CN213147455U - Water supplementing and atomizing system for steam turbine condenser of thermoelectric unit - Google Patents

Abstract

The utility model discloses a thermoelectric unit steam turbine condenser moisturizing atomizing system, adopt the main pipe of replenishing water supply and moisturizing branch pipe to form into the water structure, the water outlet end of the main pipe of replenishing water supply sets up a plurality of moisturizing branch pipes arranged in parallel, the delivery port of the moisturizing branch pipe is equipped with the branch main pipe arranged perpendicular to the moisturizing branch pipe, the both ends of the branch main pipe are equipped with two branch pipes arranged in parallel, one side of the two branch pipes opposite is equipped with a plurality of atomizing nozzles, the branch main pipe connected with the two branch pipes is arranged in H-type and the atomizing nozzle arranged oppositely, the atomizing gas relative injection blocks the back scattering, improve the fog dispersion movement, after the replenishing water is atomized at the throat position, the heat exchange is fully carried out with the steam turbine exhaust steam exhausted from above, absorb the latent heat of the exhaust steam, the temperature of the replenishing water is raised to the saturation temperature to separate out dissolved oxygen, the oxygen content of condensed water is reduced, the sufficient heat exchange speed of the supplementing water and the exhaust steam is high, the vacuum degree is improved, and the supercooling degree of the condensed water is reduced.

Description

Water supplementing and atomizing system for steam turbine condenser of thermoelectric unit

Technical Field

The utility model belongs to steam turbine condenser heat transfer system of steam power plant, concretely relates to steam turbine condenser moisturizing atomizing system of thermoelectric unit.

Background

At present, chemical demineralized water needs to be supplemented when most steam turbines of the thermal power plant in China are operated, and at present, part of water supplementing systems supplement original water to deaerators to condensers instead, so that the production efficiency of the whole plant is improved, and the steam exhaust loss of units is reduced. The thermoelectric unit has the hydrosol oxygen volume of condensing to be on the high side and the backpressure is on the high side at the operation in-process, and the phenomenon that the vacuum degree is too low, though with make-up water with the direct compensation form after filling in condenser/exhaust apparatus, can improve certain thermal efficiency and reduce some steam extraction loss, nevertheless with the make-up water that the direct compensation form got into condenser/exhaust apparatus not fully with steam turbine exhaust contact, the heat of not fully absorbing the steam extraction, the cooling absorption efficiency is low to heat absorption efficiency has been reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a thermoelectric unit steam turbine condenser moisturizing atomizing system to overcome the not enough of prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a steam condenser water-replenishing atomization system of a steam turbine of a thermoelectric unit comprises a main water-replenishing supply pipe and a branch water-replenishing supply pipe, wherein one end of the main water-replenishing supply pipe is arranged in the steam condenser, and the other end of the main water-replenishing supply pipe is connected to a water-replenishing source; the water outlet end of the main water supply pipe is provided with a plurality of water supply branch pipes which are arranged in parallel, the water outlet of each water supply branch pipe is provided with a branch main pipe which is perpendicular to the water supply branch pipes, two branch pipes which are arranged in parallel are arranged at two ends of the branch main pipe, and a plurality of atomizing nozzles are arranged on one opposite side of the two branch pipes.

Furthermore, a flow meter and a flow-limiting control valve are arranged on the main replenishing water supply pipe.

Furthermore, the branch main pipe is connected with the pipeline in the condenser through a hoop.

Furthermore, the atomizing nozzle adopts a three-way cooling spraying structure.

Furthermore, the branch pipes are reducer pipes, and the pipe diameters of the joints of the branch pipes and the branch main pipes are larger than those of the two ends of the branch pipes.

Furthermore, the nozzle of the atomizing nozzle at the uppermost end on the branch pipe is inclined downwards.

Furthermore, the included angle between the axis of the atomizing nozzle and the horizontal direction is 15 degrees.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model relates to a steam turbine condenser water-replenishing atomization system of a thermoelectric unit, which adopts a main water-replenishing supply pipe and a branch water-replenishing supply pipe to form a water inlet structure, wherein one end of the main water-replenishing supply pipe is arranged in the steam condenser, and the other end is connected with a water-replenishing source; the water outlet end of the main supply pipe is provided with a plurality of parallel water replenishing branch pipes, the water outlets of the water replenishing branch pipes are provided with branch main pipes which are perpendicular to the water replenishing branch pipes, two parallel branch pipes are arranged at two ends of the branch main pipes, a plurality of atomizing nozzles are arranged at opposite sides of the two branch main pipes, the two branch main pipes connected with the two branch main pipes are arranged in an H shape, the atomizing nozzles arranged oppositely are used for improving the atomizing and scattering area, the atomizing nozzles arranged oppositely are used for atomizing and blocking the atomized gas to scatter, so that the dispersion motion of the mist is improved, after the water is atomized at the throat position, the water is fully subjected to heat exchange with the steam exhaust steam of the steam turbine exhausted from the upper part, the latent heat of the steam is absorbed, the self temperature of the water is increased to reach the saturation temperature to precipitate dissolved oxygen, the content of the condensed water dissolved oxygen is, the vacuum degree is improved, and the supercooling degree of the condensed water is reduced.

The steam condenser has the advantages that the atomization contact heat exchange mode and the steam exhaust are adopted for heat exchange and heat exchange cooling steam exhaust, after chemical make-up water is supplemented into the steam condenser, the contact area between the atomized steam and the steam exhaust is increased to the maximum extent, most of cold source loss of the steam exhaust is recycled, the degree of supercooling and the dissolved oxygen of condensed water are reduced, the vacuum degree and the thermal efficiency of a unit are improved, the chemical make-up water flows through the heater through the steam condenser, the heat regeneration effect of the unit is improved, and the thermal economy of a power plant is improved better.

Furthermore, the main water supply pipe is provided with a flowmeter and a flow-limiting control valve, so that the water supply amount can be adjusted at any time, and the operator can accurately adjust the water supply amount at any time according to the flowmeter and the change of the air extraction load of the unit.

Drawings

Fig. 1 is a schematic structural diagram in an embodiment of the present invention.

Fig. 2 is a test chart in the embodiment of the present invention.

Wherein, 1, a replenishing water supply main pipe; 2. a water replenishing branch pipe; 3. an atomizing spray head; 4. a flow meter; 5. a flow-limiting control valve; 6. a shunt main pipe; 7. and branching branch pipes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings:

as shown in fig. 1, the water replenishing atomization system for the steam condenser of the steam turbine of the thermoelectric unit comprises a main water replenishing pipe 1 and a branch water replenishing pipe 2, wherein one end of the main water replenishing pipe 1 is arranged in the steam condenser, and the other end of the main water replenishing pipe is connected to a water replenishing source; the water outlet end of the main water supply pipe 1 is provided with a plurality of water supply branch pipes 2 which are arranged in parallel, and each water supply branch pipe 2 is provided with a plurality of atomizing nozzles 3.

The make-up water supply main pipe 1 is provided with a flow meter 4 and a flow-limiting control valve 5 for controlling the flow rate of water entering the main pipe and introducing atomized water according to the condensation requirement of the condenser.

The delivery port of moisturizing supply branch pipe 2 is equipped with the branch road that sets up perpendicularly with moisturizing supply branch pipe 2 and is responsible for 6, the branch road is responsible for 6 both ends and is equipped with two parallel arrangement's branch road 7, two branch road 7 are responsible for 6 rather than the branch road that links to each other and are the setting of H type, two branch road 7 relative one sides set up a plurality of atomizer 3, the relative atomizer that sets up of utilization improves the atomizing area of spouting, the relative atomizer that sets up of utilization, atomizing gas sprays relatively and blocks the backscattering, improve fog dispersion motion, be favorable to improving the heat absorption effect of atomizing.

The branch main pipe 6 is connected with the pipeline in the condenser through a hoop, and the connection strength of the branch main pipe 6 is improved.

The atomizing nozzle 3 adopts a three-way cooling spraying structure, so that the spraying range is enlarged, and the spraying effect is improved.

The other end of the main replenishing water supply pipe 1 is connected with a main replenishing water system pipe. The branch pipes 7 adopt reducing pipes, the pipe diameters of the joints of the branch pipes 7 and the branch main pipes 6 are larger than the pipe diameters of the two ends of the branch pipes 7, the pressure of atomizing nozzles at the upper ends of the branch pipes 7 can be ensured to be the same, the effect of uniform atomizing cooling is achieved, and the condenser is cooled uniformly.

As shown in figure 2, the nozzle of the atomizing nozzle 3 at the uppermost end on the branch pipe 7 is inclined downwards, and the included angle between the axis of the nozzle of the atomizing nozzle 3 and the horizontal direction is 15 degrees, so that the horizontal spraying is prevented from eroding the top of the condenser under the influence of heat.

This application moisturizing atomizing system pipeline adopts stainless steel, can realize atomizing particle diameter below 0.1MPA to be 600 UM's atomizing effect.

The flow-limiting control valve 5 is an electric valve, a pneumatic valve or a manual valve and is made of stainless steel.

The atomizing pipelines in the condenser/steam exhaust device are arranged in an H-shaped structure, if the condenser/steam exhaust device is divided into an A side and a B side, the pipeline system is arranged in a double H-shaped mode, and if only one side of the condenser/steam exhaust device is provided with the atomizing pipelines, single work resources are arranged.

The integral atomization pipeline in the condenser/exhaust device is arranged at the throat position of the condenser/exhaust device.

A water supplementing bypass is arranged on one side of the atomizing system water supplementing main pipe 1, when the air extraction amount of the thermodynamic system of the power plant is increased and the water supplementing amount is increased, the water supplementing bypass is opened when the water supplementing atomizing system installed in the condenser/steam exhaust device does not supplement the newly increased water amount, and the normal operation of the thermodynamic system is not influenced.

When chemical make-up water of a thermal power plant flows in at a certain pressure, the make-up water flows into a make-up water make-up main pipe 1 from a primary thermal system main pipe and flows into the throat position inside a condenser/steam exhaust device through a flow limiting control valve 5 and a flowmeter 4 respectively, the make-up water is divided into two paths by three-way make-up water inside the condenser/steam exhaust device, one path is connected to the first side of the condenser/steam exhaust device, the other path is connected to the second side of the condenser/steam exhaust device, the make-up water on the first side flows through an atomization nozzle which is arranged into an H-shaped structure through a three-way, atomization of the make-up water is realized, and; make-up water is after the throat position is atomized, fully carry out the heat exchange with the steam turbine exhaust steam of discharging from the top, absorb the exhaust steam latent heat, make-up water self temperature is risen and is reached saturation temperature and separate out dissolved oxygen, reduce the water-soluble oxygen content of condensing, because make-up water is fast with the abundant heat transfer rate of exhaust steam, improve the vacuum, reduce the condensate supercooling degree, the application of this system can improve thermal power generating set's vacuum, reduce the water-soluble oxygen content of condensing, reduce the heating of extra steam extraction to make-up water, alleviate the load of oxygen-eliminating device, reach the steam turbine exhaust steam heat of recovery, improve the unit vacuum, the purpose of the thermal economy of whole thermodynamic system is improved.

The supplementing water of the thermoelectric unit is supplemented to the interior of the condenser/steam exhaust device by a demineralized water system under a certain pressure, the supplementing water passes through an atomizing nozzle on a water supplementing pipeline and then is sprayed into the throat part of the condenser/steam exhaust device in a fine mist shape, the mist supplementing water and the steam exhaust discharged from a low-pressure cylinder of a steam turbine fully carry out heat exchange to absorb latent heat in the steam exhaust so as to reach the saturation temperature under the steam exhaust pressure, the steam enters a hot water well in a state of higher temperature than the temperature before passing through the atomizing nozzle and then flows through a high-low pressure heater and finally enters a boiler steam pocket, a hot spot unit without the atomizing system generally has the defects of large supercooling degree of the condenser/steam exhaust device and high dissolved oxygen of condensed water, the supplementing water reaches the saturation temperature under a certain pressure after being atomized, the oxygen contained in the separated water is supercooled, the water temperature of the supplementing water is improved, the temperature of the supplementing water is, the heat exchange rate is high, the vacuum degree in the condenser/steam exhaust device can be improved, so that the standard coal amount is reduced, the water temperature is higher than that in a non-atomized state after atomization, the air suction amount of the heater can be reduced when the water flows through the heater, and the load of the heater is reduced. After chemical make-up water is supplemented into the condenser, the contact area with exhaust steam is increased to the maximum extent after atomization, so that most of cold source loss of the exhaust steam is recovered, the supercooling degree and the dissolved oxygen of condensed water are reduced, the vacuum degree and the thermal efficiency of the unit are improved, the chemical make-up water flows through the heater through the condenser, the heat regeneration effect of the unit is improved, and the thermal economy of a power plant is better improved.

Claims (7)

1. A water supplementing and atomizing system of a steam turbine condenser of a thermoelectric unit is characterized by comprising a main water supplementing pipe (1) and branch water supplementing pipes (2), wherein one end of the main water supplementing pipe (1) is arranged in the steam condenser, and the other end of the main water supplementing pipe is connected to a water supplementing source; the water outlet end of the main water supply pipe (1) is provided with a plurality of water supply branch pipes (2) which are arranged in parallel, the water outlet of each water supply branch pipe (2) is provided with a branch main pipe (6) which is perpendicular to the water supply branch pipes (2), two branch pipes (7) which are arranged in parallel are arranged at two ends of the branch main pipe (6), and a plurality of atomizing nozzles (3) are arranged on one opposite side of the two branch pipes (7).

2. The steam turbine condenser water replenishing and atomizing system of the thermoelectric unit as claimed in claim 1, wherein a flow meter (4) and a flow limiting control valve (5) are arranged on the main water replenishing pipe (1).

3. The steam charging and atomizing system of the steam turbine condenser of the thermoelectric power unit as claimed in claim 1, wherein the branch main pipe (6) is connected with the pipeline in the condenser through a hoop.

4. The steam charging and atomizing system of the steam turbine condenser of the thermoelectric generating set as claimed in claim 1, wherein the atomizing nozzle (3) is of a three-way cooling and spraying structure.

5. The steam charging and atomizing system of the steam turbine condenser of the thermoelectric unit as claimed in claim 1, wherein the branch pipes (7) are reducer pipes, and the pipe diameters of the joints of the branch pipes (7) and the branch main pipes (6) are larger than those of the two ends of the branch pipes (7).

6. The steam charging and atomizing system of the steam turbine condenser of the thermoelectric power unit as claimed in claim 1, wherein the nozzle of the uppermost atomizer (3) on the branch pipe (7) is inclined downward.

7. The steam charging and atomizing system of the steam turbine condenser of the thermoelectric unit as claimed in claim 6, wherein an included angle between the nozzle axis of the atomizing nozzle (3) and the horizontal direction is 15 °.

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