78 results about "Return to work" patented technology

The treating process of waste water produced in making paper with waste paper includes the first stage of physical and chemical treatment with the apparatus of patent ZL 97114281.5 with aluminum sulfate added to the inlet as coagulant and acrylamide as coagulant aid; and the second stage of biochemical treatment in hydrolysis acidification-contact oxidation technique and perforation and flow dispersing aeration mode, with the waste water from biochemical treatment flowing into the secondary deposition pond. Of water after the first stage of treatment, 60-80 % is used as intermediate water returned to work shop, while other flows into the second stage of treatment for reuse in production or exhaust. The sludge from the first stage of treatment is treated in jigging sieve before reuse in production. The present invention may realize the closed circular use of paper-making waste water to reduce waste water exhaust.

The invention discloses an energy-saving security-monitoring control main board, comprising a signal detector interface for connecting a signal detector and transmitting the signal to a control chip; an alarm interface for connecting an alarm and sending an alarm signal; a signal transmission unit for transmitting the alarm signal to the alarm interface after a preset wait time; and a dormant unit for switching the control chip into standby or dormant mode when a power trigger unit and the signal transmission unit stop, wherein the control chip comprises a power trigger unit for returning to working state after receiving the alarm signal, the power trigger unit is connected with the power supply of the alarm interface, communicates the power supply for relative time length according to a preset working time and breaks the power supply of the alarm interface after the preset working time. The invention discloses an energy-saving security-monitoring control device, having low power consumption, integrated detector on one main board and compact structure.

The invention relates to a recycling and seedling technology of organic wastes, in particular to a method for producing a special seedling substrate by utilizing stevia rebaudiana dregs as a raw material. The method comprises the following steps of: mixing 50 to 70 percent of stevia rebaudiana dregs, 20 to 40 percent of waste shiitake logs and 10 to 20 percent of animal feces in percentage by weight, stirring, fermenting, screening and packaging to obtain a finished product. The method comprises the detailed steps of: adding a leavening agent in mixed raw materials according to the proportion of 8: 100; evenly stirring and beginning to ferment with the fermentation temperature of 55 to 70 DEG C and the fermentation time of 20 to 30 days; screening and grading the fermented substrate, crushing coarse grains, returning to working procedures before screening and mixing the fermented substrate, screening again and finally packaging. By adopting the invention, resources are fully utilized, carbon dioxide is fixed and the pollution is reduced. The special seedling substrate produced by taking the stevia rebaudiana dregs as the raw material not only reduces the cost, but also has the characteristics of simple formula, easy operation, strong permeability, sufficient nutrients, and the like, and is suitable for seedling of all plants.

The invention discloses a thyristor rectification tractive power supply system and a protective method. When a short-circuit fault occurs, the thyristor of a traction substation thyristor rectifier closest to a fault element is stopped from working; if the sum value of the fault mark values, measured and calculated after the thyristor is stopped from working, of the element is larger than or equal to 1, a permanent fault is determined, the thyristors of other traction substation thyristor rectifiers of a whole line are stopped from working, all related direct-current isolation switches are opened, the thyristors of the traction substation thyristor rectifiers of the whole line return to work, the power supply of the system is restored, and if the sum value is not larger than or equal to 1, a temporary fault is determined, the related thyristors return to work, and the normal power supply of the system is restored. According to the thyristor rectification tractive power supply system and the protective method, a direct-current breaker can be eliminated, investment is reduced, implementation is convenient, and the system is suitable for carrying out new line construction or old line improvement on fields with lines which are not too long (within 20km and less than 10 traction substations). When the lines are too long, a small number of direct-current breakers can be used for dividing the tractive power supply system.