手表（IT-521）

手表（IT-1811）

手表（IT-519）

4A molecular sieve adsorbent and preparation method thereof

The invention relates to the field of molecular sieve preparation, and discloses a preparation method of a 4A molecular sieve adsorbent and a 4A molecular sieve prepared by the preparation method. The method comprises the following steps: 1) roasting 4A molecular sieve matrix pellets; the method comprises the following steps: (1) roasting 4A molecular sieve matrix pellets, (2) carrying out pre-wetting treatment on the roasted 4A molecular sieve matrix pellets obtained in the step (1), and (3) carrying out hydrothermal crystallization treatment on the pre-wetted 4A molecular sieve matrix pellets obtained in the step (2) and an alkaline aqueous solution, the roasting condition is that the roasting temperature is 550 DEG C or above, and the hydrothermal crystallization condition in the step 3) is that the hydrothermal crystallization temperature is 85 DEG C or above. The adsorbent prepared by the preparation method of the 4A molecular sieve adsorbent provided by the invention has the advantages ...

Tracing method and management platform

The invention discloses a source tracing method and a management platform, and belongs to the technical field. According to the user two-dimensional code, an APP is adopted to scan the user two-dimensional code, and an activity track of the user within a certain time is generated; according to the activity track of the user, analyzing the activity track of the user to generate an activity track-analysis list; the system generates early warning for users passing through the risky area, and issues early warning notices to personnel having common intersections with the users. In order to solve the problems that the traceability workload is increased, the traceability progress is slowed down and the traceability efficiency is reduced because users passing through a risk area cannot be found out timely and quickly, the traceability method and the management platform can reduce the traceability workload, accelerate the traceability progress and improve the traceability efficiency.

Filter cloth type selection method for molecular sieve pulp liquid filter pressing

The invention relates to the technical field of solid-liquid separation of molecular sieve slurry, and discloses a filter cloth type selection method for filter pressing of molecular sieve slurry and a filter pressing method of the molecular sieve slurry. The method comprises the following steps: (1) detecting the pH value of molecular sieve slurry, and selecting a filter cloth material according to the following standards: when the pH is less than or equal to 3, selecting a polyester material, when the pH is more than 3 and less than or equal to 5, selecting a polyester or polypropylene fiber material, when the pH is more than 5 and less than or equal to 10, selecting a polyester, polypropylene fiber, chinlon or vinylon material, when the pH is more than 10 and less than or equal to 12, selecting a polypropylene fiber, chinlon or vinylon material, and when the pH is more than 12, selecting a polypropylene fiber or vinylon material; and (2) determining the volume average particle size Dm ...

Intelligent electronic class board teaching application system

The invention relates to the technical field of intelligent class boards, and discloses an intelligent electronic class board teaching application system, which comprises a class recording unit, a learning analysis unit, an attendance checking unit, a class board unit, a communication unit and a query unit, and is used for recording and uploading basic daily life such as student attendance checking and daily examination, so that parents and teachers can conveniently query, and the teaching efficiency is improved. In order to enable parents to conveniently and intuitively see whether students are late or leave early at school and the completion degree of daily assessment, daily test results and attendance are analyzed and graded, errors generated by daily assessment are fed back, teachers and parents can further conveniently know recent situations of the students, and the students can conveniently and rapidly know the recent situations of the students. According to the electronic class board ...

Multistage sliding surface retaining wall reinforcing structure and design method thereof

The invention discloses a multistage sliding surface retaining wall reinforcing structure and a design method thereof.The retaining wall reinforcing structure comprises a new anti-sliding retaining wall, and the new anti-sliding retaining wall comprises a thickened wall body covering the side face, away from a sliding body, of an old anti-sliding retaining wall; a heightened wall with the width larger than the sum of the width of the thickened wall and the old anti-sliding retaining wall covers the top face of the thickened wall and the top face of the old anti-sliding retaining wall, and an embedded body which extends downwards and is attached to the side face, making contact with the sliding body, of the old anti-sliding retaining wall is arranged on the heightened wall. And the drain holes in the thickened wall body and the heightened wall body are communicated with the drain holes of the old anti-slip retaining wall.

Complexing agent recovery device and catalyst impregnation system

The invention provides a complexing agent recovery device and a catalyst impregnation system. The complexing agent recovery device comprises a roasting furnace, a separation device, a buffer device, an absorption device and a complexing liquid storage tank, a feeding hole of the roasting furnace is used for introducing a catalyst material impregnated by using a complexing method, and the roasting furnace is used for roasting the introduced catalyst material containing a complexing agent to generate roasting tail gas; a gas inlet of the separation device communicates with a gas outlet of the roasting furnace and is used for introducing roasting tail gas, and the separation device is used for dedusting the roasting tail gas; a gas inlet of the buffer device is communicated with a gas outlet of the separation device, and the buffer device is used for removing solid particles in the roasting tail gas; a gas inlet of the absorption device is communicated with a gas outlet of the buffer device ...

Pretreatment method of 4A molecular sieve adsorbent and 4A molecular sieve adsorbent

The invention relates to the field of molecular sieve preparation, in particular to a pretreatment method of a 4A molecular sieve adsorbent and the 4A molecular sieve adsorbent prepared by the pretreatment method. The method comprises the following steps: 1) roasting 4A molecular sieve matrix pellets; 2) pre-wetting the 4A molecular sieve matrix pellets subjected to roasting treatment in the step 1), the 4A molecular sieve matrix pellets contain a binder, the binder is kaolin, and in the step 1), the roasting condition is that the roasting temperature is 550 DEG C or above, and in the step 2), the pre-wetting treatment is performed by adopting the vortex vibration water mist spraying method. By means of the technical scheme, the compressive strength of the prepared 4A molecular sieve adsorbent can be greatly improved, and meanwhile the adsorption capacity of the 4A molecular sieve adsorbent is improved.

Preparation method of anti-rut agent raw material and preparation method of anti-rut agent

The invention relates to the field of molecular sieve preparation, and discloses a preparation method of an anti-rut agent raw material, a preparation method of an anti-rut agent and a preparation method of an asphalt mixture. The preparation method of the anti-rut agent raw material comprises the following steps: 1) drying recycled molecular sieve fine powder, and fully grinding to be more than 200 meshes; (2) drying the fine powder obtained in the step (1) at 150-260 DEG C for 0.5-1 hour; (3) dipping the fine powder obtained in the step (2) in 0.3-2wt% of sodium hydroxide solution, stirring and heating for 1-2 hours; 4) drying the fine powder obtained in the step 3) at 100-160 DEG C for 2-5 hours; and 5) mixing the fine powder obtained in the step 4) with a silane coupling agent to obtain the anti-rut agent raw material fine powder. According to the method disclosed by the invention, waste fine powder generated in a molecular sieve production process is treated by a physical and chemical ...