Abstract

Provided are an efficient energy-saving return cylinder of a hydraulic press and a working method thereof. The efficient energy-saving return cylinder of a hydraulic press comprises a plurality of single-rod return hydraulic cylinders symmetrically distributed at two sides of a main hydraulic cylinder of the hydraulic press, the plurality of single-rod return hydraulic cylinders are divided into several groups, each of the groups consisting of one balancing cylinder and one driving cylinder; a rod chamber of the balancing cylinder is communicated with an accumulator, the pressurized oil in the accumulator is filled into an oil chamber of the balancing cylinder, so that the balancing cylinder balances the weight of a walking beam and a working part of the walking beam; the driving cylinder is differentially connected; in the process of neutral-stroke-rapid-descending and ascending-returning of the walking beam and the working part of the walking beam.

IPC Classes  ?

• F15B 1/04 - Accumulators
• B30B 15/16 - Control arrangements for fluid-driven presses
• F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
• F15B 15/20 - Other details

Abstract

The present disclosure provides an internally self-circulating fluidized bed gasifier and an air distributor therein for generating a stepped constrained wind. The air distributor includes a gas-material mixture through hole and a plurality of vent holes. Each of the vent holes is designed to have a winding path. Due to the winding paths of the vent holes and an arrangement of converging outlets of the vent holes to the gas-material mixture through hole, which is in communication with a furnace chamber, the present disclosure enables a gas entering the furnace chamber to form a stepped constrained wind and effectively prevents solid-phase materials in the furnace chamber from leaking into a gas mixture chamber. The internally self-circulating fluidized bed gasifier can achieve self-circulation combustion gasification for multiple times and a well-controlled gasification temperature, resulting in a high coal gasification efficiency without an ash leakage.

IPC Classes  ?

• C10J 3/84 - Gas withdrawal means with means for removing dust or tar from the gas
• C01B 3/02 - Production of hydrogen or of gaseous mixtures containing hydrogen
• C10J 3/56 - ApparatusPlants

Abstract

The present disclosure relates to a high-efficiency transmission free forging hydraulic machine and an operation method therefor, the machine comprising: a hydraulic cylinder, a hydraulic pump and pressurized energy storage devices. The high-efficiency transmission free forging hydraulic machine is provided with two sets of pressurized energy storage devices between the hydraulic pump and hydraulic cylinder thereof, such that under the action of a control system, the two sets of pressurized energy storage devices may alternately supply isobaric pressure oil or pressurized pressure oil to the hydraulic cylinder of the free forging hydraulic machine. Therefore, when the hydraulic pump is operated at a lower pressure state, the hydraulic cylinder in the free forging hydraulic machine may continuously obtain the isobaric pressure oil or the pressurized pressure oil, thus achieving the objective of residual energy storage and high-efficiency transmission of the hydraulic machine. The high-efficiency transmission free forging hydraulic machine has reasonable resource allocations, a simple setting structure, a good pressurization effect, saves energy and reduces consumption.

IPC Classes  ?

• B21J 9/12 - Drives for forging presses operated by hydraulic or liquid pressure
• F15B 1/00 - Installations or systems with accumulatorsSupply reservoir or sump assemblies

Abstract

A circulating fluidized bed gasifier having an electric heating-assisted temperature adjustment function, relating to the technical field of coal gasification apparatuses. The circulating fluidized bed gasifier having an electric heating-assisted temperature adjustment function comprises a gasifier and an electric heating device. The gasifier comprises a circulating gasification chamber 1, an air distribution plate 2, and a pre-combustion chamber 3. The circulating gasification chamber 1 is located above the air distribution plate 2. The outlet of the pre-combustion chamber 3 is communicated with the lower port of the air distribution plate 2. The electric heating device comprises an electric heater 4, a temperature sensor 5, and a programmable logic controller (PLC) 6. The electric heater 4 is a heat-resistant metal conductive heater. The electric heater 4, the temperature sensor 5, and the PLC 6 are electrically connected. The electric heater 4 and the temperature sensor 5 are provided in the gasifier. For the temperature sensor, a first temperature sensing value and a second temperature sensing value are set. When the temperature sensor detects that the temperature in the gasifier is below the first temperature sensing value, the PLC instructs the electric heater to increase the temperature in the gasifier; when the temperature sensor detects that the temperature in the gasifier reaches the second temperature sensing value, the PLC instructs the electric heater to stop working.

IPC Classes  ?

• C10J 3/56 - ApparatusPlants
• C10J 3/72 - Other features

Abstract

A return cylinder for a hydraulic machine and an operating method thereof. The return cylinder for a hydraulic machine comprises multiple single-rod return hydraulic cylinders (5) symmetrically arranged at two sides of a main hydraulic cylinder (4). The single-rod return hydraulic cylinders cooperate with a hydraulic pump (1), an energy accumulator (7) and the main hydraulic cylinder (4) of a hydraulic machine to accomplish rapid idle stroke descent, pressing and return of a moving beam (6) and an operating portion thereof of the hydraulic machine. The return hydraulic cylinder (5) comprises a balance cylinder and a driving cylinder. The energy accumulator (7) is in communication with the balance cylinder, thereby generating a buoyant force to balance weights of the moving beam (6) and the operating portion thereof.

IPC Classes  ?

• B30B 15/18 - Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
• F15B 15/20 - Other details
• F15B 1/00 - Installations or systems with accumulatorsSupply reservoir or sump assemblies

Abstract

Disclosed are an in-gasifier self-circulating fluidised bed gasifier and a stepped constrained wind air-distribution plate (2) therein, wherein the stepped constrained wind air-distribution plate (2) comprises an air-distribution plate body (200) and a gas and material mixture through hole (203) and a plurality of vent holes (201) located in the air-distribution plate body (200), the gas and material mixture through hole (203) extends from a top face of the air-distribution plate body (200) into the air-distribution plate body (200), gas outlets of the plurality of vent holes (201) are in communication with the bottom of the gas and material mixture through hole (203), gas inlets of the plurality of vent holes (201) are located on the bottom face of the air-distribution plate body (200), and the vent holes (201) are of a curved path design. Compared with the prior art, by providing the arrangement of the curved path of the vent holes (201) of the air-distribution plate (200) and integrating gas outlet ends of the vent holes (201) into the same large aperture channel, i.e. the gas and material mixture through hole (203), the stepped constrained wind air-distribution plate (2) introduces air into the gasifier as a clustered stepped constrained wind, and effectively prevents solid phase matter in a gasifier chamber (1) from leaking into a gas chamber (3); and the in-gasifier self-circulating fluidised bed gasifier can realise self-circulating combustion gasification multiple times in the gasifier, and has the advantages of good control of gasification temperature in the gasifier, a high coal gasification rate, and no ash leakage.

IPC Classes  ?

• C10J 3/50 - Fuel charging devices

Abstract

A hydraulic forging machine and a method for replacing an upper anvil thereof, the hydraulic forging machine comprising: a movable beam (4); an upper anvil (6), which is fixedly connected on the movable beam; a locking hydraulic cylinder (5); a connecting pipe (8); a control valve (9), which is provided on the connecting pipe; and a hydraulic power source of the locking hydraulic cylinder, which is fixedly connected to the movable beam; an end of the connecting pipe is connected to the locking hydraulic cylinder, while another end thereof is connected to a pressure oil chamber of the hydraulic power source of the locking hydraulic cylinder; the hydraulic power source of the locking hydraulic cylinder is a main hydraulic cylinder (2) or return hydraulic cylinder (3) which is fixed on the movable beam; the locking hydraulic cylinder is fixedly connected on the movable beam and is used for controlling the locking and unlocking between the upper anvil and the movable beam; a pressure oil circulates between the locking hydraulic cylinder and the pressure oil chamber of the hydraulic power source of the locking hydraulic cylinder by means of the control valve and the connecting pipe. The hydraulic forging machine achieves synchronous movement between a locking device oil supply loop and the movable beam, thus simplifying the hydraulic locking oil supply loop and improving reliability.

IPC Classes  ?

• B21J 13/08 - Accessories for handling work or tools

Abstract

A gasification agent mixing and pre-combustion technique and device. The gasification agent mixing and pre-combustion device comprises: a gasification furnace (1), a powdered coal conveying pipe (8), a carbon ash conveying pipe (9), and a gasification agent conveying pipe (10). The gasification furnace (1) comprises a furnace compartment (2) provided at an upper portion, an air distribution plate (5) provided at a middle portion, and a gasification agent mixing chamber (7) provided at a bottom portion. The powdered coal conveying pipe (8) transports a powdered coal to a middle portion of the gasification agent mixing chamber (7). The carbon ash conveying pipe (9) transports a carbon ash into a middle portion of the gasification agent mixing chamber (7). The gasification agent conveying pipe (10) transports a gasification agent to a bottom portion of the gasification agent mixing chamber (7). In comparison with the prior art, the method of the present invention adds a high temperature carbon-containing ash and powdered coal during a gasification agent mixing process to perform pre-combustion on the gasification agent, and conducts a mixture of a high temperature coal gas, carbon-containing ash, and gasification agent through an air distribution plate and into a circulating fluidized bed gasification furnace, thereby ensuring successful combustion and pyrolytic gasification of coal in the circulating fluidized bed gasification furnace.

IPC Classes  ?

• C10J 3/80 - Other features with arrangements for preheating the blast or the water vapour

Abstract

A method and apparatus for implementing gasification by combining a circulating fluidized bed and a pyrolysis bed, relating to a coal gasification technology. The method comprises: first implementing pyrolysis and gasification of raw coal by using a circulating fluidized bed gasifier (2) to convert the coal to a gas without producing pollutants, such as tar, and performing gas-solid separation by using a cyclone separator (3); and then, gasifying and burning out the separated semi-coke and the like by using a pyrolysis bed gasifier (11), and introducing the gasified gas into a gas delivery pipeline after removing fly ash through a deposition chamber (4). The technical solution achieves a high raw coal gasification rate, produces no pollutants, such as tar, during gasification, is applicable to equipment with large, medium, and small gasification capacities, and has a large adjustment range of gas yield per unit time.

IPC Classes  ?

• C10J 3/54 - Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
• C10J 3/60 - Processes
• C10J 3/84 - Gas withdrawal means with means for removing dust or tar from the gas