132results about "Superheating control" patented technology

This invention discloses a supercritical carbon dioxide cycle generator set water spray desuperheating system, comprising a supercritical carbon dioxide cycle power generation system and a water spray desuperheating system; the supercritical carbon dioxide cycle power generation system includes a heater, a screen-type superheater, a final-stage superheater, and a turbine; the water spray desuperheating system includes a first desuperheating water injection point, a second desuperheating water injection point, and a liquid-water separation system; the heater outlet is sequentially connected to the turbine inlet via the first desuperheating water injection point, the screen-type superheater, the second desuperheating water injection point, and the final-stage superheater; the turbine outlet is connected to the inlet of the liquid-water separation system; the liquid outlet of the liquid-water separation system is connected to the first and second desuperheating water injection points; and the gas outlet of the liquid-water separation system is connected to the heater inlet. This system can solve various problems caused by carbon dioxide desuperheating.

The invention discloses a thermal power generating unit main reheating steam temperature wide-load self-adaptive adjusting method and system, relates to the technical field of electric power industry automation and control, and aims at solving the problems that an existing adjusting method is large in steam temperature fluctuation, high in thermal stress and poor in main reheating collaboration under the wide-load working condition. The method comprises the steps of calculating main steam phase saturation and mapping a target value; calculating the maximum change rate based on the thermal physical parameters of the material, and generating a reference track with the limited change rate; the steam phase saturation of the main steam is used as a phase reference, and the reheated steam is controlled to respond according to a preset phase difference; a combustion system, a flue gas temperature adjusting baffle and a temperature reducing water system are cooperatively controlled; the system comprises a vapor phase saturation processing module, a dynamic boundary generation module, a phase coordination control module, an execution mechanism coordination module, a steady state detection module and a mode switching module. Accurate steam temperature adjustment under the wide load is achieved, material thermal stress is reduced, unit operation safety and economical efficiency are improved, and the variable-load operation requirement of the unit is met.

This invention belongs to the field of heat exchange technology, specifically relating to a steam comprehensive utilization all-contact desuperheater, including a desuperheater body, a water inlet pipe, a drain port, desuperheater inlet and outlet, and a desuperheating atomization unit. The desuperheater body contains a buffer impeller, a baffle plate, and a protective chamber. The desuperheating atomization unit includes a mounting frame, a recessed splash guard, a perforated plate, and a reaction ring. After being buffered by the buffer impeller, the superheated steam directly contacts the uniform water film on the surface of the reaction ring along the opening direction of the protective chamber for heat exchange, resulting in complete vaporization of the desuperheating water. The steam is discharged after water droplets are separated by the baffle plate, and the condensate is collected and discharged from the desuperheater outlet for subsequent treatment. This invention improves heat exchange efficiency through uniform water flow distribution, and the modular design of the desuperheating atomization unit facilitates maintenance.

The invention provides an integrated temperature and pressure reduction device based on pressure control and a working method, and belongs to the technical field of steam utilization. The problems that in the prior art, temperature and pressure reduction operation of steam is difficult to achieve efficiently and accurately, and the steam utilization efficiency and safety are affected are solved. The temperature and pressure reducing valve comprises a main flowing pipe, a temperature and pressure reducing cavity, an inner sealing face, an outer sealing face and a pressure control spring, a temperature and pressure reducing water inlet is formed in the upper portion of the main flowing pipe, the temperature and pressure reducing cavity is installed in the main flowing pipe, the temperature and pressure reducing water inlet is communicated with the temperature and pressure reducing cavity, and the inner sealing face is arranged on the inner wall of the main flowing pipe. An inner sealing face is arranged on the outer wall of the temperature and pressure reduction cavity, an outer sealing face is arranged on the outer wall of the temperature and pressure reduction cavity and makes contact with the inner sealing face in a matched mode, a plurality of runners are arranged at the tail end of the temperature and pressure reduction cavity, the pressure control spring is installed between the outer wall of the tail end of the temperature and pressure reduction cavity and the inner wall of the flowing main pipe, and the initial state of the pressure control spring is a compressed state. The device is mainly used for reducing temperature and pressure.

The application discloses a full-hydrophobic baffle temperature-regulating subcritical low-calorific-value coal gas-fired boiler, the lower part of the water-cooled wall is a low-calorific-value coal gas combustion zone, the upper part is a variable cross-section heating surface arrangement zone, low-temperature superheaters and low-temperature reheaters are arranged in the front and rear flues of the wall respectively, and flue gas baffles are arranged at the outlets of the two to regulate the temperature. The lower part of the wall is sequentially connected with a high-temperature economizer, a denitration device and a low-temperature economizer for hierarchical arrangement. The heating surfaces such as the low-temperature superheater and the screen-type superheater are horizontally arranged. The application utilizes the baffle temperature regulation to improve the heat transfer efficiency and fuel utilization rate; the hierarchical economizers guarantee the full-load denitration of the boiler and meet the requirement of the flue gas temperature; and the horizontally arranged heating surfaces realize full hydrophobicity, effectively preventing the accumulation of oxide scales.

NUCLEAR STEAM SUPPLY SYSTEM AND METHOD This disclosure relates to a nuclear steam supply system, comprising: a nuclear power plant, a heat source circuit, a working fluid circuit, a steam consumer, and a steam heat accumulator, where the nuclear power plant is connected to the heat source circuit, the working fluid circuit is connected to the steam consumer and the steam heat accumulator, the steam heat accumulator is connected to the steam consumer, and the heat source circuit and the working fluid circuit are independent of each other. This disclosure allows for peak levelling load adjustment of the nuclear power plant and steam load adjustment of the steam consumer, while ensuring the operational safety of an electrical grid and a reactor. Summary figure: Fig. 1

This utility model discloses a brewery heating system with molten salt energy storage, including a water source heat pump module. The water source heat pump module comprises a first working fluid-water heat exchanger, an expander, a second working fluid-water heat exchanger, a compressor, a water storage tank, a second water pump, and a third water pump. The water source heat pump module is used to convert the low-quality heat from waste hot water generated in the brewery's process into high-quality heat. This utility model addresses the current situation of energy waste and steam demand in breweries by utilizing a water source heat pump module, a molten salt energy storage module, and a steam generation module. It can be designed to take advantage of the availability of off-peak electricity and renewable energy sources, and is equipped with a molten salt electric heater to fully utilize off-peak electricity or renewable energy, reducing steam costs in the industrial park. The heat pump system can recover heat from the waste hot water, improving energy efficiency.

The utility model relates to the technical field of heat exchange and temperature reduction devices, and discloses a dry quenching steam efficient heat exchange and temperature reduction device for a methanol conversion procedure, which comprises a spray pipe, a connecting cover is welded at the top of the spray pipe, a bolt is arranged at the top of the connecting cover, and one end of the inner wall of the bolt is in threaded connection with a threaded rod. The output end of the bottom of the threaded rod extends to one end of the inner wall of the connecting cover, the bottom of the threaded rod is fixedly connected with a pressing piece, the bottom of the pressing piece is fixedly connected with a spring, the output end of the bottom of the spring is fixedly connected with a piston piece, and the outer side wall of the piston piece is in sliding fit with the inner wall of the spray pipe. The flow of the desuperheating water is accurately controlled, then the steam temperature is accurately adjusted, the unique threaded rod and piston piece linkage structure can flexibly change the flow area of the narrow channel, the nozzle is matched for atomizing the desuperheating water, the heat exchange efficiency is improved, the stable operation of the methanol conversion procedure is guaranteed, the energy consumption and the maintenance cost are reduced, and the device is more practical.

The application provides a control system and method for medium-pressure steam admission in a gas-steam combined cycle unit, comprising a medium-pressure water extraction pump, a superheater, a medium-pressure bypass regulating valve, a condenser, a medium-pressure steam regulating valve, a reheater and a steam turbine, the medium-pressure water extraction pump is connected with the superheater through a pipeline, the water outlet of the superheater is connected with the condenser and the medium-pressure cylinder of the steam turbine through pipelines, the medium-pressure bypass regulating valve is arranged on the pipeline corresponding to the condenser, the medium-pressure steam regulating valve is arranged on the pipeline corresponding to the steam turbine, and the reheater is arranged between the medium-pressure steam regulating valve and the steam turbine. The control system and method for medium-pressure steam admission in the gas-steam combined cycle unit can maintain the medium-pressure drum liquid level in a safe liquid level range through the medium-pressure feedwater regulating valve, realize automatic control during medium-pressure steam admission through the opening and closing of the medium-pressure steam regulating valve and the medium-pressure bypass regulating valve, and reduce misoperation.

The invention discloses an overheating attemperation water control method and system with autonomous decision-making and flexible control functions, and belongs to the field of intelligent control of gas-steam combined cycle units. Comprising a first constant module, a first smaller module, a first subtraction module, a second constant module, a first larger module, a first AND module, a third constant module, a second smaller module and a first OR module. The first constant module is connected to the first smaller module; the output end of the first subtraction module and the second constant module are respectively connected to the first greater module; the first smaller module output end and the first larger module output end are respectively connected to the first AND module; the third constant module is connected to the second smaller module; the first AND module output end and the second AND module output end are respectively connected to the first OR module; and the output end of the first or module is connected to an overheat attemperation water valve forcibly-closed instruction. The requirement that the actual steam temperature is unidirectionally increased according to the preset temperature rise rate in the unit starting process is met.

The invention discloses a process-oriented forward acceleration device and system controller. The device comprises a first addition link, an amplitude limiting integrator, a differentiator, a forward output controller and a second addition link, the amplitude limiting integrator comprises an integrator and an integrator amplitude limiting controller; and the integrator amplitude limiting controller is used for limiting the amplitude of the output of the integrator. The first addition link is used for adding the output signal of the integrator and the external process signal, accelerating the external process signal and outputting an acceleration signal to the differentiator. According to the method, the forward control quantity can be advanced, and the method has a good effect on restraining forward overtemperature of the overheat steam temperature control system.

The utility model discloses a waste incineration waste heat boiler desuperheating water position adjusting device, and relates to the technical field of waste incineration waste heat boiler desuperheating water position adjusting. A gate valve and a tee joint are connected into a superheater connecting pipe for connecting a low-temperature superheater I, a medium-temperature superheater I and a medium-temperature superheater II. The flow direction of steam in the pipeline is adjusted through opening and closing of the gate valve, so that the access position of the attemperation water is adjusted, and the position of the attemperation water is adjusted from the original position between the low-temperature superheater I and the medium-temperature superheater I to the position between the medium-temperature superheater I and the medium-temperature superheater II. After the steam superheat device is adopted, the steam superheat degree of the outlet of the medium-temperature superheater I is improved compared with that of the outlet of the low-temperature superheater I, and the problem that the steam superheat degree is not enough when the desuperheating water amount at the outlet position of the low-temperature superheater I is too large is effectively solved. And meanwhile, the medium-temperature superheater I is reduced behind the desuperheater, and the steam is not easy to overheat at the outlet of the medium-temperature superheater II, so that the adjusting efficiency of the boiler is improved, and the safe operation of the boiler is guaranteed.

This invention relates to the field of boiler technology and discloses an automatic adjustment system for boiler desuperheating water flow rate, used in a boiler including a superheater, a reheater, and a feedwater pump. The system includes a main desuperheating system, a secondary desuperheating system, and a control device. The main desuperheating system controls the steam temperature at the superheater outlet, and the secondary desuperheating system controls the steam temperature at the reheater outlet. The main and secondary desuperheating systems are connected in parallel to the feedwater pump. The automatic adjustment system for boiler desuperheating water flow rate disclosed in this invention can automatically adjust the boiler desuperheating water flow rate according to the steam temperature in the boiler superheater to ensure the normal operation of the boiler.

The invention relates to the technical field of automation control, in particular to a control method, device, equipment and medium of a steam regenerative coupling heat supply system.The method comprises the steps that a first target pressure value of a heat supply main pipe and a second target pressure value of a steam main pipe are obtained; the first target pressure value and a first feedback pressure value of the heat supply mother pipe are input into a first controller, and the first controller outputs a first control quantity based on a corresponding target parameter; the first control quantity, the second target pressure value and a second feedback pressure value of the steam main pipe are input into a second controller, and the second controller outputs a second control quantity based on a corresponding target parameter; and controlling the steam pressure regulating valve according to the second control quantity. According to the method, cooperative stabilization of the pressure of the steam mother pipe and the heat supply mother pipe can be achieved, mutual influence of the pressure of the steam side and the heat supply side in the steam regenerative coupling system is avoided, and safe and stable operation of the induced draft fan is guaranteed.

The present invention provides a steam flow control device, a power plant, a steam flow control method, and a steam flow control program that enable load reduction while maintaining dry operation. [Solution] The steam flow control device 50 is a steam flow control device 50 for a power plant that includes a bypass line for bypassing steam passing through the heat recovery section of a boiler and a bypass valve for adjusting the steam flow rate, and comprises an acquisition unit 51 for acquiring the required power generation amount of the power plant, a calculation unit 52 for calculating the corresponding steam flow rate and bypass valve opening degree, which is the opening degree of the bypass valve, based on the acquired required power generation amount, and an adjustment unit 53 for adjusting the opening degree of the bypass valve so that it corresponds to the calculated steam flow rate.

The invention belongs to the technical field of boilers, and provides a superheating corner tube steam boiler and an operation method thereof. The superheating corner tube steam boiler comprises a boiler body, a boiler barrel, a superheater, an air preheater, an energy saver and a condenser; a water pipe system is arranged on the heating surface of the hearth and the flue gas channel, the water pipe system comprises a slag solidification pipe set and a convection pipe set, the flue gas channel comprises a first channel, a side flow channel and a second channel which are arranged in the flue gas flowing direction, and the slag solidification pipe set, a second superheater, a first superheater and the convection pipe set are sequentially arranged in the second channel in the flue gas flowing direction; the first superheater and the second superheater form a two-way steam system working synchronously, the first superheater comprises two stages of superheating structures, a first desuperheater is arranged between the two stages of superheating structures, and a second desuperheater is arranged at an outlet of the second superheater. The device can stably operate under the condition of low-calorific-value gas calorific value fluctuation, double-path steam is synchronously output, and load change of a steel production line is flexibly adapted.

The application provides a kind of π type boiler with low temperature heating surface arranged in furnace and flue gas recirculation, and belongs to the field of π type boiler.The outlet of horizontal flue is connected to the tail flue of the boiler, and the tail flue is divided into front tail flue and rear tail flue, low temperature superheater and economizer are arranged in the front tail flue, low temperature reheater and economizer are arranged in the rear tail flue, and flue gas temperature control baffle is installed in the front and rear flue at the outlet of the tail flue;The left and right sides of the boiler bottom hearth are connected to the flue gas recirculation fan through the connecting flue.The application adopts a variety of coupled optimization temperature control mode.Coupled optimization temperature control mode is the comprehensive use of the above several temperature control modes, two or more temperature control modes are used during the operation of the boiler, and the steam temperature is adjusted at the same time.Compared with the use of single temperature control mode, the coupled optimization mode can provide larger temperature control range and more accurate temperature control.

The application discloses a kind of overheat steam temperature control systems of no water injection post-steam temperature measurement signal, first controller carries out comprehensive operation to overheat steam temperature measurement value and overheat steam temperature set value and forms overheat temperature reducing water flow demand signal, second controller carries out comprehensive operation to overheat temperature reducing water flow demand signal and temperature reducing water flow measurement value and forms temperature reducing water regulating door opening degree instruction, and MA hand / automatic operation station is controlled temperature reducing water regulating door opening degree, realizes overheat temperature reducing water flow and overheat steam temperature closed-loop control;Using temperature reducing water flow closed-loop control, can accurately control overheat temperature reducing water flow, effectively overcome the non-linear defect of overheat temperature reducing water regulating door valve opening degree-flow, improve the comprehensive regulation quality of overheat steam temperature;And since no water injection post-steam temperature measurement signal that is difficult to accurately reflect temperature reducing water flow change is used, the regulation quality of conventional cascade overheat steam temperature control system is also avoided and the problem that overheat steam temperature automatic control is difficult to realize.

A process for generating process steam (3) using condensate (4) recycled in the form of feedwater (11) is described and illustrated. In order to achieve higher efficiency with the process, it is provided that the process steam (3) is supplied to a consumer device (V) to form a condensate (4) by at least partial condensation of the process steam (3), that the condensate (4) from the consumer device (V) is fed to a feedwater treatment plant (7) for treatment, that feedwater (11) from the feedwater treatment plant (7) is separated in a flash tank (12) into a vapor phase (13) and a liquid phase (14), that the liquid phase (14) of the feedwater (11) is evaporated in an evaporator (19) to form raw steam (21), and that the vapor phase (13) of the feedwater (11) and the raw steam (21) are compressed in at least one compressor (15) to form process steam (3).

The utility model relates to the technical field of steam decompression mixers, and discloses an integrated auxiliary steam decompression mixer which comprises a mixer body, a vortex nozzle is arranged in the mixer body, a Venturi mechanism is arranged in the mixer body, and the vortex nozzle and the Venturi mechanism are arranged in the mixer body. The bottom face of the mixer body is connected with an auxiliary steam inlet pipe in a penetrating mode, an adjusting mechanism is arranged in the auxiliary steam inlet pipe, and the Venturi mechanism comprises a Venturi water inlet pipe arranged in the mixer body. According to the integrated auxiliary steam pressure reduction mixer, through the arrangement of the adjusting mechanism, when the integrated auxiliary steam pressure reduction mixer is used, a rotating handle is rotated, the rotating handle rotates to drive a rotating rod to rotate, the rotating rod rotates to drive a rotating plate to rotate, and the opening and closing degree between the rotating plate and an auxiliary steam inlet pipe can be adjusted; further, the amount of the auxiliary steam entering the device can be accurately controlled, so that the working pressure requirement of equipment is met, and the equipment is prevented from being damaged due to too large pressure.

The utility model belongs to the technical field of desuperheaters, and particularly relates to a multi-working-condition desuperheater which comprises a shell, a water injection pipe is arranged on the outer circle face of the shell, a desuperheating ring is arranged at one end of the water injection pipe and located in the shell, a spray head is arranged on the inner circle face of the desuperheating ring, a flow dividing block is arranged outside the desuperheating ring, and the flow dividing block is fixedly connected with the inner wall of the shell. Cavities are formed in the flow dividing blocks and the temperature reducing ring, a flow dividing cavity is formed between every two flow dividing blocks, a filter plate is arranged on one side of each flow dividing block and located in the shell, a scraper is rotationally arranged on the outer surface of each filter plate, and a check block is arranged on the inner wall of the shell and located in the inclined plate in a sliding mode. Meanwhile, by arranging a plurality of flow dividing blocks, the raw materials can be divided, the temperature reducing effect of the flow dividing blocks is improved, and by arranging structures such as a filter plate and an impeller, not only can the raw materials be filtered, but also performance consumption can be reduced.

The utility model discloses a multi-pressure steam superheater, which relates to the technical field of superheaters, and comprises a hearth which is of an n-shaped arrangement structure and comprises a heat insulation flue of a burner outlet, a burner arranged at the front end of the heat insulation flue, and a convection heating surface arranged at the outlet of the heat insulation flue. A high-pressure superheater II, a high-pressure superheater I, a medium-pressure superheater II, a medium-pressure superheater I, a low-pressure superheater II, a low-pressure superheater I, a low-low pressure superheater, a steering flue, a tubular air preheater and an outlet flue are sequentially arranged in the convection heating surface; a high-pressure superheater spray desuperheater is arranged in a pipeline between the high-pressure superheater I and the high-pressure superheater II, a medium-pressure superheater spray desuperheater is arranged in a pipeline between the medium-pressure superheater I and the medium-pressure superheater II, and a low-pressure superheater spray desuperheater is arranged in a pipeline between the low-pressure superheater I and the low-pressure superheater II. According to the utility model, the multi-pressure steam overheating condition under various process links of a coal chemical system can be met, the pipe is convenient to block or replace, and meanwhile, the pipe panel is not easy to deform due to overtemperature.

The utility model discloses an on-line adjustable dead steam recovery device which comprises an injection pump, an auxiliary mechanism is arranged on the surface of the injection pump, a filtering mechanism is arranged at the connecting end of the injection pump, through the auxiliary mechanism arranged on the injection pump, rapid installation and accurate positioning are achieved, heat loss is effectively reduced, and the service life of the injection pump is prolonged. The sealing performance and the integrity of the heat preservation cover are enhanced, it is ensured that heat is effectively isolated in the heat preservation cover, the heat loss of a working medium in the transmission process is reduced, the dead steam recovery efficiency is remarkably improved, and it is ensured that equipment can stably and efficiently operate under various working conditions; the jet pump has the advantages that dead steam entering the jet pump can be filtered in a multi-stage manner and is prevented from entering the pump body to cause blockage, the dead steam entering the pump body is pure and free of impurities, and components in the jet pump are effectively protected, so that the reliability of equipment is improved, the service life of the equipment is prolonged, the equipment failure maintenance frequency caused by the impurities is reduced, and the maintenance cost is reduced.

The invention discloses a graded steam supply system for an oil field electrode boiler and a control method of the graded steam supply system. The system comprises an electrode boiler, an electric superheater, a first heat exchanger and a second heat exchanger. 2-3 MPa saturated steam is generated by the electrode boiler, is heated to 400-500 DEG C through the electric superheater, firstly enters the first heat exchanger to heat 2.6-14 MPa medium-high pressure feed water into saturated steam through sensible heat, then enters the second heat exchanger to heat 0.1-2.5 MPa low pressure feed water into saturated steam through latent heat, and condensate water flows back. The system achieves fine control through eight control valves and two water pumps, and the core control method is that an intelligent control module calculates and maintains the mass flow ratio (K1 = 0.21-0.32, K2 = 0.70-0.82) of the primary side and the secondary side of the first heat exchanger and the second heat exchanger in the optimal interval. Accurate gradient utilization of steam energy is achieved, the system adaptability is high, the energy efficiency is high, and control is intelligent.

The invention relates to a process for obtaining a hydrogen stream (1) in a plant (2), wherein a carbon-containing energy carrier stream (3) and an oxygen stream (4) are fed from an oxygen recovery arrangement (5) of the plant (2) to an ATR reactor arrangement (6) of the plant (2) for obtaining a synthesis gas stream (7) comprising hydrogen and carbon oxides, wherein the ATR reactor arrangement (6) affords the synthesis gas stream (7) from the energy carrier stream (3) by autothermal reforming with the oxygen stream (4), so that a catalytic partial oxidation in particular provides the heat required for the endothermic reforming reactions, wherein the synthesis gas stream (7) is fed at least partly to a separating device (8) of the plant (2) for separating the synthesis gas stream (7) into the hydrogen stream (1) including hydrogen and a purge stream (9) including carbon oxides, wherein the plant (2) has a steam heater (13), which steam heater (13) has at least one superheating stage (14a, b) for obtaining a respective superheated output steam stream (15a, b) from a respective input steam stream (16a, b), which input steam stream (16a, b) is conducted through the steam heater (13) until the superheated output steam stream (15a, b) is obtained, and wherein the plant (2) includes a turbine arrangement (12) for generating electrical power, which turbine arrangement (12) is driven by at least one superheated output steam stream (15a, b), characterized in that the at least one superheating stage (14a, b) has at least two heating sections (17) in each case, which heating sections (17) are guided through an inner region (18) of the steam heater (13), in which inner region (18) the heating sections (17) are heated by a burner (19) of the steam heater (13), in that the at least one superheating stage (14a, b) has a quench section (20) which is arranged between the at least two heating sections (17) in terms of process technology, in which quench section (20) steam obtained in

A superheated steam generator in which the amount of generated steam is controlled by the amount of electric power includes: a steam generation unit that generates steam from water by inductively heating a first conductor pipe having a spiral shape; a superheated steam generation unit that generates superheated steam by inductively heating a second conductor pipe having a spiral shape; a control unit that controls an amount of steam to be generated by the steam generation unit based on an amount of electric power to be supplied to the steam generation unit; and a safety device that prevents damage to the steam generation unit or the superheated steam generation unit based on a water pressure in the steam generation unit, a pressure or a temperature of the steam in the steam generation unit, or a pressure or a temperature of the superheated steam in the superheated steam generation unit.

This application discloses a bypass steam supply system control method and steam supply system, including: when the main steam supply system of a cogeneration unit is in an abnormal state, entering a bypass steam supply state; opening the high-pressure bypass pressure regulating valve to control the reheat steam pressure; opening the high-pressure bypass water spray desuperheating regulating valve group to control the high-pressure bypass outlet steam temperature; reducing boiler power; closing all low-pressure steam supply valve groups; when the high-pressure steam supply pressure exceeds a preset abnormal high-pressure threshold, opening the low-pressure bypass pressure regulating valve group until the high-pressure steam supply pressure is lower than or equal to a preset normal high-pressure threshold; opening the high-pressure to low-pressure emergency connection steam supply regulating valve group to control the emergency low-pressure steam supply pressure and emergency low-pressure steam supply temperature. This application additionally adds a bypass steam supply PID automatic control loop for the bypass steam supply state, which can realize fully automatic control and continue to provide two-stage industrial steam supply under shutdown-but-uninterrupted boiler operation conditions, improving safety and stability.

The embodiment of the invention provides a cooling and heat supply system for superheated steam and a control method of the cooling and heat supply system. The cooling and heat supply system comprises a heat source, a heat supply network heater, a cooling assembly, a detection assembly and a controller. The heat source is used for providing superheated steam. The heating network heater communicates with a heat source through a steam pipeline. And the cooling assembly is arranged between the heat source and the heating network heater, is used for cooling the superheated steam and comprises a control valve. The detection assembly is arranged between the cooling assembly and the heating network heater and used for detecting working parameters of the steam pipeline. The controller is connected with the detection assembly and the control valve, and the controller controls the operation parameters of the cooling assembly according to the working parameters so as to cool the superheated steam to saturated steam or slightly superheated steam.

The invention discloses a boiler steam temperature control method and device, electronic equipment and a storage medium, and relates to the technical field of industrial process control. A dynamic response model of a combustion working condition and a steam temperature is built based on boiler real-time operation parameters, adaptive parameters are determined in combination with a load instruction trend and historical working conditions, and the control accuracy is improved. The nonlinear characteristics of the attemperation water adjusting mechanism are accurately identified, a compensation control instruction is generated, and multiple strong nonlinear dynamic characteristics of the boiler are fully adapted, so that the problems that the existing PID control adopts a linear feedback model, the strong nonlinear dynamic characteristics of the boiler are not considered, and the control precision is low can be solved. The method solves the technical problems of non-linear interval control mismatch, steady-state deviation, dynamic overshoot / undershoot and large steam temperature fluctuation of the desuperheating water adjusting mechanism due to the fact that the temperature of the circulating fluidized bed boiler is low, and the technical effects of improving the steam temperature control precision and stability of the circulating fluidized bed boiler, eliminating the steam temperature fluctuation and guaranteeing the operation economy and safety of a unit are achieved.

This utility model relates to the field of steam system technology, and is a device for replacing deoxygenated water in a steam desuperheater with condensate. It includes: a high-pressure steam supply unit, a medium- and low-pressure steam supply unit, a desuperheater, and a condensate tank. The high-pressure steam supply unit takes high-pressure steam as input, and its output ends are connected to both the desuperheater and the condensate tank. The high-pressure condensate output from the high-pressure steam supply unit is input to either the desuperheater or the condensate tank. The medium- and low-pressure steam supply unit is connected to the desuperheater at one end and to the condensate tank at the other end. The medium- and low-pressure steam supply unit takes medium- and low-pressure steam that has passed through the desuperheater as input and inputs the output low-pressure condensate to the condensate tank. This utility model designs and installs a condensate delivery pipeline to directly introduce high-pressure steam condensate into the medium / low-pressure steam desuperheater, and modifies the control system of the steam desuperheater to adapt to the physical characteristics of the condensate.