of the detection instrument and is used for being connected with a sampling pipe on the process pipeline, and a sulfur remover is arranged on the sampling pipeline and is positioned in the sampling box;
the backflow pipeline is connected to the downstream of the detection instrument and used for being connected with a sample return pipe on the process pipeline, and an air suction pump is arranged on the backflow pipeline and is positioned in the sampling box;
and one end of the purging pipeline is connected with a purging gas source, and the other end of the purging pipeline is connected between the sulfur remover and the detection instrument on the sampling pipeline and is used for reversely purging solid sulfur accumulated in the sampling pipeline.
2. The sulfur recovery tail gas sampling and detecting system according to claim 1, wherein the purging line is provided with a first control valve, the first control valve is connected with a time controller, and the time controller is used for controlling the first control valve to be opened after a set time interval and to be closed after being opened for a certain time.
3. The sulfur recovery tail gas sampling and detecting system according to claim 2, wherein the purging line is further provided with a second control valve connected with the first control valve in parallel, the second control valve is a manual control valve, a pressure sensor is connected between the sulfur remover and the detecting instrument on the sampling line, and the pressure sensor is used for detecting the pressure of the sample gas in the sampling line so as to manually open the second control valve when the pressure of the sample gas exceeds a certain value.
4. The sulfur recovery tail gas sampling and detecting system of claim 3, wherein the purge gas source comprises a nitrogen gas source in communication with the first control valve, the purge gas source further comprises a saturated steam gas source in communication with the second control valve, and the pressure of the saturated steam is greater than the pressure of the sample gas.
5. The sulfur recovery tail gas sampling and detecting system according to any one of claims 1 to 4, wherein a temperature sensor for detecting the temperature in the sampling box is mounted on the sampling box, a temperature controller is connected between the temperature sensor and the heating device, the temperature sensor transmits a detection signal to the temperature controller, and the temperature controller is used for regulating and controlling the heating temperature of the heating device.
6. The sulfur recovery tail gas sampling and detecting system according to any one of claims 1 to 4, wherein the desulfurizer is a jacketed desulfurizer, the jacketed desulfurizer comprises a center layer of the desulfurizer and a desulfurizer interlayer located outside the center layer of the desulfurizer, the center layer of the desulfurizer is used for sample gas to pass through, the desulfurizer interlayer is connected with a cooling pipeline, and a cooling medium is used for flowing through the cooling pipeline to cool the sample gas.
7. The sulfur recovery tail gas sampling and detecting system according to any one of claims 1 to 4, wherein the sampling tank is provided with an inlet connecting flange and an outlet connecting flange, and the sulfur recovery tail gas sampling and detecting system further comprises a first ball valve for connecting between the inlet connecting flange and the sampling pipe flange, and a second ball valve for connecting between the outlet connecting flange and the sample returning pipe flange.
8. The sulfur recovery tail gas sampling and detecting system according to claim 7, wherein the first ball valve and the second ball valve are jacketed ball valves, each jacketed ball valve comprises a ball valve central layer and a ball valve interlayer positioned outside the ball valve central layer, the ball valve central layer is used for sample gas to pass through, the ball valve interlayer is connected with a heat tracing pipeline, and a heat tracing medium is used for flowing through the heat tracing pipeline to heat the sample gas.
9. The sulfur recovery tail gas sampling and detecting system of claim 8, wherein the ball valve interlayers of the first ball valve and the second ball valve are connected in series, and the first ball valve and the second ball valve share a heat tracing pipeline.
10. The sulfur recovery tail gas sampling and detecting system according to any one of claims 1 to 4, further comprising a sampling rod communicated with the sampling pipeline and extending into the process pipeline, wherein a port of the sampling rod is a sampling port, and the sampling port is an oblique port arranged in a direction away from the gas flow.
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| CN202021971539.9U CN212904113U (en) | 2020-09-10 | 2020-09-10 | Sulfur recovery tail gas sampling and detecting system |
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| CN202021971539.9U CN212904113U (en) | 2020-09-10 | 2020-09-10 | Sulfur recovery tail gas sampling and detecting system |
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