37results about How to "Improve dust accumulation" patented technology

A controlled-release fertilizer comprising fertilizer particles encapsulated in a biodegradable polyurethane obtained from a reaction between a polyisocyanate and an isocyanate-reactive component, which is formed by a polyol and a methyl ester derivative of a natural oil, in the presence of an amine catalyst.

The invention discloses an elliptical tube H-shaped fin heat exchanger for waste heat recovery. The elliptical tube H-shaped fin heat exchanger comprises an elliptical heat exchange tube, a plurality of groups of H-shaped fins and a heat exchanger surface, wherein the H-shaped fins are sleeved on the surface of the heat exchange tube; the heat exchanger surface consists of non-uniform triangular small wings, which are elliptically arranged, on the surfaces of the H-shaped fins around the elliptical heat exchange tube. When dusty flue gas flows through the surfaces of the H-shaped fins, the small wings disturb the fluid to enhance the heat exchange on the tube wall and the downstream side, and meanwhile, the deposition of particles on the tube wall is reduced; the pressure drop can be reduced by the elliptical tube while the particle adhesion is reduced. A plurality of longitudinal vortexes are arranged in a non-uniform manner; at the front and rear edges of the wing, the size of the small wings and the windward attack angle are larger; on the middle parts of the H-shaped fins, the size of the small wings and the attack angle are smaller; by using the device, the heat exchange surface in different flow states can be enhanced respectively, the heat exchange of the fins are effectively enhanced, the pressure drop is reduced, and the deposition of dust particles in the flue gas on the heat exchange surface is reduced, so that the heat exchanger can operate efficiently for a long time in the dusty flue gas.

The invention discloses a biomass granular fuel. The fuel comprises a biomass raw material and an additive, wherein the additive is a mixture of chitosan, calcium oxide and urea, and a weight of the additive is 0.5-4.8% of a weight of the biomass raw material. According to the fuel disclosed by the invention, a certain amount of chitosan, calcium oxide and urea are added into the biomass raw material as the additive, so that alkali metal elements in the biomass granular fuel can be fixed, and the problems of dust accumulation and slagging caused by alkali metals contained in the biomass granular fuel can be effectively improved; and addition of the chitosan, the calcium oxide and the urea can increase a contact area of the biomass granular fuel and oxygen, make a combustion reaction more sufficient, and prolong burning time, thereby improving burning efficiency. The invention also provides a preparation method of the biomass granular fuel.

The invention relates to the technical field of computer input devices, and discloses a keyboard that is convenient for cleaning and intelligently adjusts the pressing force, including a casing, the bottom of the casing is fixedly connected with a keyboard wire, and the right end of the bottom of the casing is passed through a return spring A support is elastically connected, the left end of the support is rotatably connected with a pulley, the bottom of the housing is rotatably connected with a screw, and the external movement of the screw is connected with a clamp block, and the end of the clamp block away from the keyboard cable is elastically connected There is a spring one, and the left end of the housing is rotatably connected with a turntable. The keyboard, which is easy to clean and intelligently adjusts the pressing force, adjusts the key pressure according to the needs of the user, enhances the user experience, adjusts the extension length of the keyboard line according to the actual use environment, facilitates the adjustment of the length of the keyboard line, and prevents the keyboard line from being too long. Winding, easy to clean the bottom groove of the keyboard, avoiding the waste of time caused by dismantling all the keys.

The invention relates to a gasification method of a carbon-containing solid raw material and a used reactor. The gasification method is characterized by comprising the following steps of: reacting the carbon-containing solid raw material with oxygen in a reactor unit so as to generate synthesis gas, wherein ash flows downwards into a slag pool at the lower end of a gasification reactor in the slag form under the action of gravity force; allowing high-temperature synthesis gas which entrains molten ash residues to rise to a chill zone in the gasification reactor, injecting steam or / and water into the chill zone by using chilling equipment and chilling the high-temperature synthesis gas so as to freeze the molten ash residues entrained in the high-temperature synthesis gas into solid dust; introducing the synthesis gas which entrains the chilled solid dust into a dust removing unit so as to remove dust entrained in the synthesis gas; and introducing the synthesis gas into a waste boiler unit and generating steam by using process waste heat of the synthesis gas. The reactor provided by the invention isolates a gasification furnace from the waste boiler unit through respective shell and the dust removing unit is arranged between the gasification furnace and the waste boiler unit. The equipment has low wear rate and can run for a long time.

The invention belongs to the relative technical field of domestic waste incineration and pollutant control, and discloses a pollutant removal structure suitable for domestic-waste-pyrolyzed gasification gas and a combustion device. The pollutant removal structure comprises a furnace body, and a chamber is formed in the furnace body. A support plate is arranged in the chamber, the chamber is divided into an upper chamber and a lower chamber by the support plate, and the upper chamber communicates with the lower chamber. The pollutant removal structure further comprises a calcium-based ejector and a primary air pipe, wherein the primary air pipe is arranged on the furnace body and communicates with the lower chamber; the calcium-based ejector is adjacent to the primary air pipe and is used for ejecting calcium-based materials into the primary air pipe; and the primary air pipe is used for enabling the domestic-waste-pyrolyzed gasification gas and primary air to enter the lower chamber and to be desulfurized and dechlorinated at above 850 DEG C. The pollutant removal structure reduces dioxin emission, solves the problems of contamination and dust stratification, and has the advantagesof simple structure and high flexibility.

The invention relates to an ironing worktable, in particular to an ironing worktable for an electric iron and aims to provide an ironing worktable capable of fixing clothes, facilitating placement of an electric iron and used for the for electric iron. For solving the technical problem, the ironing worktable for the electric iron comprises a worktable body and the like. A fixing mechanism is symmetrically arranged on the worktable body, and a placement mechanism is connected to the right side of the worktable body. The fixing mechanism is arranged on the worktable body and can fix clothes, a worker can conveniently iron the clothes, and the ironing worktable is provided with the placement mechanism so that the electric iron can be placed well.

The invention discloses a liquid decoking agent, which belongs to the technical field of clean coal combustion. The main active ingredients are organic surfactants and nitrates. Organic surfactants under high temperature conditions, on the one hand, the organic polymer compounds have a decontamination effect; on the other hand, the organic polymer compounds react under high temperature conditions to produce a large number of bubbles, which will promote the loosening of the coke. On the one hand, nitrate can “micro-explode” at high temperature and release oxygen, which can ensure continuous release of oxygen from low temperature to high temperature, promote the loosening of ash and carbon deposits in different parts, and help pulverized coal to burn more efficiently. On the other hand, metal ions in nitrate can promote the conversion of low-melting-point compounds in the coke layer into loose high-melting-point compounds, which can not only help to remove the coke layer, but also prevent high-temperature corrosion.

The present invention belongs to the field of thermal equipment technology, and is especially coal burning hot blast stove. The coal burning hot blast stove has one casing, one blower in the upper part of the casing, one burning energy changer comprising burning hearth and heat exchanger in the middle part, one transverse flue connected between the burning energy changer and the chimney and with soot door, vertical cooling fins outside the burning energy changer and the flue, one hot blast cavity formed between the casing and the burning energy changer and the flue, one coal feeding port and one cleanout door below the burning energy changer. The burning energy changer is heated by flame under it, and the heat in the burning energy changer and the flue are carried out by the air from the blower. The coal burning hot blast stove has convenient soot and slag elimination and high heat efficiency.

The invention relates to a method for determining the inlet parameter of an SCR denitration device. According to the method, a boiler furnace, a horizontal flue and a tail portion flue are used as calculating objects, numerical simulation of the total-system combustion, heat transfer and flowing process is conducted by the aid of Fluent software, the flue gas parameters of an economizer outlet, namely an inlet of the SCR denitration device under different working conditions are obtained, and the flue gas parameters relate to velocity distribution, temperature distribution and smoke component concentration distribution; according to the whole system from the boiler furnace, the horizontal flue and the tail portion flue (to the economizer outlet), numerical simulation of the combustion, heat transfer and flowing process is conducted, movement of solid-phase particles is also taken into account, the solid-phase particle parameters of the economizer outlet, namely the inlet of the SCR denitration device under different working conditions are obtained, the problems that the design calculation and engineering actual deviation of the SCR denitration device is too big due to the fact that the inlet flue gas parameter cannot be reasonably set traditionally, and catalyst abrasion and dust accumulation can be caused for giving too little care to the movement of solid-phase particles are solved, hence, the denitration efficiency of an SCR reactor can be effectively improved, and the service life of catalysts is prolonged.