271 results about "Gas uptake" patented technology

The invention discloses an intelligent multi-gas detection module data processing system and method based on NDIR, and relates to the technical field of gas detection.The method comprises the steps that a multi-wavelength NDIR sensor is used for obtaining light intensity changes of a gas sample under different wavelengths, and original spectral signals are generated; performing denoising processing on the spectral signal by adopting wavelet transform, and performing zero calibration and dynamic baseline deduction; based on the Beer-Lambert law in combination with environmental factors, establishing a relation model between gas absorption and spectral signals; updating model parameters by using a recursive least square algorithm, and continuously optimizing gas concentration prediction; separating gas signals by adopting a non-negative matrix factorization algorithm, and predicting the concentration of each gas; and the edge end operates the lightweight model in real time, and regularly uploads the model to the cloud end for global optimization and federated learning. The method can effectively improve the condition that the precision is insufficient when the model is used for a long time in the prior art.

The invention relates to a method and a system for detecting the concentration of trace methane by locking the position of an absorption peak, and belongs to the technical field of laser gas detection. Modulated laser output by a laser is divided into two paths, one path enters a reference light path, the other path firstly passes through a gas absorption cell and then enters an actual detection light path, and methane gas with known concentration is sealed in the reference light path; demodulating a modulation signal output by the actual detection light path, and calculating to obtain a trace methane gas concentration value; and demodulating the modulation signal output by the reference light path to obtain a second harmonic signal, comparing the amplitude of the second harmonic signal with the amplitude of a harmonic signal corresponding to a preset methane absorption peak to generate a wavelength shift error signal, and adjusting the driving parameter of the laser through a feedback mechanism to generate a wavelength shift error signal. The output power and wavelength drift of the laser are monitored in real time, and it is ensured that the laser wavelength is always locked within the methane absorption peak range. According to the invention, high-precision and high-stability trace methane concentration detection can be realized.

The invention relates to a gas discharge detection method, system and equipment based on an ultraviolet spectrum and a medium. The method comprises the following steps: transmitting a frequency-modulated ultraviolet light beam to a gas chamber to be detected, synchronously collecting and processing a transmission light signal in a branching manner, and simultaneously obtaining a modulated spectrum signal for gas absorption analysis and a discrete photon pulse signal for detecting a discharge event; respectively processing the two paths of signals, and extracting sulfur dioxide concentration information and photon radiation characteristics; fusing the two types of features to construct a dynamic feature vector, and obtaining a discharge state grade by using a dynamic Bayesian network diagnosis model; and finally, combining the concentration and state information, and outputting the membership degree of the discharge duration through fuzzy logic. By adopting the method, the fast process and the slow process of partial discharge can be cooperatively monitored, and the early detection sensitivity and the diagnosis reliability are improved.

The present invention proposes a separator of spray washing and swirl centrifugation composite and a separation method thereof, which belongs to the technical field of dust removal and gas absorption devices. In this method, washing liquid is sprayed through a washing liquid nozzle at the inlet of the contraction section of the venturi tube, so that the washing liquid is effectively dispersed into droplets, thereby improving the dust removal efficiency and gas absorption efficiency. The swirler in the straight cylinder at the rear of the expansion section of the venturi tube promotes the formation of a swirl in the gas. Under the action of centrifugation, the droplets and dust are thrown to the wall of the straight cylinder and eventually fall into the dirty liquid cavity, which can achieve effective removal of dust and droplets in the airflow. The swirler of the present invention includes two types: radial swirler and axial swirler, which can be applied to two working conditions of low air flow and high air flow, respectively. The present invention has a simple structure, compact design, and is easy to use. It can be widely used in the fields of dust removal, desulfurization, decarbonization, etc.

The invention provides a hollow-core optical fiber internal gas pressure regulating device and method. The device comprises two high-pressure gas chambers, and an optical fiber interface of a second high-pressure gas chamber and a row of optical fiber interfaces of a first high-pressure gas chamber are used for being communicated with the two ends of a hollow-core optical fiber respectively; the gas path is respectively connected with gas inlets and outlets of the two high-pressure gas chambers; the vacuum pump is connected with the gas inlet-outlet through a gas path; the high-pressure gas source is connected with the gas inlet and outlet through a gas path; the number of the optical detection assemblies is the same as that of the hollow-core optical fibers, each optical detection assembly is connected with a tail fiber, and each tail fiber is connected with the other row of optical fiber interfaces of the first high-pressure air chamber and is aligned and coupled with the corresponding hollow-core optical fiber in the first high-pressure air chamber. A set of gas path equipment is adopted, residual gas is extracted from the two ends of the hollow-core optical fiber, high-pressure gas is filled, the internal pressure of the optical fiber can be rapidly improved, the problem of additional attenuation caused by gas absorption is solved, and the long-term use stability of the optical fiber is enhanced.

The invention discloses a gas concentration measuring method and device. The gas concentration measuring method comprises the steps that a control module controls a driving module to output scanning driving signals of at least two scanning periods to a laser; the laser emits an optical signal according to the scanning driving signal; the photoelectric detector receives the attenuated light signal absorbed by the gas to be detected and converts the attenuated light signal into an electric signal; the control module determines the concentration of the to-be-detected gas in the first scanning period according to the electric signal of the first scanning period; when the concentration of the to-be-detected gas in the first scanning period is smaller than a first set threshold value, the concentration of the to-be-detected gas in the second scanning period is determined according to the electric signal in the second scanning period on the basis of the wavelength modulation spectrum WMS technology, and when the concentration of the to-be-detected gas in the first scanning period is larger than or equal to the first set threshold value, the to-be-detected gas is detected. And determining the concentration of the to-be-detected gas in the second scanning period based on a direct absorption spectrum (DAS) technology according to the electric signal in the second scanning period. According to the invention, the problem that high sensitivity and full scale are difficult to consider in the existing gas detection technology can be solved.

The utility model relates to a solid hydrogen storage tank system, and belongs to the technical field of using gas absorbents. The system comprises a hydrogen storage tank, a water storage tank, a first pump, a second pump and a heater, a seal head is arranged at the top of the tube pass of the hydrogen storage tank and is welded with a gas inlet and outlet forged tube which is connected with a pressure gauge and a temperature transmitter; a tube plate is fixed at the top of the hydrogen storage tank shell pass, the tube plate is connected with a tube pass barrel flange, a heat exchange tube is arranged in the hydrogen storage tank, a hydrogen storage material compressed into a cake shape is filled in the heat exchange tube, and an expansion connection tube plate is additionally attached to the upper end of the heat exchange tube through strength welding; the shell side wall of the hydrogen storage tank is provided with a water outlet and a water inlet, the water outlet is connected with a first pump, the first pump is connected with a water storage pond, the water storage pond is further connected with a second pump, the second pump is connected with the water inlet, and a heater is arranged between the water inlet and the second pump. When the solid hydrogen storage tank absorbs hydrogen, water circulates to take away heat, and when hydrogen is released, water is heated to enter the tank to provide heat, so that the reaction rate during hydrogen absorption and release is effectively improved, and the working efficiency of hydrogen absorption and release of the hydrogen storage tank is further improved.

The invention discloses a multi-gas data monitoring and intelligent management system and method based on NDIR, and relates to the technical field of gas data management, and the system comprises a gas data acquisition module, a gas data optimization module, a gas feature extraction module, a gas feature evaluation module, a gas database construction module and a gas monitoring alarm module. The method comprises the steps of collecting gas absorption intensity data and environmental data, optimizing the gas absorption intensity data, performing data preprocessing on gas, extracting gas characteristics from the processed data in combination with the environmental data, calculating influence coefficients of the characteristics on gas concentration, setting threshold screening characteristics, and changing the gas concentration in a monitoring environment. The method comprises the following steps: acquiring multiple groups of feature and concentration data, establishing a database, monitoring the difference degree between environment features and database features in real time, and judging and alarming according to the difference degree. According to the method, key features are screened according to a fixed and dynamic threshold value, accurate data support is provided, environmental gas safety is guaranteed, and potential risks are reduced.

Calibration methods for lidar equipment are disclosed. In some embodiments, the lidar equipment is provided with an internal gas reference cell with a known concentration of the gas of interest, such as methane (CH4), which provides known absorptions at wavelengths particular to the gas. The lidar system laser beam passes through the gas reference cell before scanning a scene, and provides a known level of gas absorption at those known absorption wavelengths. This guarantees there is a minimum signal to be detected by the lidar system. In some embodiments, the lidar equipment is provided with an external calibration unit having one or more gas sample cells with predetermined lengths and known concentrations of the gas of interest. By making lidar measurements using an arrangement of these calibrated cells, adjustments to the parameters used in the algorithms relating detected photon counts with gas concentration may be made.

The utility model provides a chemical gas adsorption cleaning device. Comprising a base, an adsorption assembly is arranged on the top of the base, an adjusting assembly is arranged on the inner side of the adsorption assembly, and a discharging assembly is arranged on the top of the base and located on the right side of the adsorption assembly. According to the chemical gas adsorption cleaning device provided by the utility model, all parts of the device are matched with one another, chemical gas is guided into the inner side of the adsorption box on the left side through the gas inlet pipe, and impurities in the chemical gas are adsorbed through the plurality of adsorption nets; the chemical gas absorption device solves the problem that an existing chemical gas absorption device cannot clean impurities in the device and influences the environment after discharging, facilitates replacement of an adsorption net by a worker, guarantees the service life and the adsorption effect of the device, and cooperates with the effect of an adjusting assembly, so that the device is convenient to use. And therefore, a worker can conveniently adjust the flow amount between the two adsorption boxes according to requirements.

The invention provides a gas pressure control device for a direct absorption spectrum, which belongs to the technical field of direct absorption spectrums.The device comprises an absorption cell, and the gas inlet end and the gas outlet end of the absorption cell are respectively provided with a pressure sensor and an MFC which are connected with a control monitoring unit; the pressure sensors and the MFCs at the air inlet end and the air outlet end monitor the pressure intensity and the flow of the air inlet end and the air outlet end in real time and transmit the pressure intensity and the flow to the control monitoring unit, the control monitoring unit comprises an outer ring PID controller and an inner ring PID controller, and the pressure intensity of the air inlet end, the pressure intensity of the air outlet end and the set target pressure intensity are input into the outer ring PID controller to obtain outer ring output values; the outer ring output value is input into an inner ring PID controller to obtain an inner ring output value, the gas inlet end MFC adjusts the flow of the gas inlet end according to the inner ring output value, and the gas outlet end MFC adjusts the flow of the gas outlet end according to the inner ring output value. And double-closed-loop PID control regulation is adopted, so that the accuracy and stability of pressure control in the gas absorption cell are improved.

The utility model relates to the technical field of mine hole sealing, in particular to a deep hole blasting poisonous and harmful gas absorption and hole sealing cooperation device which comprises a first container, a built-in sleeve, a connecting cover, a second container, anti-skid claws, bags, a PC grouting pipe and a steel grouting pipe. The bag is stabilized by the binding tube and the buckle and does not displace; the PC grouting pipe penetrates through the interior of the second container and is fixed to the buckle on the connecting cover, and the buckle of the connecting cover is fixed into the groove of the first container. The assembled device is placed in a rock drill hole, the device is fixed in the drill hole through the anti-skid hook claws, grouting is conducted on the two bags through the PC grouting pipe, and when the pressure rises to 0.8 MPa, the explosion valve in the bag close to one side of the hook claws is opened. When the pressure is increased to 1.2 MPa, the explosion valve in the bag close to one side of the grouting opening is opened and is fastened on the inner wall of the rock drill hole after expansion, so that an inner section hole sealing space is formed in a sealing manner, continuous grouting is performed, when the pressure is increased to 1.6 MPa, grouting on the PC grouting pipe is stopped, the grouting pipe is blocked, then grouting on the steel grouting pipe is performed, and the pressure is increased to 1.2 MPa; and grouting is stopped until the inner section hole sealing space is filled with the grout, and the drilled hole is sealed. After the mining water-gel explosive is blasted, the reactant in the first container reacts with carbon monoxide at high temperature to be converted into carbon dioxide, and after blasting is completed, if other toxic and harmful gas exists, the reactant further reacts with the carbon dioxide through the second container.

The utility model discloses a spraying device with a protection function, and particularly relates to the technical field of metal product processing, the spraying device comprises a base and a spraying box fixedly connected with the top of the base, the top of the spraying box is fixedly connected with a box body, and a groove is formed in the box body. A rotating rod is arranged in a groove, a disc is arranged at the bottom end of the rotating rod, a spring is arranged on the outer wall of the disc, a first magnet is arranged at the bottom end of the disc, a second magnet is arranged on one side of the first magnet, a sliding groove is formed in the groove, a sliding plate is arranged in the sliding groove, a positioning rod is arranged at one end of the sliding plate, and a third magnet is arranged at the top of the positioning rod. According to the device, when gas remaining in the spraying box is absorbed and filtered, the device can replace the filter plate for adsorbing the gas in time, and the situation that the filter plate is not replaced in time, so that untreated gas flows out to pollute the surrounding environment is prevented.

The invention discloses a coking waste gas treatment device which comprises a tower body, the tower body comprises a tower shell, a plurality of isolation bearing plates are arranged in the tower shell, and an activated carbon adsorption assembly is arranged on the isolation bearing plate on the uppermost layer; a gas absorption mechanism is arranged on the isolation bearing plate below the activated carbon adsorption assembly, and comprises a plurality of absorption cylinders filled with absorption liquid. According to the invention, through the multi-stage gas absorption mechanism arranged in the vertical direction, different absorbents can be adopted to absorb and treat coking waste gas, and by combining the uppermost activated carbon adsorption assembly, the treatment efficiency is high, the treatment effect can be ensured, and the device can be suitable for treating high-concentration waste gas, and is high in integration level and small in occupied area.

We provide a cavity ring-down spectrometer that enables accurate measurement of extremely low-temperature samples. [Solution] The gas absorption spectrometer is a gas absorption spectrometer for measuring a sample gas and comprises a resonator 100A including at least two mirrors, a laser light source that emits laser light for irradiating the resonator 100A, and a photodetector for detecting the light extracted from the resonator. The resonator includes an inner chamber 1A that houses the mirrors 21 and 22 and forms a measurement space 15 into which the sample gas is introduced, an outer chamber 3A disposed outside the inner chamber 1A for vacuum insulation of the measurement space 15 from the outside, and a cooler 9 disposed within the outer chamber 3A, spaced apart from the inner chamber 1A, and having an internal space through which a refrigerant flows.

The invention discloses a hydrogen chloride gas absorption device-modified double-path pure water absorption system and a process method, and relates to the technical field of chemical waste gas treatment and resource recovery. The device comprises a hydrochloric acid synthesis furnace, a first-stage falling film absorber, a second-stage falling film absorber, a combined tail gas absorption tower and a tail gas purification unit which are sequentially connected, as well as a pure water supply system and an automatic control system. The system is characterized in that the pure water supply system is divided into two independent branches through a water inlet header pipe to be connected to the combined tail gas absorption tower, and each branch is provided with an automatic regulating valve. According to the method, a traditional single-path water absorption system is transformed into a double-path standby system through low-cost technical improvement of an existing single-path absorption device, automatic and rapid switching to the other path when one path breaks down is achieved, and therefore the problems that in the prior art, production is discontinuous, product concentration fluctuation is large, and potential safety hazards exist are effectively solved; the effects of efficiently, continuously and safely producing high-concentration hydrochloric acid and realizing near-zero emission of tail gas are achieved.

1. Name of the product in this design: Gas Absorption Cell (Long Optical Path Multiple Reflections). 2. Purpose of this design: for gas detection and gas measurement. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

A calibration method includes receiving data characterizing a first pressure broadening coefficient, a second pressure broadening coefficient and a third pressure broadening coefficient of the target gas absorption associated with a first background gas, a second background gas and a third background gas, respectively. The method further includes, determining a molar ratio associated with the second background gas and the third background such that an effective pressure broadening coefficient associated with a target gas mixture including the second background gas and the third background gas mixed at the determined molar ratio is within a predetermined threshold of the first broadening coefficient. The target gas mixture further includes a target gas. The method also includes calibrating a gas analyzer using the target gas mixture to replace the calibration of the target in the first background gas. The calibration is based on absorption of electromagnetic radiation by the target gas in the target gas mixture.

The invention discloses a gas detection device and method based on absorbed electron energy, and belongs to the technical field of gas sensing and detection. According to the method, electrons emitted by an electron emission source enter a gas chamber containing mixed gas to be detected, the gas absorbs the electrons with specific energy, particles at a lower energy level jump to an upper energy level, the absorbed specific electron energy is used for marking the gas, and the gas concentration is reversely deduced according to the energy variation. The method has the remarkable advantages that the electron energy is used for exciting the gas to complete the transition of the gas energy level, different energy electrons emitted by the electron emission source have continuity, the change of the current representation number corresponds to the change of the electron energy absorbed by the gas, and the gas is distinguished according to the difference of the absorbed electron energy.

The invention relates to the technical field of low-temperature methanol washing, in particular to a low-temperature low-sulfur low-carbon methanol washing method matched with a pulverized coal gasification device and a device thereof.The method has the advantages that low-carbon methanol is high in CO2 gas absorption energy, low-H2S methanol is high in synthesis gas absorption energy and high in use efficiency, a medium-pressure flash evaporation process is advanced and reasonable in arrangement, and low-sulfur low-carbon methanol is obtained. And the low-temperature methanol washing device is low in comprehensive energy consumption.

A gas sensor (100) is described, which comprises a gas absorption cell (6), configured to house a gas to be detected, an incandescent light bulb (1) comprising a glass bulb (2) and a filament (3) enclosed in the glass bulb (2). The gas sensor (100) also comprises a first detector (4), configured to detect radiation in a first wavelength range of 1-5 um, and a control unit (7), configured to provide a drive current through the filament (3) of the incandescent light bulb (1) during operation of the gas sensor (100). The gas sensor comprises a second detector (5), configured to detect radiation in a second wavelength range of 6-15 µm radiation. The second detector (5) is arranged such that the second detector (5) is illuminated by radiation from the incandescent light bulb (1) during operation of the gas sensor (100).

The invention discloses a battery pole piece, a preparation method thereof and a battery, relates to the technical field of batteries, and aims to solve the problem that the internal pressure of the battery is large due to the fact that the battery generates gas in circulation and storage processes. The battery pole piece comprises a current collector, a tab and a material layer, the tab is arranged on one side of the current collector along the first direction; the first direction intersects with the thickness direction of the battery pole piece. The material layer includes an electrode active material layer and at least one gas absorbing layer. The electrode active material layer is arranged on at least one side of the current collector along the second direction. The at least one gas absorption layer is arranged on at least one side of the electrode active material layer along the first direction, and the at least one gas absorption layer and the electrode active material layer are arranged on the same side of the current collector. The second direction is the thickness direction of the battery pole piece. The material of the gas absorption layer comprises a porous material and an insulating material.

A system (10) includes a turbine (56) configured to rotate a rotary shaft (118) about an axis of rotation (700). The system (10) further includes a gas capture system (20) having an absorber (452) configured to absorb an undesirable gas (542) from an exhaust gas (62) into a solvent (544). The gas capture system (20) also includes a stripper (454) configured to strip the undesirable gas (542) from the solvent (562). Additionally, the gas capture system (20) includes a solvent circuit (458) coupled to the absorber (452) and the stripper (454). The solvent circuit (458) is configured to circulate the solvent (544) through the absorber (452) and the stripper (454). Furthermore, the turbine (56) is configured to rotate at least one of the absorber (452) or the stripper (454).

The utility model discloses sensor packaging and welding equipment, which belongs to the technical field of sensor welding and comprises a worktable, a fixing frame fixedly mounted on the worktable, a movable guide rail fixedly mounted at the bottom of the fixing frame, an electric telescopic cylinder fixedly mounted on the movable guide rail, and a laser welding head fixedly mounted on the electric telescopic cylinder. A clamping table is arranged at the top of the workbench, a gas filtering mechanism is arranged on the fixing frame and comprises a first fixing frame fixedly installed on the fixing frame, and one side of the first fixing frame is connected with a suction pipe installed on the fixing frame. Through the arrangement of the gas filtering mechanism, irritant gas generated in the welding process of the sensor can be filtered, the irritant gas is exhausted after being absorbed and filtered, the influence of drifting of the irritant gas on the working environment is effectively avoided, meanwhile, the harm to human health is reduced, and the welding quality of the sensor is improved. And the welding equipment is more practical.

This enhances the carbon dioxide absorption efficiency even when the gas supplied to the carbon dioxide capture device is at a low temperature. [Solution] The carbon dioxide recovery device comprises a gas introduction line into which gas containing carbon dioxide is supplied from the outside; a scrubbing tower that cleans the gas by bringing the gas supplied to the gas introduction line into contact with a cleaning solution; an absorption tower into which an absorbent liquid capable of absorbing carbon dioxide in the gas is introduced and absorbs the carbon dioxide in the gas that has passed through the gas scrubbing tower; a regeneration tower that heats the absorbent liquid that has absorbed carbon dioxide, separates the carbon dioxide from the absorbent liquid, and regenerates the absorbent liquid; and a heating unit that heats the gas supplied to the absorption tower.

The present application relates to the technical field of hydrocarbon removal purifier, provide a kind of portable hydrocarbon removal purifier, including: purifier body, the outer surface of the purifier body is fixedly connected with suction long tube, one end of the suction long tube is fixedly connected with thick cylinder, the outer surface of the thick cylinder is equipped with multiple hollow grooves, the inner wall of the thick cylinder is fixedly connected with multiple lugs, the outer surface of multiple The lug is fixedly connected with spring two, one end of multiple spring two is fixedly connected with movable ring, the inner wall of the thick cylinder is equipped with multiple sliding grooves, the movable ring is slidably connected in the inside of multiple sliding grooves, in the present application embodiment, thick cylinder is absorbed into its inside gas, mainly by external power supply to start motor, motor drives suction fan to rotate, at this time suction fan absorbs gas, dust screen is arranged in the inside of movable ring, mainly used to isolate dust in gas, prevent dust from entering into the inside of purifier body through suction long tube.

The application discloses a medical pipe extruding machine with a waste gas treatment device and relates to the technical field of extruding machine production. The medical pipe extruding machine with the waste gas treatment device utilizes the negative pressure generated in the suction port and the layer pipe when airflow flows at high speed in the annular pipe and the conveying pipe b, absorbs the gas flowing out of the other side outlet of the extruding machine into the annular pipe by using the negative pressure generated in the suction port, and absorbs the waste gas generated by the work in the extruding machine into the inside of the filter cylinder when the layer pipe generates the negative pressure. The waste gas can be sucked into the pipe by using the air pressure difference. Compared with the traditional cleaning mechanism, the pipe only needs to be replaced when the pipe is blocked, the cost is lower, the cleaning is faster, and the suction mechanism can protect the air extractor from being blocked by dirt.

The embodiment of the invention relates to the technical field of sounding laser humidity measurement, and particularly discloses a low-pressure correction fitting method and system for sounding laser humidity measurement. According to the embodiment of the invention, the intensity distribution function is constructed in the frequency domain of the absorption spectral line; constructing a natural broadening linear function and a Voigt linear function of a gas absorption line type; based on the natural broadening linear function and the Voigt linear function, analyzing the influence of the pressure on the gas absorption linear function, and recording an influence analysis result; according to the Voigt linear function and the influence analysis result, low-pressure correction fitting analysis is carried out, and a pressure fitting correction calculation formula is constructed; receiving humidity measurement data of the TDLAS laser humidity measuring instrument, and performing low-pressure correction fitting processing according to a pressure fitting correction calculation formula. A pressure fitting correction calculation formula can be constructed, accurate pressure correction is provided for subsequent measurement of the TDLAS laser humidity measuring instrument, and the water vapor measurement accuracy in the sounding field is improved.

The utility model relates to the technical field of leather production equipment, and provides a gas recovery device for environment-friendly cow split leather production, which solves the problem of insufficient gas absorption caused by design defects of the existing equipment, and comprises a shell, a plurality of spacing plates are arranged in the shell and are arranged at intervals from top to bottom, and the gas recovery device is arranged in the shell. Each partition plate is provided with an opening, the openings in the adjacent partition plates are arranged in a staggered mode, flow guide plates are arranged at the positions of the openings, flow blocking plates are arranged on the partition plates, a plurality of partition tables are arranged between the flow blocking plates and the flow guide plates, and each partition table comprises a vertical barrel and an arc-shaped plate. Each arc-shaped plate is arranged at the top of each vertical barrel, and a plurality of through holes are formed in the peripheral side of each vertical barrel; by means of the through holes formed in the spacing table, gas passes through a liquid layer on the spacing plate, makes contact with absorption liquid and is guided to the two sides of the spacing table under the action of the arc-shaped plates to be retained, and then gas absorption is guaranteed.

The invention belongs to the technical field of gas absorption and separation, and particularly relates to hydrochloric acid methanol tail gas absorption equipment for nicarbazin production, which comprises a shell, an absorption tube, an upper tube plate and a lower tube plate, the upper tube plate and the lower tube plate are arranged in the shell, a liquid inlet cavity and a liquid outlet cavity are arranged in the shell, and the upper end of the absorption tube is fixed on the upper tube plate and penetrates into the liquid inlet cavity; the lower end of the absorption tube is fixed on the lower tube plate; the device further comprises an overflow pipe and a detection adjusting device, the overflow pipe slidably sleeves the upper end of the absorption pipe, and an overflow port is formed in the side part of the overflow pipe; the detection adjusting device comprises an upper mounting seat, a lower mounting seat, a fixing shaft, a collecting barrel, an elastic supporting piece and a target rod which is fixedly arranged on the collecting barrel and extends up and down, the collecting barrel is located in the center of the absorption pipe, a displacement sensor and an overflow pipe telescopic piece are arranged on the upper mounting seat, and the displacement sensor is used for detecting the displacement amount of the target rod; the overflow pipe telescopic piece is connected with the overflow pipe and used for driving the overflow pipe to ascend and descend.