CN102889828A - Cleaning and overhauling process of cold and heat exchanger - Google Patents
Cleaning and overhauling process of cold and heat exchanger Download PDFInfo
- Publication number
- CN102889828A CN102889828A CN2011102043455A CN201110204345A CN102889828A CN 102889828 A CN102889828 A CN 102889828A CN 2011102043455 A CN2011102043455 A CN 2011102043455A CN 201110204345 A CN201110204345 A CN 201110204345A CN 102889828 A CN102889828 A CN 102889828A
- Authority
- CN
- China
- Prior art keywords
- cleaning
- heat exchanger
- pipe
- overhauling
- cold heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a cleaning and overhauling process of a cold and heat exchanger. The cleaning and overhauling process comprises the following steps of: 1) building a scaffold for overhauling a cold and heat exchanger, precasting blind plates and dismantling a manhole; 2) deadly building tube pass furnace air inlet and outlet by bricks, and providing a skylight at the upper part of a shell pass inlet furnace air pipeline, and respectively inserting the blind plates on shell pass inlet and outlet pipelines; 3) enabling a high-pressure cleaner for alkali liquor to enter inside from a top manhole to clean a tube bundle downwards; 4) blowing stored water by an axial flow fan after cleaning; 5) pressurizing the shell pass air to 0.02MPa, inspecting leakage and marking the leakage; 6) preparing a pipe, wherein the pipe head forms an oblique angle of 45 degrees, dipping the head part into acid-proof mortar, punching the pipe into a leaking tube bundle by a mallet, forming an acid-proof mortar sealing ring and welding an annular gap of the pipe; and 7) pressurizing and testing the shell after overhauling. The cleaning and overhauling process of the cold and heat exchanger has the beneficial effects that the cleaning and overhauling process is good in cleaning effect fast and convenient to detect leakage, and omission is difficultly caused; the repairing maintenance way of a leaking part of the pipe is simple and feasible; the cleaning and overhauling time is shortened, and the production efficiency is improved.
Description
Technical field
The equipment that the invention belongs to cleans and the maintenance field, especially relates to the cleaning and maintenance technique of hot and cold heat exchanger in the gas washing in SA production.
Background technology
In sulphuric acid process, the conversion section hot and cold heat exchanger is restrained often can be condensed acid and sublimed sulfur Corrosion blockage, affects heat exchange, causes low conversion rate and tail gas SO
2Discharging exceeds standard, and causes environmental pollution.The maintenance hot and cold heat exchanger upgrades tube bank during normally utilizing the parking overhaul of whole factory in the prior art, the fastest 1 month of repair time, has greatly lowered production efficiency.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of cleaning and maintenance technique of rapidly and efficiently, cleaning the effective hot and cold heat exchanger of maintenance is provided.
Technical scheme of the present invention is: the cleaning of hot and cold heat exchanger and maintenance technique comprise the steps:
1) puts up the hot and cold heat exchanger maintenance and use scaffold, shift to an earlier date each one of prefabricated thickness 1400mm and 1200mm blind plate, with pipe insulation and up and down manhole dismounting of heat exchanger;
2) at tube side furnace gas import and export pipeline place with brick dead and isolation of system, prevent that conversion catalyst from making moist, open a skylight is used for checking tube bank and clears up sour mud on shell side import furnace gas pipeline top, shell side is imported and exported and is inserted respectively thickness 1400mm and thickness 1200mm blind plate described in the step 1 on the pipeline, prepares to suppress usefulness;
3) preparation contains NaOH 5% cleaning alkali lye, and alkali lye is forced into 30-35MPa with jetting machine, enters from hot and cold heat exchanger top manhole and restrains cleaning downwards;
4) clean and completely to dry up water in the tube bank with axial flow blower from the lower manhole manhole that makes progress;
5) the shell side air is suppressed to 0.02MPa, checks the tube bank leakage and carries out mark;
6) prepare pipe, tube head is processed into 45 degree oblique angles, and the pipe head dips in the acid resistant adhesive mortar that is made into by a certain percentage, with mallet pipe is squeezed into and is leaked in the tube bank, forms the acid resistant adhesive mortar sealing ring at tube head miter angle place, and the annular space of pipe is welded;
7) the complete shell of maintenance is suppressed test.
In the described step 2, during slip spade, make a call to three clips in the pipeline radial position, prevent that pipeline is shifted when slip spade.
To note in step 3 simultaneously) cleaning process in time detect the pH value of water outlet, prevent the diluted acid etching apparatus, around hot and cold heat exchanger, take low bank between fields with lime, prevent from discharging water and pollute greenbelt.
The invention has the beneficial effects as follows: after adopting technique scheme, at first, cleaning performance is good, hunts leak more quick and convenient, is difficult for omitting; Secondly, simple and easy to do, effective to the repairing maintenance mode of pipe leakage place; The 3rd, clean the repair time to shorten to 3-4 days the very big production efficiency that improved.
The specific embodiment
Embodiment 1: the cleaning of hot and cold heat exchanger and maintenance technique comprise the steps:
1) puts up the hot and cold heat exchanger maintenance and use scaffold, shift to an earlier date each one of prefabricated thickness 1400mm and 1200mm blind plate, with pipe insulation and up and down manhole dismounting of heat exchanger;
2) at tube side furnace gas import and export pipeline place with brick dead and isolation of system, prevent that conversion catalyst from making moist, open a skylight is used for checking tube bank and clears up sour mud on shell side import furnace gas pipeline top, shell side is imported and exported and is inserted respectively thickness 1400mm and thickness 1200mm blind plate described in the step 1 on the pipeline, prepares to suppress usefulness;
3) preparation contains NaOH 5% cleaning alkali lye, and alkali lye is forced into 35MPa with jetting machine, enters from hot and cold heat exchanger top manhole and restrains cleaning downwards;
4) clean and completely to dry up water in the tube bank with axial flow blower from the lower manhole manhole that makes progress;
5) the shell side air is suppressed to 0.02MPa, checks the tube bank leakage and carries out mark;
6) prepare pipe, tube head is processed into 45 degree oblique angles, and the pipe head dips in the acid resistant adhesive mortar that is made into by a certain percentage, with mallet pipe is squeezed into and is leaked in the tube bank, forms the acid resistant adhesive mortar sealing ring at tube head miter angle place, and the annular space of pipe is welded;
7) the complete shell of maintenance is suppressed test.
In the described step 2, during slip spade, make a call to three clips in the pipeline radial position, prevent that pipeline is shifted when slip spade.
In step 3) cleaning process in time detect the pH value of water outlet, prevent the diluted acid etching apparatus, around hot and cold heat exchanger, take low bank between fields with lime, prevent from discharging water and pollute greenbelt.
Above one embodiment of the present of invention are had been described in detail, but described content only is preferred embodiment of the present invention, can not be considered to be used to limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., all should still belong within the patent covering scope of the present invention.
Claims (3)
1. the cleaning of hot and cold heat exchanger and maintenance technique is characterized in that: comprise the steps:
1) puts up the hot and cold heat exchanger maintenance and use scaffold, shift to an earlier date each one of prefabricated thickness 1400mm and 1200mm blind plate, with pipe insulation and up and down manhole dismounting of heat exchanger;
2) preparation contains NaOH 5% cleaning alkali lye, and alkali lye is forced into 30-35MPa with jetting machine, enters from hot and cold heat exchanger top manhole and restrains cleaning downwards;
3) at tube side furnace gas import and export pipeline place with brick dead and isolation of system, open a skylight on shell side import furnace gas pipeline top, shell side is imported and exported and is inserted respectively thickness 1400mm and thickness 1200mm blind plate described in the step 1 on the pipeline;
4) clean and completely to dry up water in the tube bank with axial flow blower from the lower manhole manhole that makes progress;
5) the shell side air is suppressed to 0.02MPa, checks the tube bank leakage and carries out mark;
6) prepare pipe, tube head is processed into 45 degree oblique angles, and the pipe head dips in acid resistant adhesive mortar, with mallet pipe is squeezed into and is leaked in the tube bank, forms the acid resistant adhesive mortar sealing ring at tube head miter angle place, and the annular space of pipe is welded;
7) the complete shell of maintenance is suppressed test.
2. the cleaning of the described hot and cold heat exchanger of claim 1 and maintenance technique is characterized in that: described step 2), during slip spade, make a call to three clips in the pipeline radial position, prevent that pipeline is shifted when slip spade.
3. the cleaning of the described hot and cold heat exchanger of claim 1 and maintenance technique is characterized in that: need in time to detect the pH value of water outlet in the cleaning process described step 3), take low bank between fields with lime simultaneously around hot and cold heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102043455A CN102889828A (en) | 2011-07-21 | 2011-07-21 | Cleaning and overhauling process of cold and heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102043455A CN102889828A (en) | 2011-07-21 | 2011-07-21 | Cleaning and overhauling process of cold and heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102889828A true CN102889828A (en) | 2013-01-23 |
Family
ID=47533420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102043455A Pending CN102889828A (en) | 2011-07-21 | 2011-07-21 | Cleaning and overhauling process of cold and heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102889828A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615928A (en) * | 2013-11-11 | 2014-03-05 | 辽宁大唐国际锦州热电有限责任公司 | Shutdown maintenance method for heaters for heating networks |
| CN109764744A (en) * | 2019-02-18 | 2019-05-17 | 福建申远新材料有限公司 | A kind of chemical cleaning technology of sulfuric acid cooler |
| CN113500069A (en) * | 2021-08-16 | 2021-10-15 | 秦皇岛燕大源达机电科技股份有限公司 | Automatic receiving and dispatching device of drying tower body CIP purger |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603795A (en) * | 2009-07-07 | 2009-12-16 | 甘肃中顺石化工程装备有限公司 | A kind of recovery repairing method of heat exchanger of sulphuric acid system |
-
2011
- 2011-07-21 CN CN2011102043455A patent/CN102889828A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603795A (en) * | 2009-07-07 | 2009-12-16 | 甘肃中顺石化工程装备有限公司 | A kind of recovery repairing method of heat exchanger of sulphuric acid system |
Non-Patent Citations (1)
| Title |
|---|
| 张恒昌,刘强: "转化工序冷换热器的清洗与检修", 《硫酸工业》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615928A (en) * | 2013-11-11 | 2014-03-05 | 辽宁大唐国际锦州热电有限责任公司 | Shutdown maintenance method for heaters for heating networks |
| CN109764744A (en) * | 2019-02-18 | 2019-05-17 | 福建申远新材料有限公司 | A kind of chemical cleaning technology of sulfuric acid cooler |
| CN113500069A (en) * | 2021-08-16 | 2021-10-15 | 秦皇岛燕大源达机电科技股份有限公司 | Automatic receiving and dispatching device of drying tower body CIP purger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102889828A (en) | Cleaning and overhauling process of cold and heat exchanger | |
| CN102778169A (en) | Reparation method of converging-diverging pipe heat exchanger | |
| CN101886263B (en) | Blowing corrosion machine and method for corrosion and cleaning | |
| CN204963666U (en) | A online cleaning system for hydrophily jie's fluoroplastics gas gas heater | |
| CN203177715U (en) | Heat exchanger enabling user to easily overhaul and detect leakage | |
| CN203382501U (en) | Spray gun applied to waste-sulfuric-acid-pyrolysis sulfuric acid preparation | |
| CN211522135U (en) | Device for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe | |
| CN206018670U (en) | One kind is used for sectional formula chimney glass reinforced plastic inner cylinder body attachment means | |
| CN204285491U (en) | The first anti-thawing apparatus of cylinder after a kind of single-drum chimney desulfurization | |
| CN202024311U (en) | Boiler dead steam recovery unit | |
| CN212537891U (en) | Carbon steel flue/chimney lining stainless steel plate structure | |
| CN102022720A (en) | Water-supply capacity-expansion deaerator | |
| CN204986957U (en) | Boiler equipment | |
| CN202747312U (en) | Novel low-temperature heat pipe waste heat boiler | |
| CN103983122A (en) | Comprehensive utilization system for waste heat and waste pressure in sulfuric acid production | |
| CN206310577U (en) | Smeltery's low temperature exhaust heat recovery system | |
| CN110776962A (en) | Device and method for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe | |
| CN219223433U (en) | Composite fin-plate heat exchanger | |
| CN209165756U (en) | A kind of multi-functional yellow phosphorus turns boiler arcuately heat-exchanger rig | |
| CN219036684U (en) | Waste acid schizolysis bypass boiler cold shock wind system | |
| CN205156643U (en) | Residual heat from flue gas device after pyrite -based sulphuric acid production removes dust | |
| CN205860057U (en) | A kind of inner wall of stack anticorrosion high-molecular polythene layer | |
| CN204738593U (en) | Different unit flue gases of assembled glass steel stack separately discharge structure | |
| CN207856622U (en) | A kind of attachment device reducing absorption tower air inlet flue gas corrosion | |
| CN109432971A (en) | A kind of drying tower tower body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130123 |