CN211310988U

CN211310988U - Nuclear power unit conventional island contains ammonia wastewater collection and discharging equipment

Info

Publication number: CN211310988U
Application number: CN201921992247.0U
Authority: CN
Inventors: 王宗魁; 刘强; 司先国; 代荣喜; 鲁玲江; 岳兴华; 龚鑫
Original assignee: CNNC Nuclear Power Operation Management Co Ltd; Qinshan Nuclear Power Co Ltd
Current assignee: CNNC Nuclear Power Operation Management Co Ltd; Qinshan Nuclear Power Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-08-21
Anticipated expiration: 2029-11-18

Abstract

The utility model belongs to the technical field of the nuclear power technology, concretely relates to conventional island of nuclear power unit contains ammonia wastewater collection and discharging equipment. The device's the collection box top that contains ammonia water is provided with contains female pipe of ammonia wastewater collection and exhaust duct, and the bottom has connected gradually waste water drainage pump and waste water neutralization pond female pipe through the pipeline, and the lateral wall is provided with high liquid level switch and low liquid level switch, is used for opening and closing of control waste water drainage pump respectively. Has the advantages that: this device will contain ammonia wastewater and collect containing ammonia collecting box to discharge waste water neutralization pond through the wastewater discharge pump and handle, thereby avoid conventional island factory building to contain ammonia pollution, reduce environmental pollution, reduce the site operation risk.

Description

Nuclear power unit conventional island contains ammonia wastewater collection and discharging equipment

Technical Field

The utility model belongs to the technical field of the nuclear power technology, concretely relates to conventional island of nuclear power unit contains ammonia wastewater collection and discharging equipment.

Background

The secondary loop of the nuclear power unit adds ammonia water (NH) into the water supply₃·H₂O) adjusting the pH value of the two loops to solve the corrosion problem of the two loops and improve the stability of the metal material. After the steam does work in the low-pressure cylinder, part of ammonia gas volatilizes from the steam and is dispersed in the condenser, and the vacuum pump pumps the ammonia gas and other non-condensable gases into a steam-water separator of the vacuum pump in the vacuumizing process of the condenser. When the steam-water separator condenses steam, part of ammonia gas is dissolved in the condensed working solution.

According to the theory of operation of vacuum pump, most contain the ammonia gas in the atmosphere is arranged, in a small amount of working solution that mixes water ring vacuum pump, when working solution is more and more, will overflow to the pit from the overflow pipe of separator, because condenser vacuum pumping system overflow water ammonia content is higher, and fire control water blowdown pit is non-sealed design, causes near the blowdown pit to have heavier peculiar smell easily, and the peculiar smell is especially obvious under the summer operating mode. Ammonia has strong pungent smell, and long-term inhalation may cause respiratory diseases or acute poisoning, and harm the health of workers; meanwhile, the ammonia content exceeds the standard, so that the part of wastewater is discharged directly without being treated, and the risk of violating the sewage discharge standard exists.

Therefore, urgently needed utility model a conventional island of nuclear power unit contains collection and discharging equipment of ammonia waste water makes and contains ammonia waste water and not gather in conventional island factory building, can with waste water and contain the conventional island factory building of ammonia waste gas in time discharging, contains ammonia waste water and discharges waste water and handle in the pond, makes conventional island factory building avoid containing the pollution of ammonia waste water and waste gas.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a conventional island of nuclear power unit contains ammonia wastewater collection and discharging equipment to the problem that current conventional island of nuclear power unit waste water ammonia content is higher, and the air is easily polluted.

The technical scheme of the utility model as follows:

a nuclear power unit conventional island ammonia-containing wastewater collecting and discharging device comprises an ammonia-containing wastewater collecting main pipe, an exhaust pipeline, an ammonia-containing water collecting box, a wastewater discharging pump and a wastewater neutralizing tank main pipe; the ammonia-containing wastewater collecting main pipe and the exhaust pipeline are arranged at the top of the ammonia-containing water collecting box, and the bottom of the ammonia-containing water collecting box is sequentially connected with a wastewater discharge pump and a wastewater neutralizing tank main pipe through pipelines; the side wall of the ammonia-containing water collecting box is also provided with a high liquid level switch and a low liquid level switch which are respectively used for controlling the opening and the closing of the wastewater discharge pump.

Furthermore, the waste water discharge pump is two waste water discharge pumps with non-return functions and arranged in parallel. And the pipelines in front of and behind the wastewater discharge pump are respectively provided with a front isolation valve and a rear isolation valve.

Further, a respirator is arranged on the exhaust pipeline; the respirator is a one-way valve.

Further, a high liquid level switch and a low liquid level switch on the side wall of the ammonia water collecting box are replaced by liquid level sensors.

Further, the ammonia water containing collecting box is arranged at the bottommost layer of the conventional island plant of the nuclear power station.

Further, one of the two ammonia water-containing discharge pumps is a spare ammonia water-containing discharge pump.

The beneficial effects of the utility model reside in that:

the utility model relates to a collect and discharge the waste water that contains ammonia in the conventional island of nuclear power unit and to waste water neutralization pond in, prevent that the air from receiving the pollution in the conventional island factory building, guarantee staff's safety and a collection and discharge system who contains ammonia waste water who designs. This set of device will contain ammonia wastewater and collect and contain the aqueous collection case, and will contain ammonia wastewater through the wastewater discharge pump and discharge and handle in waste water neutralization pond, compare in the preceding aqueous waste that contains ammonia and gather in circulating water drainage pit, fill whole conventional island factory building, contain collection and the discharging device system of ammonia wastewater through this set of conventional island, make the ammonia pollution of conventional island factory building effectively avoid, and in waste water neutralization pond to containing ammonia wastewater neutralization treatment, can reduce environmental pollution, in addition, the site operation risk has been reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1-collecting a mother pipe for ammonia-containing wastewater; 2-an exhaust duct; 3-an ammoniated water collecting tank; 4-front isolation valve a; 5-ammonia containing water discharge pump A; 6-rear isolation valve A; 7-front isolation valve B; 8-ammonia containing water discharge pump B; 9-rear isolation valve B; 10-neutralizing a main pipe of the pool by waste water; 11-a respirator; 12-high level switch; 13-low level switch.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiment provides a conventional island of nuclear power unit contains ammonia wastewater collection and discharging equipment, and its structure is shown in figure 1, mainly by containing ammonia wastewater collection female pipe 1, exhaust duct 2, containing ammonia water collecting box 3, waste water discharge pump, waste water neutralization pond female pipe 10, high liquid level switch 12 and low liquid level switch 13 constitute. The ammonia water containing collecting box 3 is arranged at the bottommost layer of a conventional island plant of a nuclear power station, the ammonia water containing waste water collecting main pipe 1 and the exhaust pipeline 2 are arranged at the top of the ammonia water containing collecting box 3, the exhaust pipeline 2 is provided with the respirator 11, the respirator 11 of the embodiment has a filtering function, when the ammonia water containing collecting box 3 collects ammonia water, filtered ammonia containing waste gas is discharged outwards through the respirator 11, when the ammonia water containing collecting box 3 discharges ammonia containing waste water, the tank is prevented from being shriveled, and then the gas is sucked inwards through the respirator 11; the bottom of the ammonia water containing collecting box 3 is sequentially connected with a waste water discharge pump and a waste water neutralization tank main pipe 10 through pipelines, and the pipelines at the front and the rear of the waste water discharge pump are respectively provided with a front isolation valve and a rear isolation valve; the side wall of the ammonia water containing collecting box 3 is also provided with a high liquid level switch 12 and a low liquid level switch 13 which are respectively used for controlling the opening and closing of the wastewater discharge pump. A liquid level sensor can be arranged in the ammonia-containing water collecting box 3 to monitor the liquid level height in real time, so that the opening and closing of the wastewater discharge pump can be controlled manually or automatically.

The ammonia-containing wastewater collection and discharge device of the embodiment is provided with two ammonia-containing wastewater discharge pumps connected in parallel, as shown in fig. 1, an ammonia-containing water discharge pump a5 and an ammonia-containing water discharge pump B8 are respectively provided, a front isolation valve a4 and a rear isolation valve a6 are respectively provided in front of and behind the ammonia-containing water discharge pump a5, a front isolation valve B7 and a rear isolation valve B9 are respectively provided in front of and behind the ammonia-containing water discharge pump B8, and the two ammonia-containing water discharge pumps are used and prepared for one use, thereby facilitating isolation and maintenance.

The device for collecting and discharging the ammonia-containing wastewater is arranged at the bottommost layer of a conventional island plant of a nuclear power station, and the ammonia-containing overflow water of a steam-water separator of a condenser vacuumizing system is automatically collected into an ammonia-containing wastewater collecting main pipe 1 and then enters an ammonia-containing water collecting box 3; ammonia gas separated from the ammonia-containing wastewater in the ammonia-containing wastewater collection tank 3 is discharged from the exhaust pipeline 2 to the atmosphere from the top through the respirator 11; set up high liquid level switch 12 and low liquid level switch 13 in the waste water collecting box 3 that contains ammonia, when the waste water collecting box 3 liquid level that contains ammonia reaches high liquid level, high liquid level switch 12 action starts containing ammonia waste water discharge pump A5 of taking the contrary function of contrary and discharges containing ammonia waste water to waste water neutralization pond through isolation valve around, or starts containing ammonia waste water discharge pump B8 of taking the contrary function and discharges containing ammonia waste water to waste water neutralization pond through isolation valve around. When the liquid level of the ammonia-containing wastewater collection tank 3 reaches a low liquid level, the low-level switch 13 is actuated, and the 5 ammonia-containing wastewater discharge pump A or the 8 ammonia-containing wastewater discharge pump B is stopped (according to the starting condition).

The use method of the device for collecting and discharging the ammonia-containing wastewater of the conventional island of the nuclear power unit specifically comprises the following steps:

step 1, collecting ammonia-containing wastewater into an ammonia-containing water collecting box 3 by using an ammonia-containing wastewater collecting main pipe 1;

step 2, discharging ammonia gas separated out from the ammonia-containing wastewater from the top of the ammonia-containing wastewater collection box 3 to the atmosphere from the exhaust pipeline 2 through the respirator 11;

step 3, when the liquid level of the ammonia-containing wastewater collection box 3 reaches a high liquid level switch 12, starting an ammonia-containing wastewater discharge pump, and discharging ammonia-containing wastewater to a wastewater neutralization tank along a wastewater neutralization tank main pipe 10;

step 4, when the liquid level of the ammonia-containing wastewater collection box 3 reaches the low liquid level switch 13, closing the ammonia-containing wastewater discharge pump;

and 5, measuring the pH value of the wastewater neutralization tank in the wastewater neutralization tank, performing acid-base neutralization by adopting sulfuric acid and sodium hydroxide solution until the pH value is adjusted to 6-9, and discharging the conventional island waste liquid storage and discharge system after the chemical sampling inspection is qualified, so that the discharge of the ammonia-containing wastewater is completed once.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. The utility model provides a conventional island of nuclear power unit contains ammonia wastewater collection and discharging equipment which characterized in that: comprises an ammonia-containing waste water collecting main pipe (1), an exhaust pipeline (2), an ammonia-containing water collecting box (3), a waste water discharge pump and a waste water neutralizing tank main pipe (10); the ammonia-containing wastewater collecting main pipe (1) and the exhaust pipeline (2) are arranged at the top of the ammonia-containing water collecting box (3), and the bottom of the ammonia-containing water collecting box (3) is sequentially connected with a wastewater discharge pump and a wastewater neutralizing tank main pipe (10) through pipelines; the side wall of the ammonia-containing water collecting box (3) is also provided with a high liquid level switch (12) and a low liquid level switch (13) which are respectively used for controlling the opening and closing of the wastewater discharge pump.

2. The ammonia-containing wastewater collection and discharge device for the conventional island of the nuclear power plant set as claimed in claim 1, wherein: and the pipelines in front of and behind the wastewater discharge pump are respectively provided with a front isolation valve and a rear isolation valve.

3. The ammonia-containing wastewater collection and discharge device for the conventional island of the nuclear power plant set as claimed in claim 2, characterized in that: the two waste water discharge pumps are arranged in parallel.

4. The ammonia-containing wastewater collection and discharge device of the conventional island of the nuclear power plant as claimed in claim 1, 2 or 3, wherein: a respirator (11) is arranged on the exhaust pipeline (2).

5. The ammonia-containing wastewater collection and discharge device for the conventional island of the nuclear power plant set as claimed in claim 4, wherein: the respirator (11) has a filtering function.

6. The ammonia-containing wastewater collection and discharge device of the conventional island of the nuclear power plant as claimed in claim 1, 2 or 3, wherein: and a high liquid level switch (12) and a low liquid level switch (13) on the side wall of the ammonia-containing water collecting box (3) are replaced by liquid level sensors.

7. The ammonia-containing wastewater collection and discharge device of the conventional island of the nuclear power plant as claimed in claim 1, 2 or 3, wherein: the waste water discharge pump is a waste water discharge pump with a non-return function.

8. The ammonia-containing wastewater collection and discharge device of the conventional island of the nuclear power plant as claimed in claim 1, 2 or 3, wherein: the ammonia water containing collecting box (3) is arranged at the bottommost layer of the conventional island plant of the nuclear power station.

9. The ammonia-containing wastewater collection and discharge device for the conventional island of the nuclear power plant set as claimed in claim 3, wherein: one of the two ammonia water containing discharge pumps is a standby ammonia water containing discharge pump.