37results about How to "Reduce medium temperature" patented technology

A water cooling valve clack structure of a 1500 DEG C ultrahigh-temperature valve comprises a valve rod and a valve clack body. The upper end of the valve clack body is connected with a convex lug through a flange, a runner inlet end in the convex lug is communicated with a concave pit in the valve clack body while a runner outlet end in the same is connected with a recycling end of an externally-connected cooling system, the concave pit is communicated with an inlet end of the externally-connected cooling system through a water cooling nozzle, the convex lug comprises an inner ring portion and an outer ring portion which are hermetically assembled into a whole, grooves are uniformly distributed in the outer circumferential face of the inner ring portion, holes in up-down arrangement are processed in the grooves, and upper-layer holes and lower-layer holes are formed in the whole periphery and all communicated with the inner surface of the inner ring portion. Due to the structure, direct scouring of a valve seat sealing face by a high-temperature medium is greatly reduced, and service life of the valve is prolonged, and running reliability of the valve is improved; heat transfer and thermodynamic calculation shows that a valve clack can run safely and reliably under a working condition of 1500 DEG C.

The invention is a steam heat exchanger, which comprises a composite header, a first-stage steam inlet header and a secondary steam inlet header are arranged above the composite header, and a transition is passed between the composite header and the secondary steam inlet header It also includes two sets of heat exchange tubes or heat exchange plates, wherein the inlet and outlet ends of the first set of heat exchange tubes or heat exchange plates are respectively connected to the first-stage steam inlet header and the composite header, and the second set of heat exchange tubes or The inlet and outlet ends of the heat exchange plate are respectively connected to the secondary steam inlet header and the composite header. The invention improves the steam flow rate along the flow direction of the condensate in the first-stage heat exchange tube and the heat exchange plate (tube) process, accelerates the discharge speed of the condensate film, greatly reduces the thickness of the condensate film, and makes it possible to generate The turbulent flow greatly improves the heat exchange efficiency in the first group of heat exchange plates (tubes). The invention greatly simplifies the pipeline structure including the header, and reduces the secondary pipeline connection between the heat exchanger groups. Make it more convenient to process and assemble.

The invention discloses a self-control type energy-efficient heat tracing system and belongs to the fields of petroleum refining, petrochemical engineering and petroleum storage and transport. According to the heat tracing system, steam serves as a heat tracing medium. A control system is arranged in a steam heat tracing system. The self-control type energy-efficient heat tracing system comprises the steam heat tracing system and a blowing and sweeping air system. The blowing and sweeping air system and the steam heat tracing system are interlocked through a control unit when a petroleum refining and chemical engineering device or a petroleum storage and transport system is operated, so that servo operation of use / cutting of the steam heat tracing system and the operation state / shut-down state of the petroleum refining and chemical engineering device or the petroleum storage and transport system is achieved. An existing continuous inflow steam heat tracing mode is improved into a self-control intermittent feeding type steam heat tracing mode, system operation is good, intelligent control over the steam heat tracing system in the operation state of the petroleum refining and chemical engineering device or the petroleum storage and transport system is achieved, steam is reasonably and intermittently used, it is guaranteed that the temperature of the medium is lower than the temperature of the heat tracing steam, and waste of energy and consumption of water resources are effectively reduced.

The invention discloses a rotor temperature measurement and simulation system and method of a low-temperature centrifugal fluid machine. The system includes a refrigerator, a centrifugal fluid machine to be tested, a flow meter, a flow regulating valve, a power fluid machine, and a heater, which are connected through pipelines. In the present invention, the refrigerating machine is used as a cold source, the power fluid machine provides circulating power for the medium in the system, and the rotor of the centrifugal fluid machine to be tested remains stationary. The system can realize the rotor temperature measurement of centrifugal fluid machinery when transporting low-temperature working fluid, obtain a complete internal temperature field and axial heat leakage, and help the design of the thermal insulation structure of the whole machine.

A cooling device of a 1500 DEG C ultrahigh-temperature valve body comprises a medium inlet passage, a valve body middle port position, a valve cover and an end cap. The medium inlet passage and the valve body middle port position are arranged on the valve body and connected with each other, a high-temperature ceramic heat-insulating lining cooling structure is arranged on the medium inlet passage on the valve body, a valve body middle port is provided with a valve body middle port water cooling system, and requirements on safe and reliable running under a working condition of 1500 DEG C and 5.0 MPa are met. Part of heat of a high-temperature medium is absorbed by a midbody water cooling lower portion where pressure drop is formed, and pressure and temperature of the medium are further lowered; due to the structure, direct scouring of a valve seat sealing face by the high-temperature medium can be greatly reduced, service life of the valve is prolonged, and running reliability of the valve is improved.

The invention relates to the technical field of heat exchange, in particular to an energy saving heat exchanger comprising a shell 1. One end of the shell 1 is provided with a terminal box 2, a first tube plate 3 and a second tube plate 4 which are perpendicular to the axis of the shell are arranged in the shell 1, a heat exchanging tube 5 is arranged between the first tube plate 3 and the second tube plate 4 and penetrates the same, an electrical heating tube 6 connected with the terminal box 2 is arranged in the heat exchanging tube 5, a shell inlet 7 and a shell outlet 8 are formed in the shell between the first tube plate 3 and the second tube plate 4, a tube inlet 9 is formed in the shell between the second tube plate 4 and the terminal box 8, and a tube outlet 10 is formed in the shell between the first tube plate 3 and the bottom of the shell. The energy saving heat exchanger is applied in the field of heat exchangers, and has the advantages that additional hot fluid medium is omitted, control is facilitated, energy can be saved, and service life is long.

The invention discloses a marine seawater instant freezer used for instantly freezing marine products on a ship. The marine seawater instant freezer is arranged in a cabin or a refrigeratory of a cabin and provided with a freezing tank, a water tank, a refrigeration unit matched with the freezing tank, a conveying system and a hanging basket used for containing marine products. A liquid freezing medium used for freezing marine products is contained in the freezing tank. The hanging basket containing marine products is arranged in the freezing tank, the marine products is placed into the water tank after being cooled through the freezing medium, the surfaces of the marine products are instantly frozen, and therefore instant freezing of marine products is completed. Energy consumption can be greatly reduced, the purpose of instantly freezing marine products on sea better more rapidly is achieved, and the quality and delicious taste of the marine products can be kept.