CN202808359U - Conversion preheating device for sulfuric acid production - Google Patents
Conversion preheating device for sulfuric acid production Download PDFInfo
- Publication number
- CN202808359U CN202808359U CN 201220247540 CN201220247540U CN202808359U CN 202808359 U CN202808359 U CN 202808359U CN 201220247540 CN201220247540 CN 201220247540 CN 201220247540 U CN201220247540 U CN 201220247540U CN 202808359 U CN202808359 U CN 202808359U
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- heat
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- process gas
- flue gas
- temperature flue
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Abstract
The utility model discloses a conversion preheating device for sulfuric acid production. The conversion preheating device consists of a process gas inlet (1), a process gas outlet (2), a high-temperature flue gas inlet (3), a high-temperature flue gas outlet (4), a heat pipe internal circulation heat-exchanging working medium (5), a partition plate (6), heat-pipe heat exchanger heat pipes (7) and a heat-pipe heat exchanger pipe shell (8); and the interior of the heat-pipe heat exchanger pipe shell (8) is partitioned into a lower part and an upper part by the partition plate (6), wherein the lower part is a part where the working medium is heated by high-temperature flue gas, and the upper part is a part where process gas is heated by the high-temperature working medium. The conversion preheating device for sulfuric acid production has the effects and advantages that the maintenance of a high-temperature flue gas side is convenient, and the shutdown maintenance is not required; and the operating environment is good, the use is not affected by heat exchanger leakage, and toxic and harmful gases difficultly leak to the outside.
Description
Technical field
The present invention relates to the heating unit field in the phosphorus chemical product production technology, be specifically related to the primary heater unit that advances conversion process gas in the pyrite-based sulfuric acid production production process.
Background technology
In the pyrite-based sulfuric acid production production process, the driving initial stage, because temperature is low in the convertor, process gas directly enters in the convertor and can't react, process gas must be preheating to the temperature (more than 410 degree) that sulfurous gas can react, normally used interchanger is the common tube shell heat exchanger, adopts high-temperature flue gas direct heating process gas, flue-gas temperature is about 980 ℃, and interchanger often is burned.Process gas will be heated to 450 ℃, valve on such high-temperature condition underground pipelines is difficult to cut off fully again gas, sulfurous gas (toxic and harmful) leaks in the interchanger, under the driving state, can't overhaul, if maintenance there is not guarantee to workman's personnel safety yet, parking maintenance or blank off cut off maintenance all wastes the plenty of time, and impact is normally produced, and will cause heavy economic losses.
Carry out from producing normally, the equipment of assurance has the long normal trouble-free service time, and from reducing production costs, improves production economy benefit purpose and set out, and this heat exchange mode is all required to be changed, and substitutes with other advanced heat-exchanger rigs.
Summary of the invention
The objective of the invention is to select suitable interchanger, change hot tube heat exchanger into the common tube shell heat exchanger
Sulfur dioxide gas without the direct preheating toxic and harmful of high-temperature flue gas, interchanger is divided into two sections, one section is with high-temperature flue gas heating working medium (the third medium), another section is to carry out heat exchange with working medium and process gas after the heating, reach the purpose of pre-heating technique gas, do not use or maintenance even if heat exchanger leakage also can not affect.Thereby avoided the injury of high temperature toxic and harmful to the people.
A kind of preheating device in conversion section during sulfuric acid manufacturing of the utility model, the hot tube heat exchanger of pre-thermal recovery are by process gas inlets 1, and process gas exports 2, high-temperature flue gas import 3, high-temperature flue gas outlet 4, heat pipe internal circulation heat-exchanging working medium 5, dividing plate 6, hot tube heat exchanger heat pipe 7, hot tube heat exchanger shell 8 forms; Hot tube heat exchanger shell 8 inner route clapboards 6 are divided into two parts, and hot tube heat exchanger heat pipe 7 passes dividing plate 6 and is distributed in two parts in the hot tube heat exchanger, flow circuit heat-exchange working medium 5 in the heat pipe; Lower part is by high-temperature flue gas import 3, high-temperature flue gas outlet 4, heat pipe internal circulation heat-exchanging working medium 5, the working medium that dividing plate 6 consists of is by the high-temperature flue gas hot spots, upper section is by process gas inlets 1, process gas outlet 2, heat pipe internal circulation heat-exchanging working medium 5, and process gas and the high temperature refrigerant heat exchanging part of dividing plate 6 formations; Heat pipe internal circulation heat-exchanging working medium 5 is walked in the heat pipe, and high-temperature flue gas and process gas are walked outside the heat pipe, and two portions are cut off by dividing plate 6 sealings up and down.
During work, select high boiling liquid medium as working medium in the hot tube heat exchanger, high-temperature flue gas advance between interchanger fume side shell with heat pipe in working medium carry out heat exchange, high temperature refrigerant enters interchanger process gas side by natural circulation and process gas carries out heat exchange, so that process gas temperature raises, reach the intensification purpose, temperature reduces after working medium and the process gas heat exchange, working medium is recycled to again fume side heating, recycle.
Effect of the present invention and advantage, 1, high-temperature flue gas side maintenance is convenient, do not need parking maintenance.
2, good operational environment, workman's personnel safety is secure; 3, heat exchanger leakage does not affect use, and toxic and harmful is difficult for leaking.
Description of drawings
Fig. 1 hot tube heat exchanger structural representation;
In Fig. 1,1. process gas inlets, 2. process gas outlet, 3. high-temperature flue gas import, 4. high-temperature flue gas outlet, 5. heat pipe internal circulation heat-exchanging working medium, 6. dividing plate, 7. hot tube heat exchanger heat pipe, 8. hot tube heat exchanger shell.
Embodiment
Embodiment: the existing process gas primary heater unit of 2 * 400,000 ton/years of pyrite-based sulphuric acid plants of limited liability company of urn good fortune group is rectified and improved, continue to use existing high-temperature flue gas generating unit, change the common tube shell heat exchanger into hot tube heat exchanger, the import and export pipeline same pipe pipeline directly of process gas is coupled together, hot tube heat exchanger one end is reached in the high temp. flue, the other end reaches in the process gas pipeline, and high-temperature flue gas side and process gas side cut off and can realize with dividing plate.The hot tube heat exchanger of pre-thermal recovery is by process gas inlets 1, and process gas exports 2, high-temperature flue gas import 3, and high-temperature flue gas outlet 4, heat pipe internal circulation heat-exchanging working medium 5, dividing plate 6, hot tube heat exchanger heat pipe 7, hot tube heat exchanger shell 8 forms; Hot tube heat exchanger shell 8 inner route clapboards 6 are divided into two parts, and hot tube heat exchanger heat pipe 7 passes dividing plate 6 and is distributed in two parts in the hot tube heat exchanger, flow circuit heat-exchange working medium 5 in the heat pipe; Lower part is by high-temperature flue gas import 3, high-temperature flue gas outlet 4, heat pipe internal circulation heat-exchanging working medium 5, the working medium that dividing plate 6 forms is by the high-temperature flue gas hot spots, upper section is by process gas inlets 1, process gas outlet 2, heat pipe internal circulation heat-exchanging working medium 5, and process gas and the high temperature refrigerant heat exchanging part of dividing plate 6 compositions; Heat pipe internal circulation heat-exchanging working medium 5 is walked in the heat pipe, and high-temperature flue gas and process gas are walked outside the heat pipe, and two portions are cut off by dividing plate 6 sealings up and down.
Claims (1)
1. preheating device in conversion section during sulfuric acid manufacturing, it is characterized in that the hot tube heat exchanger of pre-thermal recovery is by process gas inlets (1), process gas outlet (2), high-temperature flue gas import (3), high-temperature flue gas outlet (4), heat pipe internal circulation heat-exchanging working medium (5), dividing plate (6), hot tube heat exchanger heat pipe (7), hot tube heat exchanger shell (8) forms; Hot tube heat exchanger shell (8) inner route clapboard (6) is divided into two parts, and hot tube heat exchanger heat pipe (7) passes dividing plate (6) and is distributed in two interior parts of hot tube heat exchanger, heat pipe internal circulation heat-exchanging working medium (5); Lower part is by high-temperature flue gas import (3), high-temperature flue gas outlet (4), heat pipe internal circulation heat-exchanging working medium (5), the working medium that dividing plate (6) consists of is by the high-temperature flue gas hot spots, upper section is by process gas inlets (1), process gas outlet (2), heat pipe internal circulation heat-exchanging working medium (5), and process gas and the high temperature refrigerant heat exchanging part of dividing plate (6) formation; Heat pipe internal circulation heat-exchanging working medium (5) is walked in the heat pipe, and high-temperature flue gas and process gas are walked outside the heat pipe, and two portions are cut off by dividing plate (6) sealing up and down; By interchanger being divided into two sections or two portions, during work, select high boiling liquid medium as working medium in the hot tube heat exchanger, high-temperature flue gas advance between the shell of interchanger bottom high-temperature flue gas section with heat pipe in working medium carry out heat exchange, high temperature refrigerant carries out heat exchange by upper section and the process gas that natural circulation rising in the heat pipe enters the interchanger process gas, so that process gas temperature raises, reach the intensification purpose, in the heat pipe working medium and process gas by heat exchange after the temperature reduction, working medium drops to bottom high-temperature flue gas heating, recycle by circulating again in the heat pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220247540 CN202808359U (en) | 2012-05-30 | 2012-05-30 | Conversion preheating device for sulfuric acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220247540 CN202808359U (en) | 2012-05-30 | 2012-05-30 | Conversion preheating device for sulfuric acid production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202808359U true CN202808359U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220247540 Expired - Fee Related CN202808359U (en) | 2012-05-30 | 2012-05-30 | Conversion preheating device for sulfuric acid production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202808359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701161A (en) * | 2012-05-30 | 2012-10-03 | 瓮福（集团）有限责任公司 | Conversion preheating device in sulfuric acid production |
-
2012
- 2012-05-30 CN CN 201220247540 patent/CN202808359U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701161A (en) * | 2012-05-30 | 2012-10-03 | 瓮福（集团）有限责任公司 | Conversion preheating device in sulfuric acid production |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20170530 |