34results about How to "Purification process is stable" patented technology

Provided are: an exhaust gas catalytic purging unit capable of long-term efficient purging of microparticle components such as hydrocarbons, carbon monoxide, nitrogen oxides and soot contained in exhaust gas from a lean-burn engine; a method for purging exhaust gas using such an exhaust gas catalytic purging unit; and a diesel automobile equipped with this exhaust gas catalytic purging unit. An exhaust gas catalytic purging unit is provided in which an oxidation catalyst (DOC) comprising noble metal components for oxidation of nitrogen oxides (NOx) contained in exhaust gas emitted from a diesel engine, a reducing agent spray means for feeding a reducing agent selected from a urea component or an ammonia component, and a selective reduction catalyst (SCR) for reduction by bringing nitrogen oxides (NOx) into contact with the reducing agent are disposed in this order from the upstream side of an exhaust gas stream, wherein the selective reduction catalyst (SCR) is zeolite or crystalline metal aluminophosphate that does not contain a noble metal component, and a trap means for collecting the noble metal component evaporated from the oxidation catalyst (DOC) is disposed between the oxidation catalyst (DOC) and the selective reduction catalyst (SCR).

The invention belongs to the technical field of water treatment, and particularly relates to a compound ecologic water treatment system operating in a low-temperature season. The compound ecologic water treatment system adopts a vertical undercurrent water distribution manner and a two-level series structure; each level is divided into three layers; each first layer is a 5-50 cm heat-insulating soil layer, and overyear plants are planted on the soil layer; each second layer is a 10-30 cm earthworm acting area filled with a filling material; each third layer is a 30-80 cm microbe filling material layer, and cryophile is adsorbed onto each filling material. In the compound ecologic water treatment system, the microbe amount and activity can be remarkably improved, and the wastewater treatment performance in low-temperature season is stable and favorable; besides, the compound ecologic water treatment system has the advantages of being low in constructing and running cost, simple and convenient to maintain and operate, high in recycling degree, simple in technological process, low in secondary pollution, and good in landscape greening effect.

The invention discloses a graphene quantum dot composite membrane for urban sewage purification treatment as well as a preparation method, and belongs to the technical field of sewage treatment membranes. The composite membrane comprises a base membrane and graphene oxide quantum dots deposited on the base membrane, the graphene oxide quantum dots are doped with silver, and the graphene oxide quantum dots are a nanosheet with diameter of 5-13 nm and thickness of 1-2 nm. The preparation method of the composite membrane comprises following steps: graphene oxide is prepared after oxidation of graphene and dispersed in a silver nitrate solution, silver ions in the silver nitrate solution are reduced by an electrochemistry method, the graphene oxide quantum dots are obtained, then the grapheneoxide quantum dots are deposited on the base membrane by electrodeposition to obtain the composite membrane. The prepared composite membrane has high water flux, high anti-fouling property, high antibacterial property and better stability, and can effectively purify water in the urban sewage purification treatment and avoid secondary pollution.

The invention discloses a device for preparing silver cyanide (AgCN) by recovering hydrogen cyanide (HCN) through electrodynamic migration. The device consists of an electric waste gas treatment device, a cathode electro-Fenton device and an HCN gas absorption device, wherein the electric waste gas treatment device consists of an anode chamber and a cathode chamber; the anode chamber and a cathode chamber is partitioned by an ion permselective membrane; voltages are respectively applied to both ends of the device; a waste gas is converted into a CN<-> form after entering the cathode chamber, and transmits an ion exchange membrane under the action of electromigration to enter the anode chamber; a high-concentration HCN gas is obtained in the anode chamber; the high-concentration HCN gas is collected in an HCN recovery storage tank; absorption liquid in an absorption liquid tank contains Ag<+>; and the Ag<+> reacts with HCN in an absorption tower. The device disclosed by the invention can be used for recovering HCN in various cyanogen-contained waste gases, such as a carbon fiber tail gas, an allyl cyanide gas, a calcium carbide furnace gas, a coke-oven gas, a yellow phosphorus tail gas and the like, and the HCN can be produced into an AgCN product.

The invention discloses a system for ecological purification of a water body on the basis of a nanometer coupling material. The system comprises an exogenous interception unit, an endogenous control unit, an artificial purification unit and an ecological restoration unit, wherein the exogenous intercepting unit comprises an ecological intercepting ditch and a slope protection ecological intercepting belt which are respectively positioned at two sides of a river channel; the ecological intercepting ditch comprises a plurality of intercepting ditches and intercepting pools communicating with theintercepting ditches; gravel and a water treatment slow-release agent are laid on the bottom walls of the intercepting ditches; porous ceramic particles are laid on the bottom walls of the intercepting pools; the slope protection ecological interception belt comprises a plurality of moisture absorption ecological bags which are stacked layer by layer along the slope surface and are mutually locked; a moisture absorption material fills each moisture absorption ecological bag; the artificial purification unit comprises an air supply device and an aeration device; the air supply device comprisesa fan and a pipeline; the aeration device comprises a membrane frame and hollow fiber membrane assemblies fixedly arranged on the membrane frame; the membrane frame is of a hollow structure; one endof the membrane frame is connected with the pipeline; and the membrane frame is used for conveying gas to the hollow fiber membrane assemblies. The system provided by the invention constructs a complete ecological chain to reinforce the self-purification capacity of river water and stabilize the effect of water purification.

The invention belongs to the technical field of water treatment, and particularly relates to a compound ecologic water treatment system operating in a low-temperature season. The compound ecologic water treatment system adopts a vertical undercurrent water distribution manner and a two-level series structure; each level is divided into three layers; each first layer is a 5-50 cm heat-insulating soil layer, and overyear plants are planted on the soil layer; each second layer is a 10-30 cm earthworm acting area filled with a filling material; each third layer is a 30-80 cm microbe filling material layer, and cryophile is adsorbed onto each filling material. In the compound ecologic water treatment system, the microbe amount and activity can be remarkably improved, and the wastewater treatment performance in low-temperature season is stable and favorable; besides, the compound ecologic water treatment system has the advantages of being low in constructing and running cost, simple and convenient to maintain and operate, high in recycling degree, simple in technological process, low in secondary pollution, and good in landscape greening effect.

The invention discloses a device for recovering hydrogen cyanide and preparing silver cyanide by electrodynamic migration. The device consists of an electric exhaust gas treatment device, a cathode electro-Fenton device, and an HCN gas absorption device. The electric exhaust gas treatment device is composed of an anode chamber and a cathode chamber, which are separated by an ion-selective permeable membrane, and a voltage is applied to both ends of the device. , the exhaust gas enters the cathode chamber and is converted into CN- form, and enters the anode chamber through the ion exchange membrane under the action of electromigration, and obtains high-concentration HCN gas in the anode chamber, which is collected by the HCN recovery storage tank, and the absorption liquid in the absorption liquid tank contains Ag+, react with HCN in the absorption tower to prepare the product AgCN. The device can recover HCN from various cyanide-containing waste gases (such as carbon fiber tail gas, acrylcyanide waste gas, calcium carbide furnace gas, coke oven gas, yellow phosphorus tail gas, etc.) and produce AgCN products.

The invention relates to the technical field of gas purification, and discloses an environmental protection device for removing smoke and odor, comprising a diversion pipe and a fan arranged at the gas outlet end of the diversion pipe, and a gas purification component is arranged inside the diversion pipe; the gas purification component includes The front purification part and the rear purification part connected by two connecting columns, the front purification part and the rear purification part are composed of the same mechanism, and the distance between the front purification part and the rear purification part is the length of the connection column. The purification part is adsorbed by activated carbon, and part of it moves from the lower end of the front purification part to the rear purification part. At this time, part of it is adsorbed by the activated carbon of the rear purification part. Finally, a small amount of polluted gas flows through the gap between the front purification part and the rear purification part. After being purified by multi-stage gas purification components, it can maximize the removal of smoke and odor from polluted gas, and the gas circulation is smooth, which can ensure the stability of gas purification after long-term use.

The invention discloses a device for absorbing and concentrating carbon dioxide containing exhaust gas. The device mainly consists of a carbon dioxide exhaust gas absorbing device and an EDI (Electronic Data Interchange) carbonic acid recovery device, wherein the EDI carbonic acid recovery device mainly consists of an anode chamber, a concentration chamber and a cathode chamber. The chambers are separated by ion exchange membranes. Carbon dioxide in exhaust gas is first reacted with an alkaline absorption liquid electrically generated in the carbon dioxide exhaust gas absorbing device to be converted into carbonate, and the absorbent is regenerated and pure carbonic acid is harvest in the EDI carbonic acid recovery device finally. The pure carbonic acid harvested can be directly used or used for extracting pure carbon dioxide. The device has the advantages of electric regeneration and circulation of the absorption liquid, capture of carbon dioxide, regeneration of the absorbent and extraction of carbon dioxide, easy operation, cost saving and the like. Carbon dioxide generated can be used as raw materials for producing chemical fertilizers and the like and manufacturing organic fuel such as methanol and the like.

The present invention relates to an air cleaner capable of stably cleaning the air in the entire room by properly controlling the airflow in a room under various installation environments. The air cleaner (1) is equipped with a casing (2), an air inlet (4), an air outlet (5), a fan unit (6), a deodorizing filter (10), a dust collection filter (11), a movable louver ( 12), drive unit (13), shaking head mechanism (14), internal detection device (15), external detection device (16), control device (18), etc. The wind direction of the air blown out from the air outlet (5) is changed between the front and the top and in the vertical direction by the movable louver (12), and is changed in the left and right direction by the oscillating mechanism (14). An external detection device (16) detects indoor information including at least a distance from a wall of a room. Moreover, the control device (18) controls at least one air supply parameter in the wind direction, air volume and wind speed of the blown air based on the detection result of the indoor information, so that the blown air is formed and returned to the air cleaner (1 ) recirculating airflow at the position.

The invention discloses a device and a method for electro-dynamic migration recovery and cyanogen-containing waste gas purification. The device consists of an electric waste gas treatment device and a cathode electro-Fenton device, wherein the electric waste gas treatment device consists of an anode chamber and a cathode chamber which are separated by an ionic selective permeable membrane, a voltage is applied to two ends of the device, the waste gas enters the cathode chamber and is converted into CN<->, the CN<-> penetrates an ion exchange membrane and enters the anode chamber under the action of electric migration, and high-concentration HCN gas is obtained in the anode chamber, collected by a HCN recovery storage tank and reused. The device can be used for recovering the HCN in various cyanogen-containing waste gases (such as carbon fiber tail gas, allyl cyanide tail gas, calcium carbide furnace gas, coke oven gas and yellow phosphorus tail gas).

The invention relates to an apparatus and a method of bubble column three-phase bio-reactor for purifying toluene waste gas. The apparatus comprises a bubble column three-phase bio-reactor, a buffer tank, a flowmeter, an air pump, an inorganic salt medium storage tank and a peristaltic pump constant-temperature electric heater; wherein the bubble column three-phase bio-reactor is a square column shaped shell. The side length of the square of cross section of the shell is 0.12-0.2m. An air distribution plate is arranged in the central position of the bottom of the shell. A detachable pysamid shaped seal is arranged at the upper part of the shell. A water outlet is arranged at a position adjacent to the bottom surface below the shell, and the internal diameter of the water outlet is 5 timesthat of immobilized thallus; wherein height-diameter ratio of the shell is 10:1-12:1. Toluene is purified by immobilized Pseudomonas putida WQ-03. A liquid phase is the inorganic salt medium, and the bubble column three-phase bio-reactor has no internal components, thus the rising resistance of air is small, the stay period is short, and the treating effect is good. Therefore, the research of using immobilized thallus to purify toluene waste gas in the bubble column three-phase bio-reactor has important actual application value.

The invention belongs to the technical field of air purification, and relates to paint having a formaldehyde removing function and a preparation method thereof. The paint specifically comprises, by weight, 1-3.4 parts of a formaldehyde removing agent, 3-13 parts of a base material, 0.05-0.1 part of an antifoaming agent, 0.05-0.1 part of a levelling agent and 0.01-0.05 part of a pH conditioning agent. The formaldehyde removing agent comprises, by weight, 1-13 parts of polyvinylpyrrolidone, 1-10 parts of water-soluble polymeric compounds, 4-42 parts of chiral amino alcohol, 1-7 parts of titaniumoxide, 1-7 parts of stannic oxide, 1-7 parts of silicon dioxide, 2-6 parts of magnesium oxide, 1-13 parts of active carbon, 1-9 parts of a soluble weak acid salt and 500-800 parts of a solvent. The formaldehyde can be removed quickly, stably and efficiently by the paint, raw materials are cheap and easily available, technology is simple and easy, and the paint and the preparation method are suitable for large-scale promotion and application.

The invention discloses an ecological water body purification system based on a nano-coupling material. The ecological water body purification system comprises an exogenous interception unit, an endogenous control unit, an artificial purification unit and an ecological restoration unit, wherein the exogenous intercepting unit comprises an ecological intercepting ditch and a slope protection ecological intercepting belt which are respectively positioned on two sides of a river channel; the ecological intercepting ditch comprises a plurality of intercepting ditches and intercepting pools communicating with the intercepting ditches, gravel and a water treatment slow-release agent are laid on the bottom walls of the intercepting ditches, and porous ceramic particles are laid on the bottom walls of the intercepting pools; the slope protection ecological interception belt comprises a plurality of moisture absorption ecological bags stacked layer by layer along a slope surface, and moisture absorption materials are contained in the moisture absorption ecological bags; the artificial purification unit comprises an air supply device and an aeration device; the air supply device comprises afan and a pipeline; and the aeration device comprises a membrane frame and a hollow fiber membrane assembly fixed on the membrane frame, the membrane frame is of a hollow structure, one end of the membrane frame is connected with a pipeline, and the membrane frame is used for conveying gas to the hollow fiber membrane assembly. According to the system, a complete ecological chain is constructed, river water self-purification capacity is enhanced, and water purification effect is stabilized.

The invention discloses a soluble metal salt recovery and wastewater purification device and a method thereof. The device comprises an anode chamber, a first fresh water tank, a concentrated water tank, a second fresh water tank and a cathode chamber. Each compartment is separated by ion selective permeation walls. Voltages are added at two ends of the device. Influent water first passes through the first fresh water tank, then passes through the second fresh water tank, and finally purified effluent water can be obtained. Under the effect of electromigration, negative and positive ions migrate towards the positive ion and negative ion selective permeation walls, and are adsorbed and then penetrate into the concentrated water tank, inside which the concentrated solution can be used for ion recovery. The device of the invention can be used for pure water preparation, seawater desalination, mineral matter extraction from underground mineral water, boiler water softening, and also can be used for industrial wastewater treatment as well as recovery of useful ions in wastewater.

The invention discloses a gas purification device, which comprises a shell and an activated carbon purification mechanism, wherein a gas inlet and a gas outlet are formed in the shell; the activated carbon purification mechanism is arranged in the shell and comprises an activated carbon layer and a temperature control assembly used for controlling the temperature of the activated carbon layer, andwhen gas to be treated flowing through the shell penetrates through the activated carbon layer to be subjected to adsorption purification treatment, the temperature control assembly controls the activated carbon layer to be at a first temperature, the first temperature is higher than the dew point temperature of the gas to be treated. According to the gas purification device disclosed by the invention, gas is adsorbed and purified by utilizing the activated carbon under the condition that the temperature is higher than the dew point, so that moisture-containing gas can be effectively prevented from being condensed when passing through the activated carbon layer, micropores of the activated carbon layer are prevented from being blocked by liquid generated by condensation, good adsorption activity and smoothness of the activated carbon layer are guaranteed, and the purification effect is guaranteed.

The invention discloses a surface decontamination system for moving and static contacts of a vacuum arc extinguish chamber, comprising a stretching cylinder, a stretching cylinder rod, a moving conducting rod, a lift cylinder, a lift cylinder rod, a fixed contact rod electrode sleeve, a first electrode terminal and a second electrode terminal, wherein the stretching cylinder is connected with the stretching cylinder rod, the stretching cylinder is operated to drive the stretching cylinder rod to vertically lift, the upper end of the stretching cylinder rod is connected with the moving conducting rod; the lift cylinder is connected with the lower end of the lift cylinder rod and drives the lift cylinder rod to vertically lift, the lift cylinder rod is connected with the fixed contact rod electrode sleeve and drives the fixed contact rod electrode sleeve to move up and down; and one pole of a direct current arc welder power supply is connected with the first electrode terminal, the other pole is connected with the second electrode terminal, the first electrode terminal is connected with the moving conducting rod, and the second electrode terminal is connected with the fixed contact rod electrode sleeve. The invention realizes the advantages of high decontamination efficiency, uniform decontamination of surface ablation of the moving and static contacts of a vacuum switching tube and good consistency.

The invention provides a purifying and impurity-removing method of a leaching solution containing vanadium, which comprises the following steps: leaching a material containing vanadium to obtain the leaching solution containing vanadium; according to the phosphorus content and the silicon content in the leaching solution containing vanadium, respectively determining the addition of magnesium sulfate and the addition of alum; heating the leaching solution containing vanadium to a certain temperature; first adding part of the alum while stirring the leaching solution containing vanadium; after a first period of time, adding the magnesium sulfate to the mixture; after a second period of time, adding the residual alum to the mixture; after reaction for a period of time, standing and precipitating the mixture; and after precipitating the mixture after reaction for a period of time, delivering the clear solution to a subsequent process of precipitation, and delivering the bottom flow to a plate frame for pressing filtration. The method can effectively control the content of silicon and phosphorus in the solution containing vanadium to below relatively low values, reduces the loss of vanadium and greatly increases the purifying yield.