CN219036684U - Waste acid schizolysis bypass boiler cold shock wind system - Google Patents
Waste acid schizolysis bypass boiler cold shock wind system Download PDFInfo
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- CN219036684U CN219036684U CN202222808959.0U CN202222808959U CN219036684U CN 219036684 U CN219036684 U CN 219036684U CN 202222808959 U CN202222808959 U CN 202222808959U CN 219036684 U CN219036684 U CN 219036684U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a waste acid pyrolysis bypass boiler cooling and air-blasting system, which comprises a process fan A and a process fan B, wherein the process fan A and the process fan B are connected with an air preheater 3A, the air preheater 3A is connected with a low-temperature section inlet of an air preheater 0B, a pyrolysis furnace is connected with a high-temperature section outlet of the air preheater 0B through a pipeline, one end of the pyrolysis furnace is fixedly connected with a No. 1 waste heat boiler, the No. 1 waste heat boiler comprises a front smoke box, a fire tube boiler and a rear smoke box, a bypass flue is connected between the rear smoke box and the pyrolysis furnace, and partition walls are arranged at the joint of the front smoke box and the pyrolysis furnace and the joint of the rear smoke box and the fire tube boiler. The high-temperature flue gas generated by the cracking furnace is directly conveyed to the rear smoke box, and the cold shock wind generated by the driving fan and the high-temperature flue gas are uniformly mixed for cooling and then enter the high-temperature section of the air preheater 0B, so that the safe operation of the follow-up heat exchange equipment in the design temperature is ensured.
Description
Technical Field
The utility model relates to the technical field of waste acid pyrolysis, in particular to a waste acid pyrolysis bypass boiler cooling air system.
Background
China is a large country for producing and consuming sulfuric acid, and along with the increasing perfection of environmental protection standards, especially after the waste sulfuric acid belongs to hazardous chemicals, the cracking recovery and recycling of the waste sulfuric acid become the main stream direction for disposing the waste sulfuric acid. At present, the waste acid cracking device is mainly used as an environment-friendly device, and the annual waste acid treatment capacity is generally 1-4 ten thousand tons. However, most of the existing waste acid cracking devices have insufficient waste heat recovery points, the generated steam is usually conveyed to a low-pressure steam pipe network after temperature and pressure reduction, and is utilized as heating steam for production or life, and the utilization rate of the waste heat is low.
In the existing waste acid cracking device, the temperature of the process flue gas of a cracking furnace is up to 1100 ℃, waste heat recovery is completed by an air preheater, a superheater and a waste heat boiler, the waste heat boiler at the cracking furnace reduces the temperature of the flue gas from 1100 ℃ to 816 ℃, and other heat exchange devices further reduce the temperature of the flue gas to 315 ℃, so that the waste heat boiler at the cracking furnace bears a large amount of heat exchange load, and when in a spraying stage, the outlet temperature of the waste heat boiler at the cracking furnace is abnormal, steam overflows from the waste heat boiler, and boiler leakage is caused.
Based on the above situation, the utility model provides a waste acid pyrolysis bypass boiler cold shock air system, which can effectively solve the problems.
Disclosure of Invention
The utility model aims to provide a waste acid pyrolysis bypass boiler cooling air system. According to the waste acid pyrolysis bypass boiler cold shock air system provided by the utility model, a bypass flue is arranged between a rear smoke box and a pyrolysis furnace, and partition walls are arranged at the joint of a front smoke box and the pyrolysis furnace and the joint of the rear smoke box and a fire tube boiler; the high-temperature flue gas generated by the cracking furnace is directly conveyed to the rear smoke box of the No. 1 exhaust-heat boiler, and cold shock air generated by the starting fan and the high-temperature flue gas entering the rear smoke box are uniformly mixed for cooling and then enter the high-temperature section of the air preheater 0B, so that the safe operation of the follow-up heat exchange equipment in the design temperature can be ensured.
The utility model is realized by the following technical scheme:
the waste acid pyrolysis bypass boiler cold shock air system comprises a process fan A and a process fan B, wherein air outlets of the process fan A and the process fan B are respectively connected with an inlet of an air preheater 3A through pipelines, an outlet of the air preheater 3A is connected with a low-temperature section inlet of an air preheater 0B through a pipeline, and a low-temperature section outlet of the air preheater 0B is respectively connected with a superheater 0A and a No. 2 waste heat boiler through a pipeline; the outlets of the superheater 0A and the No. 2 waste heat boiler are respectively connected with an air inlet of a driving fan or a purification system through pipelines; a first gate valve is connected to the air inlet of the driving fan; the high-temperature section outlet of the air preheater 0B is connected with a cracking furnace through a pipeline, one end of the cracking furnace is fixedly connected with a No. 1 waste heat boiler, the No. 1 waste heat boiler comprises a front smoke box, a fire tube boiler and a rear smoke box, the front smoke box is connected with the cracking furnace, and the rear smoke box is connected with an air outlet of a starting fan through a pipeline; an adjusting valve and a second gate valve are connected between the rear smoke box and the driving fan; the utility model discloses a fire-resistant boiler, including back smoke box, pyrolysis furnace, back smoke box with be connected with the bypass flue between the pyrolysis furnace, and preceding smoke box with the junction of pyrolysis furnace and back smoke box and firetube boiler all are provided with partition wall, partition wall includes firebrick layer and the insulating brick layer of bonding connection.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, the purification system comprises a primary dynamic wave washing tower connected with the outlets of the superheaters 0A and 2# waste heat boilers, and the outlet of the primary dynamic wave washing tower is sequentially connected with a gas cooling tower, a secondary dynamic wave washing tower, a wet demister, a safety liquid seal tank and a drying tower; the inlet of the primary dynamic wave washing tower is connected with a gate valve III; the pipeline between the primary dynamic wave washing tower and the gas cooling tower is connected with the first stripping tower; and a pipeline between the safe liquid seal groove and the drying tower is connected with the second stripping tower and the air filter.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, a three-way valve is connected between the rear smoke box of the # 1 exhaust-heat boiler and the inlet of the high-temperature section of the air preheater 0B, and the bottom of the three-way valve is connected to a connecting channel between the cracking furnace and the # 1 exhaust-heat boiler through a pipeline.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, an air outlet of the driving fan is connected with an emptying pipe, and the emptying pipe is provided with a gate valve IV; the air inlet of the driving fan is connected with an air input pipe I, and the air input pipe I is provided with a gate valve V.
According to the above technical scheme, as a further preferable technical scheme of the above technical scheme, the rear smoke box of the # 1 exhaust-heat boiler is connected with an air input pipe two, and the air input pipe two is provided with a gate valve six.
Compared with the prior art, the utility model has the following advantages:
according to the waste acid pyrolysis bypass boiler cold shock air system provided by the utility model, a bypass flue is arranged between a rear smoke box and a pyrolysis furnace, and partition walls are arranged at the joint of a front smoke box and the pyrolysis furnace and the joint of the rear smoke box and a fire tube boiler; the high-temperature flue gas generated by the cracking furnace is directly conveyed to the rear smoke box of the No. 1 exhaust-heat boiler, and cold shock air generated by the starting fan and the high-temperature flue gas entering the rear smoke box are uniformly mixed for cooling and then enter the high-temperature section of the air preheater 0B, so that the safe operation of the follow-up heat exchange equipment in the design temperature can be ensured.
Drawings
FIG. 1 is a process flow diagram of the present utility model;
fig. 2 is a schematic diagram of a connection structure of the cracking furnace and the # 1 exhaust-heat boiler.
Fig. 3 is a schematic structural view of the waste heat boiler of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present utility model, preferred embodiments of the present utility model will be described below with reference to specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.
Example 1:
the waste acid cracking bypass boiler cold shock wind system comprises a process fan A1 and a process fan B2, wherein air outlets of the process fan A1 and the process fan B2 are respectively connected with an inlet of an air preheater 3A 3 through pipelines, an outlet of the air preheater 3A 3 is connected with a low-temperature section inlet of an air preheater 0B4 through a pipeline, and an outlet of the low-temperature section of the air preheater 0B4 is respectively connected with a superheater 0A5 and a No. 2 waste heat boiler 6 through a pipeline; the outlets of the superheater 0A5 and the No. 2 waste heat boiler 6 are respectively connected with an air inlet of the starting fan 7 or a purification system through pipelines; a first gate valve 8 is connected to the air inlet of the driving fan 7; the high-temperature section outlet of the air preheater 0B4 is connected with a cracking furnace 9 through a pipeline, one end of the cracking furnace 9 is fixedly connected with a No. 1 waste heat boiler 10, the No. 1 waste heat boiler 10 comprises a front smoke box 101, a fire tube boiler 102 and a rear smoke box 103, the front smoke box 101 is connected with the cracking furnace 9, and the rear smoke box 103 is connected with an air outlet of a starting fan 7 through a pipeline; a regulating valve 11 and a second gate valve 12 are connected between the rear smoke box 103 and the driving fan 7; a bypass flue 104 is connected between the rear smoke box 103 and the cracking furnace 9, partition walls 105 are arranged at the joint of the front smoke box 101 and the cracking furnace 9 and the joint of the rear smoke box 103 and the fire tube boiler 102, and the partition walls 105 comprise a refractory brick layer 1051 and a heat preservation brick layer 1052 which are connected in a bonding mode.
The utility model is characterized in that a bypass flue 104 is arranged between a rear smoke box 103 and the cracking furnace 9, and partition walls 105 are arranged at the joint of a front smoke box 101 and the cracking furnace 9 and the joint of the rear smoke box 103 and a fire tube boiler 102; the high-temperature flue gas generated by the cracking furnace 9 is directly conveyed to the rear smoke box 103 of the No. 1 waste heat boiler 10, and after the cold shock wind generated by the driving fan 7 and the high-temperature flue gas entering the rear smoke box 103 are uniformly mixed for cooling, the high-temperature flue gas enters the high-temperature section of the air preheater 0B4, so that the safe operation of the subsequent heat exchange equipment in the design temperature can be ensured.
Further, in another embodiment, the purification system comprises a primary dynamic wave washing tower 13 connected with the outlet of the superheaters 0A5 and 2# waste heat boiler 6, and a gas cooling tower 14, a secondary dynamic wave washing tower 15, a wet demister 16, a safety liquid seal tank 17 and a drying tower 18 are sequentially connected with the outlet of the primary dynamic wave washing tower 13; the inlet of the primary dynamic wave washing tower 13 is connected with a gate valve III 19; the pipeline between the primary dynamic wave washing tower 13 and the gas cooling tower 14 is connected with a first stripping tower 20; the pipeline between the safety liquid seal groove 17 and the drying tower 18 is connected with a second stripping tower 21 and an air filter 22.
Further, in another embodiment, a three-way valve 23 is connected between the rear smoke box 103 of the # 1 exhaust heat boiler 10 and the inlet of the high temperature section of the air preheater 0B4, and the bottom of the three-way valve 23 is connected to a connecting channel between the cracking furnace 9 and the # 1 exhaust heat boiler 10 through a pipeline.
The three-way valve 23 ensures the heat exchange capacity of the 1# waste heat boiler 10 and the air preheater 0B4 during normal operation of the 1# waste heat boiler 10.
Further, in another embodiment, an air outlet of the driving fan 7 is connected with an emptying pipe 24, and the emptying pipe 24 is provided with a gate valve IV 25; the air inlet of the driving fan 7 is connected with an air input pipe I26, and the air input pipe I26 is provided with a gate valve V27.
Further, in another embodiment, the rear smoke box 103 of the # 1 exhaust heat boiler 10 is connected to the second air input pipe 28, and the second air input pipe 28 is provided with a six gate valve 29.
The working principle of one of the embodiments of the utility model is as follows:
the air from the process fan A1 or the process fan B2 exchanges heat with the high-temperature flue gas from the No. 1 waste heat boiler 10 and then is sent to the cracking furnace 9 for combustion, the high-temperature flue gas after combustion in the cracking furnace 9 and the high-temperature section and the low-temperature section of the No. 1 waste heat boiler 10 are sent to the air preheater 0B4 through pipelines, the heat is sent to the No. 2 waste heat boiler 6 and the superheater 0A5 through pipelines for recycling, the heat is sent to the primary dynamic wave washing tower 13 of the purification system after the temperature is reduced, and as the partition wall 105 is arranged between the rear smoke box 103 and the fire tube boiler 102 of the No. 1 waste heat boiler 10, the second gate valve 12 and the fifth gate valve 27 are opened during normal production, the cracking furnace 9 is in negative pressure to the purification system, cold shock air is supplied through the pipeline of the driving fan 7 and mixed with the high-temperature flue gas entering the rear smoke box 103, so that the flue gas temperature is reduced, and the safe operation of the subsequent heat exchange equipment in the design temperature can be ensured.
Based on the description of the utility model and the drawings, a waste acid cracking bypass boiler cold shock air system of the utility model can be easily manufactured or used by a person skilled in the art, and the positive effects described in the utility model can be produced.
Unless specifically stated otherwise, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the positional relationship indicated is based on the positional relationship indicated in the drawings, and is merely for convenience of describing the present utility model and simplifying the description, and it is not necessary to indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationship in the present utility model are merely for exemplary illustration and should not be construed as limitations of the present patent, and it is possible for those skilled in the art to understand the specific meaning of the above terms in conjunction with the drawings and according to the specific circumstances.
Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" herein are to be construed broadly, e.g., they may be fixed, removable, or integral; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.
Claims (5)
1. A waste acid schizolysis bypass boiler cold shock wind system which characterized in that: the system comprises a process fan A (1) and a process fan B (2), wherein air outlets of the process fan A (1) and the process fan B (2) are respectively connected with an inlet of an air preheater 3A (3) through pipelines, an outlet of the air preheater 3A (3) is connected with a low-temperature section inlet of an air preheater 0B (4) through a pipeline, and a low-temperature section outlet of the air preheater 0B (4) is respectively connected with a superheater 0A (5) and a No. 2 waste heat boiler (6) through a pipeline; the outlets of the superheater 0A (5) and the No. 2 waste heat boiler (6) are respectively connected with an air inlet of a driving fan (7) or a purification system through pipelines; a first gate valve (8) is connected to the air inlet of the driving fan (7); the high-temperature section outlet of the air preheater 0B (4) is connected with a cracking furnace (9) through a pipeline, one end of the cracking furnace (9) is fixedly connected with a No. 1 waste heat boiler (10), the No. 1 waste heat boiler (10) comprises a front smoke box (101), a fire tube boiler (102) and a rear smoke box (103), the front smoke box (101) is connected with the cracking furnace (9), and the rear smoke box (103) is connected with an air outlet of a starting fan (7) through a pipeline; an adjusting valve (11) and a second gate valve (12) are connected between the rear smoke box (103) and the driving fan (7); the utility model discloses a fire-resistant boiler, including splitting furnace (9), back smoke box (103) with be connected with bypass flue (104) between splitting furnace (9), and preceding smoke box (101) with the junction of splitting furnace (9) and the junction of back smoke box (103) and firetube boiler (102) all is provided with partition wall (105), partition wall (105) are including firebrick layer (1051) and insulating brick layer (1052) of bonding connection.
2. The spent acid cracking bypass boiler cooling air system according to claim 1, wherein: the purification system comprises a primary dynamic wave washing tower (13) connected with the outlets of the superheater 0A (5) and the No. 2 waste heat boiler (6), and the outlet of the primary dynamic wave washing tower (13) is sequentially connected with a gas cooling tower (14), a secondary dynamic wave washing tower (15), a wet demister (16), a safety liquid seal tank (17) and a drying tower (18); the inlet of the primary dynamic wave washing tower (13) is connected with a gate valve III (19); the pipeline between the primary dynamic wave washing tower (13) and the gas cooling tower (14) is connected with a first stripping tower (20); the pipeline between the safe liquid seal groove (17) and the drying tower (18) is connected with the stripping tower II (21) and the air filter (22).
3. The spent acid cracking bypass boiler cooling air system according to claim 1, wherein: a three-way valve (23) is connected between a rear smoke box (103) of the No. 1 waste heat boiler (10) and a high-temperature section inlet of the air preheater 0B (4), and the bottom of the three-way valve (23) is connected to a connecting channel between the cracking furnace (9) and the No. 1 waste heat boiler (10) through a pipeline.
4. The spent acid cracking bypass boiler cooling air system according to claim 1, wherein: an air outlet of the starting fan (7) is connected with an emptying pipe (24), and the emptying pipe (24) is provided with a gate valve IV (25); an air inlet of the driving fan (7) is connected with an air input pipe I (26), and the air input pipe I (26) is provided with a gate valve V (27).
5. The spent acid cracking bypass boiler cooling air system according to claim 1, wherein: the rear smoke box (103) of the No. 1 waste heat boiler (10) is connected with an air input pipe II (28), and the air input pipe II (28) is provided with a gate valve VI (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222808959.0U CN219036684U (en) | 2022-10-24 | 2022-10-24 | Waste acid schizolysis bypass boiler cold shock wind system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222808959.0U CN219036684U (en) | 2022-10-24 | 2022-10-24 | Waste acid schizolysis bypass boiler cold shock wind system |
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| Publication Number | Publication Date |
|---|---|
| CN219036684U true CN219036684U (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222808959.0U Active CN219036684U (en) | 2022-10-24 | 2022-10-24 | Waste acid schizolysis bypass boiler cold shock wind system |
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| CN (1) | CN219036684U (en) |
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2022
- 2022-10-24 CN CN202222808959.0U patent/CN219036684U/en active Active
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