55results about How to "Close the loop" patented technology

The invention discloses a method for achieving filter liquor circulation, recovering waste lead plaster through a wet process and preparing high-purity red lead and relates to the technical field of waste lead-acid cell lead plaster wet process recovery and red lead preparation. The method comprises the following steps that 1, organic acid salt, organic acid and reducer mixed liquor are utilized for leaching out the waste lead plaster, and after solid and liquid are separated, lixivium is obtained; 2, a carbonate solution is added to the lixivium, the reaction pH is regulated, and solid and liquid separating is carried out to obtain lead carbonate sediment and filter liquor; and 3, lead carbonate is roasted in the aerobic atmosphere, and the high-purity red lead with low impurity content is prepared. The prepared red lead product is high in purity and low in impurity content, the content of main impurities Ba and Fe is smaller than 10 mg / kg, the content of Cu, Zn and Al impurity elements is smaller than 1 mg / kg, the filter liquor can achieve closed circulation of organic acid radical ligand in a leaching system, and the use efficiency of a leaching agent is improved remarkably.

The invention discloses an activated carbon continuous sorption-desorption device for a movable bed. The device comprises an adsorber filled with granular active carbon, wherein an aggregate bin is in communication with the adsorber through an upright material sealing pipe, and continuously and slowly provides the granular active carbon into the adsorber; a regenerator is arranged below the adsorber by communicating with the adsorber through a first star-type material feeder; the granular activated carbon at the bottom of the adsorber continuously and slowly flows into the regenerator; the regenerator is in communication with a lifting pipe dryer by a second star-type material feeder; a first cyclone separator placed at the upper part of the aggregate bin is arranged at the upper end of the lifting pipe dryer; the granular activated carbon at the bottom of the regenerator is lifted by the lifting pipe dryer so as to continuously flow into the aggregate bin via the first cyclone separator; a waste gas inlet pipe and a waste gas outlet pipe are arranged on the adsorber; and a steam inlet pipe and a steam outlet pipe are mounted on the regenerator. By using the activated carbon continuous sorption-desorption device disclosed by the invention, the sorption-desorption process can be continuously carried out, thereby improving the sorption-desorption efficiency.

The invention relates to a device for efficient and clean treatment of coal washing water without chemicals, comprising a pretreatment tank, a clarification tank, a coarse filter, an ultrafilter, a sedimentation tank and a coal slime dehydrator; a baffle is arranged in the middle of the pretreatment tank, The coal washing water inlet pipe is arranged above the pool wall of the pretreatment tank, and the aeration inlet pipe is connected to the coal washing water inlet pipe along the vertical direction; the floating substance overflow pipe is arranged on the top of the pool wall of the pretreatment tank; Inclined tube sedimentation tank. The main feature of this invention is that it adopts a brand-new water treatment concept, and after carefully analyzing the characteristics of coal washing water, it proposes a chemical-free and efficient clean treatment process. The water treatment speed is dozens of times that of the traditional process, and the occupied area is less than 50% of the traditional process. It is especially suitable for the purification treatment equipment of coal washing water and mine water. Using the device of the present invention to treat coal washing water does not require adding any chemicals, which will inevitably help enterprises reduce operating costs, help enterprises meet environmental protection requirements, and truly realize zero sewage discharge.

The invention discloses a wastewater treatment method in an electrolysis process of p-aminophenol. In the method, the p-aminophenol is removed by adsorption of fruit shell activated carbon, and then the waste water is evaporated and concentrated to recover industrial-grade ammonium sulfate, and the recovery rate of the ammonium sulfate is greater than 98%. The evaporated water is used to prepare 18% sulfuric acid aqueous solution and enters the electrolytic cell as electrolyte to realize the closed circulation of water. The fruit shell activated carbon that adsorbs p-aminophenol can use 18 (wt)% sulfuric acid aqueous solution as a desorption agent to regenerate the activated carbon (the unit consumption of activated carbon is about 50 kg / ton PAP), and the desorption solution can be returned to the electrolytic cell to participate in electrolysis reaction, therefore, the waste water treatment method of the present invention is a zero discharge, environmentally friendly waste water treatment method.

The invention relates to a treatment method for sebacic acid production wastewater and a special extraction device thereof. The method includes solid and liquid separation in settling tanks, neutralization method Ph value adjustment, extractant extraction of forbidden substances, and separation of forbidden substances and discharge water. The key idea is to use ricinoleic acid as the extraction agent to extract and Separation of prohibited discharge phenol in sebacic acid production wastewater, and the specific steps of mixing and reusing the extractant and extract were adopted. With the help of the supporting special extraction device, the multi-stage extraction operation of forbidden substances is carried out to realize the closed circulation of forbidden substances in the production system. The extraction device is composed of extraction and separation tanks arranged in sequence, a mixing emulsification pump arranged between two adjacent or interphase extraction and separation tanks, and a pipeline connected between the mixing emulsification pump and the extraction and separation tanks on both sides. The oil inlet of a matching mixed emulsification pump is connected with the oil phase outlet of the subsequent stage extraction and separation tank, the water inlet is connected with the water phase outlet of the front stage extraction and separation tank, and the outlet of the mixed emulsion is connected with the steady state of the previous stage extraction and separation tank. The rehydration port drawn from the flow chamber is connected.

The invention discloses a self-recovery system for a cooling energy medium of a heating furnace. The system is mainly designed by aiming at the situation that the cooling energy medium is not fully utilized by an existing heating furnace cooling system. According to the self-recovery system for the cooling energy medium of the heating furnace, a first outlet distribution header is connected to an outlet of an in-furnace water beam and is connected with a second outlet distribution header through a pipeline group; a generator set is arranged on the pipeline group; a vapor water mixture in the first outlet distribution header is conveyed to the pipeline group; the vapor water mixture in the pipeline group supplies energy required by the operation of the generator set and is output to the second outlet distribution header through the generator set. According to the self-recovery system for the cooling energy medium of the heating furnace, the vapor water mixture formed by vaporizing saturated water through the in-furnace water beam is converted into the saturated water through the generator set, the saturated water is recycled, and electric energy generated by the generator set can be used for the self-operation of the system.