36 results about "Boiler feedwater pump" patented technology

The utility model belongs to the technical field of dry quenching waste heat power generation, and particularly relates to a dry quenching waste heat power generation deoxygenization water supply system. Comprising EDI (electrodeionization) equipment, a steam extraction condensing steam turbine or a pure condensing steam turbine, a condenser, a condensate pump, a demineralized water tank of a dry quenching boiler water supply pump station, a deoxygenization water supply pump, a deoxygenization water supply regulating valve group, a three-way valve, a water-water heat exchanger, a water supply preheater and a thermal deaerator. The utility model has the beneficial effects that a desalting water tank and a secondary desalting water pump of a desalting water station are omitted; the fixed pressure difference of the regulating valve is used as main regulation, and the three-way valve is used as auxiliary regulation to ensure normal operation of sampling equipment; after deoxygenated water supply is heated by the water-water heat exchanger, one part of sewage is fed into the dry quenching body circulating water tank for normal production, and the other part of sewage is fed back to a sewage discharge well, so that the temperature of the sewage is reduced, heat and water resources are fully utilized, and meanwhile, the adverse effect of white smoke generated by sewage discharge on a drainage system and the environment is eliminated.

This utility model discloses an energy-saving device for nitric acid recovery, including a demineralized water preheater. The outlet of the demineralized water preheater is connected to the inlet of a second demineralized water heater, and the outlet of the second demineralized water heater is connected to the inlet of a nitrogen oxide cooler. It also includes a nitrogen oxide compressor, the outlet of which is connected to the inlet of a first demineralized water heater, and the outlet of the first demineralized water heater is connected to the inlet of a rapid cooler. Furthermore, it includes a demineralized water boiler feed pump, the outlet of which is also connected to the inlet of the first demineralized water heater, the outlet of the first demineralized water heater, and the outlet of the second demineralized water heater, which is also connected to the inlet of the demineralized water preheater. Compared to existing technologies, this utility model adds two demineralized water heaters, recovering heat from nitrogen oxides through demineralized water, reducing the amount of circulating water used, and simultaneously reducing the amount of steam used in the steam drum.

The utility model relates to a bearing frame structure for boiler feed water pump, the bearing frame structure includes: bearing frame body, bearing frame cover, bearing frame end frame and reinforcing rib board, bearing frame body and bearing frame cover are welded together, bearing frame end frame and bearing frame body are welded together, reinforcing rib board and bearing frame end frame, bearing frame body are welded together, and after bearing frame body and bearing frame cover are welded, form a closed cavity between the two, the bearing frame body is provided with cooling water inlet hole and cooling water outlet hole, and cooling water inlet hole and cooling water outlet hole are communicated with the closed cavity and the outside. The bearing frame structure for boiler feed water pump provided by the utility model can not only meet the needs of structure and strength, but also can play the role of pressure relief, cooling and the like.

The invention relates to the field of high-pressure boiler feed pumps, and particularly discloses an energy-saving balanced type high-pressure boiler feed pump which comprises a pump body, a pump shaft, a tail cover and a bearing cover, the pump body is provided with a liquid inlet section and a liquid outlet section, the pump shaft is provided with a plurality of impellers, and the pump shaft is provided with a synchronous barrel abutting against the back faces of the impellers close to the non-driving end. A coarse adjustment plate is fixedly connected to the synchronous cylinder, a throttling gap is reserved between the coarse adjustment plate and the pump body, a fine adjustment plate is arranged on the peripheral wall of the coarse adjustment plate, a fine balance cavity is reserved between the back face of the fine adjustment plate and the pump body, and a control mechanism used for controlling hydraulic pressure of the fine balance cavity is arranged in the pump body. A separation mechanism used for separating the coarse balance cavity and the fine balance cavity is arranged in the pump body, and a supply mechanism used for supplying balance liquid into the coarse balance cavity is arranged on the pump body. The pump has the advantages that the axial thrust is balanced, the pump shaft does not need to axially float, the stability is high, and the rough adjustment plate and the fine adjustment plate cannot be abraded.

The present invention relates to the technical field of heat energy utilization, and in particular to a process and device for utilizing heat energy in sulfuric acid production. In the process for utilizing heat energy in sulfuric acid production, a first heat exchanger and / or a second heat exchanger and / or a third heat exchanger are additionally arranged in a sulfuric acid production process. The first heat exchanger heats air entering a sulfur incinerator, and high-temperature heat in flue gas is transferred into a steam system in a waste heat boiler to generate medium-pressure steam and high-pressure steam. The second heat exchanger heats flue gas from an HRS tower, and the heated flue gas enters a cold-hot heat exchanger for heat exchange with flue gas from an outlet of a third section of a converter to further increase the temperature, so as to meet process requirements. The third heat exchanger heats boiler feed water from a boiler feed water pump, the boiler feed water then enters an economizer 3A and / or an economizer 4B, and this portion of heat added by the boiler feed water is used for generating medium-pressure steam and high-pressure steam. Compared with the prior art, three heat exchangers are added, and are flexibly configured on the basis of different use scenarios and objects, significantly improving the yield of medium-pressure steam and high-pressure steam.

The present application belongs to the technical field of dry quenching waste heat power generation, and particularly relates to a dry quenching waste heat power generation oxygen removal feedwater system and a regulating method thereof, comprising an EDI electric desalination device, an extraction condensing steam turbine or a pure condensing steam turbine, a condenser, a condensate pump, a dry quenching boiler feedwater pump station desalination water tank, an oxygen removal feedwater pump, an oxygen removal feedwater regulating valve group, a three-way valve, a water-water heat exchanger, a feedwater preheater and a thermal deaerator. The present application has the beneficial effects that the desalination water tank and the secondary desalination water pump of the desalination water station are saved; the fixed pressure difference of the regulating valve is used as the main regulation, and the three-way valve is used as the secondary regulation, so that the normal operation of the sampling device is ensured; after the blowdown water is heated by the water-water heat exchanger to oxygen removal feedwater, part of the oxygen removal feedwater is sent into the dry quenching body circulating water tank for normal production, and the other part of the oxygen removal feedwater is sent back to the blowdown well to reduce the blowdown water temperature, so that the heat and water resources are fully utilized, and the adverse effects of the "white smoke" generated by blowdown on the drainage system and the environment are eliminated.

The utility model discloses a novel no-load running check valve, belongs to the technical field of boiler feed pump self-circulation, and aims to solve the problems of a traditional no-load running check valve. The check valve comprises a first valve body which is in a four-way shape, a lower opening of the first valve body is a main path inlet, an upper opening of the first valve body is a main path outlet, a left opening of the first valve body is an inlet side bypass, a right opening of the first valve body is an outlet side bypass, a throttling sleeve is connected with the inlet side bypass in a sealed mode, and a main valve element rod and the throttling sleeve are matched with a plurality of sealing convex rings through a plurality of bypass sealing flanges. The main path valve clack assembly is in sliding fit with the throttling sleeve and is in sliding sealing with the main valve element rod, the crank seat is in sealing fit with the outlet side bypass, a plurality of crank bodies are hinged to the crank seat, the second spring pushes the main path valve clack assembly leftwards through the crank bodies, and the throttling assembly is arranged in the outlet side bypass. The design of the outlet side bypass is added, the use function of the valve is increased, and the outlet side bypass can be used as a preheating pipeline or a backflow pipeline.

The present application relates to the technical field of boiler feed water pump cavitation control, and discloses a self-adaptive adjustment method and system for preventing cavitation of a boiler feed water pump, which acquires the inlet pressure, inlet water temperature and feed water flow of the pump in real time, calculates the effective net positive suction head NPSHa and looks up the required net positive suction head NPSHr, calculates the margin coefficient and makes a judgment, and drives the frequency converter and the inlet regulating valve to adjust in coordination according to the judgment result. The system comprises a parameter acquisition unit, a self-adaptive controller, an actuator and a man-machine interaction unit. The present application can effectively prevent cavitation from occurring and reduce the energy consumption of the feed water pump by real-time dynamic calculation and coordinated adjustment of the net positive suction head, and can adapt to the nonlinear pressure variation characteristics of sliding pressure operation, and balance the rapidity of cavitation protection and the economy of operation.

The utility model relates to the technical field of boiler water supply, in particular to a boiler water supply pressure stabilizing device which comprises a fixing seat and a boiler water supply pump, a carbon steel pressure stabilizing tank is fixedly connected to the inner wall face of the fixing seat, and a water inlet pipe is fixedly installed on the upper portion of the outer surface of the boiler water supply pump in a penetrating mode. An input pipe is fixedly installed in the middle of the right end of the boiler water feeding pump in a penetrating mode, the right end of the input pipe is fixedly connected with the lower portion of the left end of the carbon steel surge tank in a penetrating mode, a check valve is movably installed on the right portion of the outer surface of the input pipe in a penetrating mode, and a water feeding pressure stabilizing set is fixedly connected to the middle of the inner wall face of the carbon steel surge tank. According to the boiler water supply pressure stabilizing device, the carbon steel pressure stabilizing tank and the water supply pressure stabilizing set inside the carbon steel pressure stabilizing tank are arranged, water flow entering the device is buffered and adjusted in a multiple mode, the water flow is decelerated and dispersed in sequence, the flow direction of the water flow is changed, the water flow is more stable in the carbon steel pressure stabilizing tank, impact and fluctuation of the water flow are effectively reduced, and the service life of the water supply pressure stabilizing device is prolonged. Therefore, the pressure output to the boiler water supply pipe network is stabilized.

The invention relates to a dry quenching mother tube type boiler system, in particular to a dry quenching mother tube type boiler system and a control method thereof, which are used for controlling the dry quenching mother tube type boiler system. Comprising the steps of monitoring the state of a feed pump in the system to obtain monitoring information; judging the shutdown number of the feed pump according to the monitoring information; and the dry quenching main tube type boiler system is regulated and controlled according to the shutdown number of the water feeding pumps. The automatic interlocking coke discharging device can automatically interlock to stop coke discharging operation after the shutdown of a boiler feed pump is automatically detected, solves the problem of manual coke discharging operation stopping, reduces circulating air volume and improves boiler feed water quantity through automatic interlocking, balances the relation between evaporation capacity and feed water quantity at the lowest operation load, realizes low-load operation, automatically interlocks nitrogen filling and reduces air introduction quantity, and improves the coke discharging efficiency. It is guaranteed that combustible components in the dry quenching furnace are within the control range, and the operation safety risk of the boiler is effectively solved.

The invention relates to the technical field of power pumps, in particular to a limiting device for preventing a rotor of a boiler feed pump from moving. When the boiler feed pump is started, the elastic piece pushes the rotor to enable a gap to be formed between the balance disc and the balance seat sleeve, and when the shaft drives the rotor to rotate at a low speed, the elastic piece pushes the rotor to enable the balance disc and the balance seat sleeve to rotate at a low speed. When the rotating speed of the rotor rises and the generated axial force is larger than the elastic force applied by the elastic piece, the balance disc moves, redundant axial force is counteracted through the pressure difference between the two sides of the balance disc, and at the moment, pressure between the balance disc and the balance seat sleeve is generated. Therefore, the balance disc is not contacted with the balance seat sleeve, and the possibility of abrasion of the balance disc is reduced.

The utility model belongs to the technical field of feed pumps, in particular to a boiler feed pump with a start-stop device, which aims at solving the problem of maintenance and comprises a base. A mounting hole is formed in the outer surface of the base; a sliding groove is formed in the upper surface of the base. A threaded rod is rotationally mounted on the inner surface of the base; guide rods are fixedly connected to the two sides of the inner surface of the base; a first motor is fixedly connected to the outer surface of one side of the base. A sliding block is installed on the inner surface of the sliding groove in a sliding mode. A guide thread groove is formed in the outer surface of the sliding block; sliding holes are formed in the two sides of the outer surface of the sliding block. And through the arrangement of the base and the sliding block, the water pump body can be moved under the condition that the base is not detached, the water pump body is more convenient to maintain, and the efficiency is improved.

The utility model provides a header system boiler feed pump device, which relates to the technical field of power plant water supply devices, and comprises a plurality of water supply pipelines of feed pumps connected in parallel to a header pipe, the header pipe is connected with corresponding economizer assemblies through a plurality of branch pipes, and outlets of the economizer assemblies are connected with a steam pocket; a steam pocket pressure sensor is arranged at the top of the steam pocket; a water supply mother pipe pressure sensor is arranged on the mother pipe; the steam pocket pressure sensor and the water mother pipe pressure sensor are connected with the input end of the control assembly, and the output end of the control assembly is connected with the frequency converter. The technical problems that in the prior art, due to the fact that water feeding pumps are mutually independent, a water feeding adjusting door acts frequently, and energy is consumed are solved, frequent action of a valve is avoided, and throttling loss of the valve is reduced; the technical effects that multi-pump cooperative operation is achieved, and the main pipe pressure is stable when the water level of each steam pocket is independently adjusted are ensured.

The utility model relates to an arrangement system for large and medium-sized dry quenching waste heat utilization, which is characterized in that a dry quenching furnace, a primary dust remover, a dry quenching waste heat boiler, a connecting flue, a secondary dust remover, a circulating fan and a water supply preheater are annularly arranged, the dry quenching waste heat boiler and a boiler water supply pump station system are arranged in a combined manner, the outlet of the dry quenching waste heat boiler is raised, and the outlet of the secondary dust remover is raised. A boiler water supply pump station system is arranged between the bottom of an outlet of the improved coke dry quenching waste heat boiler and the ground, a desalting water tank is arranged on the ground beside the boiler water supply pump station system, sampling equipment is arranged beside the outlet of the coke dry quenching waste heat boiler, and a deaerator is arranged beside the lower portion of the coke dry quenching waste heat boiler. The dry quenching waste heat boiler waste heat recycling system has the advantages that the occupied area of a boiler water supply pump station system and the building structure cost can be saved, the dry quenching waste heat boiler waste heat recycling structure is more compact, the occupied area is small, the building workload is saved, and the building cost is reduced.

This utility model belongs to the field of boiler feedwater pumps, and in particular, a heat-insulated boiler feedwater pump motor. It includes a feedwater pump housing for supplying water to a heat-insulated boiler, a motor, and a fixing mechanism. An impeller shaft is rotatably connected inside the feedwater pump housing. The output end of the motor is connected to one end of the impeller shaft through the fixing mechanism. The fixing mechanism includes rectangular blocks, a connecting rod, U-shaped locking blocks, a limiting block, and a limiting rod. Rectangular blocks are fixedly connected to both the output end of the motor and one end of the impeller shaft. A common connecting rod is inserted into one end of each of the two rectangular blocks. Two U-shaped locking blocks are slidably connected to the connecting rod, and each U-shaped locking block engages with one of the two rectangular blocks. This utility model allows for rapid assembly and disassembly of the motor and impeller shaft through its various components, significantly reducing equipment repair time and improving convenience and efficiency.

The invention discloses a silicon smelting flue gas recycling system and method, and relates to the technical field of waste heat recovery. The silicon smelting flue gas recycling system comprises a waste heat boiler, a flue gas cleaning unit, a heat exchanger, a dust removal fan, a power generation unit, a carbon dioxide trapping unit and a boiler water feeding pump, the silicon submerged arc furnace is connected with the waste heat boiler through a pipeline, the waste heat boiler is connected with the power generation unit and the flue gas cleaning unit through pipelines, the flue gas cleaning unit is connected with the carbon dioxide capturing unit through a pipeline, and a heat exchanger is arranged between the flue gas cleaning unit and the carbon dioxide capturing unit. A dust removal fan is arranged between the heat exchanger and the carbon dioxide capturing unit, the boiler feed pump is connected with the heat exchanger through a pipeline, the heat exchanger is further connected with the waste heat boiler through a pipeline, and the dust removal fan is connected with the power generation unit; the power generation unit comprises a steam turbine, a generator and a transmission control unit, and the steam turbine, the generator and the dust removal fan are coaxially arranged through the transmission control unit.

The utility model relates to the technical field of power pumps, in particular to an efficient and energy-saving boiler feed pump which comprises a supporting base, one side of the top of the supporting base is connected with a generator through a mounting seat, the output end of the generator is connected with a coupler, one side of the top of the supporting base is connected with a pump body through a bearing frame, and the pump body is connected with a water pump. The end of the coupler is fixedly connected with a pump shaft, and the end of the pump shaft extends into the pump body and is fixedly connected with an impeller. When the boiler feed pump operates, after water flow is accelerated by the impeller, vortex is formed under the guidance of the turbine blades by arranging the turbine blades, the micro turbine is driven to operate, and the generator is driven to convert originally lost vortex energy into electric energy. The electric energy can be directly supplied to pump body auxiliary equipment, dependence of the pump body on external energy is greatly reduced, energy consumption of the whole boiler feed pump is reduced, and efficient energy conservation and emission reduction of the boiler feed pump are achieved.

The utility model provides an oil well heating system. The oil well heating system comprises a steam boiler, a mixer and a hot water injection device which are sequentially connected in series. The steam boiler is connected with the softened water tank through a boiler feed pump; the steam boiler is further connected with an air blower and a fuel supply box. The mixer is also connected with a well bottom produced liquid storage device through a liquid transfer pump; a Y-shaped filter is further arranged between the liquid transfer pump and the well bottom produced liquid storage device; the hot water injection device is arranged in the oil well. According to the system, the oil well is heated by using the device, the defects that the steam consumption is large and the energy consumption is high due to the fact that steam is easy to escape in a steam heating mode are overcome, and the beneficial effects of being high in temperature rising speed and uniform in heating are further achieved due to the fact that hot water is adopted for heating due to the characteristic of liquidity of liquid.

The utility model relates to a novel steam-electricity combined dragging device, and belongs to application of steam turbine dragging transmission equipment. The device comprises a steam turbine, a feed pump, a motor, a first coupler and a second coupler, the feed pump adopts a lengthened pump shaft, the motor is connected with the feed pump through the first coupler, and the feed pump is connected with the steam turbine through the second coupler. The whole structural design is reasonable, the operation safety of the boiler feed pump can be greatly improved through transformation, the risk is reduced, meanwhile, the flow of an original gas-making low-pressure steam pipe network is automatically compensated, operation is simplified, the steam utilization rate is increased, and the use requirement is met.

The utility model belongs to a kind of desalted water system using synthetic ammonia system low-grade waste heat;Including gasification black water feed pipe in synthetic ammonia system, shift gas pipeline;Desalted water pipeline is connected with first stream separator, and the first outlet of first stream separator is connected with deaerator inlet through the first heat exchange passage of first heat exchanger, and the second outlet of first stream separator is connected with deaerator inlet through the first heat exchange passage of second heat exchanger, and deaerator first outlet is connected with first boiler feed water pump, and deaerator second outlet is connected with the first heat exchange passage of third heat exchanger through first desalted water closed cycle part;Shift gas pipeline is connected with circulating water cooler inlet through the second heat exchange passage of third heat exchanger and the second heat exchange passage of second heat exchanger, and the outlet of circulating water cooler is connected with ammonia washing tower;With process design reasonable, can effectively reduce the use amount of circulating cooling water, simultaneously realize the characteristics of full use of heat energy.

The invention relates to a combined waste heat power generation system with a back pressure steam turbine connected in series with a condensing steam turbine. The problem that low-pressure dead steam exhausted by a single steam turbine power generation system is still rich in higher latent heat energy and cannot be fully utilized is solved. Comprising high-temperature flue gas (1), a back pressure steam turbine (2), a back pressure generator (3), a condensing steam turbine (4), a condensing generator (5), a condensing condenser and hot well (6), a condensing power generation cooling circulation water tower (7), a cooling circulation water pool (8), a cooling circulation water pump (9), a boiler water feeding pump (10), a deaerator (11), a coal economizer (12), a flue gas waste heat boiler (13), a steam pocket (14) and a flue gas superheater (15). According to the system, sensible heat energy of water vapor is more fully recycled, latent heat energy of dead steam condensation is further recycled, the sensible heat energy of the steam is efficiently utilized, steam condensate water is recycled, and multiple configuration combinations of grid-connected or isolated-grid operation of the two waste heat power generation systems are flexibly created.

The mechanical sealing device comprises a pump body and a motor, a penetrating hole is formed in the side, close to the driving motor, of the pump body, a sealing cylinder is fixedly connected to the side, close to the penetrating hole, of the outer side wall of the pump body, and the output end of the motor is fixedly connected with a driving shaft penetrating through the sealing cylinder and the penetrating hole. A static ring is arranged on the side, away from the pump body, of the inner side wall of the sealing cylinder, an opening is formed in the end, away from the pump body, of the sealing cylinder, and a connecting ring matched with the opening is fixedly connected to the side, close to the opening, of the outer side wall of the driving shaft. Through cooperation of the pump body, the motor, the penetrating hole, the sealing cylinder, the driving shaft, the static ring, the opening, the connecting ring, the spring, the moving ring and the heat dissipation assembly, the temperature of the moving ring, the static ring and the spring is reduced when the pump body is used, and the situation that the service life of the moving ring, the static ring and the spring is affected by high temperature and the overall service life of the mechanical sealing device is affected is further avoided as much as possible.

The invention discloses a boiler feed pump lubricating oil system based on state real-time perception and a regulation and control method, and belongs to the technical field of thermal power plant auxiliary equipment. The problems that due to extensive control, single state monitoring and passive maintenance strategies, an existing boiler feed pump lubricating oil system is high in energy consumption, insufficient in early warning capacity and poor in operation reliability are solved. The system comprises a basic assembly and an intelligent regulation and control assembly. The basic assembly serves as an execution unit of the lubricating oil system and is used for achieving supply, filtering and temperature control of lubricating oil. The intelligent regulation and control assembly serves as a sensing and decision-making unit of the lubricating oil system, senses the running state, oil quality parameters and the running state of a water feeding pump of the basic assembly in real time through a multi-dimensional sensor network, and generates a regulation and control instruction through a built-in intelligent algorithm and an evaluation model. And closed-loop optimization control is carried out on a key execution mechanism in the basic assembly, so that the lubricating oil system forms an intelligent lubricating whole capable of self-adapting to the operation working condition. The invention is used for the boiler feed pump unit.

The utility model relates to the technical field of boiler water supply systems, in particular to a boiler water supply pump anti-cavitation device which comprises a main body, two ends of the main body are fixedly connected with a conveying pipe and a discharge pipe assembly respectively, the top of the main body is fixedly connected with a water conveying pipeline, and a water conveying cavity and a first sleeve which are connected in a matched mode are arranged in the main body. A pipeline connected with the first sleeve is transversely arranged in the main body; and the pipeline is simultaneously connected with the conveying pipe and the discharge pipe assembly. The effect of conveying a cooling water source into the water conveying cavity is achieved through the water conveying pipeline, the effect of conveying the cooling water source into the inner sleeve is achieved through cooperation of the water conveying cavity and the first sleeve, and the effect of cooling the high-temperature water source in the pipeline is achieved through the inner sleeve; and the effect that the cooling water sources at the two ends of the inner sleeve can be rapidly discharged outwards at the same time is achieved through the circulating pipe.

The invention relates to the technical field of boiler feed pump machines, and discloses a boiler feed pump machine seal flushing and cooling system with regulation and compensation performance. The heat exchanger is provided with a flushing water side and a cooling water side; a cooling water regulating valve; a flushing water inlet pipeline; a flushing water return pipeline; the primary thermodetector is arranged on the flushing water return pipeline; the steam exhaust valve is arranged on the flushing water return pipeline and is positioned at the downstream of the primary thermodetector, and an outlet of the steam exhaust valve is connected to the pollution discharge collector; and the secondary thermodetector is arranged on the flushing water inlet pipeline. The heat exchanger with the adjustable heat exchange area is adopted, the cooling effect can be adjusted in real time according to changes of mechanical seal heat loads, the problems that the heat exchanger is fixed in area and cannot adapt to working condition fluctuation are effectively solved, it is ensured that the water temperature of an outlet of the cooler is always lower than a vaporization point, and the phenomena of mechanical seal cavity flash evaporation and cavitation are thoroughly eliminated; and the reliability and the service life of the mechanical seal are obviously improved.

The utility model discloses a closed recovery system for steam condensate. The closed recovery system comprises a recovery tank and a softened water tank, a condensate return pipe, a first blow-down pipe and a pressure relief pipe are connected to the top of the recovery tank, a safety valve is arranged on the first blow-down pipe, a first electric valve is arranged at the end, close to the recovery tank, of the pressure relief pipe, and the softened water tank is connected to the end, away from the recovery tank, of the pressure relief pipe; the bottom of the recycling tank is connected with a condensate recycling pipe and a discharging pipe, the condensate recycling pipe is provided with a boiler water feeding pump so as to supply recycled water to the boiler, the discharging pipe is provided with a discharging valve, and the recycling tank is further provided with a first liquid level meter; the lower portion of the softened water tank is connected with a water supplementing pipe, the other end of the water supplementing pipe is connected to the top of the recycling tank, and a water supplementing pump is arranged on the water supplementing pipe. The steam condensate closed recovery system provided by the utility model can automatically adjust and control water balance in the recovery tank, so that the problem that a water feeding pump of a boiler is easy to generate a cavitation phenomenon is solved.

The invention relates to the technical field of intelligent operation and maintenance and optimization control of a dry quenching boiler, and discloses an intelligent prediction and management method for tube explosion of a dry quenching boiler based on multi-parameter collaboration. According to the method, priority abnormal parameter characteristics of different pipe explosion types are found for the first time, header light pipe explosion takes boiler inlet and outlet gas temperature, boiler pressure and air conduction flow as priority abnormal parameters, and economizer pipe explosion takes hydrogen concentration, air introduction amount and boiler feed pump temperature as priority abnormal parameters; and a double-layer feature system of'priority abnormal parameter-associated collaborative parameter 'is constructed, and precise identification and early warning of pipe explosion types are realized in combination with a machine learning algorithm. And a decision basis is provided for optimized operation and safety guarantee of a coke dry quenching boiler control system. The problems that in the prior art, early warning blindness is high due to the fact that early warning only depends on single parameter early warning, pipe explosion types cannot be distinguished, early recognition precision is low, and therefore accurate and differentiated emergency disposal and maintenance decision bases cannot be provided for field personnel are solved.

The invention relates to the technical field of dry quenching waste heat utilization, in particular to a control system and a control method for an explosion-proof pipe of a dry quenching boiler superheater, the control system for the explosion-proof pipe of the dry quenching boiler superheater is characterized in that a desalting water tank 1, an ammonia liquid adding pipeline mixer 13, a deoxidizing water feeding pump 2, a deaerator 3, a boiler water feeding pump 4 and a steam pocket 5 are sequentially connected through a pipeline; the steam pocket 5, the primary superheater 6, the water spraying desuperheater 7 and the secondary superheater 8 are sequentially connected through pipelines; the control method comprises the following steps: chlorine content control; controlling the pH value; and controlling priority setting. The method has the advantages that a multi-point and multi-parameter real-time corrosion monitoring system is constructed by arranging the chlorine meter and combining the pH monitoring of the demineralized water, so that the early recognition and source control of the chlorine corrosion risk are realized; the PLC control cabinet is adopted to process chlorine meter and pH meter signals in a centralized mode, the ammonia adding device is controlled to be started and stopped according to preset logic, closed-loop control of'monitoring-judgment-execution-feedback 'is formed, and timeliness and accuracy of water quality adjustment are improved.

A process for utilizing heat energy from sulfuric acid production. A first heat exchanger (1-1) and / or a second heat exchanger (2-1) and / or a third heat exchanger (3-1) are additionally provided in a sulfuric acid production process, wherein the first heat exchanger (1-1) heats air that enters a sulfur burner, and transfers high-temperature heat in flue gas to a steam system in a waste heat boiler to generate medium- and high-pressure steam; the second heat exchanger (2-1) heats the flue gas that comes out from an HRS tower, and the heated flue gas enters a cold-to-hot heat exchanger for heat exchange with flue gas from a third section of a converter and is thus further heated to meet process requirements; and the third heat exchanger (3-1) heats boiler feed water from a boiler feed water pump, the heated boiler feed water then enters an economizer 3A and / or economizer 4B, and the heat added by the boiler feed water is used to generate medium- and high-pressure steam. Compared with the prior art, three heat exchangers are additionally provided, and flexible configurations are utilized on the basis of different usage scenarios and objects, thereby significantly improving the yield of medium- and high-pressure steam.

The utility model relates to the technical field of flow regulating valves, in particular to a boiler feed pump recirculation valve which comprises a recirculation valve body and an anti-backflow buffer mechanism. The recirculation valve body comprises a valve element and a shell, and a medium channel is formed between the valve element and the shell. The direction, facing the second valve cage, of the first valve cage is set as a preset direction; the anti-backflow buffer mechanism is arranged in the second valve cage; the anti-backflow buffer mechanism comprises a medium buffer frame; the medium buffering frame is arranged in the second valve cage, and a buffering gap is formed between the medium buffering frame and the second valve cage; the medium buffer frame can be communicated with or separated from the medium channel; a plurality of medium outflow holes are formed in the bottom wall of the second valve cage. The boiler feed pump recirculation valve is ingenious in structural design, high-pressure water can be prevented from flowing back from the deaerator when flowing back to the deaerator from the pump outlet, meanwhile, the boiler feed pump recirculation valve can buffer media at the outlet of the valve cage, the flow speed of the media at the outlet of the valve cage is further reduced, and the service life of the boiler feed pump is prolonged. And the erosion resistance is further improved.