52results about How to "Low degree of fragmentation" patented technology

The invention provides a new process for improving quality of black tea. The process comprises the steps of fresh leave selecting, sun drying, rocking, cooling, dehydration, rolling, fermenting, drying, aroma extracting and the like. The black tea product prepared by adopting the process is attractive in appearance and is sweet and mellow after being drunk, and the astringent taste is lightened. The process can effectively improve the appearance quality of the black tea (especially flowery Congou black tea); in the condition that aroma forming and water loss are out-of-step, a method of rocking and then low-temperature quick dehydration is adopted, so that the aroma of the tea leaves is kept, only partial moisture of the fresh leaves is removed, no fracture is caused during rolling, and therefore, development of subsequent process is benefited. The process can effectively promote the taste of the black tea, and after low-temperature quick dehydration, low-pressure long-time rolling is adopted, so that the crushing degree of leave cells is reduced, the crushing rate is not affected, and the taste of the product is remarkably improved. Meanwhile, dissolving of astringent substances in the tea leaves is reduced.

The invention relates to an extrusion type walnut shell crusher capable of adjusting extrusion distances. The extrusion type walnut shell crusher comprises a base, a fixed clamping plate and a first mobile clamping plate which are oppositely arranged on the base, and a driving mechanism used for driving the first mobile clamping plate. The extrusion type walnut shell crusher further comprises a distance limiting device, and the distance limiting device comprises a triggering mechanism and a fixed distance mechanism, wherein the triggering mechanism is used for triggering the fixed distance mechanism to work after the first mobile clamping plate is in contact with a walnut shell, and the fixed distance mechanism makes the first mobile clamping plate advance a preset fixed distance under control of the driving mechanism, so that the crushing degree of a walnut kernel is small after the walnut shell is crushed, the loss of the walnut kernel is reduced, and people eating walnuts become happier.

The invention discloses a massive four-stage moving bed carbonization furnace in a hydrogen-rich environment and a carbonization method thereof. The dry distillation furnace includes a drying preheating section, a sealing section, a dry distillation section, and a cooling section arranged sequentially from top to bottom. The upper part of the drying preheating section is provided with a feed port and the lower part is provided with an air inlet, and the upper part is far away from the air inlet end. There is an exhaust port, and the sealing section is connected to the upper drying and preheating section and the lower retort section through the star feeder installed inside. The oil and gas outlet, the cooling section is connected with the dry distillation section, the bottom of the cooling section is provided with a coke discharge port to connect with the coke discharge system and the lower part is provided with a cold gas inlet. The dry distillation method includes the steps of drying and preheating, sealing, dry distillation and cooling. The invention has the characteristics of low power consumption, high energy utilization rate, high oil production rate, good oil quality, less oil and gas dust, high gas calorific value and high resource utilization rate.

A threshed and re-dried tobacco leaf preprocessing technique based on tobacco leaf raw material characteristics comprises the process steps of vacuum dampening, primary hot-air leaf wetting and secondary hot-air leaf wetting and is characterized in that the adhesion and moisture of tobacco leaf raw materials are firstly analyzed and tested for classification before the process steps, and preprocessing process technique parameters of different categories of tobacco leaf raw materials are determined according to adhesion and moisture detection results of tobacco leaves. By adopting the technique, the moisture uniformity of different categories of tobacco leaf raw materials in a tobacco leaf threshing and re-drying preprocessing process is improved, caking phenomena of high-adhesion and high-moisture-content threshed and re-dried tobacco leaf raw materials in the threshing and re-drying preprocessing process are decreased, the breaking degrees of different categories of tobacco leaf raw materials in the threshing process are reduced, and the economic efficiency of threshing and re-drying processing is improved on the basis that the processing quality of threshing and re-drying is ensured.

A method for eliminating mottled defects on the surface of a hot-rolled steel plate, relating to a method for treating the surface of a steel plate, the method comprising the following process: heating the slab to 1200-1250°C, and then descaling with high-pressure water, and the descaling temperature is 1100°C ~1200°C, the water pressure is required to be at least 16MPa during descaling; the steel plate after descaling is subjected to rough rolling, and the rough rolling temperature is 1100~1200°C; the rough rolled steel plate is subjected to finish rolling, and the finishing rolling temperature is 900~990℃, the speed of the roller table is 1.3~1.8m / s; after finishing rolling, laminar flow cooling is adopted for water cooling, and segmental cooling is adopted, the water ratio is 2.2~2.6; the cooling water volume is 150~250m³ / h; the reddening temperature of the steel plate after cooling is 670~750°C; the water-cooled steel plate is cooled in the air on the cooling bed. The method makes it easy to remove the iron oxide scale on the surface of the steel plate in the subsequent shot blasting process, thereby eliminating the mottled defect on the surface of the steel plate after shot blasting.

The invention aims to solve the actual engineering construction problems that the explosive charging process is complex, time is consumed and labor is consumed, provides a non-coupling pre-splitting explosive charging device and a using method, and belongs to the technical field of surface blasting engineering. The device is composed of a variable-diameter non-coupling pre-splitting explosive charging barrel and an umbrella-shaped explosive charging device; and the umbrella-shaped explosive charging device is located on the upper portion of the variable-diameter non-coupling pre-splitting explosive charging barrel. According to the device, the length of the explosive charging barrel can be flexibly and fast changed according to the on-site hole depth changing length and the non-coupling coefficient, and the requirement that the explosive charging non-coupling coefficient is sequentially decreased from bottom to top in the whole explosive charging device is met; the device can enter blast holes of different diameters and is automatically opened according to the size of the blast holes, and explosives can be conveniently injected into an explosive charging vehicle; and blasting crushing regions and the blasting tight bottom can be reduced, and side walls are effectively protected.