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 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 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 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.