CN213726328U

CN213726328U - A urea solution heating device for urea hydrolysis system ammonia

Info

Publication number: CN213726328U
Application number: CN202022546557.9U
Authority: CN
Inventors: 孙轶敏
Original assignee: Datang Environment Industry Group Co Ltd
Current assignee: Datang Environment Industry Group Co Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-07-20
Anticipated expiration: 2030-11-06

Abstract

The utility model provides a urea solution heating device for urea hydrolysis system ammonia, including urea dissolving tank, the outer periphery of urea dissolving tank has female pipe of steam, evenly communicate on the female pipe of steam has a plurality of steam branch pipes, steam branch pipe passes the lateral wall of urea dissolving tank extends to in the urea dissolving tank. The utility model discloses a heating device is simple, convenient and practical, directly lets in the urea solution jar through the pipeline with saturated steam through specific arrangement mode, utilizes steam self heat and steam to let in the fast heating cold water that the vortex that aquatic produced comes, and the vortex makes the heating more even fast, more effectual promotion the dissolving of urea.

Description

A urea solution heating device for urea hydrolysis system ammonia

Technical Field

The utility model relates to a urea dissolving tank field specifically is a urea solution heating device that is used for urea hydrolysis system ammonia.

Background

In many power plants, the urea hydrolysis ammonia preparation process is considered to replace the original liquid ammonia preparation process, and the urea hydrolysis process is used for preparing ammonia gas, and urea is required to be dissolved into a urea solution through hot water. Most of the existing urea dissolving methods mainly comprise the steps of heating cold water by steam through a tank heat exchange coil, adding urea particles into the water after the water temperature reaches above 50 ℃ to dissolve the urea particles into a urea solution, and directly introducing the steam into the tank heat exchange coil, wherein the heat exchange mode is static heat exchange, the heat exchange efficiency is poor, the heating is slow, dead zones are easily generated, the temperature of the urea solution in local areas is low, urea crystallization is caused, and the normal operation of a system is influenced; meanwhile, the existence of the heat exchange coil can influence the arrangement of a manhole door outside the tank, and the normal overhaul of the tank is hindered.

In view of the above, the present invention is particularly proposed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a urea solution heating device for urea hydrolysis system ammonia to solve present direct heat exchange coil who lets in the case jar with steam, heat exchange efficiency is poor, and the heating is slow, produces the blind spot easily, causes local area urea solution temperature to hang down on the low side, leads to the problem of urea crystallization.

In order to solve the technical problem, the invention provides a urea solution heating device for preparing ammonia gas by urea hydrolysis, which comprises a urea dissolving tank, wherein a steam main pipe is surrounded on the periphery of the urea dissolving tank, a plurality of steam branch pipes are uniformly communicated on the steam main pipe, and the steam branch pipes penetrate through the side wall of the urea dissolving tank and extend into the urea dissolving tank.

Further, the steam branch pipe is of an L-shaped structure.

Further, the number of the steam branch pipes is 4.

Further, the steam branch pipe is positioned at one fifth of the height of the urea dissolving tank.

Furthermore, the steam main pipe and the steam branch pipe are located on the same horizontal plane.

Further, a temperature sensor is also arranged on the urea dissolving tank.

Further, the temperature sensor is a wireless temperature sensor.

Furthermore, the steam main pipe and the steam branch pipe are wrapped with anti-corrosion layers.

Furthermore, the steam main pipe and the steam branch pipe are both made of stainless steel materials.

Further, the saturated steam pressure in the steam main pipe is 1.0 MPa.

Compared with the prior art, the invention has the beneficial effects that:

the utility model provides a urea solution heating device for urea hydrolysis system ammonia directly lets in the urea dissolving tank through the pipeline with saturated steam through specific arrangement mode, utilizes steam self heat and steam to let in the vortex that aquatic produced and come quick heating cold water, and the vortex makes the heating more quick even, more effectual promotion the dissolving of urea.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a top view of a urea solution heating device for preparing ammonia gas by urea hydrolysis according to the present invention;

fig. 2 is a schematic structural diagram of a urea solution heating device for preparing ammonia gas by urea hydrolysis according to the present invention.

Description of reference numerals:

1-urea dissolving tank; 2-a steam main pipe;

3-a steam branch pipe; 4-temperature sensor.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be 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 in specific cases to those skilled in the art.

Referring to fig. 1-2 and showing, for the utility model provides a urea solution heating device for urea hydrolysis system ammonia, including urea dissolving tank 1, the outer periphery of urea dissolving tank 1 has female pipe of steam 2, and the last even intercommunication of female pipe of steam 2 has a plurality of steam branch pipes 3, and steam branch pipe 3 passes the lateral wall that urea dissolving tank 1 and extends to in urea dissolving tank 1. Through letting in the female pipe 2 of steam with saturated steam, in the female pipe 2 reentrant steam branch pipe 3 of steam, utilize steam self heat and the steam of steam branch pipe 3 to let in the vortex that aquatic produced and come quick heating cold water, the vortex makes the heating more quick even, more effectual promotion the dissolving of urea.

In this embodiment, steam branch pipe 3 is L type structure, and steam branch pipe 3 sets up quantity and is 4, and 4 steam branch pipes 3 can satisfy urea solution's dissolution temperature basically. The steam main pipe 2 and the steam branch pipes 3 are both positioned on the same horizontal plane, and in order to improve the steam heating uniformity, the steam branch pipes 3 are arranged at the position of one fifth of the height of the urea dissolving tank 1. The user can also adjust the installation positions of the steam branch pipe 3 and the steam main pipe 2 according to the actual use condition on site.

Further, still be provided with temperature sensor 4 on the urea dissolving tank 1 for implement monitoring tank internal temperature, temperature sensor 4 selects wireless temperature sensor, compares other sensors, and wireless temperature sensor has advantages such as need not the wiring, simple to operate and low energy consumption. Further, in order to secure an optimum temperature for urea dissolution, the saturated vapor pressure in the vapor header 2 is set to 1.0 Mpa.

On the basis of the scheme, the steam main pipe 2 and the steam branch pipe 3 are both made of stainless steel materials. The steam main pipe 2 and the steam branch pipe 3 are wrapped with anti-corrosion layers to prevent steam from corroding the pipeline to a certain degree.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a urea solution heating device for urea hydrolysis system ammonia, its characterized in that, includes urea dissolving tank, the outer periphery of urea dissolving tank has the female pipe of steam around, evenly communicate on the female pipe of steam has a plurality of steam branch pipes, steam branch pipe passes the lateral wall of urea dissolving tank extends to in the urea dissolving tank.

2. The urea solution heating apparatus according to claim 1, wherein the steam branch pipe has an L-shaped configuration.

3. The urea solution heating apparatus according to claim 1, wherein the number of the steam branch pipes is 4.

4. The urea solution heating apparatus according to claim 1, wherein the steam main pipe and the steam branch pipe are located at the same level.

5. The urea solution heating apparatus according to claim 4, wherein the steam branch pipe is located at a fifth height of the urea dissolving tank.

6. The urea solution heating apparatus according to claim 1, wherein a temperature sensor is further provided on the urea dissolving tank.

7. The urea solution heating apparatus according to claim 6, wherein the temperature sensor is a wireless temperature sensor.

8. The urea solution heating apparatus according to claim 1, wherein the steam main pipe and the steam branch pipe are each coated with an anticorrosive layer.

9. The urea solution heating apparatus according to claim 1, wherein the steam main pipe and the steam branch pipe are made of stainless steel.

10. The urea solution heating apparatus according to claim 1, wherein a saturated vapor pressure in the vapor header pipe is 1.0 Mpa.