Boiler denitration ammonia supply pipeline structure

Abstract

The utility model discloses a boiler denitration ammonia supply pipeline structure, which belongs to the technical field of ammonia supply pipelines and comprises an ammonia supply main pipe, an ammonia supply branch pipe and a conveying connecting pipe, the ammonia supply branch pipe is arranged outside the ammonia supply main pipe, and the ammonia supply branch pipe and the ammonia supply main pipe are jointly connected with the conveying connecting pipe. A gas ammonia mixer connected with boiler denitration equipment is arranged at the outlet end of the conveying connecting pipe, a flowmeter is arranged at the joint of the ammonia supply main pipe and the conveying connecting pipe, a main valve and a branch valve are installed on the ammonia supply main pipe and the ammonia supply branch pipe respectively, and filter cartridges are arranged in the middle of the ammonia supply main pipe and the middle of the ammonia supply branch pipe respectively. The ammonia supply pipeline structure has the advantages that the ammonia supply pipeline structure is connected to a boiler denitration system, ammonia gas can be conveyed through the ammonia supply main pipe, and under the condition that the ammonia supply main pipe fails and is abnormal, the ammonia supply main pipe can be closed and the ammonia supply branch pipes can be opened for conveying; corresponding electric control valves and filters are arranged on the ammonia supply main pipe and the ammonia supply branch pipes, so that the ammonia gas conveying effect can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ammonia supply pipeline, specifically, relates to a boiler denitration ammonia supply pipeline structure. BACKGROUND

[0002] In order to prevent the coal in the boiler from producing too much NOx pollution to the environment after burning, the coal should be subjected to denitration treatment. It is divided into pre-combustion denitration, combustion process denitration and post-combustion denitration. In the process of boiler denitration, ammonia gas can be supplied to carry out denitration on the boiler flue gas, which can generally be realized through related ammonia supply pipelines.

[0003] The boiler denitration ammonia supply pipeline structure in the prior art mostly has only a single supply pipeline. When the denitration ammonia supply pipeline fails, it will cause abnormal fluctuation or interruption of ammonia supply, thereby affecting the normal operation of denitration, and the safety and practicability of the ammonia supply pipeline itself also need to be improved. At the same time, the utility model discloses a kind of denitration ammonia gas conveying pipeline in the utility model patent with announcement number CN209393033U, including input pipe, output pipe and being arranged between input pipe and output pipe main conveying pipeline and auxiliary conveying pipeline, the input end of main conveying pipeline is communicated with input pipe, the output end of main conveying pipeline is communicated with output pipe, the input end of auxiliary conveying pipeline is communicated with input pipe, the output end of auxiliary conveying pipeline is communicated with output pipe, pneumatic regulating valve is arranged on main conveying pipeline, electric regulating valve is arranged on auxiliary conveying pipeline, pneumatic cut-off valve is arranged on input pipe, only a single supply pipeline, when the denitration ammonia supply pipeline fails, it will cause abnormal fluctuation or interruption of ammonia supply, and the safety and practicability of the ammonia supply pipeline itself also need to be improved. SUMMARY

[0004] In order to overcome the problems in the prior art that the boiler denitration ammonia supply pipeline structure mostly has only a single supply pipeline, when the denitration ammonia supply pipeline fails, it will cause abnormal fluctuation or interruption of ammonia supply, thereby affecting the normal operation of denitration, and the safety and practicability of the ammonia supply pipeline itself also need to be improved, the utility model provides a kind of boiler denitration ammonia supply pipeline structure, including ammonia supply main pipe, ammonia supply branch pipe and conveying connecting pipe, the outside of ammonia supply main pipe is provided with ammonia supply branch pipe, ammonia supply branch pipe and ammonia supply main pipe are jointly connected with conveying connecting pipe, the outlet end of conveying connecting pipe is provided with gas ammonia mixer connected with boiler denitration equipment, the connecting place of ammonia supply main pipe and conveying connecting pipe is provided with flowmeter, main road valve and branch valve are respectively installed on ammonia supply main pipe and ammonia supply branch pipe, filter cartridge is arranged in the middle of ammonia supply main pipe and ammonia supply branch pipe.

[0005] The ammonia supply pipeline structure is connected to the boiler denitration system, ammonia gas can be transported through the ammonia supply main pipe, in the case of abnormal failure of the ammonia supply main pipe, the ammonia supply main pipe can be closed and the ammonia supply branch pipe can be opened for transportation, meanwhile, the ammonia supply main pipe and the ammonia supply branch pipe are provided with corresponding electric control valves and filters, which can improve the ammonia gas transportation effect.

[0006] Preferably, the inlet end of the ammonia supply main pipe is externally connected to an ammonia source, and a control valve and a pressure gauge are sequentially arranged near the inlet end of the ammonia supply main pipe.

[0007] Preferably, the ammonia supply branch pipe and the ammonia supply main pipe are respectively provided with a spare pneumatic valve, and the conveying connecting pipe is provided with a conveying valve.

[0008] Preferably, the outer wall of the ammonia supply main pipe is connected to a spare pipeline, one end of the spare pipeline is connected to the conveying connecting pipe, and a convenient hand valve is arranged on the spare pipeline.

[0009] Preferably, the flow meter is an electromagnetic flow meter, a gas discharge pipe is arranged on the ammonia supply main pipe beside the flow meter, and a gas discharge valve is installed on the gas discharge pipe.

[0010] Preferably, a monitoring box is installed on the conveying connecting pipe, a monitoring assembly is arranged on the monitoring box, the monitoring assembly includes an alarm and a gas pressure detector, the gas pressure detector is installed in the monitoring box, the detection end of the gas pressure detector is connected to the inside of the conveying connecting pipe, and the alarm is installed on the outer surface of the monitoring box and is electrically connected with the gas pressure detector.

[0011] Through the monitoring box and the monitoring assembly arranged on the conveying connecting pipe, the gas pressure in the pipeline can be monitored by the gas pressure detector, and when an abnormality occurs, the alarm can issue an alarm, so that the staff can timely repair and maintain.

[0012] Preferably, a display is installed on the front middle part of the monitoring box, and the display is electrically connected with the gas pressure detector.

[0013] Preferably, the outer part of the ammonia supply main pipe, the ammonia supply branch pipe and the conveying connecting pipe is provided with a reinforcing sleeve.

[0014] Preferably, the inner part of the ammonia supply main pipe, the ammonia supply branch pipe and the conveying connecting pipe is provided with a heat insulation layer, and the inner wall of the heat insulation layer is provided with a corrosion-resistant layer.

[0015] Through the reinforcing sleeve arranged on the ammonia supply main pipe and the ammonia supply branch pipe, the pressure resistance and bearing capacity can be improved, damage caused by accidents can be avoided, meanwhile, the inner wall of the ammonia supply main pipe and the ammonia supply branch pipe is provided with a corrosion-resistant layer, the corrosion resistance can be improved, so that the service life of the pipeline is improved.

[0016] Preferably, a fire arrester is mounted on the middle of the conveying connecting pipe.

[0017] Through the fire arrester, the spread of fire can be prevented, and safety is improved.

[0018] Beneficial effects:

[0019] The beneficial effects produced by the technical scheme of the utility model are as follows:

[0020] (1) The ammonia supply pipeline structure is connected to the boiler denitration system, ammonia gas can be generally conveyed through the ammonia supply main pipe, in the case of abnormal failure of the ammonia supply main pipe, the ammonia supply main pipe can be closed and the ammonia supply branch pipe can be opened for conveying, and the ammonia supply main pipe and the ammonia supply branch pipe are both provided with corresponding electric control valves and filters, so that the ammonia gas conveying effect can be improved.

[0021] (2) Through the monitoring box and the monitoring assembly arranged on the conveying connecting pipe, the air pressure inside the pipeline can be monitored through the air pressure detector, and when an abnormality occurs, the alarm can issue an alarm, so that the staff can timely overhaul and maintain.

[0022] (3) The reinforcing sleeve arranged on the ammonia supply main pipe and the ammonia supply branch pipe can improve the pressure resistance and pressure bearing capacity, avoid damage caused by accidents, and the inner walls of the ammonia supply main pipe and the ammonia supply branch pipe are provided with corrosion-resistant layers, so that the corrosion resistance can be improved, and the service life of the pipeline can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the basis of the drawings.

[0024] Fig. 1 It is the overall structure schematic view of the boiler denitration ammonia supply pipeline structure of the utility model;

[0025] Fig. 2 It is the internal structure schematic view of the monitoring box on the boiler denitration ammonia supply pipeline structure of the utility model;

[0026] Fig. 3 It is the internal structure schematic view of the ammonia supply main pipe on the boiler denitration ammonia supply pipeline structure of the utility model.

[0027] In the figure: 1, the main ammonia supply pipe; 2, the branch ammonia supply pipe; 3, the standby pipe; 4, the control total valve; 5, the pressure gauge; 6, the main valve; 7, the filter cartridge; 8, the branch valve; 9, the pneumatic valve; 10, the air release pipe; 11, the flow meter; 12, the monitoring box; 13, the flame arrester; 14, the delivery valve; 15, the convenient hand valve; 16, the display; 17, the alarm; 18, the gas ammonia mixer; 19, the air pressure detector; 20, the air release valve; 21, the reinforcing sleeve; 22, the heat insulation layer; 23, the corrosion-resistant layer; 24, the delivery connecting pipe. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0029] The ammonia supply pipe structure is connected to the boiler denitration system, ammonia gas can be generally delivered through the main ammonia supply pipe, in the case of abnormal failure of the main ammonia supply pipe, the main ammonia supply pipe can be closed and the branch ammonia supply pipe can be opened for delivery, and the main ammonia supply pipe and the branch ammonia supply pipe are both provided with corresponding electric control valves and filters, so that the ammonia gas delivery effect can be improved. The specific embodiments are as follows.

[0030] As shown in Figs. 1 to 3 A boiler denitration ammonia supply pipe structure, comprising a main ammonia supply pipe 1, a branch ammonia supply pipe 2 and a delivery connecting pipe 24, the main ammonia supply pipe 1 is provided with the branch ammonia supply pipe 2 outside, the branch ammonia supply pipe 2 and the main ammonia supply pipe 1 are jointly connected with the delivery connecting pipe 24, the outlet end of the delivery connecting pipe 24 is provided with a gas ammonia mixer 18 connected to the boiler denitration equipment, the connection between the main ammonia supply pipe 1 and the delivery connecting pipe 24 is provided with a flow meter 11, the main ammonia supply pipe 1 and the branch ammonia supply pipe 2 are respectively provided with a main valve 6 and a branch valve 8, and the middle parts of the main ammonia supply pipe 1 and the branch ammonia supply pipe 2 are both provided with filter cartridges 7. The ammonia supply pipe structure is connected to the boiler denitration system, ammonia gas can be generally delivered through the main ammonia supply pipe 1, in the case of abnormal failure of the main ammonia supply pipe 1, the main ammonia supply pipe 1 can be closed and the branch ammonia supply pipe 2 can be opened for delivery, and the main ammonia supply pipe 1 and the branch ammonia supply pipe 2 are both provided with corresponding electric control valves and filter cartridges 7, so that the ammonia gas delivery effect can be improved.

[0031] The inlet end of the ammonia supply main pipe 1 is externally connected with an ammonia source, and a control main valve 4 and a pressure gauge 5 are sequentially arranged near the position of the inlet end of the ammonia supply main pipe 1. By controlling the control main valve 4, the entire ammonia supply pipeline can be controlled, and under the action of the pressure gauge 5, the ammonia supply pressure of the pipeline can be monitored, which is convenient for staff control.

[0032] The ammonia supply branch pipe 2 and the ammonia supply main pipe 1 are respectively provided with a spare pneumatic valve 9, and the delivery connecting pipe 24 is provided with a delivery valve 14. By the pneumatic valve 9 and the delivery valve 14, the ammonia supply process on the ammonia supply main pipe 1, the ammonia supply branch pipe 2 and the delivery connecting pipe 24 can be controlled multiple times, which is convenient for improving the stability of pipeline delivery

[0033] The outer wall of the ammonia supply main pipe 1 is connected with a spare pipeline 3, the outlet end of the spare pipeline 3 is connected with the delivery connecting pipe 24 near one end of the spare pipeline 3, and the spare pipeline 3 is provided with a convenient hand valve 15.

[0034] The flow meter 11 is an electromagnetic flow meter, the ammonia supply main pipe 1 beside the flow meter 11 is provided with a gas discharge pipe 10, and the gas discharge pipe 10 is provided with a gas discharge valve 20. By the flow meter 11, the ammonia supply flow can be monitored, which is convenient for recording and management, and by the gas discharge pipe 10 and the gas discharge valve 20, the air can be emptied before ammonia supply, so as to avoid affecting ammonia delivery and delivery quality.

[0035] The delivery connecting pipe 24 is provided with a monitoring box 12, the monitoring box 12 is provided with a monitoring assembly, the monitoring assembly includes an alarm 17 and a gas pressure detector 19, the gas pressure detector 19 is installed in the monitoring box 12, the detection end of the gas pressure detector 19 is connected with the inside of the delivery connecting pipe 24, and the alarm 17 is installed on the outer surface of the monitoring box 12 and is electrically connected with the gas pressure detector 19. By the monitoring box 12 and the monitoring assembly arranged on the delivery connecting pipe 24, the gas pressure in the pipeline can be monitored by the gas pressure detector 19, and when it is abnormal, the alarm 17 can give an alarm, which is convenient for staff to timely repair and maintenance.

[0036] A display 16 is installed on the front middle part of the monitoring box 12, and the display 16 is electrically connected with the gas pressure detector 19. By the display 16, the gas pressure data can be displayed, which is convenient for staff to check.

[0037] The outer parts of the ammonia supply main pipe 1, the ammonia supply branch pipe 2 and the delivery connecting pipe 24 are provided with reinforcing sleeves 21. By the reinforcing sleeves 21 arranged on the ammonia supply main pipe 1 and the ammonia supply branch pipe 2, the pressure resistance and bearing capacity can be improved, and damage caused by accidents can be avoided.

[0038] The inside of the ammonia supply main pipe 1, the ammonia supply branch pipe 2 and the conveying connecting pipe 24 is provided with a heat insulation layer 22, and the inner wall of the heat insulation layer 22 is provided with a corrosion-resistant layer 23. The heat insulation layer 22 arranged in the inside of the ammonia supply main pipe 1 and the ammonia supply branch pipe 2 can reduce the influence of temperature on ammonia gas conveying and improve conveying stability, and the inner wall of the ammonia supply main pipe 1 and the ammonia supply branch pipe 2 is provided with the corrosion-resistant layer 23, so that the corrosion resistance is improved, thereby prolonging the service life of the pipes.

[0039] The middle part of the conveying connecting pipe 24 is provided with a flame arrester 13. The flame arrester 13 can prevent flame propagation and improve safety. The flame arrester is a safety device for preventing the flame of flammable gas and flammable liquid vapor from spreading. It is generally installed in a pipe conveying flammable gas or a vented tank to prevent the flame (deflagration or detonation) from spreading through the device, which is composed of a flame arrester core, a flame arrester shell and accessories.

[0040] Working principle: The ammonia supply pipe structure is connected to the boiler denitration system. Generally, ammonia gas is conveyed through the ammonia supply main pipe. In the case of abnormal failure of the ammonia supply main pipe, the ammonia supply branch pipe can be opened for conveying. At the same time, the ammonia supply main pipe and the ammonia supply branch pipe are provided with corresponding electric control valves and filters, which can improve the ammonia gas conveying effect. The monitoring box and the monitoring assembly arranged on the conveying connecting pipe can monitor the gas pressure in the pipe through the gas pressure detector. In the case of abnormality, the alarm can issue an alarm to facilitate timely maintenance and repair by the staff. The reinforcing sleeve arranged on the ammonia supply main pipe and the ammonia supply branch pipe can improve the pressure resistance and pressure bearing capacity to avoid damage caused by accidents. At the same time, the inner wall of the ammonia supply main pipe and the ammonia supply branch pipe is provided with a corrosion-resistant layer, which can improve the corrosion resistance and prolong the service life of the pipes.

[0041] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A boiler denitration ammonia supply pipe structure, characterized by, The utility model provides an ammonia supply device, which comprises an ammonia supply main pipe (1), an ammonia supply branch pipe (2) and a conveying connecting pipe (24), the outer part of the ammonia supply main pipe (1) is provided with the ammonia supply branch pipe (2), the ammonia supply branch pipe (2) and the ammonia supply main pipe (1) are jointly connected with the conveying connecting pipe (24), the outlet end of the conveying connecting pipe (24) is provided with a gas ammonia mixer (18) connected with a boiler denitration equipment, the connecting part of the ammonia supply main pipe (1) and the conveying connecting pipe (24) is provided with a flowmeter (11), the ammonia supply main pipe (1) and the ammonia supply branch pipe (2) are respectively provided with a main valve (6) and a branch valve (8), and the middle parts of the ammonia supply main pipe (1) and the ammonia supply branch pipe (2) are respectively provided with a filter cartridge (7).

2. The ammonia supply pipeline structure for boiler denitration according to claim 1, characterized in that, The inlet end of the ammonia supply main pipe (1) is externally connected with an ammonia source, and a control total valve (4) and a pressure gauge (5) are sequentially arranged near the inlet end of the ammonia supply main pipe (1).

3. The ammonia supply pipeline structure for boiler denitration according to claim 1, characterized in that, The ammonia supply branch pipe (2) and the ammonia supply main pipe (1) are respectively provided with a spare pneumatic valve (9), and the conveying connecting pipe (24) is provided with a conveying valve (14).

4. The ammonia supply pipeline structure for boiler denitration according to claim 1, characterized in that, The outer wall of the ammonia supply main pipe (1) is connected with a spare pipeline (3), one end of the spare pipeline (3) is connected with the conveying connecting pipe (24) near the spare pipeline (3), and the spare pipeline (3) is provided with a convenient hand valve (15).

5. The ammonia supply pipeline structure for boiler denitration according to claim 1, characterized in that, The flowmeter (11) is an electromagnetic flowmeter, a gas discharge pipe (10) is arranged on the ammonia supply main pipe (1) on one side of the flowmeter (11), and a gas discharge valve (20) is arranged on the gas discharge pipe (10).

6. The ammonia supply pipeline structure for boiler denitration according to claim 1, characterized in that, A monitoring box (12) is arranged on the conveying connecting pipe (24), a monitoring assembly is arranged on the monitoring box (12), the monitoring assembly comprises an alarm (17) and a gas pressure detector (19), the gas pressure detector (19) is arranged in the monitoring box (12), the detection end of the gas pressure detector (19) is connected with the inside of the conveying connecting pipe (24), and the alarm (17) is arranged on the outer surface of the monitoring box (12) and is electrically connected with the gas pressure detector (19).

7. The ammonia supply pipeline structure for boiler denitration according to claim 6, characterized in that, A display (16) is arranged on the front middle part of the monitoring box (12), and the display (16) is electrically connected with the gas pressure detector (19).

8. The ammonia supply pipeline structure for boiler denitration according to claim 1, characterized in that, The outer parts of the ammonia supply main pipe (1), the ammonia supply branch pipe (2) and the conveying connecting pipe (24) are provided with reinforcing sleeve pipes (21).

9. The ammonia supply pipeline structure for boiler denitration according to claim 1, characterized in that, The inner parts of the ammonia supply main pipe (1), the ammonia supply branch pipe (2) and the conveying connecting pipe (24) are provided with heat insulation layers (22), and the inner walls of the heat insulation layers (22) are provided with corrosion-resistant layers (23).

10. The ammonia supply pipeline structure for boiler denitration according to claim 1, characterized in that, A fire arrester (13) is arranged on the middle part of the conveying connecting pipe (24).

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