CN204111377U - A kind of nuclear power condensate polishing treatment strainer - Google Patents

Abstract

A filter for condensate polishing, including a housing, a water distribution device and a water outlet device, the housing is a columnar structure, the diameter of the housing is 3200mm to 4200mm, and the height of the cylinder is 2000mm to 3500mm; The shell is welded by two equal-diameter curved heads and a cylindrical cylinder; the water distribution device is composed of a detachable water baffle, a peripheral ring plate, a support rod, a water distribution perforated plate, and a water distribution perforated plate There is a water distribution cap on the top, the support rod is connected between the water distribution porous plate and the head, and the detachable water baffle is installed under the water inlet of the head of the equipment body. The utility model adopts a large-diameter columnar structure, which can greatly increase the amount of water treated by the equipment, greatly reduce the disturbance of the water flow, and ensure the stability of the resin layer; thereby improving the quality of the effluent.

Description

A filter for nuclear power condensate polishing

technical field

The utility model relates to an ultra-large ion exchange device of a nuclear power secondary circuit, that is, a filter for condensate fine treatment, which is especially suitable for a nuclear power plant condensate fine treatment system and belongs to the field of industrial water treatment.

Background technique

At present, according to the national energy conservation and environmental protection policy, it is a development trend to vigorously develop large-capacity and high-parameter units in nuclear power and thermal power plants to replace small units. Since 2003, most of the newly-built thermal power units are 600MW, 1000MW supercritical and ultra-supercritical units, and most of the new nuclear power plant units are 1000MW units, so the requirements for condensate volume and water vapor quality are getting higher and higher. If ion exchange equipment with a smaller diameter is used, the number of equipment needs to be increased, and at the same time, system pipes, valves and other components are correspondingly increased, which increases the area occupied by the entire system and increases the difficulty of automatic control of the system, making the system safe and stable. Running carries risks. Moreover, the increase in the number of equipment leads to frequent in vitro regeneration of resin fillers, which increases the working pressure of the in vitro regeneration system equipment. However, due to the fixed and necessary regeneration time, in severe cases, it may cause the failed resin to be regenerated too late, affecting the continuous operation of the system. The existing spherical filter equipment, due to its own structural problems, when the water enters through the water distribution plate, due to the increasing space of the equipment, the water flows along the arc and spreads around, and cannot form a columnar downward flow, which easily causes the water flow distribution during the operation of the equipment to be uneven. Uniform, easy to produce bias flow, turbulent flow, water flow disturbance resin filler. In addition, the columnar height of the traditional columnar filtration equipment is less than 2000mm, and the height of the water cushion is less than 600mm, so that the water flow cannot be sufficiently buffered, the resin filler is easily stirred, the quality of the effluent and the amount of periodic water production are reduced, and the operating cost of the system is relatively high.

Utility model content

The purpose of this utility model is to provide a nuclear power secondary circuit ultra-large ion exchange equipment, that is, a filter for nuclear power condensate polishing treatment. The diameter of the equipment is increased, the amount of treated water is greatly increased, the number of equipment is reduced, and the difficulty of automatic control of the system is reduced. The floor area of the system is saved; the columnar cylinder makes the water flow form a uniform columnar downward flow, which can ensure uniform water distribution; the height of the equipment is increased to increase the height of the water cushion, even if the water flow is sufficiently buffered, to avoid bias and turbulent flow, Furthermore, the disturbance of the resin filler is avoided, and the residence time of the water flow in the equipment is increased, which can improve the quality of the effluent water and the amount of periodic water production, prolong the service life of the resin filler of the equipment, and reduce the operating cost of the system.

The technical solution of the utility model: a filter for nuclear power condensate polishing, including a shell, a water distribution device and a water outlet device, the shell is a columnar structure, the diameter of the shell is 3200mm to 4200mm, and the height of the column is 2000mm to 3500mm; the shell is welded by two isometric curved heads and a cylindrical cylinder; the water distribution device consists of a detachable water baffle, a peripheral ring plate, The water distribution perforated plate and the water distribution perforated plate are provided with water distribution caps, the support rod is connected between the water distribution perforated plate and the head, and the detachable water baffle is installed under the water inlet of the head of the equipment body.

In the aforementioned filter for condensate polishing, the water distribution perforated plate is made of a circular plate with holes, and an oval inner manhole plate with an evenly distributed water cap is installed on the circular plate. on the opening. The oval inner manhole plate is detachable, which is convenient for the upper maintenance of the water distribution perforated plate.

In the aforementioned filter for condensate polishing, the inner wall of the housing and the edge of the water distribution porous plate are connected by welding.

In the aforementioned filter for condensate polishing, the water outlet device is composed of a water outlet porous plate, a water outlet cap evenly distributed on the water outlet porous plate, a support column and a water outlet baffle, and the support column is connected between the water outlet porous plate and the head , the water outlet porous plate and the support column are welded, and the water outlet baffle is welded above the water outlet.

In the aforementioned filter for condensate polishing, the edge of the water outlet porous plate of the water outlet device is welded to the shell.

Beneficial effects of the utility model: Compared with the prior art, the utility model adopts a super large ion exchange (filter) equipment for the secondary circuit of nuclear power. The utility model adopts a columnar structure with a large diameter, and the amount of water treated by the equipment is greatly improved, reducing system equipment and Imported automatic valves, supporting instruments and meters, and the number of pipelines reduce floor space and system input costs; the water distribution device can use detachable baffle + ring plate, perforated plate + water cap secondary water distribution device; the water outlet device uses water outlet Porous plate + water outlet cap + water outlet baffle water collection device form. Due to the increase of the diameter of the equipment, the amount of treated water is greatly increased, the number of equipment is reduced, the difficulty of automatic control of the system is reduced, and the floor area of the system is saved; the columnar cylinder makes the influent water form a uniform columnar downward flow, which can ensure uniform water distribution ; Increase the height of the equipment, increase the height of the water cushion, so that the water flow can be sufficiently buffered, avoid bias flow, turbulent flow, and avoid disturbance of the resin filler. Greatly reduce the water flow impact of the incoming water, ensure that the water flow in the resin layer is stable, and the flow velocity is reduced), so that the residence time of the water flow in the equipment increases, which can improve the quality of the effluent water and the amount of periodic water production, prolong the service life of the equipment resin filler, and reduce the system. Operating cost; the water outlet device at the bottom of the equipment cancels the stainless steel jacketed head, which reduces the manufacturing cost of the equipment. Increase the contact time between the water flow and the ion exchanger, and the incoming water forms a uniform columnar flow, which greatly reduces the disturbance of the water flow and ensures the stability of the resin layer; thereby improving the water quality of the effluent; the water outlet device uses a water outlet porous plate + water outlet cap + outlet baffle set The water device form can improve the quality of effluent water and the amount of periodic water production, prolong the service life of the ion exchanger in the equipment, and reduce the operating cost of the system.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic structural view of the water distribution plate of the present invention.

The marks in the drawings are: 1-housing, 2-water distribution device, 3-water outlet device, 4-removable water baffle, 5-peripheral ring plate, 6-water distribution porous plate, 7-water distribution cap , 8-support rod, 9-water retaining plate suspender, 10-upper manhole, 11-elliptic inner manhole plate, 12-outlet perforated plate, 13-outlet water cap, 14-support column, 15-lower manhole hole, 16-water outlet baffle, 17-peep mirror.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Embodiment of the present utility model: a super large ion exchange equipment for the secondary circuit of nuclear power, the structure is shown in Figure 1; it includes a housing 1, a water distribution device 2 and a water outlet device 3, the main body of the housing 1 is a columnar structure, and the housing The diameter of the body 1 is 3200mm to 4200mm, with a typical design of 3400mm; the height of the cylinder is 2000mm to 3500mm, with a typical design of 2400mm.

The shell 1 is welded by two isometric curved heads and a cylindrical barrel.

The water distribution device 2 is composed of a detachable water baffle, a peripheral ring plate, a water distribution porous plate, a water distribution cap on the water distribution plate and a support rod, and the detachable water baffle is installed at the water inlet of the head of the equipment body below.

The structure of the water distribution perforated plate 6 is as shown in Figure 2; a circular plate 10 is perforated and formed, and a group of oval inner manhole plates 11 with a water cap are installed on it, and a water cap with a water cap is installed on it. The elliptical inner manhole plate is adjusted according to the diameter of the manhole, ranging from 400mm to 500mm in the major axis diameter and 400mm in the minor axis diameter. The typical design major axis diameter is 480mm and the minor axis diameter is 400mm.

The inner wall of the housing 1 is connected to the water distribution perforated plate 6 by welding, and the oval inner manhole plate 11 with its own water cap is connected by fasteners.

The water outlet device 3 is composed of a water outlet porous plate 12, a water outlet cap 13 on the water outlet porous plate, a support column 14 and a water outlet baffle 16. The water outlet porous plate 12 and the support column 14 are welded, and the water outlet baffle 16 is welded on the water outlet above.

The water outlet device 3 is welded to the housing 1 through the water outlet perforated plate 12 .

The casing 1 is provided with two manholes, the upper manhole 10 and the lower manhole 15, with a diameter of 400mm to 500mm; the lower part is the water outlet device 3, which is an arc-shaped plate;

The water distribution cap 7 is cylindrical, with a gap of 0.4-1.0 mm, a height of 40-80 mm, and a diameter of 50-90 mm;

The outlet water cap 13 is cylindrical, with a gap of 0.2-0.3 mm, a height of 40-80 mm, and a diameter of 50-90 mm;

Below the equipment is the water outlet, the specification is DN350mm;

The inlet and outlet of the upper and lower parts of the equipment: DN50mm to DN150mm;

A peep mirror DN100mm is designed in the equipment housing part. DN is the nominal diameter, mm is millimeter.

Claims (5)

1. a nuclear power condensate polishing treatment strainer, is characterized in that comprising housing, water-distributing device and discharging device, and described housing is columnar structure, and the diameter of housing is 3200mm to 4200mm, and height of column is 2000mm to 3500mm; Described housing is welded by two isometrical head surfaces and a column-shaped barrel; Described water-distributing device is provided with water distribution water cap by dismountable water eliminator, peripheral girth sheets, support bar, water distribution porous plate, water distribution porous plate, support bar is connected between water distribution porous plate and end socket, and detachable water eliminator is arranged on below apparatus body end socket water-in.

2. nuclear power condensate polishing treatment strainer according to claim 1, it is characterized in that described water distribution porous plate is formed by one piece of circular flat-plate pore-opening, and be provided with one piece carry be uniformly distributed water cap ellipse in manhole plate be arranged in circular dull and stereotyped perforate.

3. nuclear power condensate polishing treatment strainer according to claim 1, is characterized in that the inwall of described housing and water distribution porous plate edge conjunction mode are welded construction.

4. nuclear power condensate polishing treatment strainer according to claim 1, it is characterized in that described discharging device forms by water outlet porous plate, water outlet porous plate being uniformly distributed water outlet water cap, pillar stiffener and water outlet baffle plate, pillar stiffener is connected between water outlet porous plate and end socket, water outlet porous plate and pillar stiffener are welded, and water outlet baffle plate is welded on above water outlet.

5. nuclear power condensate polishing treatment strainer according to claim 4, is characterized in that water outlet porous plate edge and the case weld of described discharging device.