37results about How to "Low circulation resistance" patented technology

The invention provides a dedicated anti-scale agent for a sulfate section of a salt and sulfate co-production system. The dedicated anti-scale agent is prepared by mixing sucrose phosphate, sodium gluconate, a tartaric acid-malic acid-sodium hypophosphite telomer and purified water according to a certain proportion. Being added into a sulfate section mother liquid of the salt and sulfate co-production system, the anti-scale agent can effectively prevent Ca<2+> and Mg<2+> from generating non-soluble salt crystals, so as to avoid scaling, causing reduction of heat-transfer property and evaporation efficiency, of Ca<2+> and Mg<2+> in sulfate producing equipment, reduce cleaning frequency, remarkably prolong the operation cycle of the sulfate producing equipment, improve sulfate producing efficiency, and improve the quality level of a sulfate product. Moreover, the anti-scale agent can form a corrosion-resistant protecting film on the metal surface of the equipment, so as to reduce corrosion of the mother liquid to the sulfate producing equipment. Adoption in sulfate producing equipment in five salt and sulfate co-production enterprises in China shows that the effects of energy conservation, scaling prevention, stable yield and quality improvement are excellent.

A natural-circulation self-cleaning evaporation device is disclosed. A steel wire screw is mounted in an uplink heating pipe; a twisted strip screw is mounted in a downlink heating pipe. Fluidization balls are added into a circulation solution to realize high-efficient cleaning by the fluidization balls with a low concentration of 0.1%-3.0% in a spiral fluidization state. A boiling pipe is disposed above a heating chamber, is trumpet-shaped, prevents fluidization ball obstruction by adopting a converged section and a gradually-expanded section, and reduces the circulation resistance and the outlet kinetic energy loss. A shunting skirt is designed at the lower end of a lower pipe plate of the heating chamber. The circulation solution flowing downwards is shunted into a circulation main flow and a circulation auxiliary flow before the shunting skirt; the circulation auxiliary flow flows into and stirs the fluidization balls to form a fluidization state when passing through sieve pores on a sieve plate, which allows the fluidization balls to flow into the uplink heating pipe uniformly and smoothly, so as to realize natural circulation flow of the fluidization balls. The spiral-fluidization self-cleaning evaporation device can not only realize natural circulation, but also realize high-efficient automatic cleaning, is reliable in operation, simple in maintenance, and thus can realize both great yield increase and energy saving.

The invention discloses an upper bearing component and a guide rail system. The upper bearing component comprises an upper bearing substrate and an embedding plate, wherein the embedding plate is fixed on the upper bearing substrate and extends along the length direction of the upper bearing substrate; the outer side surface of the embedding plate is a contact surface for being contacted with the rolling surfaces of rolling bodies; the hardness of the embedding plate is more than or equal to 65HRC. The upper bearing component and the guide rail system provided by invention have the advantages that the design of adding the embedding plate on the upper bearing substrate is adopted, the hardness of the embedding plate is reasonably arranged, and the contact surface of the embedding plate is contacted with the rolling bodies, so that the conact area between the upper bearing substrate and the rolling body can be reduced, the service life of the upper bearing substrate is prolonged, the bearing capability also can be improved, the processing is also convenient, and the manufacturing cost is conveniently reduced; due to adoption of the design of concave parts and supporting shoulder parts, the friction force between the rolling bodies and an upper rolling track can be reduced, so that the circular resistance of the rolling bodies is reduced; since the design of arc-shaped end parts is adopted on a carrying plate, the rolling smoothness of the rolling bodies is improved, so that the reliability of operation of the guide rail system is improved.

The invention discloses air-conditioning and refrigeration equipment. The air-conditioning and refrigeration equipment comprises a compressing mechanism, a user side heat exchanger, a heat source side heat exchanger, a heater, a first throttle mechanism, a second throttle mechanism, a first flow direction control valve and a second flow direction control valve. The outlet end of the heater passes through the second throttle mechanism and a sixty-fifth pipe in sequence and is connected with either of two connection ports of the heat source side heat exchanger. The other connection port of the heat source side heat exchanger is connected with either of two connection end points of the first flow direction control valve through a seventieth pipe. One end of the second flow direction control valve is connected with a pipe between the outlet end of the heater and the second throttle mechanism, and the other end of the second flow direction control valve is connected with the seventieth pipe. The inlet end of the first throttle mechanism is connected with the sixty-fifth pipe through a sixty-sixth pipe. The air-conditioning and refrigeration equipment is simple in structure, reliable in work, low in cost and capable of achieving multiple functions such as refrigeration, heating and hot water production.