53results about How to "Reduce dehydration energy consumption" patented technology

The invention provides a process for synthesis of triisopropanolamine by using liquid ammonia and trimethylene oxide as raw material, water as catalyst, stock preparing by the mol ratio of liquid ammonia : trimethylene oxide = 1 : 3.00 - 3.05, charging deionized water in one time, charging liquid ammonia and trimethylene oxide in two times, fully stirring, sustaining the pressure <0.5 MPa, sustaining reaction temperature between 20-75 deg. C for 1.0-3.0 hours, decompressing for dehydration till the water content is less than 5%.

The invention discloses a dehydration method of huge-body high-water-content and low-permeability waste residue, and belongs to the field of utilization of industrial waste residue. The dehydration method is characterized by comprising the steps that a percolation type drain channel is planted into the fluid or plastic fluid waste residue, and an airtight thin film is adopted to cover the surfaceof the system to form an airtight system; the airtight system is vacuumized through a water drain pipe, the water in the waste residue is pumped through the percolation type drain channel, and the waste residue is dehydrated to be flexible plastic waste residue with the certain independence degree; on the basis, the percolation type drain channel is horizontally arranged to be drain channel sets,the waste residue and the drain channel sets are alternately stacked to reach the designed stacking height, the water in the waste residue is further extruded out through the percolation type drain channel under the driving of the gravity on the waste residue; and the dehydration of the waste residue is finally achieved. The dehydration method has the advantages that the huge-body waste residue can be dehydrated economically and effectively, ad the construction land occupation is less.

The invention relates to a sludge substance deep dehydrating method based on thermal conditioning coupling filter pressing, belongs to the field of sludge treatment, is suitable for dehydration of various kinds of sludge, and particularly suitable for dehydration of surplus sludge. The method comprises the following steps: firstly carrying out heat exchange to a high temperature filtrate and the sludge, injecting the sludge with the raised temperature in a thermal conditioning processing unit, and performing a sufficient hydrothermal reaction at 120-250 DEG C; then immediately performing filter processing and dehydrating under the pressure to remove the moisture in a liquid state; at last, decompressing the high temperature sludge filter cake with pressure, further steaming and dehydrating with the sludge own high temperature and heat, so as to improve the dehydrating efficiency. The dehydrating method can improve sludge structure, physicochemical property and moisture distribution, save and fully utilize the heat, realize high-dryness and low-energy consumption dehydration of sludge, and improve the recycling value of the sludge.

An experimental system and method for vibration grading, drying and quality improving of low-rank coal belong to drying and quality improving systems and methods of the low-rank coal. The system is formed by a vibration grading barrel, a grading barrel support, a multi-screening-face mechanism, a grading barrel exciter, a hot smoke input pipeline at the upper portion of a barrel body, a discharging port in the lower portion of the barrel body and a hot smoke replenishing pipeline outside the barrel body, wherein the multi-screening-face mechanism is arranged inside the barrel body. Raw low-rank coal is added into vibration grading drying barrels from the upper portion, pre-grading is carried out by the grading drying barrels under the effect of the exciter, the calibers of screening faces are reduced from top to bottom, the pre-graded low-rank coal forms material layers on the screening faces with different calibers, high temperature hot smoke enters the drying barrels from the upper portion of the barrel body and is in contact with particles of the largest fraction, a coal sample in a vibrating screen is dried, and a screening barrel continuously vibrates to keep the materials loose. The temperature is reduced after the hot smoke passes through the screening face, the hot smoke enters the lower layer of the screening barrel to dry the particles of the next fraction and so on. Finally, the particles of the smallest fraction are discharged into a tail gas separating device along with cooled smoke tail gas.