Methods and a slaker for removal of heavy grit during batchwise slaking of burnt lime in a slaker ( 2 ) for the production of lime slurry with a high degree of fineness and prolonged sedimentation time are described, where the following processing steps are carried out during the slaking process: a)—reduction of the stirring of the slaker ( 2 ) from a normal stirring speed to a lower stirring speed, b)—opening of an upper inlet valve ( 60 ) in a collector ( 70 ) mounted in the lower part ( 54 ) of the slaker ( 2 ) to lead sinking grit in the slurry batch to the collector ( 70 ), whereupon the upper inlet valve ( 60 ) is closed after a given time period, c)—increase the stirring in the slaker ( 2 ) back to the normal stirring speed, d)—after a given time period with normal stirring speed, a regulating valve ( 22 ) in the lower part ( 54 ) of the slaker ( 2 ) is opened for emptying of a batch of slurry to an external storage tank ( 3 ), and e)—when said regulating valve ( 22 ) is opened for emptying of a batch of slurry, a lower outlet valve ( 62 ) in the collector is optionally opened for emptying of collected grit.

Method for removal of grit in a slaker equipped with a grit collector

The invention discloses a thermal power plant water affair center. The water affair center comprises a reclaimed water advanced treatment system, a boiler make-up water treatment system and an industrial wastewater treatment system, and further provided with a multifunctional test center; and the boiler make-up water treatment system, the industrial wastewater treatment system and the multifunctional test center are sequentially combined and arranged in a centralized mode from left to right, and the reclaimed water advanced treatment system is arranged on the north side of the industrial wastewater treatment system. The thermal power plant water affair center constructed by using the method has the advantages of function integration, system simplification and centralized management, can meet the requirements of modern power plant management and operation, and improves the economical efficiency of power plant operation.

Thermal power plant water affair center

The invention relates to the field of chemical engineering, and particularly discloses a hydrogen supply system and technology. Hydrogen in the fertilizer production process is supplied to a refiningdevice; the hydrogen supply system comprises a first pipe and a second pipe which are connected in parallel; high-pressure hydrogen and low-pressure hydrogen of a Prism outlet of a hydrogen recyclingdevice in a fertilizer synthesis ammonia system are sent to a hydrogen-delivering main pipe of a refining system PSA device together through the first pipe; synthesis gas of an ammonia cooler inlet ofa synthesis gas compressor intersegment is introduced into the hydrogen-delivering main pipe through the second pipe. The invention also provides the hydrogen supply technology, and the hydrogen supply system is used in the hydrogen supply technology for supplying hydrogen in the fertilizer production process to the refining device. The hydrogen supply system and technology have the advantages that the synthesis gas is introduced out of the synthesis gas compressor intersegment, hydrogen is introduced out of a Prism device, the synthesis gas and the hydrogen are converged, then hydrogen is purified through a PSA unit of a refining hydrogen production device, and is supplied to a refining integrated device, production loads of the refining device are improved, the hydrogen capacity is fully used, and hydrogen supplying during overhauling is guaranteed.

Hydrogen supply system and technology

The invention provides a novel salt-containing wastewater concentration treatment device. The device comprises an evaporation chamber, a finned tube heat exchanger (condenser) and a solar energy and power-combined heating module. By adopting a humidifying and dehumidifying method, salt-containing wastewater is evaporated and concentrated by adopting flowing air as a carrier of water vapor; air is humidified by the heated salt-containing wastewater in the evaporation chamber, carries a certain amount of water vapor, separately enters the finned tube heat exchanger according to different temperature gradients in the evaporation chamber, and is condensed and dehumidified to obtain condensate water; and condensate latent heat is recycled through preheating the salt-containing wastewater. Meanwhile, the evaporation chamber is of a two-stage export structure, so that the utilization rate of heat in a tower is greatly improved. The solar energy and power heating module is adopted, solar energy is utilized for heating during the day and power is utilized for heating at night, so that the salt-containing wastewater concentration treatment device plays an energy-saving role, and stable production of a system is ensured. (A structure diagram is as shown in a figure).

Solar energy and power-combined inorganic salt solution concentration system

Det omtales fremgangsmater og en lesker for fjerning av tyngre grus under satsvis lesking av brent kalk i en lesker (2) for produksjon av kalkslurry med hoy finhetsgrad og forlenget sedimenteringstid, der det under leskeprosessen utfores de folgende trinn: a) - reduksjon av omroring i leskeren (2) fra en normal omroringshastighet til en lavere omroringshastighet, b) - apning av en ovre innlopsventil (60) i en oppsamler (70) montert til leskerens (2) nedre del (54), for a lede synkende grus i slurrysatsen til oppsamleren (70), hvorpa den ovre innlopsventilen (60) etter en gitt tidsperiode stenges, c) - oke omroring i leskeren (2) tilbake til normal omroringshastighet, d) - etter en gitt tidsperiode med normal omroringshastighet apnes en reguleringsventil (22) i leskerens (2) nedre del (54) for uttomming av slurrysats til en ekstern lagertank (3), og e) - nar nevnte reguleringsventil (22) apnes for uttomming av slurrysats, apnes valgfritt en nedre utlopsventil (62) i oppsamleren (70) for uttomming av oppsamles grus.

Fremgangsmåte for fjerning av tyngre grus under satsvis lesking av brent kalk, samt tilhørende lesker

The utility model discloses an improved lime milk preparation system utilizing municipal reclaimed water lime treatment. An automatic flushing system and an automatic air extractor are mainly added to prevent depositing and scaling of a blowdown unit and hardening blockage of lime powder at a feeding hole of a steam powder separator. By adopting the method, the defects that the site must be operated by a person in the past, resulting in time and labor waste and high operating and maintenance cost can be solved. The improved lime milk preparation system solves the defects once and for all, so that the field workload is greatly reduced, and the operating and maintenance cost is saved.

Improved lime milk preparation system utilizing municipal reclaimed water lime treatment

A safe, efficient and unattended high-pressure power plant hydrogen supply system comprises a hydrogen storage unit rack connected with a hydrogen manifold through a high-pressure hydrogen hose A hydrogen pressure regulator is disposed at the end of the hydrogen storage unit rack and is connected with the high-pressure hydrogen hose A high-pressure hydrogen hose cylinder valve is disposed on the high-pressure hydrogen hose A hydrogen supply valve, a vent valve, a displacement valve and a sampling valve are disposed on the hydrogen manifold The displacement valve is connected with a flame arrester A specially modified inlet pressure regulator is used, air leakage into the high-pressure hydrogen hose and the hydrogen manifold is avoided when the hydrogen storage unit rack is replaced, and safety is high Purging with inert gas is avoided, so that labor intensity is low

Safe, efficient and unattended high-pressure power plant hydrogen supply system and implementation method thereof

The utility model provides a system for transforming solar energy to reverse osmosis fresh water. The system mainly comprises a solar photovoltaic power generation system and a reverse osmosis system, wherein the solar photovoltaic power generation system comprises a solar cell component, a power regulator, a power distribution panel and the like, and the reverse osmosis system comprises a pretreatment device (such as clarification and filtration), a reverse osmosis device, a fresh water tank, a fresh water supply pump and the like. By adopting the system provided by the utility model, the solar photovoltaic power generation system is utilized to transform the solar energy to electric energy, power is supplied to a high-pressure pump and other loads in the reverse osmosis system via the power regulator and the power distribution panel, fresh water is produced by reverse osmosis operation, the fresh water is stored in the water tank, and then the fresh water can be still supplied to the outside from the water tank at night or under the condition of having no sunshine in rainy days, thus the discontinuity of the solar energy is overcome and the renewable energy is fully utilized.

System for transforming solar energy to reverse osmosis fresh water

The utility model discloses a power plant intensive water treatment island type arrangement form using urban reclaimed water as a water source The power plant intensive water treatment island type arrangement form comprises a circulating water makeup water lime softening treatment system, a makeup water inflow pre-treatment system, a boiler makeup water treatment system, a heat-supply network makeup water treatment system, an industrial wastewater intensive treatment system, a denitration wastewater treatment system, a coal-containing wastewater treatment system, a circulating water by-pass flow lime softening treatment system and a domestic sewage treatment system, wherein coagulation clearing units I, coagulant units I, sterilization units I and produced water storing and conveying units I in the industrial wastewater intensive treatment system and the denitration wastewater treatment system are arranged in parallel According to the power plant intensive water treatment island type arrangement form using urban reclaimed water as the water source, seven large water treatment systems are firstly optimized and integrated, and systems, equipment and facilities with the same functions are combined, so that comprehensive utilization rate of the equipment and the facilities is improved, the total number of the equipment and the facilities is reduced, and communication lines among plant areas in each system room are greatly compressed

Li Yulei

Papers

Improved lime milk preparation system utilizing municipal reclaimed water lime treatment

Safe, efficient and unattended high-pressure power plant hydrogen supply system and implementation method thereof

System for transforming solar energy to reverse osmosis fresh water

Power plant intensive water treatment island type arrangement form using urban reclaimed water as water source