44results about How to "Reduce engineering investment cost" patented technology

The invention which belongs to the technical field of drinking water treatment especially relates to a method for reinforcing the coacervation algae removal and controlling the release of intracellular substances in the process of high algae water treatment. The invention which aims at the eutrophication pollution of surface water sources of lakes, reservoirs and the like provides a method for improving the algae cell removal effect of technologies of coagulation, deposition and filtration of a water work with the combined action of potassium permanganate and a ferric salt, wherein the appropriate oxidation effect of potassium permanganate inactivates and inhibits the activity of algae cells and controls the release of intracellular metabolites, and In situ MnO2 which is in situ generatedthrough a reduction reaction of potassium permanganate deposits on the surface of the algae cells to improve the settlement performance of the algae cells; and the electrical neutralization of the ferric salt allows the potential of the surface of the algae cells to be improved, and In situ Fe(OH)3 which is in situ generated through a hydrolysis reaction of the ferric salt deposits on the surfaceof the algae cells to improve the potential and the settlement performance of the surface of the algae cells. The method of the invention which is mainly applied to the purification in the drinking water work can also be applied to landscape water treatment which aims at the landscape water reuse and the water source pretreatment of the eutrophication water to inhibit the growth of the algae cells.

The invention relates to the technical field of cable-stayed bridges and in particular relates to a method of controlling rigidity of a long span cable-stayed bridge of a railway through a stay cable. The method analyzes influence rules of the cable-stayed bridge on bridge dynamic characteristic, vehicle dynamic response and bridge dynamic response under different numerical values by establishing a long span cable-stayed bridge model of the railway and a bridge model by means of a dynamic analytical method, and performs judgment by taking an evaluating index system of a vehicle-bridge system as an index to obtain influence conditions on the integral rigidity of the bridge under different rigidity numerical values so as to further obtain a reasonable value range of the rigidity of the stay cable, thereby providing basis for valuing and designing the rigidity of the stay cable; the integral rigidity of the long span cable-stayed bridge of the railway is better controlled through the rigidity of the stay cable, so that the long span cable-stayed bridge of the railway achieves a breakthrough on the rigidity control technology; the technical problem is solved, so that the long span cable-stayed bridge of the railway is promoted, and a lot of engineering investment cost is saved.

The invention discloses a distributed rural domestic waste recycling device and an application thereof. The device comprises a waste pretreatment system, a sewage anaerobic fermentation tank and a sewage secondary treatment tank, wherein the waste pretreatment system comprises a household garbage can, a stirring system, an organic garbage decomposition tank and an inorganic garbage storage tank. Compared with the prior art, the distributed rural domestic waste recycling device and the application thereof have the characteristics of wide adaptation to fermentation raw materials, less one-time investment, simplicity and convenience in operation, low operation and management cost, capability of recycling part of clean energy resources, and the like, so that the source reduction of the household garbage is realized, the household garbage reduction rate is over 40%, the collection and transportation cost of the household garbage is greatly lowered, the on-the-spot disposal and the reclamation of the domestic sewage are realized, too many pipelines are not needed to be laid, the needs of distributed rural domestic waste treatment, low investment and low maintenance cost are met, and the popularization and utilization value is very good.

The invention is a BIM-based forward design and operation and maintenance management system for foundation pit engineering. The system can generate a three-dimensional design model and check the model, and utilize BIM operation and maintenance management to guide construction through BIM forward design, so that the manager can clearly grasp the state of the facility, and maintain, update and eliminate the equipment in real time to avoid greater harm and loss. The system is equipped with a cloud and the BIM model can be lightened and uploaded to the cloud, so that multiple parties can participate in the maintenance of the facility, and the emergency processing can also be performed online, which greatly reduces the engineering investment cost.

The invention discloses a supersized wellhead platform, which comprises an upper module, a jacket and a plurality of steel pile foundations, wherein the upper end part of the jacket is connected with the upper module; the steel pile foundations penetrate through pile legs of the jacket; the upper module comprises an upper-layer deck, a lower-layer deck and a working deck, which are sequentially arranged from top to bottom; two well slot areas are arranged at an interval on the upper-layer deck. The wellhead platform also comprises a drilling module, an oil production module and an oil and gas metering module. According to the wellhead platform, large-sized oilfields with water depths of 10 to 40m and more than 50 well slots can be efficiently and rapidly developed with low construction investment cost by one wellhead platform; the project investment is greatly saved under the condition of ensuring the construction progress and safety, the well drilling and completion progress is accelerated to put the oilfield into operation as soon as possible, and the project benefits are remarkably improved; the wellhead platform has broad application prospect in the development of such oilfields.

The invention discloses an underground large-scale cave depot group network gallery type construction and ventilation method, comprising the following steps: establishing a ventilation model taking an existing vertical shaft as a fresh air inlet and taking a construction channel hole as a vitiated air exhausting hole; selecting types of draught fans needed by different cave sections according to ventilation distances of the cave sections, total required airflow of the cave sections, total ventilation resistance in the cave sections and motor power of axial flow draught fans; finally, blocking all the transverse construction channel holes, except the vitiated air exhausting holes, of the cave sections, so as to prevent air flow from short circuit. According to the method disclosed by the invention, a most suitable draught fan quantity and draught fan type are provided for the cave sections with the different ventilation distances and the existing vertical shaft is used as the fresh air inlet, so that the ventilation effect of cave depots can be improved, the consumption of energy sources is also reduced and the construction investment cost is reduced.

The invention belongs to the technical field of sewage treatment devices and in particular relates to an integrated membrane biological reaction system (MBR). The integrated membrane biological reaction system comprises an outer shell, an inner shell, a filtering system and a washing device, wherein the inner shell is arranged in the outer shell; a hollow part of the inner shell forms a first cavity; the first cavity is a membrane biochemical reaction tank; a second cavity is formed between the inner shell and the outer shell; the second cavity is a clean water tank; the filtering system is arranged on the inner shell; the inner shell is communicated with the outer shell through the filtering system; the filtering system is a stainless steel filtering screen; the washing device is arrangedin the first cavity; the washing device is used for washing the filtering system. The integrated membrane biological reaction system provided by the invention integrates a primary sedimentation tank,the biochemical reaction tank and a secondary sedimentation tank and a sewage treatment flow is simplified; the equipment has the advantages of investment saving, reliability in operation, simplicityin maintenance and low operation cost and troubles caused by membrane pollution and low pass in a traditional membrane bioreactor are completely solved; the integrated membrane biological reaction system brings a wider prospect for applying the MBR to middle-scale and small-scale sewage treatment.

The invention provides a solar water pumping device which comprises a rack, a power storage and supply assembly, a photovoltaic panel assembly and a flexible shaft pump assembly. The solar water pumping device provided by the invention overcomes the defects of long power grid transmission distance, high investment cost of power supply equipment and the like, and achieves the purposes of taking solar photovoltaic power generation as water pumping energy and pumping water on site. When being used for irrigation, the solar water pumping device has positive significance for reducing the irrigation operation cost and the irrigation equipment engineering investment cost, and has more pertinence and practicability for irrigation of remote fields which are not suitable for large-scale irrigation equipment. The effect of supplying water to farmlands, pasturing fields, forests and grassland, farmhouses and courtyards without power supply of a power grid is achieved.

The invention belongs to the technical field of the treatment of recycled water, and particularly relates to an active coke modifying method and an application method for removing heavy metal in recycled water by using the modified active coke. The invention provides the active coke modifying method and the application method of the modified active coke, aiming at solving the problem that the membrane outlet water contains high heavy metal content in a recycled water factory adopting a membrane treatment technology. The implementation steps are as follows: pre-treating the active coke, preliminary oxidizing by chlorine and carrying out heat treatment, mixing and blending with high-oxidability acid according to proportion for sufficient time, and carrying out heating treatment to modify the active coke; feeding the modified active coke into a membrane pool to improve the hydrophilia, namely, the polarity on the surface of the active coke according to the content of the acid oxygen-containing functional group (carboxyl, phenolic hydroxyl group, ester group and the like) added on the surface of the modified active coke, so as to improve the adsorption removal effect of the heavy metal in the water. The active coke modifying method and the application method can be used for deeply purifying the two-stage outlet water of the urban sewage plant, and can be used for the recycled water treatment engineering which takes water discharged out of the urban sewage plant or the rain water as water source.

The invention relates to a novel high-medium-low-pressure wear-resisting double-gate-disc ash gate valve. The gate valve comprises a valve body, two valve seats, a valve deck, gate discs and a driving mechanism of the gate discs and is characterized in that each valve seat is in the shape of a flange, the two valve seats are connected to the inner ends of flow channels on the two sides of the valve body respectively, an O-shaped sealing ring is arranged between each valve seat and a valve body contact surface, annular grooves corresponding to the valve seat sealing surfaces are formed in the two side faces of each gate disc respectively, hard alloy is arranged in each annular groove through bead welding, an inner annular groove and an outer annular groove are formed in each valve seat sealing surface, hard alloy is arranged in each inner annular groove through bead welding or a ceramic ring is embedded in each inner annular groove, and each outer annular groove is filled with a soft sealing ring. The gate valve is reasonable in structural design, reliable in use, and capable of fundamentally solving the problems of an existing ash gate valve that wearing occurs easily, sealing performance is poor, service life is short, maintenance is not easy, and using cost is high, wearing resistance and sealing performance are improved remarkably, service life is prolonged, and maintenance is facilitated.

The invention belongs to the technical field of the treatment of recycled water, in particular to an active coke modifying method for removing organisms in the recycled water and an application method of modified active coke, which aims at solving the problems that the content of organisms in the water discharged by a membrane in a recycled water factory adopting the membrane treatment process is high and the membrane pollution is severe, and provides a modification method and an application method of active coke. The method for modifying the active coke comprises the following steps of preprocessing the active coke, mixing the active coke with an alkaline solution according to a given ratio for sufficient time, and then heating the active coke to realize the modification of the active coke; and placing the modified active coke into a membrane pool. The oxygen-containing alkaline radicals and hydroxyl radicals added on the surface of the modified active coke are used for increasing the non-activity of the surface of the active coke, so that the effect for adsorbing and removing the organisms in the water can be improved. The active coke can be used for further purification of secondary water of an urban sewage plant and also can be used for the recycled water treatment project adopting the discharged water from urban sewage plant or rainy water as a water source.

The establishment of the power project cost database system includes analyzing and determining the key technical and economic indicators of power project investment control, and establishing a project cost data collection model; establishing a historical project cost experience database to provide reference data for reviewing project cost; intelligently selecting historical projects to realize historical Automatic comparison between projects and pending projects to improve review efficiency. The establishment of this database system is safe and reliable, with advanced technology, environmental protection, reasonable investment, unified standards, and efficient operation, and promotes the construction of power grids to better cooperate with social and economic development, avoiding the risk of investment waste becoming a bottleneck in economic development. On the other hand, under the premise of ensuring the safe and reliable operation of the power grid and the social demand for electricity, reasonably reduce the project investment cost, minimize the operating cost of the power grid enterprise, and realize the sustainable development of the company, thereby proposing safe, reliable and high-quality solutions for social development. , Low-cost electricity supply.