CN210457460U

CN210457460U - Improved liquid ammonia decomposition furnace pipe

Info

Publication number: CN210457460U
Application number: CN201921316589.0U
Authority: CN
Inventors: 熊军; 孙宜华; 刘正斌; 肖红星
Original assignee: Hubei Sanxia New Building Materials Co ltd
Current assignee: Hubei Sanxia New Building Materials Co ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-05-05
Anticipated expiration: 2029-08-14

Abstract

An improved liquid ammonia decomposition furnace pipe comprises a furnace pipe distributed around a gas collection bag and an ammonia collection bag, wherein the gas collection bag is connected with a gas outlet pipe, the ammonia collection bag is connected with an ammonia inlet pipe, a heater is arranged in the furnace pipe, a lining sleeve is arranged between the heater and the furnace pipe, a flow guide partition plate is arranged in the ammonia collection bag, the flow guide partition plate is opposite to a lower opening of the ammonia inlet pipe, and a high-temperature resistant ceramic pipe is arranged on the inner wall of the ammonia inlet pipe; the high-temperature resistant ceramic pipe is additionally arranged on the inner wall of the ammonia inlet pipe, so that the loss of high-temperature ammonia gas entering the ammonia inlet pipe to a pipeline can be effectively avoided, and the service life of the furnace pipe of the ammonia decomposition furnace is prolonged; the flow guide partition plate at the bottom of the ammonia collector can effectively prevent ammonia gas from scouring and directly contacting with the wall of the ammonia collector, and the ammonia gas can enter each furnace pipe along with the flow guide partition plate; the catalyst in the furnace tube is placed in the lining tube, so that the catalyst is convenient to fix and replace better, and is simple and convenient to install and use; the heater in the furnace tube can ensure that the ammonia gas and the catalyst are in the reaction temperature, so that the ammonia gas can fully react with the catalyst, the ammonia decomposition efficiency is improved, and the content of residual ammonia is reduced.

Description

Improved liquid ammonia decomposition furnace pipe

Technical Field

The utility model relates to an ammonia decomposes hydrogen manufacturing field, especially relates to a modified liquid ammonia decomposition furnace courage.

Background

In order to prevent flange-connected asbestos plate gaskets from being burnt at high temperature on an ammonia inlet pipe of an ammonia decomposition furnace hearth produced in the market, a cooling water protective sleeve is additionally arranged below a flange at the ammonia inlet pipe, but the cooling water protective sleeve reduces the temperature of ammonia gas entering the ammonia decomposition furnace and increases the loss of electric energy; ammonia enters an ammonia decomposition furnace, the temperature is raised, when the ammonia concentration is maximum, the ammonia has certain corrosivity to common heat-resistant stainless steel, the wall thickness is thinned after long-time use, the pressure resistance is reduced, accidents are easy to cause, and the furnace is shut down for maintenance and an ammonia inlet pipe is replaced generally within 2 years; the catalysts in the furnace tubes are stacked in disorder, so that the flow resistance of each tube array is different, the liquid ammonia and the catalysts have incomplete action, the consumption of the liquid ammonia is increased, and the production cost is increased; ammonia gas enters the ammonia collecting bag, high-temperature ammonia gas is flushed on the bottom of the ammonia collecting bag, and the bottom of the ammonia collecting bag is easy to crack due to large internal and external temperature difference, so that accidents are caused.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a modified liquid ammonia decomposition furnace courage solves into ammonia pipe temperature and reduces, and the ammonia corrodes the pipe wall, and the catalyst is put and is changed and high temperature ammonia erodees collection ammonia bag bottom problem.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the improved liquid ammonia decomposing furnace pipe comprises a gas collecting bag and a furnace pipe distributed around the gas collecting bag, the gas collecting bag is connected with a gas outlet pipe, the ammonia collecting bag is connected with an ammonia inlet pipe, a heater is arranged in the furnace pipe, a lining sleeve is arranged between the heater and the furnace pipe, a flow guide partition plate is arranged in the ammonia collecting bag, the flow guide partition plate is just opposite to a lower opening of the ammonia inlet pipe, and a high-temperature resistant ceramic pipe is arranged on the inner wall of the ammonia inlet pipe.

In the preferred scheme, an outer liner tube in the liner tube is connected with an inner liner tube through a connecting rib to form a cavity, the outer liner tube abuts against the inner wall of the furnace tube, and the inner liner tube abuts against the outer wall of the heater.

In a preferable scheme, through holes are arranged on the side walls of the outer liner pipe and the inner liner pipe, and the through holes are vertically or parallelly and uniformly arranged on the outer liner pipe and the inner liner pipe.

In a preferable scheme, a catalyst is arranged in the cavity, and the diameter of the catalyst individual is larger than that of the through hole.

In the preferred scheme, a graphite metal winding gasket is arranged at the joint of the ammonia inlet pipe.

The utility model provides an improved liquid ammonia decomposition furnace pipe, high-temperature ammonia gas enters an ammonia inlet pipe, a graphite metal wound gasket is adopted as a connecting flange gasket, the graphite metal wound gasket has the characteristics of high temperature resistance and corrosion resistance, a cooling water protective sleeve can be eliminated, and an ammonia inlet pipe transition heating area is eliminated; the high-temperature resistant ceramic pipe is additionally arranged on the inner wall of the ammonia inlet pipe, so that the loss of high-temperature ammonia gas entering the ammonia inlet pipe to a pipeline can be effectively avoided, and the service life of the furnace pipe of the ammonia decomposition furnace is prolonged; the flow guide partition plate at the bottom of the ammonia collector can effectively prevent ammonia gas from scouring and directly contacting with the wall of the ammonia collector, and the ammonia gas can enter each furnace pipe along with the flow guide partition plate, so that the service life of the furnace pipe of the ammonia decomposition furnace is greatly prolonged; the catalyst in the furnace tube is placed in the lining tube, so that the catalyst is convenient to fix and replace better, and is simple and convenient to install and use; the heater in the furnace tube can ensure that the ammonia gas and the catalyst are in the reaction temperature, so that the ammonia gas can fully react with the catalyst, the ammonia decomposition efficiency is improved, and the content of residual ammonia is reduced.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is a view of the overall structure of the present invention;

fig. 2 is an overall front view of the present invention;

FIG. 3 is an overall top view of the present invention;

fig. 4 is an overall front cross-sectional view of the present invention;

FIG. 5 is a view of the bushing tube structure of the present invention;

FIG. 6 is a top view of the bushing of the present invention;

fig. 7 is a front sectional view of the bushing of the present invention;

in the figure: an ammonia inlet pipe 1; a furnace tube 2; an air outlet pipe 3 is provided with an air collecting bag 4 and an ammonia collecting bag 5; a flow guide clapboard 6; a liner tube 7; an outer liner tube 701; a liner tube 702; a connecting rib 703; a fixed flange 704; a heater 8; a catalyst 9; a high temperature resistant ceramic tube 10; graphite metal is wrapped around the shim 11.

Detailed Description

As shown in fig. 1 to 7, an improved liquid ammonia decomposition furnace liner comprises a furnace tube 2 distributed around a gas collection bag 4 and an ammonia collection bag 5, the gas collection bag 4 is connected with a gas outlet pipe 3, the ammonia collection bag 5 is connected with an ammonia inlet pipe 1, a heater 8 is arranged in the furnace tube 2, a lining pipe 7 is arranged between the heater 8 and the furnace tube 2, a flow guide partition plate 6 is arranged in the ammonia collection bag 5, the flow guide partition plate 6 is right opposite to a lower opening of the ammonia inlet pipe 1, and a high temperature resistant ceramic pipe 10 is arranged on the inner wall of the ammonia inlet pipe 1.

In a preferable scheme, the outer liner pipe 701 in the liner pipe 7 is connected with the inner liner pipe 702 through the connecting ribs 703 to form a cavity, the outer liner pipe 701 abuts against the inner wall of the furnace tube 2, and the inner liner pipe 702 abuts against the outer wall of the heater 8, so that the liner pipe 7 can be conveniently detached and taken out.

In a preferable scheme, through holes are formed in the side walls of the outer liner pipe 701 and the inner liner pipe 702, and the through holes are vertically or parallelly and uniformly arranged on the outer liner pipe 701 and the inner liner pipe 702, so that ammonia gas can enter the liner pipe 7 from the through holes to fully contact with a catalyst for reaction.

In a preferable scheme, a catalyst 9 is arranged in the cavity, and the diameter of the catalyst 9 is larger than that of the through hole, so that the catalyst is a Z204 high-temperature sintered nickel catalyst, and the catalyst is fixed in the bushing 7 and is convenient to detach and replace.

In the preferred scheme, advance ammonia pipe 1 junction and be equipped with graphite metal winding gasket 11, from this structure, graphite metal winding gasket 11 has high temperature resistant corrosion-resistant characteristic, can eliminate the cooling water protective sheath, eliminates the heating zone of advancing ammonia pipe transition.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a modified liquid ammonia decomposition furnace courage, includes furnace tube (2) that distribute all around air collecting bag (4) and ammonia collecting bag (5), and air collecting bag (4) are connected with outlet duct (3), and ammonia collecting bag (5) are connected characterized by with advancing ammonia pipe (1): a heater (8) is arranged in the furnace tube (2), a lining sleeve (7) is arranged between the heater (8) and the furnace tube (2), a flow guide clapboard (6) is arranged in the ammonia collection bag (5), the flow guide clapboard (6) is just opposite to the lower opening of the ammonia inlet tube (1), and a high-temperature resistant ceramic tube (10) is arranged on the inner wall of the ammonia inlet tube (1).

2. The improved liquid ammonia decomposition furnace according to claim 1, wherein: an outer liner pipe (701) in the liner pipe (7) is connected with an inner liner pipe (702) through a connecting rib (703) to form a cavity, the outer liner pipe (701) abuts against the inner wall of the furnace pipe (2), and the inner liner pipe (702) abuts against the outer wall of the heater (8).

3. The improved liquid ammonia decomposition furnace according to claim 2, wherein: the side walls of the outer liner pipe (701) and the inner liner pipe (702) are provided with through holes, and the through holes are vertically or parallelly and uniformly arranged on the outer liner pipe (701) and the inner liner pipe (702).

4. An improved liquid ammonia decomposition furnace according to claim 2 or 3, wherein: the catalyst (9) is arranged in the cavity, and the diameter of the catalyst (9) is larger than that of the through hole.

5. The improved liquid ammonia decomposition furnace according to claim 1, wherein: and a graphite metal winding gasket (11) is arranged at the joint of the ammonia inlet pipe (1).