In-situ steam explosion method and device

Abstract

The invention relates to an in-situ steam explosion method, which is characterized in that the raw materials are subjected to explosion in a steam explosion reactor, then the escaped gas is fed into a gas condensation and recycling system and the remaining materials are kept in situ in the steam explosion reactor. The in-situ steam explosion device comprises a horizontal cylindrical tank; the upper wall of the tank is provided with a pressure gauge, a thermometer and a steam inlet, and the lower wall of the tank is provided with a steam outlet; two ball valves respectively arranged at the two sides of the tank are respectively used as a charging-car inlet and a charging-car outlet; and in the box-type or cage-type reticular charging car with wheels, a steel-mesh plate is arranged in front of a pneumatic ball valve of a steam outlet pipeline, the rear part of the steam outlet pipeline is connected with a buffer vessel and a gas condensation and recycling system, and the bottom of the inside of the buffer vessel is provided with an axial fixed orbit which facilitates the getting-in-and-out of the charging car. By using the device disclosed by the invention, the problems that the winding and knotting of fibrilia materials in the process of discharging, the difficulties and loss in raw material recycling, and the heat waste, environmental pollution, wasting of resources and troubles brought to experimental analysis which are caused by directly emitting the steam to the atmosphere and can not be solved by using the existing steam explosion technology and equipment are solved effectively.

Description

technical field [0001] The invention relates to a material pretreatment method and device thereof, in particular to a material in-situ steam explosion method and equipment. Background technique [0002] Steam explosion pretreatment is a pretreatment method developed in recent years. The raw material is heated to 180-235°C with steam, and the pressure is maintained for a certain period of time. When the sudden decompression is sprayed, the liquid water flashes rapidly, generating a large amount of steam, and the volume of the raw material tissue or cell increases sharply. Destruction; In addition, in the pressure maintenance process, there is also the self-catalysis of the raw material itself, and its main components are partially degraded. [0003] The steam explosion technology first started in 1926, when it was produced intermittently, mainly for the production of man-made fiberboard. Beginning in the 1970s, the technology has also been widely used in the production of a...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing steam explosion technology and equipment can not solve the entanglement and knotting of hemp fiber raw materials when they are discharged, the difficulty and loss of raw material recovery, and the heat caused by the high hygiene level requirements of some raw materials and the direct discharge of steam to the atmosphere. Waste, environmental pollution, waste of resources, and troubles to experimental analysis, etc., provide a set of in-situ steam explosion technology and equipment for raw materials, by preparing special-sized material trucks and setting wire mesh to intercept the steam outlet , at the moment of blasting, only the gas is allowed to escape, while the solid material remains in the feed car, which avoids the entanglement problem caused by the movement of raw materials, and can also reduce the loss of raw materials and improve the safety and sanitation factor. The gas enters the gas recovery system, which can be used for qualitative and quantitative analysis and also facilitates the secondary utilization of energy

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