CN212334608U

CN212334608U - Urea hydrolysis reactor

Info

Publication number: CN212334608U
Application number: CN202020789149.3U
Authority: CN
Inventors: 刘志新
Original assignee: TIANJIN PLOUGH ENERGY TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: TIANJIN PLOUGH ENERGY TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-01-12
Anticipated expiration: 2030-05-13

Abstract

The utility model provides a urea hydrolysis reactor, including the reactor body, this internal steam coil pipe of installing of reactor, one side of reactor body install be used for to the steam heater of steam coil pipe air feed, the outlet duct that is used for output product gas is installed at the top of reactor body, install electric heating pipe in the outlet duct, liquid feeding pipe is installed to reactor body bottom, it has the preheating cabinet to establish ties on the liquid feeding pipe. A urea hydrolysis reactor, add in the outlet duct and establish electric heating pipe, heat once more product gas, improve product gas output temperature, become superheated gas, the difficult condensation of follow-up transmission & distribution in-process to prevent that the temperature from reducing and generating ammonium carbamate side reaction.

Description

Urea hydrolysis reactor

Technical Field

The utility model belongs to the technical field of urea hydrolysis reaction, especially, relate to a urea hydrolysis reactor.

Background

At present, a common urea hydrolysis reactor on the market adopts a steam heater to directly heat urea solution to promote hydrolysis reaction, product gas generated by hydrolysis directly enters a conveying pipeline, and the product gas is easy to condense and even generates ammonium carbamate side reaction due to the lower temperature of the conveying pipeline. And the condensed water produced by the hydrolysis reactor is directly discharged, thus causing energy waste.

Disclosure of Invention

In view of this, the present invention is directed to a urea hydrolysis reactor, which increases a product gas outlet reheating device, thereby enabling the product gas to be overheated and output, preventing the temperature from decreasing and causing side reactions, and performing secondary utilization on the condensed water of a steam heater, thereby reducing the energy consumption of the reactor.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a urea hydrolysis reactor comprises a reactor body, wherein a steam coil is installed in the reactor body, a steam heater for supplying gas to the steam coil is installed on one side of the reactor body, an air outlet pipe for outputting product gas is installed at the top of the reactor body, an electric heating pipe is installed in the air outlet pipe, a liquid adding pipe is installed at the bottom of the reactor body, and a preheating box is connected to the liquid adding pipe in series;

the preheating device is characterized in that a preheating cavity is formed between the inner walls of the preheating boxes, a liquid distribution box and a mixing box are installed in the preheating cavity, a plurality of preheating pipes are arranged between the liquid distribution box and the mixing box, one ends of the preheating pipes are communicated with the liquid distribution box, the other ends of the preheating pipes are communicated with the mixing box, the liquid feeding pipes are separated into a liquid feeding section and a connecting section by the preheating boxes, the mixing box is communicated with the connecting section, the liquid distribution box is communicated with the liquid feeding section, and the preheating cavity is communicated with a condensate outlet of the steam heater through a pipeline.

Further, the preheating pipe is of a spiral structure.

Further, the preheating pipe is of a serpentine structure.

Furthermore, a plurality of liquid distribution pipes are further installed in the reactor body, and the liquid distribution pipes are respectively connected with the liquid adding pipe through pipelines.

Furthermore, a plurality of liquid distribution holes matched with the steam coil pipe are formed in the liquid distribution pipe.

Furthermore, a liquid level meter is arranged on the side wall of the reactor body.

Further, a safety valve is installed at the top of the reactor body.

Furthermore, a drain pipe is arranged at the bottom of the reactor body.

Compared with the prior art, the urea hydrolysis reactor of the utility model has the following advantages:

(1) a urea hydrolysis reactor, add in the outlet duct and establish electric heating pipe, heat once more product gas, improve product gas output temperature, become superheated gas, the difficult condensation of follow-up transmission & distribution in-process to prevent that the temperature from reducing and generating ammonium carbamate side reaction.

(2) A urea hydrolysis reactor, utilize the steam heater exhaust certain temperature comdenstion water that has to input this internal heating of reactor again after preheating urea solution, the effectual energy consumption that reduces the reactor.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural diagram of a reactor according to an embodiment of the present invention;

FIG. 2 is an enlarged view of part A of a reactor according to an embodiment of the present invention.

Description of reference numerals:

1. a reactor body; 11. an air outlet pipe; 12. a liquid feeding pipe; 121. a liquid adding section; 122. a connecting section; 13. a liquid distribution pipe; 14. a safety valve; 15. a blow-off pipe; 2. a steam coil; 3. a steam heater; 31. a steam inlet; 32. a condensed water outlet; 4. an electric heating tube; 5. a preheating box; 51. a preheating chamber; 52. a liquid distribution box; 53. a mixing box; 54. a preheating pipe; 6. a liquid level meter.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

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 or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and 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 therefore, 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.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1-2, a urea hydrolysis reactor comprises a reactor body 1, a steam coil 2 is installed in the reactor body 1, a steam heater 3 for supplying gas to the steam coil 2 is installed on one side of the reactor body 1, an air outlet pipe 11 for outputting product gas is installed at the top of the reactor body 1, an electric heating pipe 4 is installed in the air outlet pipe 11, a liquid adding pipe 12 is installed at the bottom of the reactor body 1, and a preheating tank 5 is connected in series on the liquid adding pipe 12; add in outlet duct 11 and establish electric heating pipe 4, heat product gas once more, improve product gas output temperature, become superheated gas, difficult condensation in the follow-up transportation and distribution process to prevent that the temperature from reducing and generating ammonium carbamate side reaction. The electric heating tube 4 is a stainless steel electric heating tube of Jinweida electric heating technology, Inc. in salt city.

A preheating cavity 51 is formed between the inner walls of the preheating box 5, a liquid distribution box 52 and a mixing box 53 are installed in the preheating cavity 51, a plurality of preheating pipes 54 are arranged between the liquid distribution box 52 and the mixing box 53, one end of each preheating pipe 54 is communicated with the liquid distribution box 52, the other end of each preheating pipe 54 is communicated with the mixing box 53, the liquid adding pipe 12 is divided into a liquid adding section 121 and a connecting section 122 by the preheating box 5, the mixing box 53 is communicated with the connecting section 122, the liquid distribution box 52 is communicated with the liquid adding section 121, and the preheating cavity 51 is communicated with the condensate water outlet 32 of the steam heater 3 through a pipeline. The steam heater 3 is provided with a steam inlet 31 and a condensed water outlet 32, and the condensed water with a certain temperature generated by the steam heater 3 is preheated and then input into the reactor body 1 for heating, so that the energy consumption of the reactor is effectively reduced. The liquid distribution box 52 and the mixing box 53 are both of a sealed box structure, and are connected through a plurality of preheating pipes 54, so that the contact area of the urea solution and the condensed water with a certain temperature is increased, and the preheating efficiency is improved. The preheating chamber is also provided with a drain pipe for discharging water in the preheating chamber 51.

Preferably, the preheat tube 54 is of a helical configuration. The contact area of the preheating pipe 54 and the condensate water is increased, and the preheating efficiency is improved.

The preheat tube 54 may also be provided in a serpentine configuration.

A plurality of liquid distribution pipes 13 are also arranged in the reactor body 1, and the liquid distribution pipes 13 are respectively connected with the liquid adding pipe 12 through pipelines. Because the temperature of the newly added urea solution is lower, the liquid distribution pipes 13 are arranged along the circumferential direction of the steam coil 2, so that the urea solution added into the reactor body 1 can be uniformly distributed in the reactor body 1, the heating time is further shortened, the reaction efficiency is improved, and the energy consumption is saved.

The liquid distribution pipe 13 is provided with a plurality of liquid distribution holes matched with the steam coil pipe 2. The liquid distribution holes are all arranged towards the steam coil 2, so that the lower urea solution at the newly added temperature can quickly absorb the heat conveyed by the steam coil 2, and the hydrolysis reaction efficiency is improved.

A liquid level meter 6 is installed on the side wall of the reactor body 1. The liquid level meter 6 adopts, but is not limited to, Zouta YLS 16A.

The top of the reactor body 1 is provided with a safety valve 14.

A drain pipe 15 is installed at the bottom of the reactor body 1.

The steam heater 3 is a gas heater of Suzhou pocky mechanical Equipment, Inc., but is not limited thereto.

When the device is used, the urea solution is input into the preheating box 5 from the liquid adding section 121 of the liquid adding pipe 12, directly enters the liquid distribution box 52, enters the mixing box 53 after passing through the preheating pipe 54, the preheating pipe 54 is submerged in condensed water with a certain temperature to preheat the urea solution passing through the preheating pipe 54, the preheated urea solution enters the connecting section 122 of the liquid adding pipe 12 from the mixing box 53, is further conveyed into the liquid distribution pipe 13, is finally discharged from the liquid distribution hole, is mixed with the high-temperature urea solution in the reactor body 1, is heated by the steam coil 2, and is subjected to hydrolysis reaction.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A urea hydrolysis reactor, characterized by: the reactor comprises a reactor body, wherein a steam coil is arranged in the reactor body, a steam heater for supplying gas to the steam coil is arranged on one side of the reactor body, an air outlet pipe for outputting product gas is arranged at the top of the reactor body, an electric heating pipe is arranged in the air outlet pipe, a liquid adding pipe is arranged at the bottom of the reactor body, and a preheating box is connected on the liquid adding pipe in series;

2. The urea hydrolysis reactor as set forth in claim 1, wherein: the preheating pipe is of a spiral structure.

3. The urea hydrolysis reactor as set forth in claim 1, wherein: the preheating pipe is of a snake-shaped structure.

4. A urea hydrolysis reactor as claimed in any one of claims 1 to 3, characterized in that: the reactor body is also internally provided with a plurality of liquid distribution pipes which are respectively connected with the liquid adding pipe through pipelines.

5. The urea hydrolysis reactor according to claim 4, wherein: the liquid distribution pipes are provided with a plurality of liquid distribution holes matched with the steam coil pipes.

6. The urea hydrolysis reactor as set forth in claim 1, wherein: and a liquid level meter is arranged on the side wall of the reactor body.

7. The urea hydrolysis reactor as set forth in claim 1, wherein: and a safety valve is arranged at the top of the reactor body.

8. The urea hydrolysis reactor as set forth in claim 1, wherein: and a drain pipe is arranged at the bottom of the reactor body.