CN207395534U - A kind of ammoxidation heat regenerator - Google Patents
A kind of ammoxidation heat regenerator Download PDFInfo
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- CN207395534U CN207395534U CN201721213254.7U CN201721213254U CN207395534U CN 207395534 U CN207395534 U CN 207395534U CN 201721213254 U CN201721213254 U CN 201721213254U CN 207395534 U CN207395534 U CN 207395534U
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- tubulation
- big pipe
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Abstract
A kind of ammoxidation heat regenerator, including cylinder, cooling wall pipe and tubular heat exchanger are equipped in it, tubular heat exchanger includes the upper tube box set gradually from top to bottom, upper perforated plate, lower perforated plate and lower tube box, upper perforated plate, the big pipe of tubulation and center is equipped between lower perforated plate, and the big pipe of tubulation and center stretches out, lower perforated plate, the big pipe in center is located at the centre of several tubulations, lower tube box is equipped with inlet exhaust gas and offgas outlet, the part that the big pipe in center stretches out upper perforated plate is equipped with expansion joint, on, baffle plate is equipped in cylinder between lower perforated plate, nitrogen oxide entrance is located at the top of cylinder, nitrogen oxide outlet is located on the cylinder above lower perforated plate, there is the space that nitrogen oxide flows between upper tube box and the upper perforated plate and cylinder, lower perforated plate seals the cylinder.The utility model is simple in structure, compact to design, and heat exchange efficiency is high, reduces reaction heat waste, using effect is good, effectively improves exhaust temperature.
Description
Technical field
The utility model belongs to nitric acid preparing technical field, more particularly, to a kind of ammoxidation heat regenerator.
Background technology
At present, China's nitric acid production no matter which kind of production technology, all with a large amount of tail gas generate, this tail gas is cannot
Directly discharge, it is necessary to recycled or handled, and the key equipment steam turbine in process units, it is necessary to steam can
To be substituted with tail gas, but tail gas must improve temperature and could effectively be used to 550 degree or more under a certain pressure, this just needs to borrow
The reaction heat of ammoxidation is helped, exhaust temperature is improved, while reduces the outlet temperature of amino-oxide.Therefore a kind of solution how is provided
Certainly the ammoxidation heat regenerator of the above problem becomes urgent problem to be solved in the prior art.
Utility model content
In view of this, the utility model, which is intended to offer one kind first, has simple in structure, compact to design, heat exchange efficiency height,
Reaction heat waste is reduced, using effect is good, the ammoxidation heat recoverer for nitric acid production for the features such as effectively improving exhaust temperature.Secondly
A kind of convenient heat regenerator of maintenance is provided.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of ammoxidation heat regenerator including cylinder, is equipped with cooling wall pipe and tubular heat exchanger, the row in the cylinder
Heat exchange of heat pipe includes the upper tube box, upper perforated plate, lower perforated plate and the lower tube box that set gradually from top to bottom, the upper perforated plate, lower perforated plate
Between be equipped with the big pipe of tubulation and center, and the big pipe of the tubulation and center stretches out upper and lower tube sheet, and the big pipe in center is located at several columns
The centre of pipe, lower tube box is equipped with inlet exhaust gas and offgas outlet, the big pipe in center stretch out the part of upper perforated plate equipped with expansion joint, institute
It states and baffle plate is equipped in the cylinder between upper and lower tube sheet, nitrogen oxide entrance is located at the top of cylinder, and nitrogen oxide outlet is located at lower perforated plate
On the cylinder of top, there is the space that nitrogen oxide flows between the upper tube box and the upper perforated plate and cylinder, the lower perforated plate seals
The cylinder, tail gas enter lower tube box after tubulation into the big pipe in center by inlet exhaust gas, are gone out by the tail gas of the big bottom of the tube in center
Mouth discharge, nitrogen oxide gas enter cylinder by nitrogen oxide entrance, pass slowly through baffle plate stop and tubulation is carried out outside tubulation
It exports and discharges through nitrogen oxide after heating.
The baffle plate includes major diameter baffle plate, arcuate indentation baffle plate and the minor diameter folding set gradually from top to bottom
Flowing plate is arranged in the middle part of heat exchanging pipe.
The cooling wall pipe is arranged at intervals, and gap is sealing structure.
The tubulation, the big pipe in center weld respectively with lower perforated plate, and tubulation is welded with upper perforated plate, and the big pipe in center passes through expansion joint
It is welded with upper perforated plate.
The big pipe in center is welded with expansion joint.
The offgas outlet is be sleeved on center bottom of the tube jacket structured, and the big pipe in center extends to the lower tube box envelope
Head lower section.
The tubular heat exchanger is fixedly connected with the cylinder of reactor by flange.
Compared with the prior art, a kind of ammoxidation heat regenerator described in the utility model has the advantage that：
Due to the adoption of the above technical scheme：
1. the ammoxidation heat regenerator tail gas of the utility model enters bobbin carriage from bottom inlet pipe, into tubulation to upper tube
Case comes out by the big pipe in center to offgas outlet pipe, and reverse heat-exchange, good effect of heat exchange are carried out with amino-oxide；
2. setting baffle plate in heat regenerator, prevent amino-oxide gas from walking short path, influence heat transfer effect.
3. the big pipe in center is connected with expansion joint, the swelling stress of heat exchanger tube is eliminated, improves security.
4. inlet exhaust gas, offgas outlet are arranged in the bobbin carriage of bottom, it is compact-sized rationally, and when can extend cooling
Between, improve cooling effect.
5. setting cooling wall pipe inside cylinder, cooling wall ligament is sealing structure, to protect cylinder and reduce reaction heat
Damage.To sum up, the utility model is simple in structure, compact to design, and heat exchange efficiency is high, reduces reaction heat waste, using effect is good, effectively carries
High exhaust gas temperature.
6. tubular heat exchanger is fixedly connected with the cylinder of reactor by flange, maintenance easy to disassemble.
7. baffle plate includes the major diameter baffle plate, arcuate indentation baffle plate and the minor diameter baffling that set gradually from top to bottom
Plate is arranged in the middle part of heat exchanging pipe.Increase nitrogen oxide gas flow resistance, when extension nitrogen oxide gas stops in heat regenerator
Between, it is ensured that heat transfer effect reaches optimal.
Description of the drawings
The attached drawing for forming the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The schematic description and description of type does not form the improper restriction to the utility model for explaining the utility model.
In attached drawing：
Fig. 1 is the utility model structure diagram；
Fig. 2 is the big pipe connection expansion joint structure schematic diagram in ammoxidation heat regenerator center；
Fig. 3 is ammoxidation heat regenerator cooling wall pipe structure diagram；
Fig. 4 is ammoxidation heat regenerator gas trend and arrangement of baffles schematic diagram；
Reference sign：
1- offgas outlets, 2- inlet exhaust gas, the outlet of 3- nitrogen oxides, 4- cylinders, 5- cooling wall pipes, 6- upper perforated plates, 7- upper tubes
Case, 8 one expansion joints, the big pipe in 9- centers, 10- baffle plates, 11- tubulations, 12- flanges, 13- lower perforated plates, 14- lower tube box, 15- oxygen
Change nitrogen entrance, 10-1- major diameter baffle plates, 10-2- arcuate indentation baffle plates, 10-3- minor diameter baffle plates.
Specific embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instructions such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description rather than instruction
Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For the limitation to the utility model.In addition, term " first ", " second " etc. are only used for description purpose, and it is not intended that instruction
Or imply relative importance or the implicit quantity for indicating indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can express or implicitly include one or more this feature.In the description of the utility model, unless separately
It is described, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally
Connection；Can be mechanical connection or electrical connection；It can be directly connected, can also be indirectly connected by intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the utility model.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figs 1-4, a kind of ammoxidation heat regenerator, including tubular heat exchanger, cooling wall pipe 5 and connecting flange 12,
Tubular heat exchanger is by upper and lower bobbin carriage 7,14, tubulation 11, the big pipe 9 in center, upper and lower, lower perforated plate 6,13, inlet exhaust gas 2, offgas outlet
1st, the compositions such as the big pipe expansion joint 8 in center, baffle plate 10, are fixedly connected, reactor shell 4 has cooling wall with reactor flange 12
Pipe protects, and for the big pipe in center with expansion joint together as offgas outlet passage, it is abundant that baffle plate makes nitrogen oxide gas exchange heat with tail gas,
Cooling wall ligament is sealing structure.
All parts materials are heat-resistance stainless steel.
Recover bottom bobbin carriage sets inlet exhaust gas and offgas outlet, compact-sized reasonable.
The concrete structure of the present embodiment and its use：
1st, ammoxidation heat regenerator is the injection oxidation nitrogen at the nitrogen oxide entrance 15 at the top of cylinder by tubulation by tail gas
Body makes nitrogen oxide gas fully exchange heat with the tail gas in tubulation, takes the effective measures such as baffle plate, makes the oxygen by heat regenerator
Change nitrogen and reach outlet along certain runner, by fully exchanging heat, nitrogen oxide gas outlet temperature reaches design load requirement, it is ensured that
System response heat moves the problem of i.e. gas walks short path after not occurring quickly.Specifically designing scheme is：3 are set in the middle part of tubulation
The different baffle plate of size structure, refers to attached drawing 1 and attached drawing 4.The purpose is to：Nitrogen oxide gas is diverted to by upper tube box end socket
Both ends, among tubulation and major diameter baffle plate 10-1, subsequently into tubulation and arcuate indentation baffle plate 10-2 both ends,
Then by tubulation and minor diameter baffle plate 10-3 one end, then nitrogen oxide is reached by tubulation and exports 3, appropriate increase aoxidizes nitrogen
Body flow resistance extends nitrogen oxide gas residence time in heat regenerator, it is ensured that heat transfer effect reaches optimal.
2nd, expansion joint is set above the big pipe in the center of exhaust gas channel, can effective compensation because pipeline enclosure temperature different band come
Thermal expansion additional stress, refer to attached drawing 1 and attached drawing 2.The purpose is to：Thermal expansion stress is eliminated, equipment stress is reduced, makes equipment
It can safety and steady operation.
3rd, cooling wall ligament implements 0 gap, refers to attached drawing 3.The purpose is to：Make nitrogen oxide gas not in apparatus casing
Wall contacts, and plays the role of thermal insulation protection, reduces the loss of reaction heat.
4th, lower tube box sets inlet exhaust gas and outlet, refers to attached drawing 1, and the big pipe in center is extended to below end socket, this structure
The loss of tail gas heat quantity can be reduced, improves exhaust temperature.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modifications, equivalent replacements and improvements are made should be included in the utility model
Protection domain within.
Claims (7)
1. a kind of ammoxidation heat regenerator, it is characterised in that：Cooling wall pipe is equipped with including cylinder, in the cylinder and tubulation exchanges heat
Device, the tubular heat exchanger include the upper tube box, upper perforated plate, lower perforated plate and the lower tube box that set gradually from top to bottom, the upper tube
The big pipe of tubulation and center is equipped between plate, lower perforated plate, and the big pipe of the tubulation and center stretches out upper and lower tube sheet, the big pipe in center
Positioned at the centre of several tubulations, lower tube box is equipped with inlet exhaust gas and offgas outlet, the part of the big pipe stretching upper perforated plate in center are set
There is an expansion joint, baffle plate is equipped in the cylinder between the upper and lower tube sheet, nitrogen oxide entrance is located at cylinder top, and nitrogen oxide goes out
Mouth is located on the cylinder above lower perforated plate, there is the space that nitrogen oxide flows, institute between the upper tube box and the upper perforated plate and cylinder
It states lower perforated plate and seals the cylinder, tail gas enters lower tube box after tubulation into the big pipe in center by inlet exhaust gas, by the big pipe in center
The offgas outlet discharge of bottom, nitrogen oxide gas enter cylinder by nitrogen oxide entrance, are passed slowly through baffle plate stop outside tubulation
Portion exports through nitrogen oxide after being heated to tubulation and discharges.
2. a kind of ammoxidation heat regenerator according to claim 1, it is characterised in that：The baffle plate is included from top to bottom
Major diameter baffle plate, arcuate indentation baffle plate and the minor diameter baffle plate set gradually is arranged in the middle part of heat exchanging pipe.
3. a kind of ammoxidation heat regenerator according to claim 1, it is characterised in that：The cooling wall pipe is arranged at intervals,
And gap is sealing structure.
4. a kind of ammoxidation heat regenerator according to claim 1, it is characterised in that：The tubulation, the big pipe difference in center
It is welded with lower perforated plate, tubulation is welded with upper perforated plate, and the big pipe in center is welded by expansion joint and upper perforated plate.
5. a kind of ammoxidation heat regenerator according to claim 1, it is characterised in that：The big pipe in center is welded with expansion joint
It connects.
6. a kind of ammoxidation heat regenerator according to claim 1, it is characterised in that：The offgas outlet is to be sleeved on center
Bottom of the tube is jacket structured greatly, and the big pipe in center is extended to below the lower tube box end socket.
7. a kind of ammoxidation heat regenerator according to claim 1, it is characterised in that：The tubular heat exchanger and reactor
The cylinder be fixedly connected by flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721213254.7U CN207395534U (en) | 2017-09-21 | 2017-09-21 | A kind of ammoxidation heat regenerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721213254.7U CN207395534U (en) | 2017-09-21 | 2017-09-21 | A kind of ammoxidation heat regenerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207395534U true CN207395534U (en) | 2018-05-22 |
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ID=62404543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721213254.7U Active CN207395534U (en) | 2017-09-21 | 2017-09-21 | A kind of ammoxidation heat regenerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111667937A (en) * | 2020-04-30 | 2020-09-15 | 中国辐射防护研究院 | Steam reforming fixed bed reactor for treating radioactive waste |
| CN113405376A (en) * | 2021-07-05 | 2021-09-17 | 南京聚拓化工科技有限公司 | Full-counterflow heat recovery device |
-
2017
- 2017-09-21 CN CN201721213254.7U patent/CN207395534U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111667937A (en) * | 2020-04-30 | 2020-09-15 | 中国辐射防护研究院 | Steam reforming fixed bed reactor for treating radioactive waste |
| CN113405376A (en) * | 2021-07-05 | 2021-09-17 | 南京聚拓化工科技有限公司 | Full-counterflow heat recovery device |
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