41results about How to "To achieve the purpose of descaling" patented technology

A corrosion-retardant scaling inhibitor for the high-Cl and -Ca water contains proportionally phosphonylic acid, polyphosphonic acid, organic phosphonate, Zn sale, Mn salt, polyacrylic acid, antimildew agent and purified water.

The swirl-flow injection washing water-saving device is formed from swirl-nozzle, swirler and multi-stage injector. Said swirler is mounted in ismetric channel after negative throat nozzle so as to produce rotary jet flow. The injector can be connected after swirl-nozzle, and can inject air into the injector, and can mix the air with rotary water flow so as to form air-water two-phase flow to increase volume flow quantity of fluid and form lots of discontinuous dispersion phase, and said above-mentioned air-water two-phase flow can be jetted from water-saving device for washing car body and other equipment to be cleaned, and can attain the goals of saving water and raising washing effect.

The invention provides a corrosion inhibition scale-removing agent used for CO2 flooding as well as a preparation method and use method of the corrosion inhibition scale-removing agent. The corrosioninhibition scale-removing agent is composed of the following substances, in percentages by weight: 17-21% of benzoic acid thioureido imidazoline, 1-3% of benzoic acid phosphate thioureido imidazoline,9-13% of isopropanol, 7-11% of acetic acid, 11-15% of sodium polyepoxysuccinate, 3-7% of OP-10, 12-16% of quinoline quaternary ammonium, 3-7% of poly(sodium-styrennesulfonate), 5-9% of ethylenediaminetetraacetic acid disodium salt, 11-15% of diethylenetriaminepentaacetic acid pentasodium salt, 2-6% of N-dodecyl methylene bis-sec-ammonium salt, and the balance of water. The corrosion inhibition scale-removing agent provided by the invention overcomes the problem that a current corrosion inhibitor usually has a single corrosion inhibiting effect and a current scale inhibitor usually has a single scale inhibiting effect, can effectively play a corrosion inhibition effect while efficiently preventing scaling of oilfield water, and especially has a better scale-removing effect on barium strontium scale formed by formation water with high barium and strontium ions.

The invention relates to a multi-function anti-scaling / descaling / bacterium-alga inhibition device which mainly comprises a power supply module, a controller module, a fan, a power amplifier integrated package, a spiral wound electric pulse magnetic field coil, an electromagnetic conversion part and other components, wherein the power supply module is used to carry out alternating / direct current conversion, and the control module is used to produce square signals; the power amplifier integrated package adopts a field effect tube paralleling mode, so that sufficient current can be produced, and the output power of the circuit can be further increased, thereby meeting the requirements for magnetic field intensity; the electromagnetic conversion part is mainly used for producing an alternating electromagnetic field; and the spiral wound electric pulse magnetic field coil is equivalent to an inductor wound on a water pipe, thereby producing an alternating magnetic field in the water pipe. Thus, the device provided by the invention is simple and easy to install and is maintenance-free, thereby being a preferred product for industrial anti-scaling / descaling / bacterium-alga inhibition.

The invention discloses a novel anti-scaling electric heating pipe and a water heater. A temperature-sensitive expansion wire is additionally arranged on an electric heating pipe; two ends of the temperature-sensitive expansion wire are fixed separately; and the temperature-sensitive expansion wire is fixed on the electric heating pipe or a mounting seat at one end of the electric heating pipe; the heat-sensitive expansion wire is spirally wound around the outer wall of the electric heating pipe; gaps are left between screw threads formed by the temperature-sensitive expansion wire; and the spacing of the gaps change with the deformation of the temperature-sensitive expansion wire. The temperature-sensitive expansion wire of the novel scale-inhibiting electric heating pipe of the present invention deforms with temperature, so that the gaps formed by the spirals can be gradually closed; scales are adhered to the temperature-sensitive expansion wire; and the temperature-sensitive expansion wire expands when being heat and contracted being cooled, so that the scales can fall off; the screw threads will move during the deformation of the temperature-sensitive expansion wire, and scratch the surface of the electric heating pipe; and therefore, a double anti-scaling effect can be realized. The temperature-sensitive expansion wire servers as a heat transfer medium, and therefore, a contact area between the electric heating pipe and water is indirectly increased, heating speed is improved, and energy can be saved.

The invention discloses a descaling device using water kinetic energy and relates to the technical field of boilers. The descaling device comprises a water feed pipe, a turbine device and a cleaning device. A plurality of small water spray holes are formed in the water feed pipe. The turbine device is mounted on the water feed pipe and comprises turbine blades and a drive shaft. The turbine bladesare rotationally connected with the drive shaft and driven by water sprayed out of the water feed pipe to rotate. The cleaning device comprises a sleeve, a bristlebrush connector and a cleaning bristlebrush. The cleaning device is mounted on the drive shaft, the sleeve sleeves the drive shaft, the bristlebrush connector is fixed to the end of the sleeve, and the cleaning bristlebrush is mounted on the bristlebrush connector; or the cleaning device is mounted on a driven shaft, the driven shaft is connected with the drive shaft through a gear, the sleeve sleeves the driven shaft, the bristlebrush connector is fixed to the end of the sleeve, and the cleaning bristlebrush is mounted on the bristlebrush connector. According to the descaling device using water kinetic energy, kinetic energy ofthe water sprayed out of the water feed pipe in a boiler is used for removing water scale, no manual treatment is needed, and real-time descaling is achieved.

The invention relates to a detergent suitable for a bathroom. Active ingredients of the detergent comprise the following components in parts by weight: 0.5 to 10 parts of citric acid, 1 to 20 parts of sodium citrate, 2 to 8 parts of alkyl polyglucoside, 4 to 8 parts of fatty alcohol-polyoxyethylene ether and 1 to 5 parts of octanesulfonate, wherein preservatives and auxiliary bactericide are further added. The detergent is stable in performance and long in lasting period and has good decontamination effect and bacteriostatic effect for closestools, hand washing sinks, walls of the bathroom and the like; and moreover, the detergent is weakly acidic, smaller in irritation, small in corrosion to metal facilities and smaller in harm to the skin.

The invention relates to the technical field of earphone maintenance equipment, and discloses circular earphone cover surface wiping equipment. The circular earphone cover surface wiping equipment includes a barrel body, the middle position of the top of the barrel body is fixedly connected with a handle through screws, an installation partition plate is fixedly connected between the inner walls of the left and right sides of the barrel body, the middle position of the top of the installation partition plate is fixedly connected with a battery, the middle position of the bottom of the installation partition plate is fixedly connected with a low-speed motor through bolts, the annular side face of the bottom of the inner side of the barrel body is fixedly connected with a connecting circularring, the inner side of the connecting circular ring is movably connected with a rotating disc through a movable ball, an output shaft of the low-speed motor is fixedly connected with the middle position of the upper surface of the rotating disc through the screws, the left side surface of the barrel body is provided with an electric control switch, and the lower portion of the rotating disc is provided with a semi-ring buckle cover. According to the circular earphone cover surface wiping equipment, an earphone cover can be touched, wiped and descaled by arranging wiping cotton, thus the quality of dirt wiping on the large flat surface of the earphone cover is improved, and the purpose of descaling is achieved.

The invention discloses a boiler scale thickness monitoring device and method, and the device comprises a temperature sensor, a descaling device and a control device, and the descaling device is installed in a boiler and is used for removing scale at a certain position in the boiler. The temperature sensors are installed on the outer wall face of the boiler and comprise the first temperature sensor and the second temperature sensor, the first temperature sensor is installed on the outer wall face corresponding to the descaling position of the descaling device, and the second temperature sensoris installed on the outer wall face near the descaling position. The control device is connected with the temperature sensors and used for receiving temperature measurement signals of the first temperature sensor and the second temperature sensor and obtaining the thickness of incrustation in the boiler corresponding to the second temperature sensor through formula calculation by means of the temperature value (difference value) of the two measurement points. According to the scale thickness monitoring device, the boiler metal outer wall temperature values of the descaling point and the non-descaling point are collected at the same time, and the scale thickness in the boiler is calculated. The invention belongs to the technical field of boilers.

The invention discloses an environment-friendly type boiler scale remover which is prepared from the following raw materials in percentage by weight: 10-50% of phytic acid, 5-10% of citric acid, 3-5% of glucose and the balance of water. The environment-friendly type boiler scale remover disclosed by the invention has the advantages of high efficiency, small application amount, low application cost, environmental friendliness, no pollution, small corrosion speed on equipment surface, and convenience in operation as equipment does not need to be hauled in descaling.

The invention discloses a water boiling device, which comprises a water tank, an electric heating element, ultrasonic generators, a high-water level probe, a low-water level probe, a temperature controller, a faucet, a water inlet, a drain outlet, an exhaust hole, a controller and a support, wherein the water tank has a hollow structure made of stainless steel or aluminum alloy and is arranged on the support; one ultrasonic generator is arranged on the wall of the water tank and extends into a water body, or a plurality of ultrasonic generators are distributed on the outer wall of the water tank; the ultrasonic generators transmit ultrasonic waves with the frequency of between 20 and 40kHz and the power of between 200 and 1,000W; and the electric heating element is fixed on the water tank. According to the water boiling device, energy generated by the ultrasonic generators is transferred to 12 water molecular groups, so that the water molecular groups are converted into small micro (small) water molecular groups; the water boiling device is descaled by utilizing the ultrasonic waves; and after the water boiling device runs for 15 days, a scaling layer on the boundary surface of the electric heating element is only 0.001 millimeters, and the middle part of the electric heating element is still kept smooth, so the aims of scale prevention and descaling are well fulfilled.

The invention relates to the technical field of wall-hanging stoves, in particular to a wall-hanging stove with a self cleaning function and a self cleaning method of the wall-hanging stove. The wall-hanging stove comprises a return water pipeline, a heating pipeline, a domestic hot water pipeline, a valve assembly and a detergent supply device. During self cleaning, the domestic hot water pipeline, the heating pipeline and the return water pipeline form a loop through the valve assembly, the detergent supply device includes a detergent storage tank and a control valve, the detergent storage tank is connected to the loop composed of the return water pipeline, the heating pipeline and the domestic hot water pipeline, and the control valve controls the detergent storage tank to be opened andclosed. The wall-hanging stove is provided with the valve assembly and the detergent supply device, during cleaning, the domestic hot water pipeline or the heating pipeline can be switched to be connected with the return water pipeline through the valve assembly, cleaning of the domestic hot water pipeline and the heating pipeline can be simultaneously achieved, meanwhile, the detergent supply device can be automatically opened or closed through the control valve, and the self cleaning function is achieved.

The invention discloses a pipeline descaling device, relates to a descaling and antiscaling device, and solves the problems of high cost, heavy pollution and environmental damage which prevail in the conventional industrial heat-exchange system adopting an ion-exchange method and a chemical method to descale. The pipeline descaling device comprises a casing (1) and two flanges (2); the two flanges (2) are arranged at two ends of the casing (1) respectively; the descaling device further comprises a fixing plate (3), a plurality of groups of alloy blocks (4), and a plurality of stainless steel pipes (5); the fixing plate (3) is arranged inside the casing (1); the alloy blocks (4) are arranged inside the casing (1) from left to right sequentially at equal intervals; the upper end and the lower end of each alloy block (4) are connected with the fixing plate (3) respectively; and the stainless steel pipes (5) are arranged on the alloy blocks (4) in the length direction of the casing (1). The pipeline descaling device can be used for pipeline descaling and antiscaling.

The invention discloses a descaling method which comprises the step that a liquid flows through a scaling unit (2) with the contact area of 10-30m<2> at a flow rate of 0.001-0.004m / s. The invention further discloses descaling equipment and a descaling system. The descaling method can descale the liquids (particularly wet crude produced liquids), is low in cost and convenient to operate, and does not affect normal oil extraction operation.

The invention discloses a descaling method which comprises the step that a liquid flows through a scaling unit (2) with the contact area of 10-30m<2> at a flow rate of 0.001-0.004m / s. The invention further discloses descaling equipment and a descaling system. The descaling method can descale the liquids (particularly wet crude produced liquids), is low in cost and convenient to operate, and does not affect normal oil extraction operation.

The invention relates to the technical field of earphone maintenance equipment, and discloses a round earphone cover surface wiping equipment, which includes a cylinder body, the middle position of the top of the cylinder body is fixedly connected with a handle by screws, and the inner walls of the left and right sides of the cylinder body are fixedly connected There is an installation partition, the top middle of the installation partition is fixedly connected to the battery, the bottom middle of the installation partition is fixedly connected to the low-speed motor through bolts, and the ring side of the inner bottom of the cylinder is fixedly connected to the connection ring, the connection ring The inner side of the cylinder is movably connected with a rotating disc through movable balls, and the output shaft of the low-speed motor is fixedly connected to the middle position of the upper surface of the rotating disc by screws. Half ring button hood. The equipment for wiping the surface of the circular earphone cover is equipped with wiping cotton to contact, wipe and descale the earphone cover, thereby improving the quality of dirt wiping on the large plane surface of the earphone cover and achieving the purpose of descaling.

The invention relates to a surface descaling method based on multi-frequency ultrasonic guided waves and belongs to the technical field of descaling. According to the technical key points of the method, for the medium scaling surface containing liquid load, an energy converter module is placed at the position away from a liquid load scaling area, a signal generation module generates a multi-frequency continuous excitation voltage signal, after being amplified through a signal amplifying module, the multi-frequency continuous excitation voltage signal acts on the energy converter module, ultrasonic guided waves propagated along a structure body are generated, when the guided waves are propagated to the scaling area with the liquid load, some energy is leaked into the liquid, the generated cavitation effect can effectively impact on scale, and the purpose of descaling is achieved. According to the method, the advantage of the large coverage range of the ultrasonic guided waves is utilized for achieving remote online scale removing, equipment to be washed does not need to be shut down, or disassembled, meanwhile, the multi-frequency excitation method can remove the scale more uniformly and effectively, and the removing rate is increased. The method is high in efficiency, the acting range is large, and pollution to environment is avoided.

The present invention relates to a pipe-dredging device, including motor, water pump connected with motor, frequency converter for controlling motor and distribution board, in which the water outlet and water inlet or the water pump are connected with water discharge pipe and water intake pipe, on the water intake pipe a contaminant-removing device is set for quickly removing its internal impurities and direct attached on the wall of the pipe, and its effect is obvious and its operation is simple.

The invention discloses a by-pass flow and online scale absorption instrument integrated device. The device comprises a bracket and a filtering main pipe arranged on the bracket, wherein a water inlet electromagnetic valve is further arranged below the filtering main pipe; the water inlet electromagnetic valve is connected with a first pipeline extending into the filtering main pipe; the water inlet electromagnetic valve is connected with an electric three-way ball valve through a second pipeline; a filtering by-pass flow pipe communicated with the filtering main pipe is arranged at the side part of one end of the filtering main pipe; the filtering by-pass flow pipe is connected with the electric three-way ball valve through a blow-off pipe; an online scale absorption instrument is further detachably mounted at the top of one end of the filtering pipe; the online scale absorption instrument comprises an inserting part and a pipe plug part which are fixedly connected with each other; the inserting part comprises an inner mesh arranged below the pipe plug part and an outer mesh arranged below the pipe plug part and surrounding the inner mesh; both the inner mesh and the outer mesh are electrodes and are arranged with opposite electric properties, so as to produce an electric field. The device ensures that Mg2+ ion is absorbed onto the online scale absorption instrument through the electric field effect, reduces the system water hardness, and achieves the effect of scale prevention; the online scale absorption instrument is convenient to dismount, and water scale can be timely dismounted and cleaned.

The invention provides a crystallization wheel cleaning and cooling device. The crystallization wheel cleaning and cooling device comprises a crystallization wheel, a fixing base and an adjusting frame. The crystallization wheel is rotationally connected with the fixing base through a rotating shaft, and the adjusting frame is connected with a rotating shaft of the crystallization wheel through abearing. The crystallization wheel cleaning and cooling device is further provided with a descaling spray head and a cooling spray head. The adjusting frame is further provided with an adjusting plate, and the adjusting plate is fixedly connected with the adjusting frame through bolts. The bottom of the crystallization wheel is provided with a recovering groove. The descaling spray head and the cooling spray head are both connected with the recovering groove through pipelines. According to the crystallization wheel cleaning and cooling device, the position of the descaling spray head and the water spraying angle of the descaling spray head can be adjusted according to needs.

The invention discloses a broadband electric pulse hard water scale inhibitor which comprises an electric pulse generator and a magnetic field generator, the electric pulse generator comprises a microcontroller, a voltage stabilizing circuit and a full-bridge inverter circuit, the full-bridge inverter circuit and the microcontroller are connected with the voltage stabilizing circuit, the microcontroller drives the full-bridge inverter circuit to convert frequency, the magnetic field generator is a solenoid, and the solenoid is wound on the outer wall of the water pipe and two ends are connected with the full-bridge inverter circuit. The scale inhibitor generates an alternating magnetic field with variable frequency through electric pulses so that positively charged calcium and magnesium ions in water are combined with negatively charged bicarbonate radicals in water in an accelerated manner, the purposes of no scaling and descaling are achieved, pipe cutting is not needed, only a wireneeds to be wound on a home-entry water pipe according to instructions, the method is simple, door-to-door maintenance of professionals is not needed, and unattended operation is achieved. Long-term maintenance operation such as filter element replacement is not needed, and the water scale inhibitor is permanent, convenient and efficient, does not lose the content of trace elements in water, has awater activating effect and is low in power consumption.

The invention discloses a cleaning agent for a sewage collection pipeline of a high-sulfur gas field and a use method of the cleaning agent, and provides a cleaning agent suitable for fouling in a sewage collection pipeline of a high-sulfur gas field. The cleaning agent includes a chelating agent, an anionic surfactant, sodium hydroxide, sodium phosphate, ethylene glycol and an accelerator. The cleaning agent is an alkaline cleaning agent, and the pH value can be controlled in a range of 10 to 14, and the cleaning agent can efficiently dissolve fouling in the sewage collection pipeline of thehigh-sulfur gas field at a lower use temperature.

The invention discloses an on-line scale prevention and removal agent for circulating water, belongs to the technical field of scale removal agents, and effectively solves the problem that an existing circulating water system cannot be integrally cleaned in the production and operation process. Comprising the following raw materials in parts by weight: 30-50 parts of polydiamino-terminated sodium acrylate, 10-30 parts of deionized water, 1-2 parts of an imidazoline surfactant, 1-2 parts of a pH regulator, 1-5 parts of a corrosion inhibitor, 1-5 parts of a chelating agent, 5-10 parts of a dissolving agent and 5-10 parts of a cosolvent. The prepared polydiamino-terminated sodium acrylate is used as a main raw material, descaling operation of a circulating water system can be carried out under the condition that normal operation of the system is not affected, the descaling effect is good, the efficiency is high, meanwhile, by adding the imidazoline type surfactant, the corrosion inhibitor, the chelating agent and the cosolvent, the descaling effect is good, and the descaling effect is good. The scale remover is simple in structure and convenient to use, can effectively prevent calcium and magnesium ions from reacting to form precipitates in the descaling process, avoids the phenomenon that dirt blocks a pipe, is low in cost, and has good economic benefits and wide market prospects.

The invention discloses a water circulation filtering device and relates to the technical field of filtering, the water circulation filtering device comprises an air cleaning filter tank body, air cleaning filter paper layers, an oil spraying cleaning filter tank body and a water curtain oil filtering mechanism, wherein an isolation plate is horizontally fixed below the inside of the air cleaningfilter tank body; and the air cleaning filter paper layers are equally spaced and parallelly arranged between the isolation plate and a hollow water delivery pipeline. The port of the hollow water delivery pipeline is connected with an air tank circulating pipe; one side of the air cleaning filter tank body is provided with the oil spraying cleaning filter tank body; and the water curtain oil filtering mechanism is arranged above the inside of the oil spraying cleaning filter tank body. According to the water circulation filtering device, water filter processing of air is realized through theair cleaning filter tank body, and water filter processing of oil mist is realized through the oil spraying cleaning filter tank body. The arrangement of the air cleaning filter tank body and the oilspraying cleaning filter tank body expands the application range of the water circulation filtering device, increases applicable objects of the water circulation filtering device, improves the use effect and equipment utilization rate of the water circulation filtering device, and can achieve the purposes of saving water sources and reducing cost.

The present invention provides a CO 2 Corrosion inhibitor and scale remover for oil flooding, preparation method and use method, composed of the following substances in weight percentage: benzoic acid thioureido imidazoline 17-21%, benzoic acid phosphate ester thioureido imidazoline 1-3%, Isopropanol 9‑13%, acetic acid 7‑11%, polyepoxysuccinate sodium 11‑15%, OP‑10 3‑7%, quinoline quaternary ammonium salt 12‑16%, polystyrene sulfonate sodium 3-7%, disodium edetate 5-9%, sodium diethylenetriaminepentaacetate 11-15%, N-dodecylmethylene bis-secondary ammonium salt 2-6%, the balance is water. To overcome the existing corrosion inhibitors and scale inhibitors usually have a single corrosion and anti-corrosion effect and scale inhibition effect, while effectively preventing the occurrence of scaling in oilfield water, it can also effectively inhibit corrosion, especially for The barium-strontium scale formed by the formation water with high barium-strontium ions has better scale removal effect.

The invention discloses an environment-friendly type boiler scale remover which is prepared from the following raw materials in percentage by weight: 10-50% of phytic acid, 5-10% of citric acid, 3-5% of glucose and the balance of water. The environment-friendly type boiler scale remover disclosed by the invention has the advantages of high efficiency, small application amount, low application cost, environmental friendliness, no pollution, small corrosion speed on equipment surface, and convenience in operation as equipment does not need to be hauled in descaling.

The invention discloses a scale-removing and anti-scaling alloy, which comprises the following raw material components in terms of mass percentage: 71%-75% of copper, 6%-10% of nickel, 0.5%-3% of tin, and 5%-15% of zinc , lead 6.5%~10%; The present invention also discloses the descaling device and preparation method that adopts said descaling and antiscaling alloy to make; Combining the above 5 elements to conduct electric The chemical action makes the electron transfer of various ions, separates and becomes a single molecular crystal, which exists independently in the water, plays the role of anti-scaling, has good effect of descaling, and the anti-scaling rate is as high as 97.37%, which improves the production efficiency and reduces the pollution emission is reduced, and the service life of the equipment is prolonged; on average, a heat exchange equipment installed with the scale inhibitor of the present invention will save gas costs (552965+238041) ÷ 2 = 395503 yuan in one year, and the catalyst of this alloy material The lifespan is very long, so it is more economical for continuous use.

The preparation of a kind of descaling and antiscaling agent used in the deashing water system provided by the present invention is prepared raw materials in parts by weight, consisting of 28-35 parts of itaconic acid-styrenesulfonic acid-acrylic acid copolymer, 27 parts of polyol phosphate -36 parts, 16-23 parts of glycolic acid, 19-25 parts of pure water; its best preparation: 30 parts of itaconic acid-styrenesulfonic acid-acrylic acid copolymer, 30 parts of polyol phosphate, 20 parts of glycolic acid, It is composed of 20 parts of pure water; when preparing, add pure water first, then put its components into the reaction kettle in turn, stir for 40-50 minutes, and control the temperature at 20-35°C to obtain the product; among them, itaconic acid-styrenesulfonic acid- For the synthesis of acrylic acid copolymer, take 10-14 parts of itaconic acid, 5-7 parts of styrenesulfonic acid, 3-5 parts of isopropanol, and 30-38 parts of pure water, put them into the reaction kettle in turn, stir, and heat to 95°C , dropwise add 22-25 parts of acrylic acid and 2 parts of ammonium persulfate solution (dilute with 18 parts of water first), control the dropwise addition within 30 minutes, keep warm for 110-122 minutes, drop to room temperature and discharge, pH value 1.5-2.5 , It can be obtained when it is light yellow transparent liquid. This product is used for descaling and antiscaling of ash removal water in power plants and reinjection water in oil fields, and the dosage is 5-10mg / L.

The invention belongs to the technical field of ships, and discloses a vacuum toilet dosing system. The vacuum toilet dosing system comprises a dosing barrel, a medicine conveying pipeline assembly, a dosing pump and a plurality of dosing hoses. The dosing barrel is used for containing liquid medicine; one end of the medicine conveying pipeline assembly is communicated with the dosing barrel, and the medicine conveying pipeline assembly is configured to convey the liquid medicine in the dosing barrel; the dosing pump is used for providing medicine conveying power for the medicine conveying pipeline assembly; one of the ends of the plurality of dosing hoses is communicated with the medicine conveying pipeline assembly, and the other one of the ends of the plurality of dosing hoses is communicated with a black water discharging system of a plurality of sanitary units respectively. According to the vacuum toilet dosing system, the large dosing barrel and the dosing pump are arranged, the dosing pump provides power for sucking the liquid medicine for the medicine conveying pipeline assembly, then the liquid medicine is guided and connected to flow into the black water discharging systems through the multiple dosing hoses, and the purpose of descaling is achieved. The centralized vacuum toilet dosing system is small in occupied space, convenient to arrange, convenient and fast to construct and convenient to maintain daily; the dosing barrel and the dosing pump do not need to be independently arranged for each sanitary unit, and the system is simple, practical and low in input cost.