7 results about "Increase pressure" patented technology

The invention discloses a storage tank pressurization control method and system based on LNG gas station fuzzy self-adaptive PID control, and aims to solve the technical problems that a traditional pressurization control method of an LNG storage tank is low in control precision, poor in stability and rapid in equipment abrasion. According to the control method, dynamic compensation for the target pressure is introduced, so that the system can aim at a more accurate control target in the initial stage, the steady-state control deviation is reduced, and the control precision is improved. And static pressure head change disturbance caused by liquid level change is overcome through dynamic compensation, the adjusting burden of the controller is reduced, the controller can focus on processing other dynamic disturbance, and therefore the control process is more stable, and overshoot is smaller. Through the design of a dynamic compensation mechanism and a special fuzzy rule base, the system can automatically adapt to various complex working conditions, and fast, stable and overshoot-free pressure control is always kept. Therefore, frequent and large-amplitude action and surge phenomena of the valve are avoided, and the energy consumption of an executing mechanism is reduced.

When a toilet air injector (100), of the present invention, having a volume that is increased by unfolding a bellows tube (103) of the toilet air injector (100) is put on a rim frame (206) of a toilet (200) with the shape of a bottom plate (106) of the toilet air injector (100) fitted to same, the inside of a toilet bowl (207) is completely sealed together with the air inside the bellows tube (103) of the toilet air injector (100), and when body weight is applied to and presses an upper plate (102), the pressure of the sealed air inside the toilet bowl (207) and the bellows tube (103) gradually increases. The increasing pressure causes pressure, together with residual water (209), to be jetted to an excreta hole (210) and a trap weir (208) at the lower portion of the toilet bowl (200) sealed by residual water (209) of a relatively low pressure critical point, such that the clogged toilet can be fully unclogged. In particular, according to the present invention, the clogged toilet (200) can be fully unclogged without direct contact with contents mixed with the residual water (209) inside the toilet bowl (207), and hygiene and convenience are provided. In addition, the tool can be simply and easily cleaned, unlike a conventional tool that could unclog the clogged toilet (200) only when the tool comes into contact with the contents mixed with the residual water (209) in the toilet bowl (207).

The utility model discloses an oil-water separation device and belongs to the field of oil-water separation. The device adopts a mode of combined installation of multiple treatment tanks, and the treatment units can be increased or decreased according to the treatment capacity; in addition, after sedimentation is completed, the input pipe can be used for pressurizing from the position above liquid, and the water outlet speed is increased; the filter screen located in the middle of the system plays a role in blocking large-particle solids. In the aspect of construction, a filter screen is fixed on a filter screen fixing frame, the inside of the treatment tank is divided into a front filtering area and a rear filtering area by the filter screen fixing frame, the filter screen is blocked between the front filtering area and the rear filtering area, an input pipe and an output pipe are respectively arranged on the upper side and the lower side of the treatment tank, and a safety valve mounting position is arranged on the side of the input pipe. A safety valve mounting position is arranged on the side of the input pipe, a safety valve is mounted on the safety valve mounting position, a bypass pipe mounting position is arranged on the side of the output pipe, a bypass pipe is mounted on the bypass pipe mounting position, and valves are arranged on the input pipe and the output pipe. According to the utility model, the process requirements can be more flexibly met, and the water outlet speed is improved.

The invention discloses variable-frequency water pressure floating ball valve testing equipment which comprises a variable-frequency control box, a pressure tank, a testing table and the like, the pressure tank is provided with a water pumping pipe, a branch pipe, a testing main pipe and an electronic pressure gauge, the water pumping pipe is provided with a variable-frequency water pump and a check valve, and the testing main pipe is provided with a testing pressure gauge and a plurality of testing branch pipes fixed on the testing table. Each test branch pipe can be provided with a to-be-tested floating ball valve through a detachable connector, and the frequency conversion control box is connected with the electronic pressure gauge and the frequency conversion water pump through electric signals, dynamically controls the frequency conversion water pump to pump water and increase pressure by receiving a pressure value of the electronic pressure gauge, and can send a preset pressure value to the electronic pressure gauge. When the pressure in the pressure tank and the test main pipe reaches the preset pressure value after water pumping, the variable frequency control box can control the variable frequency water pump to stop pumping water to form a test, and the test equipment can simulate the actual working condition and accurately simulate the dynamic pressure change to perform a plurality of tests, so that the test process is more efficient and accurate.

The invention relates to the technical field of oil and gas resource development, aims to solve the problems that in the prior art, shale gas well reservoir transformation affects adjacent production wells, and the transformation effect of fractured wells is poor, and provides a method for preventing channeling through pressurization by injecting carbon dioxide into a mother well before sub-well fracturing. An evaluation result is obtained; s2, performing fracturing key parameter evaluation on the sub-wells to obtain an evaluation result; s3, establishing a sub-well fracturing model based on evaluation results of the steps S1 and S2, and optimizing sub-well artificial fracture parameters to obtain an optimization result; s4, according to results obtained in the steps S1, S2 and S3, the carbon dioxide injection amount of the mother well and the pressure of the wellhead of the mother well after pressurization are determined, the pressure of the wellhead of the mother well is increased to the pressure value corresponding to the predicted pressure of fracturing construction of the child well, and a pressurization scheme is obtained; and S5, carbon dioxide is injected into the mother well, pressurization energy injection is carried out, pressure balance of the mother and son well mouths is achieved, and the pressure channeling influence is reduced.

The application provides a kind of detection method and device for high-temperature compression resistance of asbestic-free composite material sealing gasket.The detection method is executed using the detection device, and the detection method comprises the following steps: preheating the pressing plate assembly;obtain the system elastic deformation of the device under different pressure loads as background compensation data;load the sealing gasket to be tested, when the initial contact pressure is monitored by the pressure sensor, mark the reading of the displacement sensor as zero or initial thickness;apply a step-by-step increasing pressure load to the sealing gasket to be tested, and hold pressure at each pressure level;monitor the pressure value fed back by the pressure sensor in real time;when the sealing gasket to be tested creeps and causes the pressure value to drop, the control driving part automatically executes the feeding action to compensate for the pressure loss until the pressure value returns to the target set value;real-time collection of total displacement data detected by the displacement sensor, and calculation of the actual thickness change of the sealing gasket to be tested during the stress process based on the background compensation data.

The invention relates to a device (1) for the preparation of biomass for a fermenter, comprising at least one container (3), at least one inlet (4) and at least one outlet (5), wherein biomass can be fed into the at least one container (3) via the inlet (4) and discharged from it via the at least one outlet (5).According to the invention, the at least one container (3) is configured with at least one steam inlet (6) and at least one steam outlet (7), and at least one secondary steam circulation unit (8) is provided, which is connected to the container (3) via the at least one steam inlet (6) and the at least one steam outlet (7), and through which steam can be circulated in the container to treat the biomass in the container (3) under increased pressure and at increased temperature. A pressure-relieving vessel (9) is provided downstream of the container (3), in which the biomass treated in the container (3) can be depressurized against atmospheric pressure. Furthermore, the invention relates to a method for processing biomass with a corresponding device (1), a flowable mass produced by the method, and a fermenter arrangement (2).