CN212395886U

CN212395886U - Ammonia evaporation device for denitration system

Info

Publication number: CN212395886U
Application number: CN202020563130.7U
Authority: CN
Inventors: 陈桂军; 陶富荣
Original assignee: Jiangsu Zhongzhong Electric Heating Technology Co ltd
Current assignee: Jiangsu Zhongzhong Electric Heating Technology Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-01-26
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses an ammonia evaporation device for a denitration system, which comprises an evaporation pipe, a coil pipe and a liquid ammonia pipe; the coil pipe is arranged in the evaporation pipe, the liquid ammonia pipe is arranged in the coil pipe, a steam inlet is arranged on the side part of the evaporation pipe, a high-speed ejector is arranged in the evaporation pipe, and the high-speed ejector is connected with the steam inlet; the coil pipe is provided with a liquid ammonia inlet, the liquid ammonia pipe is provided with a gas ammonia outlet, the liquid ammonia pipe is provided with a liquid level switch, the liquid ammonia pipe is provided with a liquid nitrogen discharge port, and the end part of the evaporation pipe is provided with a flange cover; the utility model discloses a set up the coil pipe at the evaporating pipe, the liquid ammonia pipe is established in the coil pipe, avoids producing vibration and water hammer phenomenon, can not lead to the desolder, improve equipment practical life.

Description

Ammonia evaporation device for denitration system

Technical Field

The utility model relates to an ammonia evaporation plant for deNOx systems belongs to ammonia evaporation technical field.

Background

In the liquid ammonia evaporator in the prior art, steam is directly sprayed into water to be heated, so that liquid ammonia is evaporated into ammonia gas, the principle of flue gas denitration is that NO is oxidized into NO2 by using an oxidizing agent, the generated NO2 is absorbed by water or an alkaline solution, so that denitration is realized, ammonia is mainly used as a reducing agent for flue gas denitration of a thermal power plant, and nitrogen oxide is converted into harmless nitrogen gas and water vapor by ammonia; the ammonia gas is mainly formed by evaporating liquid ammonia; in the prior art, the ammonia evaporation device is easy to generate vibration and water hammer phenomena, so that the device is easy to be detached and damaged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the ammonia evaporation plant in the prior art and produce the vibration easily and water hammer phenomenon leads to the device to desolder easily and causes the not enough of equipment damage, provides an ammonia evaporation plant for deNOx systems.

An ammonia evaporation device for a denitration system comprises an evaporation pipe, a coil pipe and a liquid ammonia pipe; the coil pipe is arranged in the evaporation pipe, the liquid ammonia pipe is arranged in the coil pipe, a steam inlet is arranged on the side part of the evaporation pipe, a high-speed ejector is arranged in the evaporation pipe, and the high-speed ejector is connected with the steam inlet; the coil pipe is equipped with the liquid ammonia import, the liquid ammonia pipe is equipped with the export of gas ammonia, the liquid ammonia pipe is equipped with liquid level switch, the liquid ammonia pipe is equipped with the liquid nitrogen discharge port, the evaporimeter pipe tip is equipped with the blind flange.

Preferably, a floating ball is arranged in the liquid ammonia pipe.

Preferably, the side of the evaporation tube is further provided with a water level gauge and a service drain.

Preferably, the liquid ammonia pipe is provided with a thermometer, a pressure gauge and a safety valve in sequence.

Preferably, the top end of the side part of the evaporation tube is provided with an overflow port.

Preferably, a pressure gauge is further arranged at the liquid ammonia inlet.

Preferably, a thermometer and a gasification meter are arranged at the top of the evaporation tube.

Preferably, the bottom of the evaporation tube is provided with a support leg.

Compared with the prior art, the utility model discloses the beneficial effect who reaches:

(1) the utility model adopts the porous spraying, the thermal efficiency is high, and the heat loss is small;

(2) the utility model discloses a set up the coil pipe at the evaporating pipe, the liquid ammonia pipe is established in the coil pipe, avoids producing vibration and water hammer phenomenon, can not lead to the desolder, improve equipment practical life.

Drawings

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

in the figure: 1. an evaporation tube; 2. a coil pipe; 3. a liquid ammonia inlet; 4. a floating ball; 5. a flange cover; 6. a steam inlet; 7. a high-speed ejector; 8. a gas ammonia outlet; 9. a gasification meter; 10. a pressure gauge; 11. a water level detector; 12. a liquid nitrogen discharge port; 13. a support leg; 14. an overflow port; 15. overhauling the discharge port; 16. a thermometer; 18. A liquid level switch; 19. a safety valve; 20. a liquid ammonia tube.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

As shown in fig. 1, an ammonia vaporizing device for a denitration system is disclosed, comprising a vaporizing tube 1, a coil 2 and a liquid ammonia tube 20; the coil 2 is arranged in the evaporation tube 1, the liquid ammonia tube 20 is arranged in the coil 2, the side part of the evaporation tube 1 is provided with a steam inlet 6, the evaporation tube 1 is internally provided with a high-speed ejector 7, and the high-speed ejector 7 is connected with the steam inlet 6; the coil pipe 2 is provided with a liquid ammonia inlet 3, the liquid ammonia pipe 20 is provided with a gas ammonia outlet 8, the liquid ammonia pipe 20 is provided with a liquid level switch 18, the liquid ammonia pipe 20 is provided with a liquid nitrogen discharge port 12, and the end part of the evaporation pipe 1 is provided with a flange cover 5; the top of the evaporation tube 1 is provided with a thermometer 16 and a gasifier 9, and the bottom of the evaporation tube 1 is provided with a supporting leg 13.

In this embodiment, a floating ball 4 is disposed in the liquid ammonia tube 20, and if the liquid ammonia is not vaporized, a certain height is reached through the design of the floating ball 4, and the floating ball closes the liquid ammonia inlet.

In this embodiment, the side of the evaporation tube 1 is further provided with a water level detector 11 and a maintenance discharge port 15, the water level detector 11 is used for observing the water level inside the casing to prevent dehydration; the maintenance discharge port 15 facilitates maintenance.

In this embodiment, the liquid ammonia pipe 20 is sequentially provided with a thermometer 16, a pressure gauge 10 and a safety valve 19, so that even if the internal temperature is observed and the liquid ammonia pipe is heated, the safety valve 19 and the pressure gauge 16 prevent danger caused by excessive pressure, so that the pressure is discharged, and the potential safety hazard is eliminated.

In this embodiment, the top end of the side of the evaporation tube 1 is provided with an overflow port 14 to prevent excessive water from being added into the housing to generate pressure.

In this embodiment, liquid ammonia import 3 department still is equipped with pressure gauge 10, conveniently observes pressure when the feed liquor nitrogen.

During operation, liquid nitrogen flows in the coil 2 after entering from the liquid ammonia inlet 3 and is heated to about 40-50 ℃ to be converted into gaseous ammonia, the gaseous ammonia flows out from the gaseous ammonia outlet 8, steam enters from the steam inlet 6 and is directly sprayed into water through the high-speed ejector 7, the high-speed steam and water are mixed and heated without generating a vibration water hammer phenomenon, the mixed water heats the coil 2, and the coil 2 heats liquid ammonia.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. An ammonia evaporation device for a denitration system is characterized by comprising an evaporation tube (1), a coil (2) and a liquid ammonia tube (20); the coil pipe (2) is arranged in the evaporation pipe (1), the liquid ammonia pipe (20) is arranged in the coil pipe (2), a steam inlet (6) is arranged on the side part of the evaporation pipe (1), a high-speed ejector (7) is arranged in the evaporation pipe (1), and the high-speed ejector (7) is connected with the steam inlet (6); coil pipe (2) are equipped with liquid ammonia import (3), liquid ammonia pipe (20) are equipped with gas ammonia export (8), liquid ammonia pipe (20) are equipped with liquid level switch (18), liquid ammonia pipe (20) are equipped with liquid nitrogen discharge port (12), evaporating pipe (1) tip is equipped with blind flange (5).

2. The ammonia evaporation device for a denitration system according to claim 1, wherein a floating ball (4) is provided in said liquid ammonia pipe (20).

3. The ammonia evaporation device for a denitration system according to claim 1, wherein a water level gauge (11) and a service drain port (15) are further provided at a side portion of the evaporation pipe (1).

4. The ammonia vaporizing device for denitration system of claim 1, wherein said liquid ammonia pipe (20) is provided with a thermometer (16), a pressure gauge (10) and a safety valve (19) in sequence.

5. The ammonia evaporation device for the denitration system according to claim 1, wherein an overflow port (14) is provided at a top end of a side portion of the evaporation tube (1).

6. The ammonia evaporation device for denitration system according to claim 1, wherein a pressure gauge (10) is further provided at the liquid ammonia inlet (3).

7. The ammonia evaporation device for a denitration system according to claim 1, wherein a thermometer (16) and a gasifier (9) are provided on the top of the evaporation tube (1).

8. The ammonia evaporation device for a denitration system according to claim 1, wherein the bottom of the evaporation tube (1) is provided with a leg (13).