4results about How to "Stable reaction temperature" patented technology

The invention discloses a teaching experiment device for dendrobium officinale flavone extraction and concentration, and the device comprises a separation column which is vertically fixed on the side surface of a supporting frame, and the separation column is internally provided with a reaction liquid; a plurality of groups of sampling wheels are vertically arranged on the side, away from the supporting frame, of the separation column, the axes of the sampling wheels are vertically arranged, a driving assembly is arranged on the axis sides of the sampling wheels, and sampling grooves are formed in the upper portions of the sampling wheels; according to the invention, the sampling wheels are vertically arranged on one side of the chromatographic column, and each sampling groove can accurately enter different depth areas of the chromatographic column, so that sampling is carried out in different time periods of the concentration process. According to the device, a closed concentration environment and an automatic sampling mechanism are adopted, the problem of potential safety hazards caused by frequent opening and closing of the device is avoided, meanwhile, the experiment operation difficulty is reduced, the device is particularly suitable for being used in teaching experiments, and the safety of students can be effectively protected.

The utility model belongs to the technical field of micro-channel reaction equipment, and particularly discloses a micro-channel reactor which comprises a cooling water pipe, a feeding pipe, a plurality of U-shaped pipes and a discharging pipe, the cooling water pipe is communicated with a plurality of water feeding pipes, each water feeding pipe is communicated with two water feeding branch pipes, the plurality of U-shaped pipes are sequentially communicated in an S shape, and the discharging pipe is communicated with the U-shaped pipes. Each water feeding branch pipe is communicated with the connecting position of the corresponding U-shaped pipe, each U-shaped pipe is composed of a jacketed pipe and an inner pipe, the jacketed pipes are connected to the inner pipes in a sleeved mode, the feeding pipe, the discharging pipe and the U-shaped pipes are all communicated with water return pipes, each water return pipe is provided with a water return thermometer and a water return valve, and the connecting position of each U-shaped pipe is provided with a water feeding thermometer. The micro-channel reactor can effectively improve the reaction uniformity, stabilize the pressure and improve the production safety, the design of the jacketed pipe can effectively reduce heat loss and maintain the heat balance of a reaction system, cooling water enters the multiple branch pipes synchronously, and the stability of the temperature and the pressure of the inner pipe can be maintained.

The invention relates to the technical field of ammonium nitrate production, and particularly provides an ammonium nitrate solution production method, which comprises: 1, sequentially passing a dilute nitric acid solution through a dechlorination tower, a bleaching tower and a nitric acid filter to obtain a finished product dilute nitric acid solution; 2, carrying out a neutralization reaction on ammonia gas and a dilute nitric acid solution; 3, the ammonium nitrate solution enters an evaporator to be concentrated, and alkaline steam is divided into two parts; step 4, condensing and recovering the part I, providing a heat source for the evaporator by the part II, and then mixing the part II with steam for separation; 5, after the steam and the ammonia gas are separated, the ammonia gas is recycled, and the steam enters an adsorption device after being condensed; step 6, the condensate is divided into desalted water and concentrated water by the adsorption device, and the concentrated water is introduced into the neutralization reactor as cooling water; 7, ammonium nitrate enters an intermediate tank after being concentrated, and a high-quality ammonium nitrate solution is obtained; the ammonium nitrate solution produced by the method is high in quality, stable in property and high in safety coefficient in the production, transportation and use processes.

This invention discloses a reactor for water-gas shift reaction and its application. The reactor is suitable for water-gas shift reaction processes containing gaseous and liquid reactants. A reaction chamber is set inside a hollow, sealed cylinder formed by the reactor walls. The reaction chamber is a hollow, sealed chamber surrounded by porous material as its wall surface. A gaseous reactant inlet pipe penetrates the reactor wall and extends into the upper part of the reaction chamber, a liquid reactant inlet pipe penetrates the reactor wall and extends into the cylinder, and a reaction product outlet pipe penetrates the reactor wall and extends into the lower part of the reaction chamber. The catalyst for the water-gas shift reaction is packed in the reaction chamber. The water-gas shift reaction can be carried out under near-isothermal conditions. Water in the liquid reactant does not need to be pre-vaporized and is directly fed into the reactor in liquid form, saving the energy consumption required to transport the corresponding amount of water vapor. Simultaneously, a high molar ratio of water to carbon monoxide is maintained within the reactor, promoting complete conversion of carbon monoxide.