CN219200135U - Dual-module plate heat exchanger for sulfur-containing flue gas alkaline cleaning system - Google Patents
Dual-module plate heat exchanger for sulfur-containing flue gas alkaline cleaning system Download PDFInfo
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- CN219200135U CN219200135U CN202223047047.2U CN202223047047U CN219200135U CN 219200135 U CN219200135 U CN 219200135U CN 202223047047 U CN202223047047 U CN 202223047047U CN 219200135 U CN219200135 U CN 219200135U
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
A dual-module plate heat exchanger for a sulfur-containing flue gas alkaline cleaning system comprises a medium inlet and outlet pipe box, an external frame, dual-module plate bundles and a supporting framework; the double-module plate bundle is arranged in the outer frame, the supporting framework is fixedly connected below the outer frame, and the medium inlet and outlet pipe box is arranged on the outer frame; the medium inlet and outlet pipe box comprises an original flue gas inlet pipe box, an original flue gas outlet pipe box, a purified flue gas inlet pipe box and a purified flue gas outlet pipe box; the outer frame comprises a box plate assembly and a side plate assembly; the box plate assembly is arranged front and back, and the upper end and the lower end of the box plate assembly are fixedly connected with the side plate assembly into a whole to form an external frame; the upper end and the lower end of the outer frame are hermetically provided with a raw flue gas inlet pipe box and a raw flue gas outlet pipe box, and flow channels of the process I are formed in the raw flue gas outlet pipe box; the left end and the right end of the frame are provided with a purified flue gas inlet pipe box in a sealing way, and a purified flue gas outlet pipe box forms a flow channel of the process II. The utility model solves the problems of high energy consumption, low efficiency and high maintenance and replacement cost of equipment.
Description
Technical Field
The utility model relates to the technical field of heat exchanger design and manufacture, in particular to a double-module plate type gas-gas heat exchanger for a sulfur-containing flue gas alkaline washing system.
Background
At present, the purification treatment of sulfur-containing tail gas in domestic chemical plants mainly adopts a wet desulfurization technology. In the wet desulfurization reaction process, the reaction temperature is lower than the corresponding dew point temperature of the reaction gas. In order to avoid dew point corrosion, the desulfurized purified flue gas needs to be heated to be discharged. In the reaction process, the high-temperature raw flue gas is required to be cooled, so that the performance of the raw flue gas meets the process requirements and is matched with the equipment structure. The intermediate medium circulating water is adopted to finish the heat exchange process, so that the energy loss is large, the waste heat utilization of the high-temperature raw flue gas is insufficient, and the resource utilization rate is low.
The high corrosion characteristic of the sulfur-containing tail gas of the heat exchange working medium improves the instability of the equipment in the running process, shortens the service life of the equipment and ensures high maintenance and replacement cost of the equipment.
In summary, the existing sulfur-containing tail gas heat exchange equipment has the defects of low energy utilization rate, difficult operation and maintenance, high replacement cost and the like. It is therefore important to find an efficient and economical heat exchanger for sulfur-containing tail gas treatment devices.
Disclosure of Invention
The utility model provides a double-module plate type heat exchanger of a sulfur-containing flue gas alkaline cleaning system, which solves the problems of high equipment energy consumption, low efficiency and high maintenance and replacement cost.
The technical scheme adopted by the utility model is as follows:
a dual-module plate heat exchanger of a sulfur-containing flue gas alkaline washing system comprises a medium inlet and outlet pipe box, an external frame, a dual-module plate bundle and a supporting framework; the double-module plate bundle is arranged in the outer frame, the supporting framework is fixedly connected below the outer frame, and the medium inlet and outlet pipe box is arranged on the outer frame; the medium inlet and outlet pipe box comprises an original flue gas inlet pipe box, an original flue gas outlet pipe box, a purified flue gas inlet pipe box and a purified flue gas outlet pipe box; the outer frame comprises a box plate assembly and a side plate assembly; the box plate assembly is arranged front and back, and the upper end and the lower end of the box plate assembly are fixedly connected with the side plate assembly into a whole to form an external frame; the upper end and the lower end of the outer frame are hermetically provided with a raw flue gas inlet pipe box and a raw flue gas outlet pipe box, and flow channels of the process I are formed in the raw flue gas outlet pipe box; the left end and the right end of the frame are provided with a purified flue gas inlet pipe box in a sealing manner, and a purified flue gas outlet pipe box forms a flow channel of a flow II; the double-module plate bundle is fixedly connected with the side plate assembly through the support assembly at the bottom of the double-module plate bundle so as to be installed in the outer frame.
The dual-module plate bundle comprises a plate bundle module I and a plate bundle module II; the plate bundle module I and the plate bundle module II are formed by corrugated plates; the front and back sides of each plate bundle are provided with a pressing plate, and the pressing plate and the side plates at the upper end and the lower end of the pressing plate fixedly connect the plate bundles into a whole; the plate bundle module I and the plate bundle module II are arranged in parallel, and adjacent edges are connected into a whole through the first reinforcing ribs to form a double-module plate bundle.
The expansion joint is arranged around the upper part of the double-module plate bundle; the lower end of the expansion joint in each side is fixedly connected with the upper side plate, and the upper end is fixedly connected with the side plate assembly.
The lifting lugs are respectively arranged on the front side and the rear side of the upper parts of the plate bundle module I and the plate bundle module II.
The inside of the original flue gas inlet pipe box is provided with a first spraying component, and the inside of the purified flue gas inlet pipe box is provided with a second spraying component.
The supporting framework comprises supporting legs and second reinforcing ribs; the upper parts of the supporting legs are fixedly connected with the outer frame into a whole through second reinforcing ribs.
The utility model solves the problems of high energy consumption, low efficiency and high maintenance and replacement cost of equipment.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic view of a split structure of the present utility model;
FIG. 3 is a schematic view of the cut-away structure of FIG. 2;
FIG. 4 is a schematic view of a dual module plate bundle according to the present utility model;
FIG. 5 is a schematic illustration of an on-line replacement of a dual module plate bundle according to the present utility model;
fig. 6 is a schematic view of the expansion joint installation in the direction a in fig. 2.
Detailed Description
In order to make the technical solution of the present patent better understood by those skilled in the art, the present patent is further described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, 2 and 3, the dual-module plate heat exchanger for the sulfur-containing flue gas alkaline cleaning system comprises a medium inlet and outlet pipe box, an outer frame, dual-module plate bundles and a supporting framework, wherein the dual-module plate bundles are installed in the outer frame, the supporting framework is fixedly connected to the lower part of the outer frame, and the medium inlet and outlet pipe box is installed on the outer frame. The medium inlet and outlet pipe box comprises a raw flue gas inlet pipe box 101, a raw flue gas outlet pipe box 102, a purified flue gas inlet pipe box 103 and a purified flue gas outlet pipe box 104. The outer frame includes a box plate assembly 106 and a side plate assembly 107. The box plate assembly 106 is welded to the side plate assembly 107 at the upper and lower ends thereof in a front-rear arrangement to form an outer frame. The upper end and the lower end of the frame are hermetically provided with a raw flue gas inlet pipe box 101 and a raw flue gas outlet pipe box 102 to form a flow channel of a process I; the left end and the right end of the frame are provided with a purified flue gas inlet pipe box 103 in a sealing way, and a purified flue gas outlet pipe box 104 forms a flow channel of a flow II; the double module plate bundle 105 is welded to the side plate assembly 107 by a support assembly 108 at the bottom thereof to be mounted in the outer frame.
As shown in fig. 4, the dual module plate bundle 105 includes a plate bundle module I105-1 and a plate bundle module II 105-2; the plate bundle module I105-1 and the plate bundle module II 105-2 are formed by corrugated plates. The front and rear end surfaces of each plate bundle are provided with a pressing plate 105-3, and the pressing plates 105-3 weld the plate bundles into a whole through side plates 105-4 at the upper and lower ends thereof; the plate bundle module I105-1 and the plate bundle module II 105-2 are arranged in parallel, and adjacent edges are connected into a whole through the first reinforcing ribs 105-7 to form the double-module plate bundle 105.
As shown in fig. 6, the expansion joint 105-5 is installed around the upper portion of the double module plate bundle 105; the expansion joint 105-5 in each side has its lower end fixedly connected to the upper side plate 105-4 and its upper end welded to the side plate assembly 107. The displacement difference between the dual module plate bundle 105 and the side plate assembly 107 upon thermal expansion is absorbed.
And square steel is welded on the pressing plate 105-3 to improve the strength of the plate bundle module.
Lifting lugs 105-6 are respectively arranged on the front side and the rear side of the upper parts of the plate bundle module I105-1 and the plate bundle module II 105-2, so that the lifting and the replacement of the single plate bundle module are realized.
The first spraying component 101-1 is arranged in the raw flue gas inlet pipe box 101, high-temperature raw flue gas flows into the heat exchanger from the raw flue gas inlet pipe box, vertically and uniformly flows through the plate pipe flow channels of the heat transfer elements in the plate bundle modules from top to bottom, and flows out from the raw flue gas outlet pipe box. After a certain period of operation, a small amount of impurities wrapped by the flue gas are accumulated in the plate pipe flow channel, and the flue gas is purged and cleaned on line through the spray cleaning device.
A second spraying component 103-1 and a liquid discharging component are arranged in the purified flue gas inlet pipe box 103. The low-temperature purified flue gas flows into the heat exchanger from the purified flue gas inlet pipe box, uniformly flows through the inter-plate flow channels of the heat transfer elements in the plate bundle modules from left to right, and flows out from the purified flue gas outlet pipe box. After the device runs for a period of time, a small amount of impurities are wrapped in the flue gas and accumulated in the channels between the plates, and the flue gas is purged and cleaned on line through a spray cleaning device, and cleaning liquid and the like are discharged from the liquid discharge assembly.
The exterior surface of the box plate assembly 106 is provided with reinforcing ribs to increase the strength of the apparatus.
The supporting framework comprises supporting legs 2 and second reinforcing ribs 3; the upper part of the supporting leg 2 and the outer frame are welded into a whole through the second reinforcing ribs 3, so that the equipment is compact in structure, small in occupied space and suitable for energy-saving reconstruction occasions.
In this embodiment, high-temperature raw flue gas enters from the raw flue gas inlet pipe box 101, uniformly flows through the plate bundles I and II from top to bottom, and flows out after being collected in the raw flue gas outlet pipe box 102, so as to form a flow I. The purified flue gas flows in from the purified flue gas inlet pipe box 103, flows through the heat exchange module from left to right, and flows out from the purified flue gas outlet pipe box 104 to form a flow II. The high-temperature raw flue gas and the purified flue gas are subjected to cross flow heat exchange, so that the device is suitable for layout of wet desulfurization devices, the trend of pipelines is reasonable, and the design difficulty of piping is reduced. Meanwhile, the sulfur-containing high-temperature raw flue gas flows from top to bottom, so that the aggregation of acid liquid precipitated in the heat exchange process can be avoided, and the equipment corrosion risk is reduced. After the equipment normally operates for a certain period, the first and second spray assemblies 101-1 and 103-1 can be utilized to realize online purging, dirt and flow channel plugs on heat transfer elements in the double-module plate bundle are cleaned, pressure drop is ensured not to exceed the standard, and long-period stable and reliable operation of the equipment is ensured. Once the equipment fails in the operation process, based on the modular design of the equipment, the original flue gas inlet pipe box 101 is disassembled to divide the plate bundle module I105-1 and the plate bundle module II 105-2 from the upper end after entering the interior of the equipment from a manhole on the original flue gas outlet pipe box and dividing the plate bundle module I105-1 and the plate bundle module II 105-2 from the lower end and connecting the plate bundle module II with an external frame, and then the failed plate bundle module is replaced from the upper part of the equipment.
As shown in FIG. 5, the plate bundle module I105-1 and the plate bundle module II 105-2 are hung from the inside of the equipment, so that the independent replacement of the failed plate bundle module I105-1 or the plate bundle module II 105-2 in the operation process can be realized without dismantling pipelines, and the maintenance cost of the equipment is greatly reduced.
Of course, when the whole double-module plate bundle fails, only the original flue gas inlet pipe box 101 needs to be disassembled and lifted out from the upper end for quick replacement, and the equipment maintenance cost is greatly reduced.
The foregoing is merely a preferred embodiment of the present patent, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model and are intended to be comprehended within the scope of the present patent.
Claims (6)
1. A double-module plate heat exchanger for a sulfur-containing flue gas alkaline washing system is characterized by comprising a medium inlet and outlet pipe box, an external frame, a double-module plate bundle and a supporting framework; the double-module plate bundle (105) is arranged in the outer frame, the supporting framework is fixedly connected below the outer frame, and the medium inlet and outlet pipe box is arranged on the outer frame; the medium inlet and outlet pipe box comprises an original flue gas inlet pipe box (101), an original flue gas outlet pipe box (102), a purified flue gas inlet pipe box (103) and a purified flue gas outlet pipe box (104); the outer frame comprises a box plate assembly (106) and a side plate assembly (107); the box plate assembly (106) is arranged front and back, and the upper end and the lower end of the box plate assembly are fixedly connected with the side plate assembly (107) to form an external frame; the upper end and the lower end of the outer frame are hermetically provided with a raw flue gas inlet pipe box (101) and a raw flue gas outlet pipe box (102) to form a flow channel of a flow I; the left end and the right end of the frame are provided with a purified flue gas inlet pipe box (103) in a sealing way, and a purified flue gas outlet pipe box (104) forms a flow channel of a process II; the double module plate bundle (105) is fixedly connected with the side plate assembly (107) through the support assembly (108) at the bottom of the double module plate bundle so as to be arranged in the outer frame.
2. A dual module plate heat exchanger for a sulfur-containing flue gas caustic wash system according to claim 1, wherein the dual module plate bundle (105) comprises a bundle module I (105-1) and a bundle module II (105-2); the plate bundle module I (105-1) and the plate bundle module II (105-2) are formed by corrugated plates; the front and back of each plate bundle are provided with a pressing plate (105-3), and the pressing plate (105-3) and the side plates (105-4) at the upper end and the lower end of the pressing plate fixedly connect the plate bundles into a whole; the plate bundle module I (105-1) and the plate bundle module II (105-2) are arranged in parallel, and adjacent edges are connected into a whole through the first reinforcing ribs (105-7) to form the double-module plate bundle (105).
3. A dual module plate heat exchanger for a sulfur-containing flue gas caustic wash system according to claim 2, wherein expansion joints (105-5) are mounted around the upper portion of the dual module plate bundle (105); the lower end of the expansion joint (105-5) in each side is fixedly connected with the upper side plate (105-4), and the upper end is fixedly connected with the side plate assembly (107).
4. A dual module plate heat exchanger for a sulfur-containing flue gas caustic wash system according to claim 2, wherein lifting lugs (105-6) are mounted on the front and rear sides of the upper portions of the plate bundle module I (105-1) and the plate bundle module II (105-2), respectively.
5. The dual-module plate heat exchanger for a sulfur-containing flue gas alkaline cleaning system according to claim 1, wherein a first spray assembly (101-1) is arranged in the raw flue gas inlet pipe box (101), and a second spray assembly (103-1) is arranged in the purified flue gas inlet pipe box (103).
6. A dual module plate heat exchanger for a sulfur-containing flue gas caustic wash system according to claim 1, wherein the support frame comprises legs (2) and second strengthening ribs (3); the upper parts of the supporting legs (2) are fixedly connected with the outer frame into a whole through second reinforcing ribs (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022206412931 | 2022-03-23 | ||
| CN202220641293 | 2022-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219200135U true CN219200135U (en) | 2023-06-16 |
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ID=86702082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223047047.2U Active CN219200135U (en) | 2022-03-23 | 2022-11-16 | Dual-module plate heat exchanger for sulfur-containing flue gas alkaline cleaning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219200135U (en) |
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2022
- 2022-11-16 CN CN202223047047.2U patent/CN219200135U/en active Active
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