47 results about "Injection point" patented technology

A proportioner comprising one or more proportioner inlets configured to receive a common concentrated proppant fluid comprising a proppant; two or more flow lines fluidly connected to the one or more proportioner inlets; two or more proportioner outlets, each of the two or more proportioner outlets associated with one of the two or more flow lines; one or more fluid inlets, each of the one or more fluid inlets configured to introduce a proppant-free fluid to the proportioner; and a metering system associated with at least one of the two or more flow lines, each at least one metering system upstream of the proportioner outlet of the flow line with which it is associated and each metering system fluidly connected with at least one of the one or more fluid inlets and configured for proportioning one of the proppant-free fluids into the associated flow line at an injection point.

The invention discloses a device for simulating flowing of a corrosion inhibitor in a pipeline and a corrosion inhibitor effect evaluation method, the device comprises a corrosion inhibitor filling cabin, a corrosion inhibitor experiment cabin and acquisition equipment, and is used for experimenting and acquiring data required by the evaluation method, and the evaluation method comprises the following steps: acquiring evaluation index data of a corrosion inhibitor to be tested; inputting the evaluation index data into a preset evaluation model, and obtaining a comprehensive evaluation score output by the preset evaluation model; and determining an evaluation grade corresponding to the comprehensive evaluation score in the target preset score interval, and outputting the comprehensive evaluation score and the evaluation grade of the corrosion inhibitor to be tested. The device adopts a modularly-designed pipe diameter-variable simulation pipeline assembly, and can realize multi-condition simulation such as adjustable injection points and various corrosion inhibitor injection modes. According to the effect evaluation method, a mode of combining an analytic hierarchy process and a fuzzy comprehensive evaluation method is adopted, multi-dimensional and complex data is converted into visual and practical evaluation, and quantitative evaluation of the corrosion inhibition effect is achieved.

The embodiment of the invention provides a corner tangential coal-fired boiler SCR denitration system and an ammonia injection grid partition control method thereof, and the method comprises the steps that an ammonia injection grid is divided into a plurality of independently-controlled large areas based on the combustion characteristics and flue gas flow characteristics of a coal-fired boiler, and each large area is internally provided with a plurality of ammonia injection grid injection points; a manual valve and an automatic adjusting valve are arranged in each large area, the ammonia spraying amount of a spraying point of a single ammonia spraying grid is adjusted through the manual valve, and the total ammonia spraying amount of the whole large area is dynamically adjusted through the automatic adjusting valve; and the NOx concentration and the ammonia escape concentration corresponding to each large area are monitored in real time, and the ammonia spraying amount of each large area is dynamically optimized through a control algorithm based on the boiler operation load change, so that the ammonia spraying distribution of each large area is matched with the NOx concentration distribution.

The invention discloses a process for energy conservation and consumption reduction in cement industry, and relates to the technical field of hazardous waste co-processing and flue gas denitration environmental protection, and the process comprises the following steps: step 1, selecting liquid hazardous waste with a heat value within a certain range, and fully atomizing the liquid hazardous waste through compressed air and a special spray gun; step 2, at a calorific value liquid hazardous waste adding point in a denitrification furnace system, spraying the atomized liquid hazardous waste into the denitrification furnace at a high speed; 3, according to the temperature working condition and the NOX concentration in the denitrification furnace system, the pulverized coal injection amount of a coal injection point of the denitrification furnace is reduced, and the ammonia water use amount of the SNCR denitrification system is adjusted; 4, monitoring the concentration, temperature and pressure parameters of gas components such as NOX and CO in the flue gas in real time through a plurality of detection points, and remarkably reducing coal consumption by replacing pulverized coal with liquid dangerous waste heat values; reducing gases such as CO and H2 are supplemented through hazardous waste combustion, so that the self-denitration effect of the denitrification furnace is enhanced, and the consumption of ammonia water is reduced.

The invention provides a chromium-polluted aquifer in-situ layered injection remediation method based on a response curved surface. The method comprises the following steps that a prediction model is constructed based on a response curved surface method, optimal agent parameters are predicted, pilot test verification is conducted based on the predicted optimal agent parameters, and the optimal pilot test agent injection amount is determined; establishing a relational expression between the agent injection concentration and the initial concentration of the underground water Cr (VI) based on the theoretical agent dosage, the adsorption capacity of the water-containing medium to the agent and the model prediction result; the optimal pilot plant test agent injection amount is the total injection amount of all the injection points, and according to the relational expression, the agent injection concentration of all the injection points in the chromium pollution site is determined. The method disclosed by the invention can be used for accurately regulating and controlling medicament parameters in actual engineering application, improving the remediation efficiency, shortening the construction period and saving the capital cost, fully remedying the chromium-polluted aquifer and reducing the risk of'yellowing 'of underground water in the later period, and is suitable for in-situ remediation construction application of the large-scale polluted aquifer.

This invention provides a micro-acidification downhole formation testing device and a micro-acidification method based thereon. The device includes a hydraulic power module, a compartmentalized acid-carrying unit, an acid injection / discharge pump unit, a probe module, a downhole observation chamber for acid-formation reaction, a pipeline system, and a control circuit. The hydraulic module is configured to drive tool movements and control the testing process via hydraulic power. The acid injection / discharge unit is configured to control fluid flow, circulation, and pressure regulation. The injection probe of the probe module is seated at the target acidification or acid fracturing test injection point, connecting the device to the formation. The downhole observation chamber for acid-formation reaction is configured to monitor the physical / chemical parameters during injection / discharge. This invention effectively solves the problems of acid system and acid formulation screening, optimization, and process optimization in real-world acid environments within formations.

Provided is a proportioner having one or more proportioner inlets to receive a common concentrated proppant fluid comprising a proppant, two or more flow lines fluidly connected to the one or more proportioner inlets, two or more proportioner outlets, each of the two or more proportioner outlets associated with one of the two or more flow lines, one or more fluid inlets, each of the one or more fluid inlets for introducing a proppant-free fluid to the proportioner, and a metering system associated with at least one of the two or more flow lines. Each metering system is positioned upstream of the proportioner outlet of the flow line with which it is associated and is fluidly connected with at least one of the one or more fluid inlets for proportioning one of the proppant-free fluids into the associated flow line at an injection point.

The utility model relates to the technical field of uniform distribution of tracers, in particular to a tracer mixing and uniform distribution device. The tracer agent mixing and uniform distribution device comprises an equidistant spiral distribution pipe, threaded agent discharging holes are formed in the equidistant spiral distribution pipe, a flow dividing barrel is mounted on each threaded agent discharging hole, and liquid distribution holes are formed in the barrel wall of each flow dividing barrel; and a flexible belt is distributed on the outer cylinder wall of the shunting cylinder. According to the tracer agent mixing and uniform distribution device, the tracer agent is uniformly distributed into the oil well filling pipe in a multi-point injection mode through the liquid distribution holes which are annularly distributed, the injection points can cover the whole section of the filling pipe, the concentration of the tracer agent can be uniformly distributed, the problem of concentration difference of traditional single-point injection is solved, and the tracer agent mixing and uniform distribution device is simple in structure and convenient to operate. The reliability of monitoring data is greatly improved, the dynamic movement of the flexible belt can disturb the mixing area of the tracer agent and the water liquid, the layered flow state is broken, the diffusion range of the tracer agent is further expanded, and the mixing process is completed in a short distance.

According to the deslagging and drainage device and system for the coal seam downward inclined drill hole, high-pressure gas jet flow and powerful mechanical spiral disturbance are cooperated, the deposition state of drilling cuttings and accumulated water at the bottom of the hole is broken, effective bottom cleaning is achieved, formation of a slag water cushion is avoided, and the risk of drill jamming is remarkably reduced; an optimized gas-liquid injection point (gas is in the middle and the lower part, and liquid is in the upper part) is combined with a spiral flow guide structure of the drilling tool, so that uniform and stable low-density gas-liquid-solid three-phase rotational flow is created. The flow state greatly reduces energy needed for overcoming gravity, and efficient and low-energy-consumption improvement of obliquely downward drilling is achieved. The intelligent gas-liquid collaborative deslagging and drainage system for the obliquely downward long drill hole of the coal seam is simple in structure, reasonable in overall structure, high in deslagging and drainage efficiency and high in adaptability. The system can effectively overcome the influence of gravity, prevent slag water at the bottom of the hole from being accumulated, keep the annulus unblocked, and remarkably improve the construction efficiency and safety of the obliquely downward long drill hole.

This invention belongs to the field of spatial location technology for geological defects, and provides a method and system for spatially locating water-conducting fracture zones in coal mines. The method involves establishing a three-dimensional prior geological model of the target area in the coal mine; setting at least one tracer injection point and multiple receiving points in the target area; injecting fluorescent nano-tracers; acquiring tracer concentration-time response data at each receiving point and extracting characteristic parameters; constructing a three-dimensional forward model based on the three-dimensional prior geological model and the extracted characteristic parameters, which includes a groundwater flow model and a tracer transport model; comparing the measured response with the forward model output, constructing a joint objective function, iteratively inverting the parameters to be estimated, obtaining the optimal parameter combination, and obtaining the three-dimensional spatial location, development height, extension direction, connectivity direction, influence range, and uncertainty results of the water-conducting fracture zone. This invention achieves water inrush source identification, water-conducting fracture zone location, and risk quantification assessment.

Disclosed are systems and methods for processing liquefied natural gas (LNG). The method includes directing cooled natural gas to a first column, directing natural gas liquids from the first column into a second column, generating, by the second column, a reflux stream, and directing the reflux stream to a point upstream of the second column, wherein an introduction of the reflux stream enhances a removal of heavy hydrocarbons from a gas in the LNG facility. The method further includes directing an output of the second column to a third column, generating, by the third column, a solvent stream, and directing the solvent stream into an injection point, wherein the introduction of the solvent stream lowers a freezing point of a feed gas in the LNG facility.

Non-electric, automatic fire extinguishing system without pressure storage, characterized in that: it comprises a gas source for temperature sensing (1), a pneumatic pipeline (2), a pneumatic starter (3), a gas generator (4), a reservoir for fire extinguishing agent (5) and a pipeline for spraying (6); the gas source for temperature detection (1), the pneumatic pipeline (2), the pneumatic starter (3) and the gas generator (4) are connected in sequence; the storage container for fire extinguishing agent (5) comprises a first outlet and a second outlet; the gas generator (4) is connected to the first outlet of the storage container for fire extinguishing agent (5) and the pipeline for spraying (6) is connected to the second outlet of the storage container for fire extinguishing agent (5); the gas source for temperature detection (1) is set up to detect the ambient temperature and to generate gas; the pneumatic pipeline (2) is designed to convey the gas generated by the gas source for temperature detection (1) to the pneumatic starter (3) and to trigger the operation of the pneumatic starter (3) by the conveyed gas pressure; the pneumatic starter (3) is designed to ignite the gas generator (4) during operation; the gas generator (4) is designed to generate gas to drive the injection of an extinguishing agent into the storage container for fire extinguishing agent via the pipeline to the injection (6).

This invention discloses a device and method for separating and controlling gas injection points. It mainly consists of a winch system, a sealing system, a power system, and a control system. The gasifying agent is fed into the gasification working face through a continuous tube with a certain degree of flexibility and strength. The first end of the continuous tube is placed inside the gasifier and connected to a nozzle or flamethrower. The second end of the continuous tube passes through the sealing system, exits from the working hole of the gasifier, and connects to the winch system. The second end of the continuous tube is connected to the gasifying agent delivery pipeline. The continuous tube is wound around the winch system. When the gas injection point needs to be retracted, the winch power mechanism drives the continuous tube to move, thereby causing the gas injection point to retract continuously or periodically. During the movement, the sealing system ensures that the outer wall of the continuous tube remains sealed to the wall of the working hole of the gasifier, preventing gas leakage from inside the gasifier.

This specification relates to the field of oil reservoir development technology, and specifically discloses a multi-branch radial well wave injection displacement method and device, wherein the method includes: obtaining reservoir physical property data, injection-production well network data, and production dynamic characteristic data of the target oil reservoir; determining multi-branch radial well network structure data for performing multi-branch radial well transformation on the injection wells in the injection-production well network based on the reservoir physical property data, injection-production well network data, and production dynamic characteristic data of the target oil reservoir; using the production dynamic characteristic data to determine the wave injection parameters for injecting into the transformed multi-branch radial well network; and generating an injection displacement scheme for the target oil reservoir based on the multi-branch radial well network structure data and the wave injection parameters. The above scheme can expand the range of the injected fluid. The multi-branch radial well provides multiple injection points, which can enhance the intensity and range of elastic waves during wave injection, improve the utilization of the remaining oil in the reservoir, and improve the recovery rate.

The invention relates to the technical field of geological exploration, and provides a sedimentary basin strike-slip fracture related oil and gas filling point judgment method, which comprises the following steps: collecting geological information of a target area, obtaining strike-slip fracture segment characteristics, fault properties and strike-slip fracture grids of a hydrocarbon source rock overlying compact layer (such as a gypsum-salt layer) in the target area by adopting qualitative analysis, and determining the strike-slip fracture segment characteristics and fault properties of the target area according to the strike-slip fracture segment characteristics, the fault properties and the strike-slip fracture grids. Determining a rough range of a charging point; calculating the key layer thickness of the hydrocarbon source rock stratum and the compact layer and the conduction coefficient of the top of the compact layer, carrying out normalization processing, and carrying out filling point correction according to quantitative data obtained through calculation and in combination with strike-slip fracture segmentation characteristics; and verifying the corrected charging point according to the fluctuation point of the segmented change of the oil-gas migration index and the crude oil physical property parameter index. According to the method provided by the invention, the accuracy and reliability of the method for judging the strike-slip fracture related oil and gas filling points can be remarkably improved, guiding significance is provided for oil and gas exploration, and exploration benefits are greatly improved.

The invention discloses a CO2 sequestration and gas production collaborative device adaptive to a tight gas horizontal well, and relates to the technical field of gas production and carbon sequestration collaboration.The device comprises a reservoir state sensing module, an intelligent analysis regulation and control module, a CO2 injection regulation and control module, a pressure balance module and a gas production execution module; multi-dimensional data of reservoir stress, concentration and pressure are synchronously collected through the reservoir state sensing module, a multi-field coupling model of the intelligent analysis regulation and control module is combined, the problems that an existing device conducts regulation and control through a single parameter, and stress sensitivity of the tight gas reservoir is not considered are solved, an injection point is accurately adjusted through the CO2 injection regulation and control module, and the reliability of the device is improved. The pressure balance module and the gas production execution module cooperatively adjust the reservoir pressure, the problem of reservoir pressure unbalance is solved, finally, the gas production efficiency of the tight gas horizontal well and the CO2 storage safety are synchronously improved, and it is guaranteed that the cooperative target of energy development and carbon emission reduction is stably achieved.

The application discloses a system for evaluating gas injection pressure water coning effect of bottom water sandstone reservoirs, which comprises a core device, a displacement device and a measuring device. The core device is internally arranged with an experimental core and is provided with multiple injection points along the axial direction of the experimental core. A pressure measuring point and a probe measuring point are arranged on the core section of each injection point. The displacement device is connected with the core device, used for injecting water to the experimental core saturated with formation water and displaced with crude oil to simulate a strong bottom water drive process, and injecting gas to any injection point at different speeds and / or different amounts to simulate a gas injection pressure water coning process. The measuring device is connected with the core device, used for measuring pressure changes of different pressure measuring points and ultrasonic signal changes of different probe measuring points in the strong bottom water drive simulation process and the gas injection pressure water coning simulation process respectively. The gas swept range is determined by comparing the same position and same type of measurement data. The application solves the problem of simulating the gas injection pressure water coning process of the bottom water sandstone reservoirs.

The invention relates to a method and a device for depositing a layer on a substrate in a process chamber of a CVD reactor, comprising a gas inlet device for feeding various process gases into the process chamber, wherein a process gas containing at least a first and a second gas is fed into at least one gas distribution volume, wherein the gas distribution volume is connected by flow to gas outlet openings arranged in a gas outlet surface, through which the process gas flows into the process chamber, wherein the process gas is fed into the gas distribution volume at at least two different injection points with a different mixing ratio of the first gas to the second gas, such that the gas flows exiting the gas outlet openings exhibit differing concentrations of the first and second gases in the radial direction with respect to a center of the gas outlet surface.where the first and second gases have different thermal conductivity properties. By varying the mixing ratio of the first and second gases at the various injection points, predetermined radial surface temperature profiles are set for elements arranged in a heat transfer zone between a heating element and a cooling element.

A shut-off valve for controlling the flow of molten material exiting the injection point of an injector into a cavity of a mold is described. The valve comprises a passage for molten material extending along a first axis to the injection point, a sliding element having a first free end and movably mounted to move along a second axis to approach the first axis so that the first free end can move and reach a point within the passage to throttle the flow, and an actuating element for moving the sliding element along the second axis. The actuating element comprises a material section that has a deformable volume due to a piezoelectric effect and can be electrically stimulated to increase and / or decrease its dimensions.

Liquid-liquid extraction process and column (1) using / comprising feed injection points (2), washing (3) and optionally backwashing (4), two withdrawal points (5, 6), and trays (Pi) defining n zones comprising: at least one extraction zone Zi comprising zones from Z1 to Zx, x ≥ 1, and optionally at least one backwashing zone comprising zones from Zx+1 to Zn, n ≥ x; in which the trays of the same zone have weirs (11) in which are arranged differential pressure elements (13), and when x > 1, the ratio between the pressure loss coefficient of the differential pressure element of a zone Zi and that of a zone Zi+1 is between 0.8 and 8; and optionally when x = 1, the pressure loss coefficient of at least one backwashing zone is greater than that of zone Z1. Figure 4 to be published

The utility model relates to the field of junction boxes, in particular to a junction box assembly structure, which comprises a box body and a box cover, the box cover is mounted at the upper end of the box body in a sliding clearance fit manner, an anti-reverse mounting block is arranged at the outer side end part of the box cover along the sliding direction, and a wingspan part is arranged at the right end of the bottom of the box body. Glue inlet points for box body injection molding are arranged on the wingspan parts, the box body and the box cover are installed in a sliding clearance fit mode, the box cover can slide at the upper end of the box body in the specific direction, the box cover can better adapt to deformation caused by heating of the box cover, the falling risk of the box cover is reduced, the glue inlet points are independently added to the tail of the box body, the fragile glue inlet points of the box body are moved to the outside of the box body, and the glue inlet points are not prone to falling off. The influence on the main structural strength of the box body can be reduced, box body cracking caused by weak glue inlet position is prevented, the overall performance is improved, and the service life of the box body is prolonged.

A shut-off valve for controlling the flow of molten material exiting a injection point into a cavity of a mold is described. • a passage for the molten material extending along a first axis, • a valve that is movably mounted so that a free end of the valve can move to and reach a point inside the passage in order to throttle the passage and thereby control the flow and • a rotatable element near the injection point, includes, wherein part of the slide is connected to the rotatable element, such that a rotation of the rotatable element leads to a displacement of the slide from and / or to the said point.

A method for removing residue deposits from a reaction chamber includes the step of supplying a cleaning gas into the reaction chamber via direct delivery from a remote plasma source (RPS). The cleaning gas forms a plurality of gas flow streamlines within the reaction chamber. Each streamline starts at an injection point for receiving the cleaning gas and ends at a chamber pump port coupled to a fore line for exhausting the cleaning gas. The flow characteristics of the cleaning gas are modified to redirect at least some of the gas flow streamlines to circulate near the inner perimeter of the reaction chamber to remove residue deposits or to enhance the diffusion of cleaning species to surfaces to be cleaned. The inner perimeter is positioned along one or more vertical surfaces of the reaction chamber orthogonal to a horizontal surface containing the injection point.

The invention discloses a device and a method for testing the CO2 injection recovery rate of an edge-bottom water gas reservoir. The device comprises a core holder, a first container, a second container, a third container, a fourth container, a first pressure sensor and data processing equipment, wherein the first container and the second container are respectively connected with the input end of the core holder; the third container is connected with a plurality of CO2 injection points arranged on the core holder; the fourth container is connected with the output end of the core holder; the number and the positions of CO2 injection points arranged on the core holder are set according to experiment requirements; the first container and the second container are respectively used for containing different substances for simulating the edge-bottom water gas reservoir so as to simulate the edge-bottom water gas reservoir; the third container is used for containing CO2 gas so as to inject CO2 into the simulated edge-bottom water gas reservoir to develop the gas reservoir; the fourth container is used for collecting products of CO2 injection gas reservoir development of the simulated edge-bottom water gas reservoir and removing CO2 gas in the products; and the first pressure sensor is used for collecting the pressure of the gas in the fourth container and transmitting the pressure to the data processing equipment so as to calculate the recovery rate of CO2 injection development of the edge-bottom water gas reservoir.

The present application relates to the technical field of combustor, and provides a hydrogen fuel combustor with staggered arrangement of multiple radial injection points, an inner cavity of a flame tube forms a combustion chamber, a ventilation device is arranged at one end of the flame tube, the ventilation device comprises a gas supply cavity, a gas supply pipe and a gas mixing cavity, the gas supply cavity is connected with the flame tube in an axial direction, the gas mixing cavity is arranged between the gas supply cavity and the flame tube, and the gas mixing cavity is communicated with the gas supply pipe, a plurality of micro-mixing injection pipes are staggered arranged in the gas mixing cavity, the micro-mixing injection pipes are arranged in an axial direction, a plurality of air inlet holes are uniformly distributed on the outer side of the micro-mixing injection pipes in a circumferential direction, the air inlet holes are communicated with the inside of the micro-mixing injection pipes, the air inlet holes of adjacent micro-mixing injection pipes are staggered arranged, a first end of the micro-mixing injection pipe is communicated with the combustion chamber, and a second end of the micro-mixing injection pipe is communicated with the inner cavity of the gas supply cavity; the present application realizes micro-mixing combustion of hydrogen, can effectively avoid the overlapping phenomenon of high-temperature zones between flames, makes the combustion stable, and reduces the emission of NOx in the combustion process.

The present application belongs to the technical field of underground coal gasification, and discloses a method and system for preparing rich-methane coal gas by deep underground coal gasification. After the underground coal gasification enters a normal gasification stage, under the conditions of relatively low temperature and high pressure, waste water containing catalyst is injected into the underground gasification furnace, and by adjusting the gas-water ratio and / or the position of the gas injection point, the volume percentage of methane in the coal gas is kept above 35%. The system for realizing the above method comprises an underground gasification furnace, a double-layer continuous pipe and its injection device, a variable-frequency water injection pump and a UCG control unit; the continuous pipe gas inlet is connected with a gasifying agent storage device, and the continuous pipe water inlet is connected with the variable-frequency water injection pump; the underground gasification furnace is connected with the UCG control unit; and the variable-frequency water injection pump is connected with a catalytic waste water pool. The present application forms a stable and necessary process control method and operation system for maintaining the production of rich-methane coal gas in the gasification coal seam, and the prepared coal gas has high methane content.

The utility model discloses a power distribution cabinet of remote monitoring can, including the cabinet, the front side of cabinet is equipped with the apron, the inside of cabinet is installed with a plurality of mounting brackets from top to bottom in proper order, the front side both ends of mounting bracket all are installed with the element. This power distribution cabinet of remote monitoring can, through the cooperation between cabinet, apron, mounting bracket, element, wiring box, subassembly box and monitoring unit, when the inside installation multiple elements of cabinet use in the way, sensor carries out fire signal detection, sends out the instruction and makes first motor and second motor run, first screw rod and second screw rod rotate, make the front side shower nozzle of cavity block move to the front of the element that breaks out, then solenoid valve energization opens and closes, make the dry powder in fire extinguisher spouts through the shower nozzle, realize only to the fire extinguishing operation of the element that breaks out, make dry powder injection point position precision, need not completely cover the dry powder inside cabinet, to play the role of reducing the subsequent cleaning maintenance operation difficulty.

The invention relates to a multi alternative solids fuel material line injector for introducing material from an unpressurized source to a lean phase pneumatic transport line (1), the injector comprising a rotary airlock valve (2) and a pressure differential regulation system, configured to create and adjust a chosen pressure differential ΔP between an upper part pressure Pa and a lower part pressure Pb of the connecting shaft (5) to set a suction force between the material accumulated in at least one airlock pocket (22) and an injection point (13) when said airlock pocket (22) is aligned with at least part of the injection point (13).

The application relates to the technical field of polymer production, and is a gas-phase reactor terminator multi-point injection device and method.The former comprises a gas-phase reactor and a terminator storage bottle;the gas-phase reactor is fixedly connected with a raw material pipeline at a top feeding end;the gas-phase reactor is fixedly connected with a reflux pipeline between the top and the bottom;the terminator storage bottle is fixedly connected with a terminator main pipe at a discharging end;the first discharging end of the terminator main pipe is fixedly connected with a bottom injection pipeline between the bottom feeding end of the gas-phase reactor; and the second discharging end of the terminator main pipe is fixedly connected with an upper injection pipeline between the upper feeding end of the gas-phase reactor.The application realizes rapid, uniform and accurate injection of the terminator by arranging injection points in multiple key areas, significantly improves termination efficiency and reliability, reduces the amount of the terminator, effectively reduces equipment damage and the rate of defective products, and guarantees long-period safe and stable operation of the device.