52results about How to "Short rinse time" patented technology

The invention relates to a dual-effect well-cementing pad fluid using a suspending agent as a surfactant, and mainly solves problems that present well-cementing pad fluid is added with high-molecular polymer grade inorganic suspending agent which can influence compatibility and cement sheath cementation and thus influence sealing effect of well cementing and exploitation operation in a later stage. The dual-effect well-cementing pad fluid comprises the following components by weight parts: 12-20 parts of a flushing suspending agent, 0.2-1 part of an antifoaming agent, 0-420 parts of a weighting agent and 100 parts of water. The dual-effect well-cementing pad fluid using a suspending agent as a surfactant can eliminate adverse influences of inorganic soil and the high-molecular polymer in the well-cementing pad fluid on the compatibility and the cement sheath cementation, improve flushing and displacing effects on a drilling fluid, and guarantee quality of well cementing and the exploitation operation in the later stage.

A method and an apparatus for removing a liquid, i.e a wet processing liquid, from a surface of at least one substrate is disclosed. A liquid is supplied on a surface of substrate. Simultaneously or thereafter besides the liquid also a gaseous substance can be supplied thereby creating at least locally a sharply defined liquid-vapor boundary. The gaseous substance and the liquid can be selected such that the gaseous substance is miscible with the liquid and when mixed with the liquid yields a mixture having a surface tension lower than that of the liquid. According to the invention, the substrate is subjected to a rotary movement at a speed to guide said liquid-vapor boundary over said substrate thereby removing said liquid from said substrate.

A contaminated soil organized seepage in situ forced purification method comprises the following steps: arranging vertical waterproof curtains at the periphery of contaminated sites to isolate and avoid seepage, excavating seepage channels, excavating water collecting wells, preparing leaching solution, and leaching contaminated soil. The method adopts seepage open channels to divide contaminated site leaching units and overcomes the shortcoming that difference of soil quantity of large-area contaminated sites is large so as to result in an unstable leaching effect. The contaminated soil organized seepage in situ forced purification method adopts layered excavating of main open channels, branch open channels and water collecting channel, thereby shortening vertical seepage distance of leaching solution and reducing excavated volume of contaminated site soil during construction. The leaching solution performs submerging, immersing, seepage and leaching in layered mode, thereby promoting sufficient reaction between the leaching solution and contaminant. By means of re-purification of remained contaminant in soil layers after leaching through subsequent leaching, residual quantity of the contaminant in soil is greatly reduced, leaching effect is improved, operation is convenient and fast, controllability of the contaminant is strong, and actual engineering quantity is small.

The invention relates to a roller extrusion type washing machine. The roller extrusion type washing machine comprises a tank body (1) provided with a glass observation window, wherein a water containing bucket (11) is hung on the tank body through a hanging spring (2) and a shock absorber (14), an electric control device (4) and a detergent box (3) are mounted at the front upper part of the tank body, and a water supply electromagnetic valve (16), a liquid level sensor (17) and a draught fan (18) are mounted at the rear upper part of the tank body; a balancing weight (5) is arranged on the water containing bucket (11), a water inlet is linked with the detergent box (3) through a flexible pipe, a draining hole is linked with a sewage discharging pump 12 through a pipeline, a drying hole islinked with the draught fan (18) through a pipeline, a dewatering bucket (10) is mounted in the water containing bucket, a driving shaft (20) of the dewatering bucket penetrates through a bottom center hole of the water containing bucket (11), is in sliding fit with the water containing bucket (11) and is fixedly linked with a big belt wheel speed device 19, and the dewatering bucket (10) and thewater containing bucket (11) are horizontally placed; and three groups of extrusion plates (8) is linked to the bucket wall of the dewatering bucket (10) through a hinges (6), and the mounting interval between each the extrusion plates (8) is 120 degrees. The roller extrusion type washing machine has the main function that the roller extrusion type washing machine can be matched with the extrusionplates so as to finish the extrusion washing and spin-drying of clothes.

The invention relates to a method and a system for thermally washing a pipeline, which have the advantages of convenient method, low energy consumption and good washing effect. The method comprises the following steps of: (1) starting two closed type water pumps after a system pipeline and an expansion tank are filled with water and deflated, circulating in a closed mode for one hour, and then stopping the pumps and discharging the water; (2) starting two closed type water pumps after the system pipeline and the expansion tank are filled with water and deflated again, introducing heating steam to the expansion tank by opening a control valve, cutting off the heating steam source after the water temperature rise to 60 DEG C, stopping the pumps after the system is washed for two hours, completely discharging the water in the system in a multi-point and discontinuous discharging mode during and after the washing period, and waiting for the system pipeline to be completely cooled down; and (3) washing until the washing water quality is detected to be qualified by repeatedly executing step (2).

An antistaling agent for cooked bamboo shoot is prepared from sodium D-isoascorbate (76-89 wt.%), potassium sorbate or citric acid (10-20 wt.%), and sodium pyrophosphate (1-4 wt.%). Its application method includes immersing the cooked bamboo shoot in clean water, adding said antistaling agent and edible salt, vacuumizing and sealing. Its advantages are long antistaling period (6 months), and improving quality of bamboo sheet.

The invention relates to a full-automatic self-cleaning filter. The full-automatic self-cleaning filter comprises a filter body, wherein an electric motor is arranged at the upper end of the filter body, a water inlet tube and a water outlet tube are arranged at the side ends of the filter body, a coarse filter screen and a fine filter screen are arranged in the filter body, a moving plate is arranged between the coarse filter screen and the fine filter screen and is installed on the inner wall of the filter body, a fixed plate is installed on the upper side of the fine filter screen, a rotating rod penetrates out of the fixed plate and is driven by the electric motor to rotate, a plurality of waste sucking nozzles are distributed on the rotating rod and are communicated with an internal channel of the rotating rod, a waste discharge cavity is formed between the top of the filter body and the fixed plate, a plurality of waste discharge holes are formed in the outer wall of the part, in the waste discharge cavity, of the rotating rod and are communicated with the waste discharge cavity, and the waste discharge cavity is communicated with a waste discharge valve. The filter can carry out automatic back wash, and is short in wash time, high in working efficiency and good in filtration performance.

The invention relates to a method for leaching heavy metal contaminated soil by ultrasonic strengthening organic acid. The method comprises the steps of firstly, mixing organic acid and the heavy metal contaminated soil, and then leaching the heavy metal contaminated soil by the ultrasonic strengthening organic acid, wherein the ultrasonic frequency is 20-40kHz, the ultrasonic sound energy density is 20-50W / L, and the time for leaching the heavy metal contaminated soil by the ultrasonic strengthening organic acid is 5-20 minutes. After the method is used, the leaching effect of the heavy metal contaminated soil is improved, and the morphology distribution of the heavy metal is changed; the repair for leaching the heavy metal contaminated soil by the ultrasonic strengthening organic acid is an environment-friendly repair method; the method is simple in technology, short in leaching time and good in repairing effect.

The invention discloses a composite chemical leaching method for remediation of heavy metal contaminated soil. The method includes: leaching heavy metal contaminated soil 1-3 times by a composite leacheate prepared from ferric chloride and an organic acid, then further conducting leaching 1-3 time with distilled water, and finally separating the leacheate from soil. The method provided in the invention has the advantages of good treatment effect, short leaching time, no secondary pollution, simple operation, relative low cost, a highest cadmium removal rate of over 80%, and a highest lead removal rate of over 55%. The iron-containing compound involved in the invention is used as an improver of paddy soil. The residue of ferric chloride has a positive effect on chemical properties of soil, and cannot destroy the soil structure. The used organic acid is easy to degrade, and the degradation product can become nutrients of plants and is environment-friendly. The final leaching by water can reduce the content of metal ions and the leacheate residue in the remedied soil, thus being in favor of later crop tilling.

The invention discloses an automatic anus-flushing multifunctional device for a medical rehabilitation nursing bed and a nursing chair toilet, which belongs to the field of medical apparatuses and aims to mainly solve the problems that bedridden patients, disabled men and old people cannot take care of themselves and have disturbances in going to the toilet. But the traditional closestool cannot satisfy needs. The automatic anus-flushing multifunctional device for the medical rehabilitation nursing bed and the nursing chair toilet comprises a low-noise air pump and an electric expansion link, wherein the electric expansion link is positioned at a side opening on the closestool; a direct-current motor outlet shaft connection screw rod is meshed with a worm wheel; a pinion wheel is fixed on a central shaft side of the worm wheel; one side of a gearwheel is meshed with the pinion wheel; the other side of the gearwheel is meshed with the expansion link with a rack; a nozzle is fixed at the front end of the expansion link; the expansion link can move back and forth in a fixed guide sleeve; the upper end of a gas and liquid heating barrel body is connected to the low-noise air pump; the side face of the upper end of the barrel body is connected to a water tank; the lower end of the barrel body is connected to the electric expansion link; a heating and sensing coil is wound around the excircle of the barrel body; and at a rear upper side opening of the closestool, a warm wind dryer and a deodorizing device are arranged on the two sides of the electric expansion link respectively. The multifunctional device is the multifunctional device which is controlled by a computer and integrates automatic anus-flushing, drying, deodorizing, excrement stirring and crushing, flushing and sterilizing functions. The multifunctional device brings comfort, cleanness and sanitation to the patients and the old people and brings great convenient to nursing.

The invention relates to a sewage treatment filter including a filter body, a filter net is arranged in the filter body, a sewage cavity is between a cover body and a stationary plate, a clear water cavity is between the stationary plate and a bottom cover, a water inlet pipe is arranged on the outer wall of the upper side of the filter body, a water outlet pipe is arranged on the outer wall of the lower side of the filter body, the water inlet pipe is communicated with the sewage cavity, the water outlet pipe is communicated with the clear water cavity, a plurality of water inlet holes are arranged on the stationary plate, the water inlet holes are communicated with the sewage cavity and the clear water cavity, an electric motor is arranged on the upper end of the filter body, the electric motor drives a transmission shaft to rotate, the transmission shaft extrudes into the filter body, a stainless steel brush is arranged on the transmission shaft, the stainless steel brush can clean the inner wall of the filter net, the bottom cover is provided with a sewage drain valve in penetration manner, and cleaned impurities are discharged by the sewage drain valve. The sewage treatment filter has simple structure and reasonable design, and can achieve automatic back flush, the flush time is short, efficiency is high, and filtering performance is good.

The invention provides an optical resistance stripping process which comprises the following steps: wet cleaning base to strip optical resistance, transmitting it with high speed and using Aqua Knife to clean base at the same time. The invention also provides an optical resistance-stripping device, which can be applied in optical resistance stripping steps of semiconductor process.

The invention discloses a treatment method of heavily-contaminated soil. The treatment method comprises the steps that H3PO4, NaOH, humic acid, organic fertilizers, polysorbate and tannic acid are selected to be compounded into a leaching agent to leach the contaminated soil; sewage obtained after leaching is precipitated, precipitated sludge is dried, pyrolyzed and activated, microbial strains are added, and then biological activated carbon is prepared; and fertility detection, heavy metal detection and soil structure detection are conducted on the leached soil, according to the detection results, the leached soil is fertilized appropriately, or the leached soil and the contaminated soil are subjected to mixing backfilling according to a certain proportion so as to reach the quality standards of different soil environments, the biological activated carbon is applied to the soil subjected to mixing backfilling, and thus activated carbon and microorganism combined treatment and remediation are conducted on the soil. The treatment method is simple and easy to carry out, and the cost is low; and the sewage obtained after leaching is treated and then directly prepared into the activated carbon, the treatment method can be used for treatment of the contaminated soil, and leached metal can be fixed, so that secondary pollution is avoided, and full utilization of the whole contaminated soil is achieved.

The invention discloses a water supply pipeline flushing system and method. According to the water supply pipeline flushing system and method, a gas-water pulse control instruction is sent out througha control terminal; a pulse controller is adopted to send the pulse frequency of a data signal and the solenoid valve switching frequency in unit time to a solenoid valve switch through electrical signals; a pulse generator generates a pulse signal according to the pulse frequency signal of the pulse controller and the solenoid valve switching frequency in unit time; high pressure gas and gas flow are conveyed through an air compressor, and a gas storage tank releases compressed gas under the control of the pulse controller through the pulse generator; a data processing terminal displays theworking condition of a first control unit through a main control interface and monitors the real-time change of a pressure measuring point in a water supply pipeline; a data collection box collects and controls pressure data in the flushing process of the water supply pipeline; and an exhaust device is installed on an exhaust hole of the water supply pipeline to be flushed and checks whether waterand gas exist on the exhaust hole of the water supply pipeline to be flushed or not. According to the water supply pipeline flushing system and method, the impact force is strong, the water consumption is reduced, the flushing time is short, and quite good economic benefits are achieved.

The invention provides a drum extrusion type washing machine improved based on a conventional washing machine, and through change of the washing mode, the washing capability is obviously improved, theabrasion rate is reduced, and the energy consumption is reduced. The drum extrusion type washing machine comprises a housing, a damping device, a water-containing tub, a dehydration tub, an extrusiondevice, an electric control device, a water supply and drainage device, and a driving device. Four corners of the housing are connected to the water-containing tub through the damping device, the dehydration tub is arranged in the water-containing tub, an inner wall of the dehydration tub is provided with two movable extrusion plates, the extrusion plates are rectangular meshed plates bent in a certain radian, the extrusion plates are folded during washing, the extrusion plates isolate the dehydration tub into two independent spaces, clothes can rotate in the water with the dehydration tub and extruded during rotation, the clothes roll over and absorb water when rotation is stopped, and extrusion washing of the clothes can be realized in a circulated and repeated manner. During drying, the two extrusion plates are attached to the inner wall of the dehydration tub under the effect of a centrifugal force due to the special shape of the extrusion plates, and centrifugal dehydration and drying of the clothes are not influenced.

The invention discloses a soil flushing agent and the application of the soil flushing agent to the aspect of polluted soil remediation. The soil flushing agent comprises the following components in parts by mass: 80-88 parts of water and 12-20 parts of polyaspartic acid; the soil flushing agent further comprises nitric acid; and according to the adding amount of nitric acid, the pH value of the soil flushing agent can be adjusted to 3-5. The soil flushing agent disclosed by the invention can be applied to the aspect of polluted soil remediation; the components of the soil flushing agent are simple, the soil flushing agent is environmentally friendly and free from pollution, and the secondary pollution to soil is prevented; polluted soil is remedied by using the soil flushing agent through an ultrasonic flushing method; the soil flushing agent has the advantages that the flushing period is short and the remediation effect is good; and both heavy metals and organic pollutants in the soil can be removed simultaneously.

The invention discloses a boiling type micro-foam soil pollution desorption device and method suitable for a coking field, the device comprises a pollutant desorption device, an ozone conveying pipeline, an airflow conveying pipeline, a micro-foam generation device and a waste gas and waste liquid collection device, and the ozone conveying pipeline is connected with an ozone inlet of the pollutantdesorption device to provide ozone to the pollutant desorption device to oxidize organic pollutants in coking soil; the airflow conveying pipeline is connected with an airflow inlet of the pollutantdesorption device and provides airflow for the pollutant desorption device so as to realize soil fluidization and boiling; the micro-foam generating device is connected with a foam inlet; the waste gas and waste liquid collecting device is connected with a waste liquid outlet and a waste gas outlet; the desorption method is divided into three stages: (1) performing ozone oxidation and soil boiling, and starting an ozone conveying pipeline and an airflow conveying pipeline; (2) eluting surfactant micro-foam, closing the ozone conveying pipeline and the airflow conveying pipeline, and starting the micro-foam generating device; and (3) collecting waste gas and waste liquid.

The invention discloses an integrated efficient environment-friendly sewage treatment mechanism. The integrated efficient environment-friendly sewage treatment mechanism comprises a reaction tank, thereaction tank is composed of an anoxic pond, a first aerobic pond and a second aerobic tank which are sequentially connected, and biological filler is filled inside the reaction tank; a water inlet is arranged on the left of the anoxic pond, a water outlet is arranged at the top of the right end of the second aerobic tank, and a first filler blocking device is arranged at the top of the inside ofthe anoxic pond. The integrated efficient environment-friendly sewage treatment mechanism is high in denitrification and dephosphorization capacity; simply by adding a deep treatment instrument afterthe second aerobic pond, a sewage deep treatment function can be achieve, and output water can meet the categories IV of national surface water standards; during a forward flushing process, pond capacity is made full use of, and during operation, a continuous water inputting manner is applied to avoid influence on water treatment processes, and backup treatment units as well as investment and construction costs can be saved.

The invention discloses a filtering element chemical cleaner for a prefilter of a condensate polishing system and application. The filtering element chemical cleaner comprises an alkaline cleaner A and an acid stripper B, wherein the alkaline cleaner A comprises analytical pure sodium bicarbonate , hydrogen peroxide and sodium dodecyl benzene sulfonate; and the acid stripper B comprises analyticalpure glycolic acid, formic acid and sodium fluoride. The application method of the filtering element chemical cleaner comprises the steps of acid washing to strip salt deposits, alkaline washing to remove oil stains and rinsing with clear water. The filtering element chemical cleaner is used for cleaning the prefilter of the condensate polishing system and can remove iron oxide in a filtering element as well as silicate, copper oxide, the oil stains and the like, therefore, a filtering element channel of the prefilter is restored, a running pressure difference is lowered, the running cycle isprolonged, and water vapor quality is improved.

The invention relates to a small bearing washing structure which comprises a washing tank; a guide bracket of bearings and a spray washing pipe located on the side of the guide bracket are arranged in the washing tank; a U-shaped conduit stretching into the bottom of the washing tank is arranged at the lower end of the guide bracket; a plurality of spray pipes are arranged on the side surface of the spray washing pipe; nozzles of the spray pipes are arranged obliquely and upwards, and face towards the bearings on the guide bracket; an arc-shaped pipe is arranged at the lower end of the spray washing pipe; the arc bending direction of the arc-shaped pipe is consistent with that of the U-shaped conduit; and the spray pipes are arranged on the side surface of the inner arc of the arc-shaped pipe. The small bearing washing structure adopts the spray washing pipe to wash the two side surfaces of the bearings, and washes the bearings thoroughly and cleanly, and the washing time is short. The small bearing washing structure is simple in structure and low in cost, and is suitable for popularization and use.

The invention belongs to the field of production of membranes and in particular relates to a flat-straight winding device of a hollow fiber membrane, and the device is used for membrane production enterprises and can be widely introduced in the production enterprises for hollow ultrafiltration and hollow nanofiltration and the like. The device can be used for solving the difficulty that in membrane spinning, due to round winding, different lengths and uneven pore diameter of the inner arc and outer arc of the membrane wall of the hollow fiber membrane are caused by the arc shape. The membrane spun by the linear winding device is not influenced by the arc shape, is even in thickness and uniform in pore diameter of the membrane wall; and the membrane-spinning quality is improved, thus the device is a great progress in the membrane industry. The flat-straight winding device consists of three parts, namely a transmission part, a shifting fork part and a flat-straight winding wheel disc; and the flat-straight winding wheel disc comprises a shaft sleeve, a wheel disc framework and a flat-straight disc surface.

The invention discloses a measurement method of the content of cyanide in drugs. The method comprises the following steps: (1), performing pretreatment on a drug sample through an acid distilling method: performing heating distilling through an acid distiller or a round-bottom flask, completely converting and separating out cyanide from the drug sample, and absorbing the cyanide through sodium hydroxide, so as to obtain a cyanide absorption liquid to be tested; (2), measuring the cyanide through an ion chromatography method: ensuring that the adopted chromatographic conditions are as follows:an ampere detector, an Ag working electrode, an Ag / AgCl reference electrode, an anion separating column, an anion protective column, injection volume of 25 micro liters, flow rate of 1.0 mL / min, temperature of 30 DEG C, and a NaOH solution with the flowing phase being 4mmol / L. The method has the advantages that the concentration of CN- presents a good linear relation within a measurement range, the detection limit is 0.0103 microgram / g, the sample adding standard recovery is 96.0 to 101.1 percent, and the degree of precision is 1.01 to 2.07 percent; the chromatographic conditions can obtain the superior detection limit and precision degree and smaller leaching time, the cyanide retention time can reach 7.78 min, and the lowest detection limit is 0.004 gm / L.

The invention provides a direct-discharge water-saving pedestal pan with an elastic water seal door by using water impact force. In the invention, a horizontal water outlet is arranged on an outer end of a lower water port of a pelvic cavity ceramic main body; a downward bulge is arranged on the top end of a joint between the horizontal water outlet and the lower water port; and an elastic water seal door assembly is arranged on the horizontal water outlet and can reserve a sealing water level which is higher than the bulge in the horizontal water outlet under a balanced condition without an external force, and the elastic water seal door assembly is elastically and extensionally deformed to be opened under the action of the water impact force so that water and pollutants are rapidly discharged into a sewer. The pedestal pan or squat pan using the elastic water seal door device is very water-saving (1L of water is used in the case of low water mark and 3L of water is used in the case of high water mark), and is far superior to provisions of national and international water-saving standards; and the flushing time is very short, the pollutant backflow and peculiar smell are avoided, and 100% of sealed water is replaced, thus being beneficial to health and environmental protection, and effectively avoiding the problem that the traditional pedestal pan and squat pan are easily blocked to affect applications.

The invention relates to a reverse cleaning filter. The reverse cleaning filter comprises a filter body; the upper end of the filter body is provided with an electric power motor; a coarse filter screen and a fine filter screen are arranged in the filter body; a flexible plate is arranged between the coarse filter screen and the fine filter screen; the flexible plate is arranged on the inner wall of the filter body; the upper side of the fine filter screen is provided with a fixed plate; a rotating rod penetrates the fixed plate; the rotating rod is driven by the electric power motor to rotate; each side of the outer wall surface of a section of rotating rod which extends into the fine filter screen is provided with a row of bristles; the inner wall of the fine filter screen can be cleaned through he bristles under the action of the rotating rod; impurities after cleaning are discharged through a waste discharge valve; an exhaust valve is arranged on the outer wall surface of the filter body; the filter body is provided with a differential pressure transmitter which is connected with a controller; the controller is used for controlling the starting and stopping of the electric power motor. According to the reverse cleaning filter, the automatic reverse washing can be implemented, the washing time is short, the working efficiency is high, and the filtration performance is good.

The invention relates to the field of kitchen utensils, and particularly relates to a dishwasher rinsing device. A dishwasher rinsing device comprises a dishwasher nozzle reversing rotating device (1), a water circulation system (2) and a control box (3). A dishwasher nozzle reversing rotating device (1) comprises a synchronous belt linear guide rail (4), a connecting base (5), a water spraying system (6) and a plastic drag chain (7). The water circulation system (2) comprises a water return tank (33), a sealing air cylinder A (34), a sealing air cylinder B (35), a water tank A (36), a water tank B (37) and a booster pump (38). The device is easy to operate, rinsing is manually controlled, the rinsing efficiency is high, the time is short, the rinsing effect is good, and water is saved.

The invention provides an eluting agent for repairing stibium and arsenic composite contaminated soil. The eluting agent comprises, by weight, 4-8 parts of sodium dihydrogen phosphate, 2-5 parts of tartaric acid and 1-4 parts of ammonium oxalate. The eluting agent is used for repairing the composite contaminated soil containing Sb and As, can rapidly remove stibium and arsenic in the composite contaminated soil and is high in removal rate and shorter in eluting time. The eluting agent with simple components is remarkable in effect, low in cost and excellent in economical efficiency. The eluting agent can effectively separate stibium and arsenic in the soil, soil fertility can still be kept after use, crops are planted after the soil is repaired, the content of stibium and arsenic in the crops is remarkably reduced, and the growth status and quality of the crops cannot be affected.

The invention relates to a medical linear accelerator deflection coil cleaning device for cleaning clogged impurities in accelerator deflection coils. The device comprises a water purification tank, awater pump, a water separator and a sewage tank which are arranged in sequence. The water purification tank is connected with a water inlet of the water separator through a first high pressure waterpipe, the water pump is arranged on the first high pressure water pipe, the water separator is a six-way water separator, each water outlet is provided with a pressure regulating valve, the water outlets of the water separator are connected with inlets of the accelerator deflection coils through second high pressure water pipes, and the sewage tank is connected with outlets of the accelerator deflection coils. Compared with the prior art, the medical linear accelerator deflection coil cleaning device has the advantages of long service life, low cost, wide range of use, time shortening, convenient installation and the like.

The invention relates to the technical field of municipal pipeline operation, in particular to a municipal pipeline tail end drainage control device. The device comprises a fire hydrant (1), a water inlet connecting pipe (2), an electromagnetic valve (3), a main pipe (6) and an electromagnetic flowmeter (7) which are sequentially connected; a turbidity sensor (4) is mounted on the main pipe (6); the electromagnetic valve (3), the turbidity sensor (4) and the electromagnetic flowmeter (7) are all connected with a PLC automatic control system (5); and the tail end of the main pipe (6) is connected with a drainage pipe (10). The device can realize automatic control and record changes of parameters such as turbidity, flow, time and the like in the municipal water supply pipeline tail end flushing drainage process, is used for finely managing the municipal pipeline tail end drainage process, saves the drainage quantity, improves the drainage efficiency, and improves the water quality of a water supply pipeline.

The invention relates to a dual-effect well-cementing pad fluid using a suspending agent as a surfactant, and mainly solves problems that present well-cementing pad fluid is added with high-molecular polymer grade inorganic suspending agent which can influence compatibility and cement sheath cementation and thus influence sealing effect of well cementing and exploitation operation in a later stage. The dual-effect well-cementing pad fluid comprises the following components by weight parts: 12-20 parts of a flushing suspending agent, 0.2-1 part of an antifoaming agent, 0-420 parts of a weighting agent and 100 parts of water. The dual-effect well-cementing pad fluid using a suspending agent as a surfactant can eliminate adverse influences of inorganic soil and the high-molecular polymer in the well-cementing pad fluid on the compatibility and the cement sheath cementation, improve flushing and displacing effects on a drilling fluid, and guarantee quality of well cementing and the exploitation operation in the later stage.

A monitoring system (2) for a gas engine (1), the engine (1) is a reciprocating internal combustion engine using gas as fuel, the engine (1) is connected to an outlet channel (3) for conducting the exhaust gases out of the engine (1), there is a fan (30) arranged in connection with the outlet channel (3) for flushing the outlet channel (3) with air (A) in case of non-started engine (1) and when there may be unburned fuel gas (G) accumulated in the outlet channel (3). In the system there is at least one NOx-sensor (5) located in the outlet channel (3) in a location where unburned fuel gas (G) may accumulate.