CN211478174U - Hydrogen sulfide treating agent evaluation device - Google Patents
Hydrogen sulfide treating agent evaluation device Download PDFInfo
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- CN211478174U CN211478174U CN201921334303.1U CN201921334303U CN211478174U CN 211478174 U CN211478174 U CN 211478174U CN 201921334303 U CN201921334303 U CN 201921334303U CN 211478174 U CN211478174 U CN 211478174U
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Abstract
The utility model discloses a hydrogen sulfide treating agent evaluation device, which comprises a hydrogen sulfide air inlet device, a reaction device, a detection device, a tail gas absorption device and a purging device, wherein the hydrogen sulfide air inlet device and the purging device are connected with a reaction device air inlet pipe; the reaction kettle can realize temperature change adjustment and fully adapt to the reaction conditions and process of the hydrogen sulfide treating agent; the tail gas absorption device is provided with a buffer bottle, so that the absorption liquid is effectively prevented from being sucked back into the reaction kettle; can also realize hydrogen sulfide reaction gas through this scheme and sweep gaseous simple switching, improve detection efficiency and accuracy, increase and detect the security, avoid producing unnecessary pollution.
Description
Technical Field
The utility model belongs to the technical field of hydrogen sulfide treatment agent detects, especially, relate to a hydrogen sulfide treatment agent evaluation device.
Background
Hydrogen sulfide is a toxic gas with putrefactive odor and has great harm to the environment and human health, so that the national regulation regulates the maximum allowable concentration of hydrogen sulfide to be 150mg/m3Hydrogen sulfide (H)2S) becomes an important component of associated gas of oil-gas reservoirs, and most oil fields in China have hydrogen sulfide pollution and harm. Hydrogen sulfide gas can form weak acid when dissolved in water, can react with a plurality of metals, and can generate hydrogen embrittlement (including Hydrogen Bubbling (HB) and hydrogen induced cracking (HC)) damage, Sulfide Stress Corrosion Cracking (SSCC) and electrochemical weightlessness corrosion on the metals, thereby causing the sudden disconnection of an underground casing, the failure of a wellhead device, the explosion of a ground instrument and the like, and even possibly causing the out-of-control blowout and serious fire accidents in serious cases. Therefore, research on measures for ensuring the life and property safety of field personnel, preventing the occurrence of poisoning accidents of hydrogen sulfide gas, reducing the corrosion of hydrogen sulfide to drilling tools, sleeves and the like and strengthening the prevention and treatment of toxic and harmful gas hydrogen sulfide becomes urgent.
For the recovery treatment of hydrogen sulfide, at present, China generally adopts a relatively mature Claus method and an absorption oxidation method, wherein the recovered sulfur is taken as a main technology, but the Claus method has large investment, low output and high operation cost, and sodium hydrogen radon liquid can be adopted to absorb hydrogen sulfide to prepare sodium sulfide. In order to research the effect of the hydrogen sulfide treating agent, an evaluation device can be used for detecting the effect of the hydrogen sulfide treating agent, and the detection device of the hydrogen sulfide treating agent in the prior art has the following problems: the detection device is too simple and crude, and the connection tightness of glassware is poor; the concentration of hydrogen sulfide introduced into the reactor cannot be quantified; the concentration of the residual hydrogen sulfide cannot be rapidly detected in the reaction process; no treatment measures for residual hydrogen sulfide are set; the detection device generates negative pressure, so that residual liquid of residual hydrogen sulfide can easily flow back to the reaction kettle.
The evaluation of the hydrogen sulfide desulfurization agent does not meet the national or industrial standard, the effect of the hydrogen sulfide inhibitor cannot be effectively judged, and the effects of various hydrogen sulfide inhibitors cannot be compared well. The prior patents CN107831267A and CN108318550A both disclose methods for detecting and evaluating hydrogen sulfide or a hydrogen sulfide treating agent, but both show the effect of the inhibitor simply by the reduction of hydrogen sulfide, and do not consider the treatment differences caused by environmental factors such as the usage amount of the inhibitor and temperature change, and cannot objectively and accurately show the treatment function of the hydrogen sulfide inhibitor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a hydrogen sulfide treating agent evaluation device.
The utility model discloses a realize through following technical scheme:
a hydrogen sulfide treating agent evaluation device comprises a hydrogen sulfide gas inlet device, a reaction device, a detection device, a tail gas absorption device and a blowing device, wherein the hydrogen sulfide gas inlet device and the blowing device are connected with a gas inlet pipe of the reaction device, and a gas outlet pipe of the reaction device is respectively connected with the detection device and the tail gas treatment device;
the tail gas treatment device comprises a buffer bottle, a first-stage absorption bottle and a second-stage absorption bottle which are connected in sequence, wherein the buffer bottle is a closed empty bottle, the first-stage absorption bottle is a closed bottle containing a hydrogen sulfide absorbent, and the second-stage absorption bottle is an open bottle or a bottle provided with a tail gas outlet and containing the hydrogen sulfide absorbent.
Preferably, the hydrogen sulfide gas inlet device and the purging device are connected with a gas inlet pipe of the reaction device through a gas inlet tee joint, and the detection device and the tail gas treatment device are connected with a gas outlet pipe of the reaction device through a gas outlet tee joint.
Preferably, the reaction device comprises a reaction kettle and a temperature control device, the temperature control device comprises a liquid interlayer wrapping the reaction kettle, a circulator and a circulating pipe, and the circulating pipe connects the liquid interlayer and the circulator to form a through annular flow path;
preferably, the inlet end of the circulating pipe connected with the liquid interlayer is arranged at the bottom of the liquid interlayer, and the outlet end of the circulating pipe connected with the liquid interlayer is arranged at the top of the liquid interlayer.
Preferably, the hydrogen sulfide gas inlet device is a hydrogen sulfide gas cylinder, the purging device is an air gas cylinder, and the detection device is a gas chromatograph.
Preferably, the reaction device is provided with a pressure gauge and a thermometer, and the air inlet pipe of the reaction device is provided with a flowmeter.
Preferably, a hydrogen sulfide air inlet valve is arranged at the downstream of the hydrogen sulfide air inlet device, a purging valve is arranged at the downstream of the purging device, and the hydrogen sulfide air inlet valve and the purging valve are arranged at the upstream of the air inlet tee joint;
the upstream of the detection device is provided with a detection valve, the upstream of the tail gas treatment device is provided with a first tail gas valve, and the detection valve and the first tail gas valve are arranged at the downstream of the gas outlet tee joint.
Preferably, the device further comprises a control cabinet, wherein a control circuit and a control panel which are connected with each other are arranged in the control cabinet, and the control circuit is connected with a pressure gauge, a thermometer, a flow meter, an air inlet tee joint, an air outlet tee joint, a hydrogen sulfide air inlet valve, a purging valve, a detection valve, a first exhaust valve and a detection device.
Preferably, a second tail gas valve is arranged between the first absorption bottle and the second absorption bottle and is connected with the control circuit.
The utility model has the advantages and positive effects that:
the reaction kettle can realize temperature change adjustment and fully adapt to the reaction conditions and process of the hydrogen sulfide treating agent; the tail gas absorption device is provided with a buffer bottle, so that the absorption liquid is effectively prevented from being sucked back into the reaction kettle; can also realize hydrogen sulfide reaction gas through this scheme and sweep gaseous simple switching, improve detection efficiency and accuracy, increase and detect the security, avoid producing unnecessary pollution.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure:
11. reaction kettle 12, liquid interlayer 13 and circulating pipe
14. Circulator 21, hydrogen sulfide gas cylinder 22 and hydrogen sulfide gas inlet valve
31. Air cylinder 32, purge valve 41, and gas chromatograph
42. Detection valve 51, buffer bottle 52 and primary absorption bottle
53. A secondary absorption bottle 54, a first tail gas valve 55 and a second tail gas valve
61. Air inlet tee joint 62, air outlet tee joint 7 and flowmeter
8. Pressure gauge 9, thermometer
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
Example 1 evaluation apparatus for Hydrogen sulfide treating agent
As shown in figure 1, a hydrogen sulfide treating agent evaluation device comprises a hydrogen sulfide air inlet device, a reaction device, a detection device, a tail gas absorption device and a purging device, wherein the hydrogen sulfide air inlet device and the purging device are connected with a reaction device air inlet pipe, and a reaction device air outlet pipe is respectively connected with the detection device and the tail gas treatment device.
Reaction unit is used for carrying out the reaction of hydrogen sulfide and hydrogen sulfide treating agent, and reaction unit includes reation kettle 11 and temperature control device, and the watch glass has been placed to reation kettle 11 bottom, places the hydrogen sulfide treating agent, and during hydrogen sulfide entered into reation kettle 11, by hydrogen sulfide treating agent reaction consumption, the evaluation reation kettle 11 export discharge hydrogen sulfide volume to the effect of reflection hydrogen sulfide treating agent. The temperature control device comprises a liquid interlayer 12 wrapping the reaction kettle 11, a circulator 14 and a circulating pipe 13, the interlayer is arranged outside the reaction kettle 11 and loaded with water or other liquid to form the liquid interlayer 12, the circulating pipe 13 connects the liquid interlayer 12 with the circulator 14 to form a through annular flow path, so that the water or other liquid flows in the liquid interlayer 12, the circulator 14 and the circulating pipe 13 in a forward direction, the inlet end of the circulating pipe 13 connected with the liquid interlayer 12 is arranged at the bottom of the liquid interlayer 12, the outlet end of the circulating pipe 13 connected with the liquid interlayer 12 is arranged at the top of the liquid interlayer 12, the reaction process in the reaction kettle 11 can release heat, the reaction process in the reaction kettle 11 can be influenced by the change of the temperature, and the ambient temperature in the reaction kettle 11 can be effectively controlled by the temperature control device; be equipped with manometer 8 and thermometer 9 on the reaction unit, can be in real time reaction kettle 11 pressure and temperature, be equipped with flowmeter 7 in the reaction unit intake pipe, measure the volume that hydrogen sulfide got into, the intake pipe export stretches into 11 bottoms of reaction kettle, makes it can read the efficient and react with the hydrogen sulfide treating agent soon.
The hydrogen sulfide gas inlet device is a hydrogen sulfide gas cylinder 21, the purging device is an air gas cylinder 31, the hydrogen sulfide gas inlet device and the purging device are connected with a reaction device gas inlet pipe through a gas inlet tee 61, a hydrogen sulfide gas inlet valve 22 is arranged at the downstream of the hydrogen sulfide gas inlet device, a purging valve 32 is arranged at the downstream of the purging device, and the hydrogen sulfide gas inlet valve 22 and the purging valve 32 are arranged at the upstream of the gas inlet tee 61; when the evaluation reaction needs to be carried out, the hydrogen sulfide gas inlet valve 22 is opened, the purging valve 32 is closed, the hydrogen sulfide enters the reaction kettle 11 for reaction, after the reaction is finished, the hydrogen sulfide gas inlet valve 22 is closed, the purging valve 32 is opened, and the air in the air cylinder 31 purges the whole pipeline and the reaction kettle 11, so that the influence of residual hydrogen sulfide on the next evaluation result is avoided.
The detection device is a gas chromatograph 41, hydrogen sulfide enters the reaction kettle 11 and is treated by the hydrogen sulfide treating agent, the participated hydrogen sulfide is discharged through an air outlet pipe of the reaction kettle 11, the participated gas is detected by the gas chromatograph 41, the residual amount of the hydrogen sulfide is calculated, and the amount of the hydrogen sulfide entering the reaction kettle 11 is compared with the flow meter 7, so that the treatment effect of the hydrogen sulfide treating agent is calculated.
The tail gas treatment device comprises a buffer bottle 51, a first-stage absorption bottle 52 and a second-stage absorption bottle 53 which are connected in sequence, wherein the buffer bottle 51 is a closed empty bottle, the first-stage absorption bottle 52 is a closed bottle containing a hydrogen sulfide absorbent, and the second-stage absorption bottle 53 is an open bottle or a bottle provided with a tail gas outlet and containing the hydrogen sulfide absorbent. When the closed empty bottle can avoid generating negative pressure, the hydrogen sulfide absorbent in the primary absorption bottle 52 is sucked back, and the sucked absorbent is stored in the buffer bottle 51 to avoid the absorbent entering the reaction kettle 11. The hydrogen sulfide in the tail gas is reacted by the first-stage absorption bottle 52 and the second-stage absorption bottle 53, the environment pollution caused by the discharge is avoided, the first-stage absorption bottle 52 is a closed bottle, the incompletely absorbed hydrogen sulfide enters the second-stage absorption bottle 53 to continue the reaction, and the second-stage absorption bottle 53 is an open bottle or a closed bottle provided with an exhaust pipe. The hydrogen sulfide absorbent is sodium hydroxide solution.
The detection device and the tail gas treatment device are connected with an air outlet pipe of the reaction device through an air outlet tee 62, a detection valve 42 is arranged at the upstream of the detection device, a first tail gas valve 54 is arranged at the upstream of the tail gas treatment device, the detection valve 42 and the first tail gas valve 54 are arranged at the downstream of the air outlet tee 62, a second tail gas valve 55 is arranged between the first absorption bottle and the second absorption bottle, the first tail gas valve 54 is closed, the detection valve 42 is opened in the reaction process, and the residual amount of the hydrogen sulfide is detected; when the reaction is completed and purging is performed, the check valve 42 is closed, the first exhaust valve 54 and the second exhaust valve 55 are opened, and the residual hydrogen sulfide is discharged and treated to avoid discharging into the environment.
The hydrogen sulfide gas-liquid separation device is characterized by further comprising a control cabinet, wherein a control circuit and a control panel are arranged in the control cabinet and are connected with each other, the control circuit is connected with a pressure gauge 8, a thermometer 9, a flow meter 7, a gas inlet tee 61, a gas outlet tee 62, a hydrogen sulfide gas inlet valve 22, a purging valve 32, a detection valve 42, a first exhaust valve 54, a second exhaust valve 55 and a detection device, the evaluation process is controlled through the control panel, and the operation is convenient and rapid. The reaction kettle 11 can be provided with a sealing cover with a transparent observation window, so that an operator can observe the reaction process conveniently.
When the device is used, the purging valve 32, the first tail gas valve 54 and the second tail gas valve 55 are closed through the control panel, the hydrogen sulfide gas inlet valve 22 and the detection valve 42 are opened, the hydrogen sulfide gas cylinder 21 introduces hydrogen sulfide into the reaction kettle 11 to react with a hydrogen sulfide treating agent in the reaction kettle 11, the circulator 14 is opened, the liquid interlayer 12 continuously flows in the circulating pipe 13, redundant heat in the reaction kettle 11 is taken away, and the reaction kettle 11 is kept at a constant temperature; the residual tail gas of the reaction flows out through an air outlet pipe of the reaction kettle 11, the content of hydrogen sulfide in the tail gas is detected through a gas chromatograph 41, the treatment effect of the hydrogen sulfide treatment agent is calculated through comparison with a flow meter 7 arranged at an inlet of the reaction kettle 11, after the evaluation is finished, a hydrogen sulfide air inlet valve 22 and a detection valve 42 are closed, a purging valve 32 is opened, a first tail gas valve 54 and a second tail gas valve 55 are used for introducing air into the reaction kettle 11, the hydrogen sulfide in a pipeline is discharged, the tail gas with residual hydrogen sulfide is discharged from an outlet of the reaction kettle 11 and sequentially enters a buffer bottle 51, a first absorption bottle and a second absorption bottle are used for absorbing the residual hydrogen sulfide through sodium hydroxide solutions in the first absorption bottle and the second absorption bottle, the whole evaluation process is finished, the hydrogen sulfide treatment agent in the reaction kettle 11 is replaced, and the next evaluation process can be carried out.
Example 2 evaluation method of Hydrogen sulfide treating agent
A hydrogen sulfide inhibitor evaluation method comprises the steps of putting a hydrogen sulfide inhibitor into a hydrogen sulfide inhibitor evaluation device, and detecting the content of hydrogen sulfide in exhaust gas to show the effect of the hydrogen sulfide inhibitor after introducing hydrogen sulfide, wherein the method can be used for natural gas hydrogen sulfide and oil-gas-water hydrogen sulfide;
the method comprises the following specific steps:
the method comprises the following steps: introducing nitrogen to detect whether the hydrogen sulfide inhibitor evaluation device leaks gas or not;
step two: weighing a certain amount of M hydrogen sulfide inhibitor, putting the hydrogen sulfide inhibitor into a reaction kettle, setting the flow Q, setting the ventilation time T, and introducing C with known concentration0Sampling on time after the hydrogen sulfide is detected, and detecting the concentration C of the hydrogen sulfide in the tail gastCalculating the medicament selection concentration W;
step three: after the reaction is finished, introducing nitrogen into the hydrogen sulfide inhibitor evaluation device, and introducing all residual hydrogen sulfide in the hydrogen sulfide inhibitor evaluation device into a sodium hydroxide solution;
controlling the reaction temperature to be constant in the second step, wherein the reaction temperature is 50-70 ℃; the reaction temperature can be specifically selected to be 50 ℃, 60 ℃ or 70 ℃.
Wherein, the analysis method of the concentration of the hydrogen sulfide is GB/T14678-:
in the formula: c0Initial concentration entering hydrogen sulfide kettle body, mg/L;
Ctend concentration after a period of reaction time, mg/L, into the hydrogen sulfide kettle.
The volume V of hydrogen sulfide in the kettle body is as follows:
formula (2) of Q x T
In the formula: v is the volume of hydrogen sulfide in the kettle body, L;
q is the flow of hydrogen sulfide, L/min;
and T is the time for hydrogen sulfide to enter the kettle body, and min.
The medicament selection concentration W is as follows:
in the formula: m-the mass of the added agent, mg;
Qsteam generatorWhen selecting hydrogen sulfide in natural gas, the flow is L/min;
t is the time for hydrogen sulfide to enter the kettle body, min;
Wsteam generator-final hydrogen sulphide inhibitor concentration evaluated, mg/L.
Or
In the formula: m-the mass of the added agent, mg;
VoilWhen natural gas crude oil is selected, the volume of the crude oil is L;
Woil-final hydrogen sulphide inhibitor concentration evaluated, mg/L.
The specific operation steps during detection are as follows:
(1) leakage testing: introducing a certain amount of nitrogen, building pressure, checking whether the process has air leakage, and if the process has air leakage, checking the circuit backwards to find out leakage points and prevent other leakage;
(2) blank experiment: directly passing through standard gas with a certain concentration, receiving the gas, and detecting the concentration of hydrogen sulfide; this experiment was used to deduct hydrogen sulfide adsorbed in the device in the absence of the agent;
(3) primary screening concentration: selecting 150mg/m3Weighing a certain mass of a chemical (for example, 0.1g, 0.5g) with hydrogen sulfide gas at a concentration as a primary screening object; adjusting the hydrogen sulfide concentration screening instrument, setting the flow Q to be 2L/min, setting the aeration time to be 2min, introducing 4L hydrogen sulfide gas as before, and controlling the reaction temperature to be constant, wherein the reaction temperature is 50-70 ℃, namely, starting sampling. Sampling is carried out for 1min, 2min, 4min and 6min after the ventilation is finished, the concentration of the hydrogen sulfide is detected by gas chromatography, and the concentration of the hydrogen sulfide is recorded.
(4) And (3) removing gas, flushing nitrogen into the container, introducing the hydrogen sulfide gas into the sodium hydroxide solution without bubbles, and starting the next group of experiments after the reaction is finished.
The treatment effect of the hydrogen sulfide inhibitor was evaluated by the above procedure using the hydrogen sulfide inhibitor, comparing the treatment effects of YFTCLG-202 and YFTCLG-206 for the two agents, as described in example 3 and example 4.
Example 3 evaluation experiment for treatment of natural gas hydrogen sulfide
Firstly, processing natural gas hydrogen sulfide
Selecting natural gas hydrogen sulfide with concentration of 50mg/m3、150mg/m3、1500mg/m3The temperatures were 50 ℃, 60 ℃ and 70 ℃.
The specific operation steps are as follows:
(1) leakage testing: introducing a certain amount of nitrogen, building pressure, checking whether the process has air leakage, and if the process has air leakage, checking the circuit backwards to find out leakage points and prevent other leakage;
(2) blank experiment: directly passing through standard gas with a certain concentration, receiving the gas, and detecting the concentration of hydrogen sulfide;
(3) primary screening concentration: selecting hydrogen sulfide gas with corresponding concentration as a primary screening object, and weighing a certain mass of medicament; adjusting the hydrogen sulfide concentration screening instrument, setting the flow Q, setting the ventilation time T, introducing natural gas hydrogen sulfide, controlling the reaction temperature to be constant, and starting sampling. Sampling is carried out at each time point after the ventilation is finished, the concentration of the hydrogen sulfide is detected by gas chromatography, and the concentration of the hydrogen sulfide is recorded.
(4) And (3) removing gas, flushing nitrogen into the container, introducing the hydrogen sulfide gas into the sodium hydroxide solution without bubbles, and starting the next group of experiments after the reaction is finished.
The data collected were processed according to the formulas 1-4, 50mg/m3The evaluation process of the hydrogen sulfide desulfurization agent is shown in tables 1 and 2; 150mg/m3The evaluation process of the hydrogen sulfide desulfurization agent is shown in tables 3 and 4; 1500mg/m3The evaluation results of hydrogen sulfide desulfurization are shown in tables 5 and 6.
TABLE 150mg/m3Evaluation results of Hydrogen sulfide removal Rate
TABLE 250 mg/m3Evaluation results of Hydrogen sulfide desulfurization agent
The content of hydrogen sulfide in natural gas is 50mg/m3The evaluation result of the desulfurizing agent shows that when the concentration of the desulfurizing agent is increased to 52.1mg/L, the gas temperature is 50 ℃, and the concentration of the hydrogen sulfide in the natural gas is reduced to 10mg/m after the desulfurizing agent reacts with the hydrogen sulfide gas for 4min3(ii) a The gas temperature is 60 ℃, the desulfurization concentration is 50.8mg/L, and after the desulfurization agent reacts and contacts with the hydrogen sulfide gas for 2min, the concentration of the hydrogen sulfide in the natural gas is reduced to 10mg/m3(ii) a The gas temperature is 60 ℃, the desulfurization concentration is 52.3mg/L, and after the desulfurization agent reacts and contacts with the hydrogen sulfide gas for 1min, the hydrogen sulfide in the natural gas is reduced to 10mg/m3. In the field dosing process, the contact time of gas and medicament is very short, and because the limit of indoor experimental evaluation conditions can not realize on-line monitoring of the concentration of hydrogen sulfide, therefore, the proposal that when the field conditions allow, the optimal conditions are as follows: the temperature is 70 ℃, and the concentration of the desulfurization agent is 52.3 mg/L.
TABLE 3150 mg/m3Evaluation results of Hydrogen sulfide removal Rate
TABLE 4150 mg/m3Evaluation results of Hydrogen sulfide removal Rate
The content of hydrogen sulfide in natural gas is 150mg/m3The evaluation result of the hydrogen sulfide desulfurization agent shows that when the concentration of the agent is increased to 53.2mg/L, the gas temperature is 50 ℃, and the concentration of the hydrogen sulfide in the natural gas is reduced to 10mg/m after the desulfurization agent reacts with the hydrogen sulfide gas for 1min3(ii) a The gas temperature is 60 ℃, the concentration of the desulfurizing agent is 28.1mg/L, and after the desulfurizing agent reacts with the hydrogen sulfide gas for 1min, the concentration of the hydrogen sulfide in the natural gas is reduced to 10mg/m3(ii) a The gas temperature is 70 ℃, the concentration of the desulfurizing agent is 13.1mg/L, and after the desulfurizing agent reacts with the hydrogen sulfide gas for 1min, the hydrogen sulfide in the natural gas is reduced to 10mg/m3. In the field dosing process, the contact time of the gas and the reagent is very short, the on-line monitoring of the concentration of the hydrogen sulfide cannot be realized due to the limitation of indoor experimental evaluation conditions, and meanwhile, the efficiency of heating the gas is low in the experimental process, so that the proposal is that when the field conditions allow, the optimal conditions are that the temperature is 50 ℃ and the concentration of the desulfurizing agent is 52.3 mg/L.
TABLE 51500 mg/m3Evaluation results of Hydrogen sulfide desulfurization agent
TABLE 61500 mg/m3Evaluation results of Hydrogen sulfide desulfurization
The content of hydrogen sulfide in natural gas is 1500mg/m3The evaluation results of the hydrogen sulfide desulfurization agent showed that when the concentration of the desulfurization agent was increased to 500mg/L, the gas temperature was 50 ℃ and the desulfurization agent and hydrogen sulfide gas were mixedAfter 4min of reaction, the concentration was reduced to 10mg/m3The following; the gas temperature is 60 ℃, the concentration of the desulfurizing agent is 375mg/L, and after the sulfur desulfurizing agent reacts with the hydrogen sulfide gas for 4min, the concentration of the hydrogen sulfide in the natural gas is reduced to 10mg/m3The following; the gas temperature is 70 ℃, the concentration of the desulfurizing agent is 250mg/L, and after the desulfurizing agent reacts with the hydrogen sulfide gas for 4min, the hydrogen sulfide in the natural gas is reduced to 10mg/m every square meter3The following. In the field dosing process, the contact time of the gas and the reagent is very short, the concentration of hydrogen sulfide in natural gas cannot be monitored on line due to the limitation of indoor experimental evaluation conditions, and meanwhile, the efficiency of heating the gas is low in the experimental process, so that the proposal is made that when the field conditions allow, the optimal conditions are that the temperature is 60 ℃ and the concentration of the desulfurizing reagent is 375 mg/L.
Example 4 evaluation experiment for treatment of hydrogen sulfide in oil, gas and water
Selecting the hydrogen sulfide concentration of oil-gas-water as 50mg/m3、150mg/m3、1500mg/m3The temperatures were 50 ℃, 60 ℃ and 70 ℃, and the crude oil samples were the B1 sample and the A7 sample.
The specific operation steps are as follows:
(1) leakage testing: introducing a certain amount of nitrogen, building pressure, checking whether the process has air leakage, and if the process has air leakage, checking the circuit backwards to find out leakage points and prevent other leakage;
(2) blank experiment: directly passing through standard gas with a certain concentration, receiving the gas, and detecting the concentration of hydrogen sulfide;
(3) primary screening concentration: selecting hydrogen sulfide gas with corresponding concentration as a primary screening object, and weighing a certain mass of medicament; adjusting the hydrogen sulfide concentration screening instrument, setting the flow Q, setting the ventilation time T, introducing natural gas hydrogen sulfide, controlling the reaction temperature to be constant, and starting sampling. Sampling is carried out at each time point after the ventilation is finished, the concentration of the hydrogen sulfide is detected by gas chromatography, and the concentration of the hydrogen sulfide is recorded.
(4) And (3) removing gas, flushing nitrogen into the container, introducing the hydrogen sulfide gas into the sodium hydroxide solution without bubbles, and starting the next group of experiments after the reaction is finished.
The collected data are processed according to the formulas 1-4, and the evaluation results of the B1 oil-gas-water hydrogen sulfide desulfurization agent are shown in tables 7, 8 and 9.
TABLE 7B 1 oil gas water hydrogen sulfide concentration 50mg/m3Evaluation results of Hydrogen sulfide desulfurization
TABLE 8B 1 oil gas water hydrogen sulfide concentration 150mg/m3Evaluation results of Hydrogen sulfide desulfurization
TABLE 9B 1 oil gas water hydrogen sulfide concentration 1500mg/m3Evaluation results of Hydrogen sulfide desulfurization
The collected data are processed according to the formulas 1-4, and the evaluation results of the A7 oil-gas-water hydrogen sulfide desulfurization agent are shown in the table 10, the table 11 and the table 12.
TABLE 10A 7 concentration of hydrogen sulfide in hydrocarbon water 50mg/m3Evaluation results of Hydrogen sulfide desulfurization
TABLE 11A 7 concentration of hydrogen sulfide in hydrocarbon water 150mg/m3Evaluation results of Hydrogen sulfide desulfurization
TABLE 12A 7 concentration of hydrogen sulfide in hydrocarbon water 1500mg/m3Evaluation results of Hydrogen sulfide desulfurization
As can be seen from tables 7, 8 and 9:
b1 Hydrogen sulfide concentration in oil and gas Water is 50mg/m3The evaluation result of the desulfurization agent shows that when the concentration of the desulfurization agent is 100mg/L and the temperature is 50 ℃, the desulfurization agent reacts with the hydrogen sulfide in the oil water B1 for 20min, and the concentration of the hydrogen sulfide in the oil water is 10mg/m3The following; b1 the temperature of the oil gas water is 60 ℃, the concentration of the desulfurization agent is 100mg/L, and after the desulfurization agent is contacted with the hydrogen sulfide gas for 20min, the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following; b1 oil gas water temperature is 70 ℃, desulfurizer concentration is 200mg/L, and after the contact time of the desulfurizer and the hydrogen sulfide gas is 10min, the hydrogen sulfide concentration in the oil gas water is reduced to 10mg/m3The following. In the field dosing process, the contact time of oil-gas-water and the reagent is long, and according to the characteristics of chemical reaction and the consideration of cost, the optimal conditions are that the temperature is 50 ℃ and the concentration of the desulfurization reagent is 100 mg/L.
B1 Hydrogen sulfide concentration in oil and gas Water 150mg/m3The evaluation result of the desulfurization agent shows that when the concentration of the desulfurization agent is 100mg/L, the temperature of the oil gas water B1 is 50 ℃, and after the desulfurization agent reacts with the hydrogen sulfide gas for 20min, the concentration of the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following; the temperature of the B1 oil gas water is 60 ℃, the concentration of the desulfurization agent is 200mg/L, and after the desulfurization agent reacts with the hydrogen sulfide gas for 15min, the concentration of the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following; the temperature of the B1 oil gas water is 70 ℃, the concentration is 100mg/L, and after the desulfurization agent reacts with the hydrogen sulfide gas for 20min, the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following. In the field dosing process, the contact time of oil-gas-water and the reagent is long, and according to the characteristics of chemical reaction and the consideration of cost, the optimal conditions are that the temperature is 50 ℃ and the concentration of the desulfurization reagent is 100 mg/L.
B1 Hydrogen sulfide concentration in oil and gas Water 1500mg/m3The results of the evaluation of the reagent removal show that when the concentrations of the desulfurization reagent in the oil-gas-water are 100mg/L and 200mg/L, the temperature of the B1 oil-gas-water is 50 ℃, and the concentration of the hydrogen sulfide in the oil-gas-water can not be reduced to 10mg/m after the desulfurization reagent reacts with the hydrogen sulfide gas for 30min3The following; the temperature of the B1 oil gas water is 60 ℃, the concentration is 100mg/L, and the desulfurizing agent is reacted with the hydrogen sulfide gasAfter 30min, the hydrogen sulfide content is reduced to 10mg/m3The following; the temperature of the B1 oil gas water is 70 ℃, the concentration is 100mg/L, and after the desulfurization agent reacts with the hydrogen sulfide gas for 30min, the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following. In the actual on-site dosing process, the contact time of oil, gas and water and the medicament is long, and according to the characteristics of chemical reaction and the consideration of cost, the optimal conditions are that the temperature is 60 ℃ and the medicament concentration is 100 mg/L.
As can be seen from tables 10, 11 and 12:
a7 concentration of hydrogen sulfide in oil and gas water is 50mg/m3The evaluation result of the desulfurization agent shows that when the concentration of the desulfurization agent in the oil gas water is 100mg/L, the temperature of the A7 oil gas water is 50 ℃, and the concentration of the hydrogen sulfide in the oil gas water cannot be reduced to 10mg/m after the desulfurization agent reacts with the hydrogen sulfide gas for 20min3The following; the temperature of A7 oil gas water is 60 ℃, the concentration is 200mg/L, and after the desulfurizing agent reacts with the hydrogen sulfide gas for 20min, the concentration of the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following; the temperature of A7 oil gas water is 70 deg.C, the concentration is 100mg/L, and after the desulfurater reacts with hydrogen sulfide gas for 20min, the hydrogen sulfide is reduced to 10mg/m3The following. In the actual on-site dosing process, the contact time of oil, gas and water and the medicament is long, and according to the characteristics of chemical reaction and the consideration of cost, the optimal conditions are that the temperature is 70 ℃ and the medicament concentration is 100 mg/L.
A7 concentration of hydrogen sulfide in oil and gas water 150mg/m3The evaluation result of the desulfurization agent shows that when the concentration of the desulfurization agent in oil-gas-water is 200mg/L, the temperature of the A7 oil-gas-water is 50 ℃, the desulfurization agent reacts with hydrogen sulfide gas within 20min, and the concentration of the hydrogen sulfide in the oil-gas-water is reduced to 10mg/m3The following; the temperature of the oil gas water A7 is 60 ℃, the concentration of the desulfurizing agent is 100mg/L, and after the desulfurizing agent reacts with the hydrogen sulfide gas for 20min, the concentration of the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following; the temperature of the A7 oil gas water is 70 ℃, the concentration is 100mg/L, and after the desulfurizing agent reacts with the hydrogen sulfide gas for 20min, the concentration of the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following. In the actual on-site dosing process, the contact time of oil, gas and water and the medicament is long, and according to the characteristics of chemical reaction and the consideration of cost, the optimal conditions are that the temperature is 60 ℃ and the medicament concentration is 100 mg/L.
A7 oil and gasThe concentration of hydrogen sulfide in water is 1500mg/m3The evaluation result of the desulfurization agent shows that when the concentration of the desulfurization agent in the oil gas water is 200mg/L, the temperature of the A7 oil gas water is 50 ℃, the concentration of the hydrogen sulfide can not be reduced to 10mg/m within 20min after the desulfurization agent reacts with the hydrogen sulfide gas3The following; the temperature of A7 oil gas water is 60 ℃, the concentration of desulfurizer is 100mg/L and 200mg/L, and the concentration of hydrogen sulfide can not be reduced to 10mg/m after the hydrogen sulfide contacts with the medicament for 20min3The following; the temperature of the oil gas water A7 is 70 ℃, the concentration of the desulfurizing agent is 200mg/L, and after the desulfurizing agent reacts with the hydrogen sulfide gas for 20min, the concentration of the hydrogen sulfide in the oil gas water is reduced to 10mg/m3The following. In the actual on-site dosing process, the contact time of oil-gas-water and the reagent is long, and according to the characteristics of chemical reaction and the consideration of cost, the optimal conditions are that the temperature is 70 ℃ and the concentration of the desulfurization reagent is 100 mg/L.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (8)
1. A hydrogen sulfide treating agent evaluation device is characterized in that: the device comprises a hydrogen sulfide gas inlet device, a reaction device, a detection device, a tail gas absorption device and a purging device, wherein the hydrogen sulfide gas inlet device and the purging device are connected with a gas inlet pipe of the reaction device;
the tail gas treatment device comprises a buffer bottle, a first-stage absorption bottle and a second-stage absorption bottle which are connected in sequence, wherein the buffer bottle is a closed empty bottle, the first-stage absorption bottle is a closed bottle containing a hydrogen sulfide absorbent, and the second-stage absorption bottle is an open bottle or a bottle provided with a tail gas outlet and containing the hydrogen sulfide absorbent.
2. The hydrogen sulfide treating agent evaluation device according to claim 1, wherein: the hydrogen sulfide gas inlet device and the blowing device are connected with a gas inlet pipe of the reaction device through a gas inlet tee joint, and the detection device and the tail gas treatment device are connected with a gas outlet pipe of the reaction device through a gas outlet tee joint.
3. The hydrogen sulfide treating agent evaluation device according to claim 1, wherein: the reaction device comprises a reaction kettle and a temperature control device, wherein the temperature control device comprises a liquid interlayer wrapping the reaction kettle, a circulator and a circulating pipe, and the circulating pipe connects the liquid interlayer and the circulator to form a through annular flow path.
4. The hydrogen sulfide treating agent evaluation device according to claim 3, wherein: the inlet end of the circulating pipe connected with the liquid interlayer is arranged at the bottom of the liquid interlayer, and the outlet end of the circulating pipe connected with the liquid interlayer is arranged at the top of the liquid interlayer.
5. The hydrogen sulfide treating agent evaluation device according to claim 1, wherein: the hydrogen sulfide gas inlet device is a hydrogen sulfide gas cylinder, the purging device is an air gas cylinder, and the detection device is a gas chromatograph.
6. The hydrogen sulfide treating agent evaluation device according to claim 1, wherein: the reaction device is provided with a pressure gauge and a thermometer, and the air inlet pipe of the reaction device is provided with a flowmeter.
7. The hydrogen sulfide treating agent evaluation device according to claim 1, wherein: a hydrogen sulfide air inlet valve is arranged at the downstream of the hydrogen sulfide air inlet device, a purging valve is arranged at the downstream of the purging device, and the hydrogen sulfide air inlet valve and the purging valve are arranged at the upstream of the air inlet tee joint; the upstream of the detection device is provided with a detection valve, the upstream of the tail gas treatment device is provided with a first tail gas valve, and the detection valve and the first tail gas valve are arranged at the downstream of the gas outlet tee joint.
8. The hydrogen sulfide treating agent evaluation device according to claim 1, wherein: the evaluation device further comprises a control cabinet, wherein a control circuit and a control panel which are connected with each other are arranged in the control cabinet, and the control circuit is connected with a pressure gauge, a thermometer, a flow meter, an air inlet tee joint, an air outlet tee joint, a hydrogen sulfide air inlet valve, a purging valve, a detection valve, a first tail gas valve and a detection device.
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