CN215742844U

CN215742844U - Automatic ammonia water adding device for starting small denitration system of boiler

Info

Publication number: CN215742844U
Application number: CN202123120455.1U
Authority: CN
Inventors: 王国平; 蔡洪生
Original assignee: Ccdi Zunhua Thermal Power Co ltd
Current assignee: Ccdi Zunhua Thermal Power Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-02-08
Anticipated expiration: 2031-12-14

Abstract

The utility model discloses an ammonia water automatic adding device for starting a small denitration system of a boiler, which comprises a plurality of ammonia water buckets and an ammonia water storage tank, wherein the ammonia water buckets are arranged on the ammonia water storage tank; the ammonia water buckets are all positioned above the ammonia water storage tank; an inverted U-shaped pipe is arranged between the ammonia water bucket and the ammonia water storage tank. According to the utility model, due to the arrangement of the plurality of branch pipes and the multi-pipeline connectors, ammonia water in the plurality of ammonia water buckets can be added into the ammonia water storage tank at the same time, so that the ammonia water adding speed is increased; the inlet pipeline, the outlet pipeline and the first connecting pipeline form an inverted U-shaped pipe, height difference exists between the ammonia water bucket and the ammonia water storage tank, automatic addition of the ammonia water is realized by utilizing a siphon principle, the problems that manual labor intensity is high, the pouring process is easy to spill liquid to damage skin, the equipment environment is polluted, people need to wear a positive pressure respirator to operate, ammonia unloading cannot be continuously carried out, strong odor is generated, the environment is polluted and the like are solved, and safe, environment-friendly and efficient ammonia water loading and unloading are realized.

Description

Automatic ammonia water adding device for starting small denitration system of boiler

Technical Field

The utility model belongs to the field of denitration, and particularly relates to an automatic ammonia water adding device for starting a small denitration system of a boiler.

Background

Most of starting boilers of coal-fired power plants are small-capacity oil-fired boilers, and the ultra-low emission modification of the starting boilers is mainly denitration modification. Because the boiler capacity is small, and the required reductant quantity of denitration is low, so it is more convenient mode to select aqueous ammonia as the reductant. The material loading and unloading of the small denitration system using the ammonia water as the reducing agent mainly comprises the step of purchasing an ammonia water barrel with the mass solubility of 25%, and pouring the ammonia water barrel into a storage tank of the denitration system manually. At present, 1 36T fuel oil starting boiler of a thermal power and electric power company has been constructed and adopted to complete SCR denitration transformation, ammonia water is used as a reducing agent in a system, and the maximum using amount of the reducing agent is 30L/h in the starting process of a main unit. When the deNOx systems was put into operation, the aqueous ammonia bucket that the mass concentration was 25% was emptyd to aqueous ammonia storage jar through the manual work in. However, the following problems actually exist during pouring: 1) the labor intensity of workers is high, and two workers are required to add the materials in turn; 2) the liquid is easy to be sprinkled in the pouring process, the skin is damaged, and the equipment environment is polluted; 3) the personnel need to wear the positive pressure respirator, the operation is complex, and the continuous operation cannot be carried out; 4) it will produce strong smell and pollute the environment.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides an automatic ammonia water adding device for starting a small denitration system of a boiler, which utilizes the siphon principle to realize the automatic conveying of an ammonia water barrel to an ammonia water storage tank, and solves the problems of high labor intensity, easy liquid sprinkling and damage to skin during pouring, equipment environment pollution, incapability of continuously unloading ammonia due to the fact that personnel need to wear a positive pressure respirator for operation, strong odor generation, environment pollution and the like.

The technical scheme of the utility model is realized as follows:

an ammonia water automatic adding device for starting a small denitration system of a boiler comprises a plurality of ammonia water buckets and an ammonia water storage tank; the ammonia water buckets are all positioned above the ammonia water storage tank; an inverted U-shaped pipe is arranged between the ammonia water bucket and the ammonia water storage tank;

the inverted U-shaped pipe comprises an inlet pipeline, an outlet pipeline inserted into the ammonia water storage tank and a first connecting pipeline connected with the inlet pipeline and the outlet pipeline; the inlet pipeline comprises branch pipes inserted into the bottom in the ammonia water bucket and a main pipe connected with the first connecting pipeline, and the main pipe is connected with the branch pipes through multi-pipeline connectors; a second connecting pipeline and a first ball valve are sequentially arranged on the outlet pipeline according to the flowing direction of the ammonia water; a second ball valve is arranged on the second connecting pipeline, and one end of the second connecting pipeline far away from the outlet pipeline is connected with a desalination system;

the multi-pipeline connector comprises a connecting seat, wherein a cavity, a plurality of inlet connectors and an outlet connector are arranged in the connecting seat, and the inlet connectors and the outlet connectors are communicated with the cavity; a third ball valve is arranged on each of the inlet connectors; the outlet connector is communicated with the main pipe, and the inlet connector is communicated with the branch pipe.

Furthermore, the branch pipes, the main pipe, the first connecting pipeline and the outlet pipeline are all stainless steel pipes.

Furthermore, a stainless steel hose is arranged between the branch pipe and the multi-pipeline connector.

Further, still include and deposit the platform, a plurality of the ammonia bucket all places deposit the bench.

Furthermore, a flash tank is arranged on the outlet pipeline between the second connecting pipeline and the first ball valve.

Furthermore, the flash tank comprises a flash tank body, wherein a liquid inlet is formed in the top of the flash tank body, and a liquid outlet is formed in the bottom of the flash tank body; the outer diameter of the flash tank body is larger than that of the outlet pipeline.

Furthermore, the first ball valve, the second ball valve and the third ball valve are all electromagnetic ball valves.

Furthermore, the first ball valve, the second ball valve and the third ball valve each comprise a valve ball, each valve ball is correspondingly and rotatably connected in the inlet joint, the outlet pipeline and the second connecting pipeline, and the outer diameter of each valve ball is respectively matched with the inner diameter of the corresponding inlet joint, the corresponding outlet pipeline and the corresponding second connecting pipeline; a circulation channel for ammonia water to circulate is formed in the valve ball; valve covers are fixedly arranged on the outer walls of the inlet joint, the outlet pipeline and the second connecting pipeline corresponding to the valve balls respectively, and through holes for inserting valve rods are formed in the valve covers; one end of the valve rod penetrates through the through hole to be fixedly connected with the valve ball, and the other end of the valve rod extends out of the valve cover to be fixedly connected with the rotating handle; and a sealing ring is arranged between the valve rod and the through hole.

The utility model discloses an automatic ammonia water adding device for starting a small denitration system of a boiler, which has the following advantages:

1) the inlet pipeline, the outlet pipeline and the first connecting pipeline form an inverted U-shaped pipe, height difference exists between the ammonia water bucket and the ammonia water storage tank, automatic addition of the ammonia water is realized by utilizing a siphon principle, the problems that manual labor intensity is high, the pouring process is easy to spill liquid to damage skin, the equipment environment is polluted, people need to wear a positive pressure respirator to operate, ammonia unloading cannot be continuously carried out, strong odor is generated, the environment is polluted and the like are solved, and safe, environment-friendly and efficient ammonia water loading and unloading are realized.

2) The setting of a plurality of branch pipes, multi-channel connector can make the aqueous ammonia in a plurality of ammonia buckets add to aqueous ammonia storage jar simultaneously, improves aqueous ammonia rate of addition.

3) Through setting up the third ball valve at every access connection, the interior ammonia water flow of adjustable every way branch pipe on the one hand, on the other hand is discharged the back at the aqueous ammonia in an ammonia cask, closes the third ball valve on this branch pipe, changes the ammonia cask, because other pipeline siphon effects are still continuing, consequently change the ammonia cask, can not lead to siphon effect to break off the influence and unload ammonia.

Drawings

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

FIG. 2 is a schematic view showing the structure of a multi-pipe joint (a rotary handle is a rotating lever);

FIG. 3 is a schematic view of the structure of the multi-channel joint (the rotary knob is a rotary knob);

fig. 4 is a sectional view of a third ball valve.

In the figure:

1. an ammonia water tank; 2. an ammonia water storage tank; 3. an inlet duct; 4. an outlet conduit; 5. a first connecting pipe; 6. a second connecting pipe; 7. a branch pipe; 8. a main pipe; 9. a multi-pipe connector; 10. a first ball valve; 11. a second ball valve; 12. a flash tank; 13. a storage table; 14. a stainless steel hose; 15. a third ball valve; 16. a connecting seat; 17. an inlet fitting; 18. an outlet fitting; 19. a valve ball; 20. a valve stem; 21. a valve cover; 22. a flow-through channel; 23. a seal ring; 24. a knob; 25. rotating the rod.

Detailed Description

The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1 to 4, an ammonia water automatic adding device for starting a small denitration system of a boiler provided by the embodiment of the utility model comprises a plurality of ammonia water buckets 1 and an ammonia water storage tank 2; the ammonia water buckets 1 are all positioned above the ammonia water storage tank 2; an inverted U-shaped pipe is arranged between the ammonia water barrel 1 and the ammonia water storage tank 2. There is the difference in height between ammonia water bucket 1, the ammonia water storage jar 2 the two, through adopting the type of falling U pipe, utilizes siphon principle to realize that ammonia water bucket 1 is automatic to be carried to ammonia water storage jar 2. It should be noted that, the utility model has no special limitation on the structural mode of holding and fixing the inverted U-shaped tube, and the inverted U-shaped tube is prevented from falling down by holding the inverted U-shaped structure by the conventional fixing mode in the field. When the support is used specifically, the support can be adopted to fix and maintain the inverted U-shaped structure of the inverted U-shaped pipe.

The inverted U-shaped pipe comprises an inlet pipeline 3, an outlet pipeline 4 inserted into the ammonia water storage tank 2 and a first connecting pipeline 5 connected with the inlet pipeline 3 and the outlet pipeline 4; the inlet pipeline 3 comprises a branch pipe 7 inserted into the bottom in the ammonia water barrel 1, the ammonia water in the ammonia water barrel 1 can be completely discharged by inserting the branch pipe 7 into the bottom in the ammonia water barrel 1, and a main pipe 8 connected with the first connecting pipeline 5 is connected between the main pipe 8 and a plurality of branch pipes 7 through a plurality of pipeline connectors 9; a second connecting pipeline 6 and a first ball valve 10 are sequentially arranged on the outlet pipeline 4 according to the flowing direction of ammonia water; the second connecting pipe 6 is provided with a second ball valve 11. Close first ball valve 10, open second ball valve 11, demineralized water in the demineralized water system passes through second connecting tube 6, enter into first connecting tube 5, inlet pipe says 3, first connecting tube 5, inlet pipe says 3 and is full of behind the demineralized water, close second ball valve 11, open first ball valve 10, just so form the siphon effect, need not artifical additive aqueous ammonia, the aqueous ammonia is automatic inhales to aqueous ammonia storage jar 2 from aqueous ammonia bucket 1 in, it is big to have solved artifical intensity of labour, it spills liquid damage skin easily to empty the process, the polluted equipment environment, personnel need wear the malleation respirator operation and lead to unloading ammonia work and can't last going on, produce strong smell, the polluted environment scheduling problem. The arrangement of the branch pipes 7 and the multi-pipeline connectors 9 can enable the ammonia water in the ammonia water buckets 1 to be added into the ammonia water storage tanks 2 at the same time, and the ammonia water adding speed is increased.

The multi-pipeline connector 9 comprises a connecting seat 16, wherein a cavity is formed in the connecting seat 16, and a plurality of inlet connectors 17 and an outlet connector 18 which are communicated with the cavity; a plurality of inlet joints 17 are provided with third ball valves 15; the outlet connection 18 communicates with the main pipe 8; the inlet connection 17 is connected to the branch pipe 7. Through setting up third ball valve 15 at every inlet connection 17, on the one hand can adjust the interior aqueous ammonia flow of every branch pipe 7, on the other hand is after the aqueous ammonia in an aqueous ammonia bucket 1 is unloaded, closes the third ball valve 15 on this branch pipe 7, changes the aqueous ammonia bucket 1, can continue the siphonage, does not influence and unloads ammonia. Wherein, the number of the inlet joints 17 and the number of the branch pipes 7 are consistent with the number of the ammonia water barrels 1.

It should be noted that when the ammonia water in the ammonia water tank 1 is discharged, part of the air is sucked into the pipeline (the branch pipe 7, the multi-pipeline connector 9, the main pipe 8, the first connecting pipeline 5, the outlet pipeline 4, etc.), which causes the siphon effect to be weakened, in order to close the third ball valve 15 in time and replace the ammonia water tank 1, in a specific application, a liquid level meter can be inserted into the ammonia water tank 1, and the third ball valve 15 is closed according to the liquid level of the ammonia water in the ammonia water tank 1; meanwhile, an observation window can be arranged on the outer wall of the ammonia water barrel 1 to observe the liquid level of the ammonia water in the ammonia water barrel 1.

In this embodiment, the first ball valve 10, the second ball valve 11, and the third ball valve 15 may all be electromagnetic ball valves. When the electromagnetic ball valve is specifically applied, the electromagnetic ball valve is a DN20 stainless steel ball valve. Or, the first ball valve 10, the second ball valve 11, and the third ball valve 15 have the same structure, and referring to fig. 4, each ball valve includes a ball valve 19, each ball valve 19 is rotatably connected to the inlet joint 17, the outlet pipe 4, and the second connecting pipe 6, and the outer diameter of each ball valve 19 is respectively adapted to the inner diameter of the corresponding inlet joint 17, the corresponding outlet pipe 4, and the corresponding second connecting pipe 6; a flow passage 22 for ammonia water to flow is arranged on the valve ball 19; the outer walls of the inlet joint 17, the outlet pipeline 4 and the second connecting pipeline 6 corresponding to the valve balls 19 are respectively and fixedly provided with a valve cover 21, and the valve cover 21 is provided with a through hole for the valve rod 20 to penetrate through; one end of the valve rod 20 passes through the through hole and is fixedly connected with the valve ball 19, and the other end of the valve rod extends out of the valve cover 21 and is fixedly connected with the rotating handle; a sealing ring 23 is arranged between the valve stem 20 and the through hole. The state of the third ball valve 15 can be adjusted by rotating the rotating handle, when the central axis of the circulation channel 22 is perpendicular to the central axis of the inlet joint 17, the outlet pipeline 4 or the second connecting pipeline 6, the third ball valve 15 is in a closed state, and no ammonia water circulates; when the central axis of the flow passage 22 and the central axis of the inlet joint 17, the outlet pipeline 4 or the second connecting pipeline 6 are smaller than 90 degrees, the third ball valve 15 is in an open state, and when the central axis of the flow passage 22 and the central axis of the inlet joint 17 are the same, the flow of ammonia water is the largest.

Wherein, the rotary handle can be a knob 24 (see fig. 3) or a rotary rod 25 (see fig. 2), and the rotary handle can be sleeved on the valve rod 20 and forms a spline connection fit with the valve rod 20; or the bottom of the rotating handle is fixedly connected with the valve rod 20.

It should be noted that, the rotating handle is provided with a switch mark, so that the worker can intuitively know the function of the rotating handle.

The ammonia water has certain corrosivity, and in order to avoid corrosion of the ammonia water on the pipeline, in the embodiment, the plurality of branch pipes 7, the main pipe 8, the first connecting pipeline 5 and the outlet pipeline 4 are all stainless steel pipes; the multi-pipe connector 9 is made of stainless steel. In a specific practical application, the branch pipes 7, the main pipe 8, the first connecting pipeline 5 and the outlet pipeline 4 are all DN20 stainless steel pipes.

In this embodiment, a stainless steel hose 14 is disposed between the branch pipe 7 and the multi-pipe connector 9, and in a specific practical application, the stainless steel hose 14 is a DN20 stainless steel hose. The stainless steel hose 14 can increase the siphon effect on the one hand, and on the other hand is favorable to inserting branch pipe 7 into ammonia water bucket 1 or taking out from ammonia water bucket 1 when changing the ammonia water.

The present invention is not limited to the manner in which the plurality of ammonia water buckets 1 are all located above the ammonia water storage tank 2. In a specific application, a plurality of ammonia water buckets 1 can be placed on the storage table 13.

In this embodiment, a flash tank 12 is provided on the outlet pipe 4 between the second connecting pipe 6 and the first ball valve 10. The flash tank 12 functions to expand the volume and reduce the pressure, so that the ammonia gas is fully dissolved in the water.

In this embodiment, the flash tank 12 includes a flash tank body, a liquid inlet is disposed at the top of the flash tank body, and a liquid outlet is disposed at the bottom of the flash tank body; the external diameter of flash vessel body is greater than the external diameter of nonrust steel pipe. In particular, the flash tank 12 is a DN50 stainless steel tube flash tank.

It should be noted that the present invention does not limit the connection manner between the pipes (the branch pipe 7, the multi-pipe connector 9, the main pipe 8, the first connecting pipe 5, the outlet pipe 4, etc.), and the connection manner between the pipes and the multi-pipe connector 9, and may adopt a conventional connection manner in the art, such as welding or screwing.

The work flow of the present invention is explained in conjunction with fig. 1: when needing loading and unloading aqueous ammonia, on placing storage platform 13 with a plurality of ammonia bucket 1, guarantee that a plurality of ammonia bucket 1 all is located aqueous ammonia storage jar 2 tops, insert corresponding aqueous ammonia bucket 1 bottom with a plurality of branch pipes 7, outlet pipe 4 installs on aqueous ammonia storage jar 2. Close first ball valve 10, open second ball valve 11 and a plurality of third ball valve 15, after branch pipe 7, the person in charge 8, first connecting tube 5, second connecting tube 6, flash vessel 12 are full of demineralized water, close second ball valve 11, open first ball valve 10, form the siphon effect, the aqueous ammonia in the aqueous ammonia bucket 1 is automatic inhales to aqueous ammonia storage jar 2 in. After the ammonia water in the ammonia water barrel 1 is discharged, the corresponding third ball valve 15 is closed, the ammonia water barrel 1 is replaced, the branch pipe 7 is inserted into the third ball valve 15, and the ammonia discharging is continued.

The above detailed description is merely illustrative of possible embodiments of the present invention and is not intended to limit the scope of the utility model, which is intended to include all equivalent embodiments or modifications within the scope of the present invention without departing from the technical spirit of the present invention.

Claims

1. An automatic ammonia water adding device for starting a small denitration system of a boiler is characterized by comprising a plurality of ammonia water buckets (1) and an ammonia water storage tank (2); the ammonia water buckets (1) are all positioned above the ammonia water storage tank (2); an inverted U-shaped pipe is arranged between the ammonia water bucket (1) and the ammonia water storage tank (2);

the inverted U-shaped pipe comprises an inlet pipeline (3), an outlet pipeline (4) inserted into the ammonia water storage tank (2) and a first connecting pipeline (5) connected with the inlet pipeline (3) and the outlet pipeline (4); the inlet pipeline (3) comprises branch pipes (7) inserted into the bottom in the ammonia water barrel (1) and a main pipe (8) connected with the first connecting pipeline (5), and the main pipe (8) is connected with the branch pipes (7) through a multi-pipeline connector (9); a second connecting pipeline (6) and a first ball valve (10) are sequentially arranged on the outlet pipeline (4) according to the flowing direction of ammonia water; a second ball valve (11) is arranged on the second connecting pipeline (6), and one end of the second connecting pipeline (6) far away from the outlet pipeline (4) is connected with a desalination system;

the multi-pipeline connector (9) comprises a connecting seat (16), wherein a cavity, a plurality of inlet connectors (17) and an outlet connector (18) which are communicated with the cavity are arranged in the connecting seat (16); a plurality of inlet joints (17) are provided with third ball valves (15); the outlet connector (18) is communicated with the main pipe (8), and the inlet connector (17) is communicated with the branch pipe (7).

2. The ammonia water automatic adding device for starting the small denitration system of the boiler according to claim 1, wherein the plurality of branch pipes (7), the main pipe (8), the first connecting pipeline (5) and the outlet pipeline (4) are all stainless steel pipes.

3. The automatic ammonia water adding device for starting the small denitration system of the boiler according to claim 1, wherein a stainless steel hose (14) is arranged between the branch pipe (7) and the multi-pipeline connector (9).

4. The automatic ammonia water adding device for starting the small denitration system of the boiler according to claim 1, further comprising a storage table (13), wherein a plurality of ammonia water buckets (1) are placed on the storage table (13).

5. The ammonia water automatic adding device for starting the small denitration system of the boiler according to claim 1, characterized in that a flash tank (12) is arranged on the outlet pipeline (4) between the second connecting pipeline (6) and the first ball valve (10).

6. The automatic ammonia water adding device for starting the small denitration system of the boiler as claimed in claim 5, wherein the flash tank (12) comprises a flash tank body, the top of the flash tank body is provided with a liquid inlet, and the bottom of the flash tank body is provided with a liquid outlet; the outer diameter of the flash tank body is larger than that of the outlet pipeline (4).

7. The automatic ammonia water adding device for starting the small denitration system of the boiler according to claim 1, wherein the first ball valve (10), the second ball valve (11) and the third ball valve (15) are all electromagnetic ball valves.

8. The ammonia water automatic adding device for starting the small denitration system of the boiler according to claim 1, wherein the first ball valve (10), the second ball valve (11) and the third ball valve (15) each comprise a valve ball (19), each valve ball (19) is rotatably connected in the inlet joint (17), the outlet pipeline (4) and the second connecting pipeline (6) correspondingly, and the outer diameter of each valve ball (19) is respectively matched with the inner diameter of the corresponding inlet joint (17), the corresponding outlet pipeline (4) and the corresponding second connecting pipeline (6); a circulation channel (22) for ammonia water to circulate is formed in the valve ball (19); valve covers (21) are fixedly arranged on the outer walls of the inlet joint (17), the outlet pipeline (4) and the second connecting pipeline (6) corresponding to the valve balls (19), and through holes for inserting valve rods (20) are formed in the valve covers (21); one end of the valve rod (20) penetrates through the through hole to be fixedly connected with the valve ball (19), and the other end of the valve rod extends out of the valve cover (21) to be fixedly connected with the rotary handle; and a sealing ring (23) is arranged between the valve rod (20) and the through hole.