CN212328249U

CN212328249U - Urea hydrolysis reactor

Info

Publication number: CN212328249U
Application number: CN202020789159.7U
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, the outer wall of coaxial tubulation outer tube and the inner wall of reactor body form the reaction chamber, the inner wall of coaxial tubulation outer tube and the outer wall of coaxial tubulation inner tube and the inner wall of reactor body form the condensate water chamber, the inner wall of coaxial tubulation inner tube and the inner wall of reactor body form the steam chamber, the top of reactor body is installed and is used for exporting the outlet duct of product gas, install electric heating pipe in the outlet duct; the liquid distribution box is installed at the bottom of the reaction cavity, a liquid distribution cavity is formed between the inner walls of the liquid distribution box, one end of the liquid adding pipe is communicated with the liquid distribution cavity, and a plurality of liquid distribution holes are formed in the top of the liquid distribution box. Urea hydrolysis reactor, add in the outlet duct and establish electric heating pipe, carry out reheating to product gas, the difficult condensation of follow-up transmission and 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 hydrolyzation, especially, relate to a urea hydrolysis reactor.

Background

The product gas generated by the existing urea hydrolysis reactor directly enters a conveying pipeline for transportation and distribution, and the product gas is easy to condense due to the lower temperature of the conveying pipeline, and even generates ammonium carbamate side reaction. And the reactors are directly added with urea solution through a liquid feeding pipe, so that the local temperature of the urea solution is low, the rapid temperature rise is not facilitated, and the hydrolysis reaction efficiency is reduced.

Disclosure of Invention

In view of this, the utility model aims at providing a urea hydrolysis reactor to reheat the product gas and form superheated gas output, with the urea solution evenly distributed that newly adds simultaneously, promote its intensification.

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 coaxial tubes are installed in the reactor body and comprise a coaxial tube array outer tube and a coaxial tube array inner tube, the coaxial tube array outer tube is of a one-end-opening-end-closed structure, the coaxial tube array inner tube is of a two-end-opening structure, the coaxial tube array outer tube is sleeved outside one end of the coaxial tube array inner tube, the bottom end of the coaxial tube array outer tube and the bottom end of the coaxial tube array inner tube are respectively connected with the reactor body, the outer wall of the coaxial tube array outer tube and the inner wall of the reactor body form a reaction cavity, the inner wall of the coaxial tube array outer tube, the outer wall of the coaxial tube array inner tube and the inner wall of the reactor body form a condensed water cavity, the inner wall of the coaxial tube array inner tube and the inner wall of the reactor body form a steam cavity, a liquid feeding tube is installed on the side wall of the reaction cavity, and a water pipe is installed on the side wall of, the side wall of the steam cavity is provided with a steam pipe, the top of the reactor body is provided with an air outlet pipe for outputting product gas, and the air outlet pipe is internally provided with an electric heating pipe;

the bottom of reaction chamber installs the cloth liquid box, the cloth liquid box is hollow ring circular structure, the cloth liquid box cover is in the outside of coaxial tubulation outer tube, form the cloth liquid chamber between the inner wall of cloth liquid box, the one end of liquid feeding pipe with the cloth liquid chamber is linked together, a plurality of cloth liquid holes have been seted up at the top of cloth liquid box, the cloth liquid chamber passes through with the reaction chamber the cloth liquid hole is linked together.

Further, a gas-liquid separation net is arranged in the reaction cavity and is positioned above the coaxial tube nest outer tube.

Furthermore, a plurality of heat exchange fins are arranged on the outer side of the outer tube of the coaxial tube array.

Furthermore, heat exchange grooves are formed in the heat exchange fins and communicated with the condensed water cavity.

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

Furthermore, a liquid level meter is arranged on the side wall of the reaction cavity.

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

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

(2) Urea hydrolysis reactor, add at the tip of liquid feeding pipe and establish the cloth liquid box, make the low temperature urea solution equipartition of newly adding in the reactor through the cloth liquid box, avoid the part to pile up intensification slower, and then improve hydrolysis reaction efficiency.

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 a schematic cross-sectional view of a coaxial tube array according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a liquid distribution box according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a liquid distribution box according to an embodiment of the present invention.

Description of reference numerals:

1. a reactor body; 11. a reaction chamber; 111. a liquid feeding pipe; 112. a liquid distribution box; 1121. a liquid distribution cavity; 1122. liquid distribution holes; 113. a gas-liquid separation net; 12. a condensed water cavity; 121. a condensate pipe; 13. a steam chamber; 131. a steam pipe; 14. an air outlet pipe; 141. an electric heating tube; 15. a drain pipe; 16. a liquid level meter; 2. a coaxial tubulation outer tube; 21. heat exchange fins; 211. a heat exchange tank; 3. coaxial tubulation inner tube.

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 figures 1-4, a urea hydrolysis reactor comprises a reactor body 1, wherein a coaxial tube array is installed in the reactor body 1, the coaxial tube array comprises a coaxial tube array outer tube 2 and a coaxial tube array inner tube 3, the coaxial tube array outer tube 2 is of a structure with one open end and one closed end, the coaxial tube array inner tube 3 is of a structure with two open ends, the coaxial tube array outer tube 2 is sleeved outside one end of the coaxial tube array inner tube 3, the bottom end of the coaxial tube array outer tube 2 and the bottom end of the coaxial tube array inner tube 3 are respectively connected with the reactor body 1, the outer wall of the coaxial tube array outer tube 2 and the inner wall of the reactor body 1 form a reaction cavity 11, the inner wall of the coaxial tube array outer tube 2 and the outer wall of the coaxial tube array inner tube 3 and the inner wall of the reactor body 1 form a condensed water cavity 12, the inner wall of the coaxial tube array inner tube 3 and the inner wall of the reactor body 1 form a steam cavity 13, and the, a condensate pipe 121 is installed on the side wall of the condensate water cavity 12, a steam pipe 131 is installed on the side wall of the steam cavity 13, an outlet pipe 14 for outputting product gas is installed on the top of the reactor body 1, and an electric heating pipe 141 is installed in the outlet pipe 14; an electric heating pipe 141 is additionally arranged in the gas outlet pipe 14 to reheat the product gas, so that the output temperature of the product gas is increased, the product gas becomes overheated gas, condensation is not easy to occur in the subsequent transportation and distribution process, and the side reaction of ammonium carbamate generated by temperature reduction is prevented.

The electric heating tube 141 is a stainless steel electric heating tube of Jinweida electric heating technology, ltd.

The bottom of the reaction chamber 11 is provided with a liquid distribution box 112, the liquid distribution box 112 is of a hollow circular ring structure, the liquid distribution box 112 is sleeved outside the coaxial tubulation outer tube 2, a liquid distribution chamber 1121 is formed between the inner walls of the liquid distribution box 112, one end of the liquid feeding tube 111 is communicated with the liquid distribution chamber 1121, the top of the liquid distribution box 112 is provided with a plurality of liquid distribution holes 1122, and the liquid distribution chamber 1121 is communicated with the reaction chamber 11 through the liquid distribution holes 1122. The liquid distribution box 112 is additionally arranged at the end part of the liquid feeding pipe 111, and the newly added low-temperature urea solution is uniformly distributed in the reactor through the liquid distribution box 112, so that the phenomenon that the temperature is slowly increased due to local accumulation is avoided, and the hydrolysis reaction efficiency is further improved.

The reaction chamber 11 is internally provided with a gas-liquid separation net 113, and the gas-liquid separation net 113 is positioned above the coaxial shell and tube outer tube 2. The moisture or liquid carried in the product gas is removed through the gas-liquid separation net 113, and the purity of the product gas is improved.

The outer side of the coaxial tube array outer tube 2 is provided with a plurality of heat exchange fins 21. The heat exchange fins 21 increase the contact area between the urea solution and the high-temperature steam, the heating effect is better, and the hydrolysis reaction is more efficient.

The heat exchange grooves 211 are formed in the heat exchange fins 21, and the heat exchange grooves 211 are communicated with the condensed water cavity 12. The high-temperature steam is distributed in the heat exchange tank 211, and the contact area of the steam and the urea solution is further increased.

The bottom of the reactor body 1 is provided with a drain pipe 15.

A liquid level meter 16 is installed on the side wall of the reaction chamber 11. The liquid level meter 16 is, but not limited to, Zouta YLS 16A.

When the device is used specifically, high-temperature steam enters the steam cavity 13 through the steam pipe 131, then rises along the coaxial tube nest inner pipe 3, enters and is filled with the heat exchange groove 211 and the condensed water cavity 12, the urea solution in the reaction cavity 11 is heated, the hydrolysis reaction of the urea solution is promoted, then the steam is liquefied to form condensed water, the condensed water flows back to the bottom of the condensed water cavity 12, and the condensed water is discharged out of the reactor through the condensed water pipe 121. The reactor still is equipped with the controller, the controller adopts PLC, level gauge 16 links to each other with the controller, detect the urea solution liquid level height in the reactor through level gauge 16, when the level surface is less than the alarm value, level gauge 16 gives the controller with signal transfer, the valve on controller control liquid feeding pipe 111 is opened, add urea solution through liquid feeding pipe 111, because the urea solution temperature of newly adding is lower, urea solution advances into liquid distribution box 112, through the outside of liquid distribution box 112 evenly distributed at coaxial shell and tube outer tube 2, avoid low temperature solution to pile up, lead to rising temperature slower phenomenon to appear, improve hydrolysis reaction efficiency.

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 coaxial tube array is installed in the reactor body and comprises a coaxial tube array outer tube and a coaxial tube array inner tube, the coaxial tube array outer tube is of an open-end-closed structure, the coaxial tube array inner tube is of an open-end structure, the coaxial tube array outer tube is sleeved outside one end of the coaxial tube array inner tube, the bottom end of the coaxial tube array outer tube and the bottom end of the coaxial tube array inner tube are respectively connected with the reactor body, the outer wall of the coaxial tube array outer tube and the inner wall of the reactor body form a reaction cavity, the inner wall of the coaxial tube array outer tube and the outer wall of the coaxial tube array inner tube and the inner wall of the reactor body form a condensed water cavity, the inner wall of the coaxial tube array inner tube and the inner wall of the reactor body form a steam cavity, a liquid adding tube is installed on the side wall of the reaction cavity, and a condensed water tube is installed on the side, the side wall of the steam cavity is provided with a steam pipe, the top of the reactor body is provided with an air outlet pipe for outputting product gas, and the air outlet pipe is internally provided with an electric heating pipe;

2. The urea hydrolysis reactor as set forth in claim 1, wherein: and a gas-liquid separation net is arranged in the reaction cavity and is positioned above the coaxial tube nest outer tube.

3. The urea hydrolysis reactor as set forth in claim 1, wherein: and a plurality of heat exchange fins are arranged on the outer side of the coaxial tube array outer tube.

4. A urea hydrolysis reactor as claimed in claim 3, characterized in that: and heat exchange grooves are formed in the heat exchange fins and communicated with the condensed water cavity.

5. The urea hydrolysis reactor as set forth in claim 1, wherein: the bottom of the reactor body is provided with a drain pipe.

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 reaction cavity.