CN218281217U

CN218281217U - Water spraying system for ammonia unloading area of power plant

Info

Publication number: CN218281217U
Application number: CN202221836642.1U
Authority: CN
Inventors: 邱振东
Original assignee: Foshan Hengyi Thermal Power Co ltd
Current assignee: Foshan Hengyi Thermal Power Co ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2023-01-13
Anticipated expiration: 2032-07-18

Abstract

The utility model discloses a water spraying system for power plant unloads ammonia district, including setting up ammonia detection device, spray set in unloading the ammonia district and being used for controlling the controlling means of spray set work, wherein, spray set is including setting up unload the support in ammonia district and set up a plurality of shower heads on the support, wherein, a plurality of shower heads communicate with the inlet channel respectively, the inlet end department of inlet channel is provided with water intaking valve and drenches the valve, wherein, controlling means with the valve connection is drenched in the rain. Through the improvement, make the utility model discloses a but water sprinkling system automated inspection unloads the ammonia concentration in the ammonia district, when the ammonia concentration in unloading the ammonia district is too high, can be automatic or manual start drenches the valve for a plurality of shower heads spray water in unloading the ammonia district, thereby make ammonia and water react, and then prevent ammonia further diffusion, avoid taking place the ammonia explosion with this, eliminate the potential safety hazard.

Description

Water spraying system for ammonia unloading area of power plant

Technical Field

The utility model relates to a power generation equipment specifically is a water spraying system that is used for power plant to unload ammonia district.

Background

Along with the increasingly stricter national environmental protection and the gradual improvement of the standard emission standard of boiler flue gas, the flue gas treatment desulfurization and denitration device is newly built and reconstructed for thermal power boilers, and the standard emission of the flue gas becomes a necessary choice. At present, in a thermal power plant, liquid ammonia is used for eliminating nitrogen oxides in flue gas, reducing pollution emission in the atmosphere and protecting the environment. However, liquid ammonia is most dangerous for explosion, so the accident rate is high. Therefore, the safe and reliable ammonia discharge in the ammonia area of the power plant becomes an important link for the stable operation of the system.

However, at present, liquid ammonia is filled in a liquid ammonia station by adopting a liquid ammonia transportation tank car, and then the liquid ammonia is transported to an ammonia unloading area of a power plant for ammonia unloading, but leakage potential safety hazards exist between ammonia unloading equipment (such as pipelines, valve flanges, measuring instruments and the like) in the ammonia unloading area and pipelines connected with a liquid ammonia transportation tank car.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the not enough of prior art existence, provide a water sprinkling system that is used for power plant to unload ammonia district, but water sprinkling system automated inspection unloads the ammonia concentration in the ammonia district, when the ammonia concentration in unloading the ammonia district is too high, can spray water in unloading the ammonia district automatically to make ammonia and water react, and then prevent the ammonia diffusion, avoid taking place the ammonia explosion with this, and then eliminate the potential safety hazard.

The utility model provides an above-mentioned technical problem's technical scheme be:

the utility model provides a water spraying system for power plant unloads ammonia district, is including setting up ammonia detection device, spray set in unloading the ammonia district and being used for controlling the controlling means of spray set work, wherein, spray set is including setting up unload the support in ammonia district and set up a plurality of shower heads on the support, wherein, a plurality of shower heads communicate with the inlet channel respectively, the inlet end department of inlet channel is provided with water intaking valve and rain valve, wherein, controlling means with rain valve is connected.

Preferably, the ammonia gas detection device comprises a plurality of sets of combustible gas detectors.

Preferably, the water inlet pipeline comprises a first water inlet pipeline and a second water inlet pipeline, wherein the second water inlet pipeline is connected with the plurality of spray headers on the bracket; one end of the first water inlet pipeline is connected with a water supply device, and the other end of the first water inlet pipeline is connected with the second water inlet pipeline; the deluge valve and the water inlet valve are both arranged on the first water inlet pipeline.

Preferably, a reducing three-way pipe is arranged at the joint of the first water inlet pipeline and the second water inlet pipeline.

Preferably, a branch valve is arranged between the reducing three-way pipe and the second water inlet pipeline.

Preferably, the inner diameter of the first water inlet pipe is larger than that of the second water inlet pipe.

Preferably, an emergency release valve is arranged on the second water inlet pipeline.

Preferably, the spray header is an open type spray head.

Compared with the prior art, the utility model, have following advantage and beneficial effect:

1. the utility model discloses a water spraying system for power plant unloads ammonia district detects the ammonia that unloads in the ammonia district through ammonia detection device, when the ammonia concentration that unloads the ammonia district exceeds the setting value, controlling means control drenches valve work, thereby make inlet channel and a plurality of shower head intercommunication, and a plurality of shower heads then can be to unloading the interior water spray of ammonia district, make the ammonia and the water reaction in the ammonia district of unloading, both can prevent the ammonia diffusion, and can also dilute the ammonia concentration of unloading in the ammonia district, prevent to unload the ammonia concentration in the ammonia district too high and blast.

2. The water spraying system for the ammonia unloading area of the power plant can electrically control the operation of the shower valve through the control device, so that a plurality of spray heads spray water, and all-weather prevention of the ammonia unloading area is realized; and if leakage occurs in the process of manually unloading ammonia, the deluge valve can be manually opened, so that the liquid ammonia can be diluted by emergency manual spraying.

Drawings

Fig. 1 is a schematic structural diagram of a water spraying system for an ammonia unloading area of a power plant.

Fig. 2 is a control flow chart of the water spraying system for the ammonia unloading area of the power plant of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

Referring to fig. 1-2, the utility model discloses a water spraying system for power plant unloads ammonia district is including setting up ammonia detection device, the spray set in unloading ammonia district 6 and being used for controlling the controlling means of spray set work, wherein, spray set is including setting up support 10 in unloading ammonia district 6 and setting up a plurality of shower heads 7 on support 10, and wherein, a plurality of shower heads 7 communicate with the inlet channel respectively, the inlet end department of inlet channel is provided with water intaking valve 1 and rain valve 2, wherein, controlling means with rain valve 2 is connected.

In this embodiment, the ammonia gas detection device includes a plurality of sets of combustible gas detectors, the combustible gas detectors are used for detecting the ammonia gas concentration, the setting positions of the plurality of sets of combustible gas detectors can be flexibly arranged according to the actual situation of the ammonia unloading area 6, in addition, an alarm can be also arranged in the ammonia unloading area 6, and when the ammonia gas concentration in the ammonia unloading area 6 is greater than a set value, an alarm is given; in addition, the combustible gas detector can also be a gas detector alarm unit on the liquid ammonia storage tank, the ammonia gas concentration of the ammonia unloading area 6 is detected through the gas detector alarm unit, real-time alarm is carried out, and detection data are transmitted to the control device, so that the control device can judge and output a corresponding control instruction.

Referring to fig. 1-2, the water inlet pipe comprises a first water inlet pipe 8 and a second water inlet pipe 9, wherein the second water inlet pipe 9 is connected with a plurality of shower heads 7 on the bracket 10; one end of the first water inlet pipeline 8 is connected with a water supply device (such as a fire-fighting main pipe), and the other end of the first water inlet pipeline is connected with the second water inlet pipeline 9; the deluge valve 2 and the water inlet valve 1 are both arranged on the first water inlet pipeline 8; the first water inlet pipeline 8 is a fire fighting pipeline, the second water inlet pipeline 9 is connected into the first water inlet pipeline 8 through a reducing three-way pipe 3, the inner diameter of the first water inlet pipeline 8 is larger than that of the second water inlet pipeline 9, the first water inlet pipeline 8 is matched with a plurality of spray heads 7, a branch valve 4 is arranged between the reducing three-way pipe 3 and the second water inlet pipeline 9, and the second water inlet pipeline 9 and the plurality of spray heads 7 can be conveniently cleaned and maintained by closing the branch valve 4.

Referring to fig. 1-2, an emergency release valve 5 is disposed on the second water inlet pipe 9, and water in the second water inlet pipe 9 can be discharged by opening the emergency release valve 5; in this embodiment, the second water inlet pipe 9 is composed of a vertical section, a first horizontal section, an inclined section and a second horizontal section in sequence, wherein the water in the vertical section, the first horizontal section and the inclined section can be discharged through the emergency release valve 5, and the water in the second horizontal section can be discharged through the plurality of shower heads 7.

Referring to fig. 1-2, the shower heads 7 are open type shower heads, and the arrangement positions of the groups of shower heads 7 can be flexibly selected according to actual conditions, but in this embodiment, open type shower heads of ZSTM-8 (series) can be selected according to the area of the ammonia unloading zone 6 and the ammonia unloading amount (maximum), and the open type shower heads are set to four groups.

Referring to fig. 1-2, the deluge valve 2 may be an existing deluge valve 2, and may include, for example, a deluge valve set main control valve (normally open), a diaphragm chamber water supply control valve, a protection area field manual start device, an open type spray or automatic sprinkler head, a temperature/smoke detector, a water supply pressure gauge, a diaphragm chamber pressure gauge, a system drain valve (normally closed), a main drain valve (normally closed), a diaphragm chamber automatic shut-off valve, a water flow pressure alarm switch, a hydraulic alarm bell, an electromagnetic valve, and a deluge valve release control panel.

Referring to fig. 1-2, the control device includes a fire control input module, a fire control host, and an output control module.

Referring to fig. 1-2, the control principle of the water spraying system for the ammonia unloading area of the power plant of the present invention is as follows:

according to the equipment condition of unloading ammonia district 6, design the utility model discloses a water spraying system should unload the ammonia district 6 and appear the condition that the ammonia leaked, and satisfy automatic/manual control's requirement.

Firstly, a fire-fighting spray header (namely a second water inlet pipeline 9) is connected into a rear main pipe (namely a first water inlet pipeline 8) of the ammonia zone deluge valve group.

Under the automatic control mode, utilize gas detection instrument alarm unit output signal (normally open signal contact) on the liquid ammonia storage tank to input to fire control input control module, after inputing the fire control host computer through fire control input module signal variation condition (normally open or normally closed), after the fire control host computer received the signal, send control command and make output control module send control signal, the solenoid valve of installing on the balanced valve pressure release pipe of valve group is drenched in this drive is opened, make the balance of the valve group that drenches lose, thereby make the valve group that drenches open, realize automatic control.

In the manual control mode, a manual pressure relief valve (namely a field manual starting device of a protection area) arranged on the deluge valve group is opened, and the deluge valve group is manually opened in an emergency, so that the balance of the deluge valve group is lost, and the aim of spraying is fulfilled (note: the water inlet valve 1 and the branch valve 4 are in a normally open state).

The water supply pressure of the fire-fighting main pipe is 10.5bar, the pipe diameter of the main pipe is DN300, and the water spraying pressure of the ammonia unloading area 6 is selected as follows: in order to ensure that the continuous pressure required by spraying is required to be constant above 8bar, the pipe diameter of the branch main pipe is selected to be DN100 based on the design grade, and the constant pressure and stability of the pressure required by a spray header 7 (ZSTM-8 (series) open type) can be met.

Finally, the utility model discloses a solve the potential safety hazard that unloads ammonia equipment existence in the ammonia district of unloading, through the reserves according to the area in the ammonia district of unloading and storage tank car, design out the utility model discloses a water spraying system for power plant unloads ammonia district, as the initial stage of taking precautions against emergency and take precautions against, utilize liquid ammonia detection device to detect the liquid ammonia density in the ammonia district of unloading, controlling means is according to detecting information, do corresponding control command for the rain valve makes the response action, reach the equipment linkage, automatic, function such as manual, make and unload ammonia district and liquid ammonia storage tank and be in common precaution scope, eliminate the potential safety hazard.

The above is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. The utility model provides a water spraying system for power plant unloads ammonia district, its characterized in that, is including setting up ammonia detection device, spray set in unloading the ammonia district and being used for controlling the controlling means of spray set work, wherein, spray set is including setting up unload support and the plurality of shower heads of setting on the support in the ammonia district, wherein, a plurality of shower heads respectively with the inlet channel intercommunication, the inlet end department of inlet channel is provided with water intaking valve and rain valve, wherein, controlling means with the rain valve is connected.

2. A water spray system for use in an ammonia discharge zone of a power plant as claimed in claim 1, wherein said ammonia gas detecting means comprises a plurality of sets of combustible gas detectors.

3. A water spray system for use in an ammonia dump of a power plant as claimed in claim 1, wherein the water inlet conduit comprises a first water inlet conduit and a second water inlet conduit, wherein the second water inlet conduit is connected to a plurality of spray headers on the support; one end of the first water inlet pipeline is connected with a water supply device, and the other end of the first water inlet pipeline is connected with the second water inlet pipeline; the deluge valve and the water inlet valve are both arranged on the first water inlet pipeline.

4. A water spray system for use in an ammonia discharge zone of a power plant as claimed in claim 3, wherein a tee is provided at the junction of the first and second water inlet conduits.

5. A water spray system for a power plant ammonia offloading zone as defined in claim 4, wherein a branch valve is provided between the reducing tee and the second water inlet conduit.

6. A water spray system for use in an ammonia discharge zone of a power plant as claimed in claim 5, wherein the first water inlet conduit has an internal diameter greater than the internal diameter of the second water inlet conduit.

7. A water spray system for an ammonia discharge zone of a power plant as claimed in claim 6, wherein an emergency release valve is provided on the second water inlet conduit.

8. A water spray system for use in an ammonia dump zone of a power plant as claimed in claim 1, wherein the spray header is an open spray header.