CN218328164U

CN218328164U - Waste heat utilization equipment of ammonia oxidation furnace incinerator

Info

Publication number: CN218328164U
Application number: CN202222233885.2U
Authority: CN
Inventors: 邵笑; 马营; 庞义旭
Original assignee: Oschatz Energy & Environment Nanjing Co ltd
Current assignee: Oschatz Energy & Environment Nanjing Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-01-17
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses an ammonia oxidation furnace burns burning furnace waste heat utilization equipment, include: an apparatus body including an ammoxidation furnace body; the lower section assembly comprises a lower section shell and a lower section water cooling wall group arranged in the lower section shell; the upper section assembly comprises an upper section shell corresponding to the lower section shell; the upper section shell and the lower section shell are connected through flange bolts. A waste heat utilization equipment is burnt to oxidation furnace of ammonia, in, through upper segment subassembly and the hypomere subassembly that sets up, the ammonia that enters into the oxidation furnace main part takes place oxidation reaction with oxygen or air on the catalyst net, the nitrogen oxide that the reaction produced will be cooled off in the oxidation furnace main part, the steam of retrieving production can directly be regarded as technology steam or export, improve equipment's waste heat recovery efficiency makes things convenient for people to use, has improved waste heat utilization equipment's waste heat utilization ratio.

Description

Waste heat utilization equipment of ammonia oxidation furnace incinerator

Technical Field

The utility model relates to an ammonia oxidation furnace technical field especially relates to an ammonia oxidation furnace burns burning furnace waste heat utilization equipment.

Background

An important step in the nitric acid production process is the catalytic oxidation of ammonia. The key equipment for realizing the catalytic reaction of ammonia and air or oxygen is the ammonia oxidation furnace, so whether the structure of the ammonia oxidation furnace is reasonable or not is related to the production cost and the rated consumption of the whole production process, and is also related to the safety of production and operation and environmental protection. At present, the types and manufacturers of the ammonia oxidation furnaces are not few. The furnace type is mainly like a babcock furnace type and a lamont furnace type. The characteristics of the babcock furnace are as follows: the waste heat boiler is connected with the oxidation furnace to form an integral device; without tube plates, the furnace tube can be freely expanded; the inlet and outlet of all the pipes are arranged below, and the coil pipe of the ammonia oxidation furnace can be taken out from the furnace. The furnace can be contracted, the flow area is reduced, and the heat transfer efficiency is improved. The lamonte furnace tube is divided into three sections, the uppermost layer is a first evaporation section, the middle part is a superheating section, and the lowermost part is a second evaporation section, so that the direct radiation of high-temperature airflow to the superheating section can be avoided, and meanwhile, the first evaporation section absorbs about 24% of heat, so that the aging of materials is delayed.

Since the twenty-first century, with the increasing international environmental awareness, the country has come up with the relevant environmental protection policy. The ammonia oxidation furnace adopts different catalysts and reaction conditions, and the generated products are different, such as NO, NO2, N2O, N and the like. Where N2O is one of the greenhouse gases, it accounts for approximately 5% of the greenhouse effect and is approximately 300 times as severe as CO 2. If necessary, the ammoxidation furnace can also be provided with a professional catalyst for reducing the emission of N2O. The ammonia oxidation furnace is used as a waste heat boiler, a plurality of heating surfaces are arranged in the furnace, the equilibrium constant of the ammonia oxidation reaction in the ammonia oxidation furnace is large, a lot of heat is released, the heating surfaces can well absorb the heat, and steam is generated while cooling nitrogen oxides and can be used as process steam or output. Therefore, the development of the ammonia oxidation furnace equipment has important significance for saving energy, reducing emission and improving the profit level of enterprises.

However, in the process of implementing the technical solution in the embodiment of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:

when the existing waste heat utilization equipment is used, a lot of heat is released, waste is caused by the efficiency of waste heat recovery, and the requirements of people cannot be met.

Therefore, the waste heat utilization equipment of the incinerator of the ammonia oxidation furnace is provided.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the not enough of prior art. The embodiment of the application provides a waste heat utilization equipment of an ammonia oxidation furnace incinerator.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an ammonia oxidation furnace incinerator waste heat utilization equipment, includes:

an apparatus body including an ammoxidation furnace body;

the lower section assembly comprises a lower section shell and a lower section water cooling wall group arranged in the lower section shell;

the upper section assembly comprises an upper section shell corresponding to the lower section shell;

the upper section shell and the lower section shell are connected by adopting flange bolts;

the lower section water wall group comprises a plurality of groups of lower section water wall tubes, a coil assembly used for absorbing reaction and release heat of process gas in the furnace is arranged in the lower section shell, a coil support used for fixing is arranged on the coil assembly, and the coil assembly can comprise an evaporator and a superheater arranged on the upper surface of the evaporator.

Preferably, the superheater is provided with a matched front evaporator, and the structure of the evaporator and the structure of the superheater are both arranged in an equidistant spiral winding manner.

Preferably, the lower section shell is provided with a protection sleeve and a superheater header corresponding to the coil assembly, and the coil assembly is arranged on the inner side of the lower section water cooling wall group.

Preferably, the inlet and outlet connecting pipes of the evaporator and the superheater are both arranged as bent pipes, and pass through the protective sleeve of the lower shell and are connected to the superheater header tank.

Preferably, the lower bottom surface of the lower section of the shell is provided with a flue gas outlet, and the outer wall of the lower section of the shell is provided with a plurality of groups of skirt bases which are respectively arranged at the outer side of the flue gas outlet.

Preferably, the upper section assembly comprises a flue gas inlet which is arranged on the upper section shell in a bending mode, the flue gas inlet is arranged on the top end face of the upper section shell, and the lower section shell and the upper section shell are sealed through ceramic fiber mats.

Preferably, the upper section assembly further comprises a grab type orifice plate, and the grab type orifice plate is arranged above the coil assembly.

Preferably, the upper assembly further comprises a catalyst net arranged above the grab type pore plate, and a connecting piece connected with the upper shell is detachably arranged on the catalyst net.

Compared with the prior art, according to the utility model discloses an ammonia oxidation furnace burns burning furnace waste heat utilization equipment has following beneficial effect:

in the utility model, through the upper segment component and the lower segment component, ammonia entering the main body of the ammonia oxidation furnace is subjected to oxidation reaction with oxygen or air on the catalyst net, nitrogen oxide generated by the reaction is cooled in the main body of the ammonia oxidation furnace, and the recovered steam can be directly used as process steam or output, so that the waste heat recovery efficiency of equipment is improved, the waste heat utilization rate of waste heat utilization equipment is improved, and convenience is brought to people;

in the utility model, the air tightness between the upper shell and the lower shell can be improved by the ceramic fiber pad and the flange bolt;

the utility model discloses in, through the hypomere water wall tube that sets up, can carry out effectual protection to the hypomere casing, make things convenient for people to use.

Drawings

Fig. 1 is an overall configuration diagram according to an embodiment of the present invention.

Description of the main reference numerals:

1. a main body of an ammoxidation furnace; 2. a lower housing; 3. a lower water wall tube; 4. an upper section housing; 5. a flange bolt; 6. an evaporator; 7. a superheater; 8. a superheater header; 9. a skirt; 10. supporting the coil pipe; 11. a flue gas outlet; 12. a flue gas inlet; 13. a grab type orifice plate; 14. a catalyst mesh; 15. a connecting member.

Detailed Description

The following further describes a specific embodiment of the waste heat utilization equipment of the incinerator of the ammonia oxidation furnace with reference to the attached drawings. The utility model relates to a waste heat utilization device of an incinerator of an ammonia oxidation furnace, which is not limited to the description of the following embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Example 1

The embodiment provides a waste heat utilization device of an incinerator of an ammonia oxidation furnace, which comprises the following components: an apparatus main body including an ammoxidation furnace main body 1;

the lower section assembly comprises a lower section shell 2 and a lower section water cooling wall group arranged in the lower section shell 2;

an upper section assembly comprising an upper section housing 4 corresponding to the lower section housing 2;

wherein, the upper shell 4 and the lower shell 2 are connected by a flange bolt 5;

the lower section water wall group comprises a plurality of groups of lower section water wall tubes 3, a coil assembly used for absorbing reaction and release heat of process gas in the furnace is arranged in the lower section shell 2, a coil support 10 used for fixing is arranged on the coil assembly, and the coil assembly can comprise an evaporator 6 and a superheater 7 arranged on the upper surface of the evaporator 6.

The main body 1 of the ammonia oxidation furnace adopts a professional welding technology aiming at the connection of different materials.

The specially designed bolt can ensure that the furnace cover can be opened quickly and the platinum net can be replaced.

The superheater 7 is provided with a matched front evaporator, and the structure of the evaporator 6 and the structure of the superheater 7 are both arranged in an equidistant spiral line type winding manner.

The lower shell 2 is provided with a protective sleeve and a superheater header 8 corresponding to the coil assembly, and the coil assembly is arranged on the inner side of the lower water cooling wall group.

Connecting pipes of an inlet and an outlet of the evaporator 6 and an inlet and an outlet of the superheater 7 are both arranged as bent pipes, penetrate through the protective sleeve of the lower section shell 2 and are connected to a superheater header 8.

The lower bottom surface of the lower section of the shell 2 is provided with a flue gas outlet 11, and the outer wall of the lower section of the shell 2 is provided with a plurality of groups of skirt bases 9 which are respectively arranged at the outer side of the flue gas outlet 11.

The upper section assembly comprises a flue gas inlet 12 which is arranged on the upper section shell 4 and is bent, and the flue gas inlet is arranged on the top end surface of the upper section shell 4, and the lower section shell 2 and the upper section shell 4 are sealed by adopting ceramic fiber mats.

The upper section assembly further comprises a grab type orifice plate 13, and the grab type orifice plate 13 is arranged above the coil assembly.

The upper section assembly further comprises a catalyst net 14 arranged above the grab type pore plate 13, and a connecting piece 15 connected with the upper section shell 4 is detachably arranged on the catalyst net 14.

Ammonia gas enters the upper section shell 4 through the flue gas inlet 12, and is subjected to oxidation reaction with oxygen or air on a catalyst ammonia gas net, the temperature of a gas mixture after the oxidation reaction is about 850-950 ℃, nitrogen oxides generated by the reaction are cooled to 180-450 ℃ in the lower section shell 2, a heating surface is arranged in the middle of the main body 1 of the ammonia oxidation furnace, steam can be generated by cooling the reaction gas, and the steam generated by heat recovery of the main body 1 of the ammonia oxidation furnace can be directly used as process steam or output.

In the utility model, through the upper segment component and the lower segment component, ammonia entering the main body 1 of the ammonia oxidation furnace is oxidized with oxygen or air on the catalyst net, nitrogen oxide generated by the reaction is cooled in the waste heat recovery system, and the recovered steam can be directly used as process steam or output, thereby improving the waste heat recovery efficiency of the equipment and facilitating the use of people;

in the utility model, the air tightness between the upper shell 4 and the lower shell 2 can be improved by the ceramic fiber pad and the flange bolt 5;

the utility model discloses in, through the hypomere water wall tube 3 that sets up, can carry out effectual cooling protection to hypomere casing 2, make things convenient for people to use.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The utility model provides an ammonia oxidation furnace burns burning furnace waste heat utilization equipment which characterized in that includes:

an apparatus main body including an ammoxidation furnace main body (1);

the lower section assembly comprises a lower section shell (2) and a lower section water cooling wall group arranged in the lower section shell (2);

an upper section assembly comprising an upper section housing (4) corresponding to the lower section housing (2);

the upper section shell (4) and the lower section shell (2) are connected by adopting flange bolts (5);

the lower section water wall group comprises a plurality of groups of lower section water wall tubes (3), a coil assembly used for absorbing reaction and heat release of process gas in the furnace is arranged in the lower section shell (2), a coil support (10) used for fixing is arranged on the coil assembly, and the coil assembly can comprise an evaporator (6) and a superheater (7) arranged on the upper surface of the evaporator (6).

2. The waste heat utilization equipment of the incinerator of the ammonia oxidation furnace as claimed in claim 1, characterized in that the superheater (7) is provided with a matched pre-evaporator, and the structure of the evaporator (6) and the structure of the superheater (7) are both arranged in a spiral line type winding with equal space.

3. The waste heat utilization equipment of the incinerator of the ammonia oxidation furnace as claimed in claim 1, characterized in that said lower section casing (2) is provided with a protection sleeve and a superheater header tank (8) corresponding to a coil assembly, said coil assembly being disposed inside the lower section water cooled wall group.

4. The waste heat utilization equipment of the incinerator of the ammonia oxidation furnace according to the claim 3, characterized in that the inlet and outlet connecting pipes of the evaporator (6) and the superheater (7) are both arranged as bent pipes and pass through the protective sleeve of the lower shell (2) and are connected to the superheater header tank (8).

5. The waste heat utilization equipment of the incinerator of the ammonia oxidation furnace according to the claim 1, characterized in that the lower bottom surface of the lower section shell (2) is provided with a flue gas outlet (11), and the outer wall of the lower section shell (2) is provided with a plurality of groups of skirt bases (9) which are respectively arranged at the outer side of the flue gas outlet (11).

6. The waste heat utilization device of the incinerator of the ammonia oxidation furnace according to claim 1, characterized in that the upper section assembly comprises a flue gas inlet (12) bent at the upper section casing (4) and arranged at the top end face of the upper section casing (4), and the lower section casing (2) and the upper section casing (4) are sealed by ceramic fiber mats.

7. The waste heat utilization device of the incinerator of the ammonia oxidation furnace according to claim 1, characterized in that the upper section assembly further comprises a grab bucket type orifice plate (13), and the grab bucket type orifice plate (13) is arranged above the coil assembly.

8. The waste heat utilization device of the incinerator of the ammonia oxidation furnace as claimed in claim 7, characterized in that said upper section assembly further comprises a catalyst net (14) disposed above said grab-type orifice plate (13), said catalyst net (14) being detachably provided with a connecting member (15) connected to said upper section housing (4).