31results about How to "Reduce wild swings" patented technology

The invention discloses a lift pump house and post-ozone contact pool combined structure. The lift pump house and post-ozone contact pool combined structure is characterized in that a lift pump house suction well which is connected with a water inlet pipe is arranged on the lower layer of a lift pump house, a water outlet confluence channel is arranged on the upper layer of the lift pump house, a lift pump is arranged between the upper layer and the lower layer of the lift pump house, the water outlet confluence channel is communicated with a post-ozone contact pool, an ozone pool is communicated with a water outlet well, and the water outlet well is connected with a water outlet pipe. An ozone generator room is constructed on the upper portion of the post-ozone contact pool in a combined mode, an ozone generator is arranged in the ozone generator room, and the ozone generator is connected with an ozone gas distributing pipe in the contact pool. According to the lift pump house and post-ozone contact pool combined structure, a plurality of structures are compactly and reasonably combined, a water outlet pipeline system of the lift pump house is omitted, an ozone conveying system and an electric transmission line system are simplified, engineering occupied land and investment are saved, and operation fees are reduced; and simultaneously, the storage capacity of the lift pump house suction well is increased, frequent opening times of the water pump are reduced, production management is convenient, and operation safety is guaranteed.

The invention discloses a lift pump house and post-ozone contact pool combined structure. The lift pump house and post-ozone contact pool combined structure is characterized in that a lift pump house suction well which is connected with a water inlet pipe is arranged on the lower layer of a lift pump house, a water outlet confluence channel is arranged on the upper layer of the lift pump house, a lift pump is arranged between the upper layer and the lower layer of the lift pump house, the water outlet confluence channel is communicated with a post-ozone contact pool, an ozone pool is communicated with a water outlet well, and the water outlet well is connected with a water outlet pipe. An ozone generator room is constructed on the upper portion of the post-ozone contact pool in a combined mode, an ozone generator is arranged in the ozone generator room, and the ozone generator is connected with an ozone gas distributing pipe in the contact pool. According to the lift pump house and post-ozone contact pool combined structure, a plurality of structures are compactly and reasonably combined, a water outlet pipeline system of the lift pump house is omitted, an ozone conveying system and an electric transmission line system are simplified, engineering occupied land and investment are saved, and operation fees are reduced; and simultaneously, the storage capacity of the lift pump house suction well is increased, frequent opening times of the water pump are reduced, production management is convenient, and operation safety is guaranteed.

The invention relates to a high-precision segmental pulse generation method for temperature control. By decomposing the binary PWM long pulse into multiple short pulses to achieve the purpose of segmental heating, it can avoid the heating time being too concentrated, resulting in large temperature fluctuations and damage to the heating plate, as shown in Figure 1. Since the segmented pulse is shorter, the temperature control accuracy will decrease compared with the pulse before decomposition. In order to solve this problem, the present invention counts multiple short pulses and performs closed-loop feedback, and evenly adds the low-level phase information after decomposition. To each short pulse, a high-precision, uniform heating pulse generating circuit is realized.

The invention discloses a waste gas incinerator which comprises a hearth, a heat accumulation pipe, a heater, an air inlet, an air outlet and a smoke cooler. An upper sealing end plate is arranged at the upper portion of the interior of the hearth. An upper portion air passing space is formed in the sealed space defined by the upper sealing end plate and the inner wall of the hearth. A lower sealing end plate is arranged at the lower portion of the interior of the hearth, and a lower portion air passing space is formed in the space defined by the lower sealing end plate and the inner wall of the hearth. Waste gas and smoke conduct heat exchange through the wall of the heat accumulation pipe so that the two kinds of gases cannot be mixed mutually, and the waste gas incinerator does not need to switch the flow directions of waste gas and smoke in turns to complete the heat exchange process of heat accumulation and heat releasing like a traditional heat accumulation incinerator. The heat accumulation pipe in the hearth has good thermal capacity and heat conductivity, fast heat absorbing and releasing can be achieved due to the good heat accumulation performance of the heat accumulation pipe, and acute fluctuation of the temperature of the hearth is reduced.

The invention belongs to the technical field of water-based polyurethane resins, and in particular relates to a method for preparing polyisocyanates by photochemical reaction and a method for preparing water-based polyurethane resins. The method for preparing water-based polyurethane resins comprises the following steps: The raw materials of chain extender and hydrophilic agent are polymerized to obtain water-based polyurethane resin; wherein, the content of benzophenone impurities in the polyisocyanate is ≤0.045wt%. By controlling the content of benzophenone impurities in the polyisocyanate preparation process, the invention can effectively improve the anti-yellowing performance of the product, and also reduce the harm of unqualified downstream products caused by the presence of such impurities in the product.

The invention relates to the technical field of large power grid stability control, and specifically discloses an adaptive virtual synchronous control system applied to a direct current transmission system, including a parameter deviation acquisition module, a parameter self-adaptive adjustment module, a virtual governor control module, and a virtual synchronous machine control module and reactive power control module. The present invention also discloses a control method for an adaptive virtual synchronous control system applied to a direct current transmission system, including: S1: collecting detection parameters and generating parameter deviations; S2: sending parameter deviations; S3: judging the Oscillating state of the AC power grid; S4: Generate the adjustment value of the output power reference value of the converter station; S5: Generate the voltage phase angle signal of the AC side bus of the converter station; S6: Generate the voltage phase angle signal of the AC side bus of the converter station; S7: generate PWM signal. The invention improves the inertia level, overall stability and frequency stability of the AC and DC power grid, and reduces power fluctuations and frequency fluctuations.

The invention discloses a top plug-in type spray gun for ventilating and slag gathering and a preparation method thereof. The spray gun comprises a connection segment, a gun body segment and a spray segment which are in successive communication; the spray segment consists of a spray-segment air chamber enclosed at the end, a spray-segment V-shaped anchoring piece and a spray-segment refractory castable; the sidewall of the spray-segment air chamber is provided with dispersion-type nozzles perpendicular to the axis of the sidewall; and the included angle of the center axes of two dispersion-type nozzles at the outermost side is less than 150 DEG. The method comprises: firstly processing and preparing all metal parts of the spray gun according to structural parameters of the to-be prepared spray gun, and removing rust; then preparing and obtaining the spray segment, communicating a main pipe of the gun body segment with the spray-segment air chamber through welding; and selecting steel fiber reinforced corundum mullite castable to perform casting molding, so as to obtain the spray gun. The provided spray gun preparation method guarantees smooth preparation of the spray gun, the structure dimension precision of the spray gun, unblocked gas injection channel and metal structure airtightness, and helps to improve the internal quality and the usage performance of the spray gun.

The invention discloses an upflow type residual oil hydrogenation treatment method. The method comprises: the residual oil feed and hydrogen enter the hydrogenation reactor from the lower part, contact with the hydrogenation catalyst to carry out the hydrogenation reaction, and the product is discharged from the upper part of the hydrogenation reactor, and the hydrogenation reactor is an upflow type A hydrogen reactor, and at least one upflow hydrogenation reactor is used, and each upflow hydrogenation reactor is provided with at least two catalyst beds, and each catalyst bed is filled with the same hydrogenation catalyst. The method of the invention not only has good hydrogenation performance and metal removal capacity, but also has a certain desulfurization and carbon residue and asphaltene conversion capacity, high hydrogenation activity, long service life, and also overcomes the catalyst in the current upflow reactor. There are many types, cumbersome loading and unloading, different active types of catalysts lead to instability of the catalyst bed, which affects the performance of the catalyst and the stable operation of the device.