7results about "Purification using alkaline earth metal compounds" patented technology

The invention discloses a method for realizing circulating clarification utilization of sugar industry filter mud based on calcination, which comprises the following steps: filter mud drying: scattering and drying wet filter mud to obtain dry filter mud; suspension flash burning: mixing the dry filter mud with limestone powder, calcining by utilizing secondary hot air in a suspension cooling process, removing organic matters in the dry filter mud and partially decomposing calcium carbonate in the mixed material; performing fluidized bed roasting: introducing high-pressure air into the mixed material subjected to suspension flash burning treatment to enable the material to utilize waste heat of the material in a boiling state to complete deep decomposition of calcium carbonate so as to obtain a high-temperature finished product; suspension cooling: cooling the high-temperature finished product to obtain a low-temperature finished product; digesting: digesting a low-temperature finished product to prepare lime milk; and flue gas reutilization: the CO2-containing flue gas generated by suspension flash burning is sequentially used as a drying heat source for filter mud drying, and is used for a sugar juice clarification and carbonation process after being purified. According to the invention, the pollution problem is solved, resource utilization is realized, the use of limestone is reduced, the flue gas heat of the system is fully utilized, and the energy consumption is reduced.

The invention discloses a system and process for treating sugar industry filter mud through suspension calcination, the system comprises a suspension flash burning furnace, a first-stage separator, a fluidized bed furnace, a scattering dryer, a second-stage separator, a suspension cooling system and a digestion system, and the suspension cooling system comprises a first-stage cooling unit and a last-stage cooling unit; cooling air is introduced into the final-stage cooling unit, and an air outlet of the final-stage cooling unit is connected with a secondary air inlet of the suspension flash burning furnace through the first-stage cooling unit; according to the flow direction of gas, the gas outlet of the suspended flash burning furnace is connected with the sugar juice clarifying system through the primary separator, the scattering dryer, the secondary separator and the dust collector in sequence; a discharging pipe of the second-stage separator is connected with a material feeding opening of the suspension flash burning furnace, a discharging pipe of the first-stage separator is connected with a feeding opening of the fluidized bed furnace, a furnace gas outlet of the fluidized bed furnace is connected with the first-stage cooling unit, and a discharging opening of the first-stage cooling unit is connected with the sugar juice clarifying system through the final-stage cooling unit and the digestion system. The problem of pollution caused by filter mud stacking and landfill is solved, resource utilization is achieved, and energy consumption of the system is reduced.

The present invention relates to a method for producing a carbonation product from a carbonation reactant and to a device for producing a carbonation product from a carbonation reactant, in particular suitable and designed for carrying out the method according to the invention.

The utility model relates to the technical field of pre-ash technology for sugar refining production, and discloses a pre-ash device for sugar refining production, which comprises a pre-ash pool, four partitions are fixedly installed in the interior of the pre-ash pool, and the interior of the pre-ash pool is evenly divided into five areas by the four partitions. The four partitions evenly divide the pre-ash pool into five areas, and an independent driving motor, a rotating shaft and a stirring fan blade system are arranged in the four areas on the left side, so that the mixing uniformity of lime milk and raw sugar syrup is improved, the pre-ash reaction time is shortened, the part of pigments and impurities in the syrup can be adsorbed after adding lime, the cleaning efficiency is improved, the lime milk feeding pipe is connected with a double first electric regulating valve and a first flowmeter to realize independent flow regulation and control of the first area and the fourth area, the rightmost area is monitored in real time by a PH automatic measuring instrument, the lime milk feeding amount can be dynamically adjusted, the pre-ash end point pH value reaches the standard, the PH value of the raw sugar solution is controlled, the sucrose conversion is effectively reduced, and the cleaning efficiency is improved.

The invention relates to the provision of a method for producing a clear sugar beet pre-liming juice and for producing a coagulate removed from the pre-liming juice, and to pre-limiting juice and a fraction containing protein that are provided by means of said method. A decanter centrifuge having an angle between the longitudinal axis of the bowl and the generatrix of the conical portion of 6-10° is used.