CN205528526U - Hierarchical recycle system of rare formaldehyde in paraformaldehyde production - Google Patents
Hierarchical recycle system of rare formaldehyde in paraformaldehyde production Download PDFInfo
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- CN205528526U CN205528526U CN201620265143.XU CN201620265143U CN205528526U CN 205528526 U CN205528526 U CN 205528526U CN 201620265143 U CN201620265143 U CN 201620265143U CN 205528526 U CN205528526 U CN 205528526U
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Abstract
The utility model relates to a chemical production technical field, concretely relates to hierarchical recycle system of rare formaldehyde in paraformaldehyde production. The system is connected with the evaporimeter for the formalin basin passes through the pipeline, the evaporimeter passes through the pipeline and is connected with stills, stills passes through the pipeline and is connected with the desicator, the desicator passes through the pipeline and is connected with the absorption tower, the absorption tower is passed through the pipeline and is connected with the precipitation tank, the export of the turbid liquid of precipitation tank is connected with evaporimeter and urotropine workshop respectively through the pipeline, the precipitation tank purified liquor outlet passes through the pipeline and is connected with the formaldehyde production workshop. Deposit filtering separation with the mixed solution that absorption tower the inside includes rare formaldehyde and dust through the precipitation tank, supernatant returns the formaldehyde workshop and acts on behalf of soft water recycle, the lower floor beats toward urotropine workshop production urotropine turbid night, or paraformaldehyde gathers the continuation production paraformaldehyde of concentrated workshop section. Adopt the utility model discloses increase formaldehyde output, reduced the economic loss in urotropine workshop.
Description
Technical field
This utility model relates to chemical production technical field, is specifically related to the classification recycling system of dilute formaldehyde during a kind of paraformaldehyde produces.
Background technology
In paraformaldehyde production process, enter the concentration of formaldehyde of scraper-type exsiccator about 47%, be concentrated into 70% entrance concentration kettle by scraper dryer, evaporate containing formaldehyde exhaust-gas by plate cold solidifying after deliver to formaldehyde workshop and reclaim；Rake type dryer is entered by vacuum to 2.5m, improve concentration >=96% and obtain finished product, evaporate and enter absorption tower containing formaldehyde exhaust-gas by condenser, waste water contains dilute formaldehyde and the paraformaldehyde powder of about 26%, it it is cloudy state, cannot reuse, conventional treatment is to deliver to hexamethylenamine Workshop Production hexamethylenamine.
In the production process of formaldehyde, concentration of formaldehyde regulates formalin extraction concentration by increase and decrease soft water addition, formaldehyde is not added with during soft water concentration typically at 58%-60%, concentration is higher, easily cause stifled tower, plugging phenomenon, and be not suitable for manufacturing technique requirent, it is therefore desirable to add soft water, make the concentration of formaldehyde be adjusted to 48%-50%.
And production technology of paraformaldehyde, it is simply that evaporate unnecessary moisture by steam heater means, improve the content of paraformaldehyde, and substantial amounts of dilute formaldehyde that technique produces, it is simply that we are in the urgent need to the intermediate products processed；In the production of present stage, dilute formaldehyde produced by scraper dryer concentration formaldehyde may be used for Formaldehyde Production (replacement soft water), but the dust produced in dry run due to rake type dryer is also blended in dilute formaldehyde produced by rake type dryer, cause dilute formaldehyde muddy, cannot be used for formaldehyde to reclaim, so hexamethylenamine Workshop Production hexamethylenamine can only be delivered to, but owing to present stage hexamethylenamine profit is negative, dilute formaldehyde produced by rake type dryer has only been not suitable for present stage enterprise development requirement as hexamethylenamine raw materials for production, in the urgent need to separately seeking technological means to process dilute formaldehyde produced by rake type dryer.
Summary of the invention
The purpose of this utility model is to there are provided the classification recycling system of dilute formaldehyde during a kind of paraformaldehyde produces, and carries out dilute formaldehyde recycling, and the supernatant is beaten and replaced toward formaldehyde workshop soft water to recycle, and the turbid liquid of lower floor is beaten toward hexamethylenamine Workshop Production crow torr.
Technical solutions of the utility model are as follows:
The classification recycling system of dilute formaldehyde in the production of a kind of paraformaldehyde, formalin basin is connected with vaporizer by pipeline, described vaporizer is connected with distillating still by pipeline, described distillating still is connected with exsiccator by pipeline, described exsiccator is connected with absorption tower by pipeline, described absorption tower is connected with stillpot by pipeline
The outlet of described stillpot turbid liquid is connected with the formaldehyde medial launder in vaporizer and hexamethylenamine workshop respectively by pipeline,
Described stillpot purified liquor outlet is connected with the demineralized water tank in Formaldehyde Production workshop by pipeline.
Described stillpot is connected by pipeline and the second condenser, and described second condenser and the second circulating water pool connect,
Described absorption tower is connected with described second condenser by pipeline, and described second condenser is connected with washing filling by pipeline.
Described vaporizer and distillating still are connected by pipeline and the first condenser respectively, and described first condenser is connected by pipeline and the first circulating water pool.
Described exsiccator is connected with packing shop by pipeline,
Described exsiccator is rake type dryer.
Described stillpot be material be the device that rustless steel is made, be shaped as vertical tank body.
Described system is used to carry out the method that the classification of dilute formaldehyde in paraformaldehyde production recycles, it is characterised in that described method is:
By stillpot, the mixed solution including dilute formaldehyde and dust inside absorption tower being carried out precipitation and filter separation, the supernatant is returned formaldehyde workshop and is acted on behalf of soft water recycling；Lower floor beats toward hexamethylenamine Workshop Production hexamethylenamine turbid night, or the poly-concentration section of paraformaldehyde continues to produce paraformaldehyde.
This utility model provides the classification recycling system of dilute formaldehyde in the production of a kind of paraformaldehyde, has the advantage that
1, Formaldehyde Production workshop can completely dispense with addition soft water, adds formaldehyde yield；Because being previously required to add soft water dilution formaldehyde, after improving, eliminate soft water to add, change by adding the dilute formaldehyde of recovery, decrease dozen dilute formaldehyde amount in past hexamethylenamine workshop and namely decrease the yield of hexamethylenamine, the most covert yield (because reclaiming the formaldehyde that dilute formaldehyde contains about 13%) adding formaldehyde；
2, reduce the yield owing to producing hexamethylenamine, reduce present price section and produce the loss that hexamethylenamine brings, before transformation, rake dry produced dilute formaldehyde every day is at about 22T, can only all beat toward hexamethylenamine Workshop Production hexamethylenamine (hereinafter referred to as crow torr), crow torr yield is probably at 15T/ day (25% content), by present stage crow torr loss per ton at 168 yuan/ton, the annual product time calculated by 330 days, loss 330*15*168=831600 is first, and after transformation, beat bottom turbid liquid 7 ton day toward hexamethylenamine, the crow torr produced is at about 5 tons, loss 330*5*168=277200 is first；And play the supernatant toward formaldehyde workshop in about 15 tons/sky, being converted into 37% formaldehyde is 5.27 tons, and present stage formaldehyde profit per ton is at 52 yuan, and annual benefit is in 330*5.27*52=90433.2 unit.
Before not transforming, loss, at 831600 yuan, after transformation is: 277200-90433.2=186766.8 unit.
Accompanying drawing explanation
Fig. 1 is the classification recycling system structural representation of dilute formaldehyde during this utility model paraformaldehyde produces；
Wherein: formalin basin 1, vaporizer 2, distillating still 3, exsiccator 4, packing shop 5, the first circulating water pool 6, first condenser 7, absorption tower 8, stillpot 9, the demineralized water tank 10 in Formaldehyde Production workshop, second condenser 11, second circulating water pool 12, washes filling 13, the formaldehyde medial launder 14 in hexamethylenamine workshop.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described further:
Embodiment
1
As shown in Figure 1, the classification recycling system of dilute formaldehyde in the production of a kind of paraformaldehyde, formalin basin 1 is connected with vaporizer 2 by pipeline, described vaporizer 2 is connected with distillating still 3 by pipeline, described distillating still 3 is connected with exsiccator 4 by pipeline, described exsiccator 4 is connected with absorption tower 8 by pipeline, and described absorption tower (8) are connected with stillpot 9 by pipeline
The outlet of described stillpot 9 turbid liquid is connected with the formaldehyde medial launder 14 in vaporizer 2 and hexamethylenamine workshop respectively by pipeline,
Described stillpot 9 purified liquor outlet is connected with the demineralized water tank 10 in Formaldehyde Production workshop by pipeline.
Described stillpot 9 is connected by pipeline and the second condenser 11, and described second condenser 11 is connected with the second circulating water pool 12,
Described absorption tower 8 is connected with described second condenser 11 by pipeline, and described second condenser 11 fills 13 by pipeline with washing and is connected.
Described vaporizer 2 and distillating still 3 are connected by pipeline and the first condenser 7 respectively, and described first condenser (7) is connected by pipeline and the first circulating water pool 6.
Described exsiccator 4 is connected with packing shop 5 by pipeline,
Described exsiccator 4 is rake type dryer.
Described stillpot 9 is the device that rustless steel is made for material, is shaped as vertical tank body.
Embodiment
2
Using described system to carry out the method that the classification of dilute formaldehyde in paraformaldehyde production recycles, described method is:
By stillpot, the mixed solution including dilute formaldehyde and dust inside absorption tower being carried out precipitation and filter separation, the supernatant is returned formaldehyde workshop and is acted on behalf of soft water recycling；Lower floor beats toward hexamethylenamine Workshop Production hexamethylenamine turbid night, or the poly-concentration section of paraformaldehyde continues to produce paraformaldehyde.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as the restriction for the present invention, and the embodiment in the application and the feature in embodiment, can mutual combination in any in the case of not conflicting.The technical scheme that protection scope of the present invention should be recorded with claim, is protection domain including the equivalents of technical characteristic in the technical scheme that claim is recorded.Equivalent the most in this range is improved, also within protection scope of the present invention.
Claims (7)
1. the classification recycling system of dilute formaldehyde during a paraformaldehyde produces, it is characterized in that: formalin basin (1) is connected with vaporizer (2) by pipeline, described vaporizer (2) is connected with distillating still (3) by pipeline, described distillating still (3) is connected with exsiccator (4) by pipeline, described exsiccator (4) is connected with absorption tower (8) by pipeline, described absorption tower (8) is connected with stillpot (9) by pipeline
The outlet of described stillpot (9) turbid liquid is connected with the formaldehyde medial launder (14) in vaporizer (2) and hexamethylenamine workshop respectively by pipeline,
Described stillpot (9) purified liquor outlet is connected with the demineralized water tank (10) in Formaldehyde Production workshop by pipeline.
Recycling system the most according to claim 1, it is characterised in that: described stillpot (9) is connected by pipeline and the second condenser (11), and described second condenser (11) is connected with the second circulating water pool (12).
Recycling system the most according to claim 2, it is characterised in that: described absorption tower (8) are connected with described second condenser (11) by pipeline, and described second condenser (11) fills (13) by pipeline with washing and is connected.
Recycling system the most according to claim 1, it is characterised in that: described vaporizer (2) and distillating still (3) are connected by pipeline and the first condenser (7) respectively, and described first condenser (7) is connected by pipeline and the first circulating water pool (6).
Recycling system the most according to claim 1, it is characterised in that: described exsiccator (4) is connected with packing shop (5) by pipeline.
Recycling system the most according to claim 1, it is characterised in that: described exsiccator (4) is rake type dryer.
Recycling system the most according to claim 1, it is characterised in that: described stillpot (9) be material be the device that rustless steel is made, be shaped as vertical tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620265143.XU CN205528526U (en) | 2016-04-01 | 2016-04-01 | Hierarchical recycle system of rare formaldehyde in paraformaldehyde production |
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| CN201620265143.XU CN205528526U (en) | 2016-04-01 | 2016-04-01 | Hierarchical recycle system of rare formaldehyde in paraformaldehyde production |
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| CN205528526U true CN205528526U (en) | 2016-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105693489A (en) * | 2016-04-01 | 2016-06-22 | 宜都市多邦化工有限公司 | Classified recycling system and method of dilute formaldehyde in paraformaldehyde production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105693489A (en) * | 2016-04-01 | 2016-06-22 | 宜都市多邦化工有限公司 | Classified recycling system and method of dilute formaldehyde in paraformaldehyde production |
| CN105693489B (en) * | 2016-04-01 | 2017-09-22 | 宜都市多邦化工有限公司 | The classification recycling system and method for dilute formaldehyde in a kind of paraformaldehyde production |
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Effective date of registration: 20200821 Address after: 443007 no.66-4, Juting Avenue, liaoting District, Yichang City, Hubei Province Patentee after: HUBEI TAISHENG CHEMICAL Co.,Ltd. Address before: 443311, Huaxin Road 8, branch Town, Yichang, Hubei, Yidu Patentee before: YIDU DUOBANG CHEMICAL Co.,Ltd. |