CN205367990U - Seamless steel pipe production line spent acid processing system - Google Patents
Seamless steel pipe production line spent acid processing system Download PDFInfo
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- CN205367990U CN205367990U CN201620051651.8U CN201620051651U CN205367990U CN 205367990 U CN205367990 U CN 205367990U CN 201620051651 U CN201620051651 U CN 201620051651U CN 205367990 U CN205367990 U CN 205367990U
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Abstract
The utility model discloses a seamless steel pipe production line spent acid processing system, including the grid pond, just heavy pond, the equalizing basin, the complex acid pond, freezing crystallization tower, the recovered acid pond, dense sulphuric acid storage tank, centrifuge, refrigerating units, ferrous sulfate crystal store yard, sludge tihckener and hydroextractor, the inlet in grid pond and the comprehensive spent acid pipeline of seamless steel pipe production line intercommunication, the grid pond, just heavy pond, the equalizing basin, the complex acid pond, freezing crystallization tower, centrifuge and recovered acid pond communicate in proper order, the liquid outlet in recovered acid pond is for producing the retrieval and utilization mouth, the mud discharge port in just heavy pond accesss to sludge tihckener, sludge tihckener's discharge gate accesss to the hydroextractor, sludge tihckener's the supernatant discharge port and the filtrating discharge port of hydroextractor all access to the equalizing basin, dense sulphuric acid storage tank's liquid outlet accesss to the complex acid pond. The utility model discloses stable and the easy operation of operation, the management is convenient, and the treatment effeciency is high, and centrifugal finished product ferrous sulfate crystal purity is high, and the recovered acid fluid power of isolating enough reaches production demand in the factory.
Description
Technical field
This utility model belongs to technical field of sewage, is specifically related to a kind of seamless steel tube production chain spent acid and processes system.
Background technology
Seamless steel pipe enterprise, in producing steel pipe process, can produce the pickle liquor of a kind of sulphuric acid containing about 5% concentration and ferrous sulfate >=270 g/l.
At present, domestic seamless steel pipe enterprise is for producing spent acid, and main employing two ways processes: a kind of is exactly with the material neutralisation treatment spent acid containing alkalescence；Another kind is to take distillation and concentration method to process spent acid.
There are two point defects in the first spent acid processing mode: one is that solid slag is too many, is easily generated secondary pollution；Two is that cost is too high.Another kind of spent acid processing mode there is also two point defects: one is that efficiency is low, and management cost is high；Two is the second-rate of side-product, and purity is not high, is worth low.
Utility model content
The purpose of this utility model is that provides a kind of seamless steel tube production chain spent acid to process system to solve the problems referred to above.
This utility model is achieved through the following technical solutions above-mentioned purpose:
nullA kind of seamless steel tube production chain spent acid processes system，Including grid pond、Preliminary sedimentation tank、Regulating reservoir、Complex acid pond、Freezing and crystallizing tower、Regenerated acid pond、Concentrated sulphuric acid storage tank、Centrifuge、Freezing unit、Ferrous sulfate crystal stockyard、Sludge concentration tank and dewaterer，The inlet in described grid pond connects with the comprehensive spent acid line of seamless steel tube production chain，Described grid pond、Described preliminary sedimentation tank、Described regulating reservoir、Described complex acid pond、Described freezing and crystallizing tower、Described centrifuge and described regenerated acid pond are sequentially communicated，The liquid outlet in described regenerated acid pond is for producing reuse mouth，The mud discharging mouth of described preliminary sedimentation tank leads to described sludge concentration tank，The discharging opening of described sludge concentration tank leads to described dewaterer，The supernatant outlet of described sludge concentration tank and the filtrate outlet of described dewaterer each lead to described regulating reservoir，The liquid outlet of described concentrated sulphuric acid storage tank leads to described complex acid pond.
Further, the pipeline between described complex acid pond and described concentrated sulphuric acid storage tank is provided with the slide valve for control piper break-make.
Further, described complex acid pond is built-in with rabbling mechanism.
Further, the isolated FeSO of described centrifuge4·7H2O is placed in ferrous sulfate crystal stockyard.
Further, the described built-in refrigerating coil of freezing and crystallizing tower and rabbling mechanism.
The beneficial effects of the utility model are in that:
This utility model is stable and simple to operate, convenient management, and treatment effeciency is high, and centrifugal finished product ferrous sulfate crystal purity is high, and isolated regeneration acid solution can reach Production requirement in factory.
Accompanying drawing explanation
Fig. 1 is the structured flowchart that seamless steel tube production chain spent acid described in the utility model processes system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, including grid pond, preliminary sedimentation tank, regulating reservoir, complex acid pond, freezing and crystallizing tower, regenerated acid pond, concentrated sulphuric acid storage tank, centrifuge, freezing unit, ferrous sulfate crystal stockyard, sludge concentration tank and dewaterer, the inlet in grid pond connects with the comprehensive spent acid line of seamless steel tube production chain, grid pond, preliminary sedimentation tank, regulating reservoir, complex acid pond, freezing and crystallizing tower, centrifuge and regenerated acid pond are sequentially communicated, the liquid outlet in regenerated acid pond is for producing reuse mouth, the mud discharging mouth of preliminary sedimentation tank leads to sludge concentration tank, the discharging opening of sludge concentration tank leads to dewaterer, the supernatant outlet of sludge concentration tank and the filtrate outlet of dewaterer each lead to regulating reservoir, the liquid outlet of concentrated sulphuric acid storage tank leads to complex acid pond.
Select as one, it is possible to the pipeline between complex acid pond and concentrated sulphuric acid storage tank is arranged to the slide valve of control piper break-make, it is simple to control the amount of affiliated concentrated sulphuric acid.
In the present embodiment, rabbling mechanism is set in complex acid pond and adds dense H2SO4Carry out complex acid, by H2SO4Concentration is assigned to 16%～20%, then naturally cools to 33 DEG C～36 DEG C.Freezing and crystallizing tower adopts built-in refrigerating coil and rabbling mechanism, is cooled to-3 DEG C～-1 DEG C, temperature-fall period 3～4 hours.FeSO in supernatant in freezing and crystallizing tower4·7H2O density, when≤70g/L, is opened the ball valve of freezing and crystallizing tower bottom, solidliquid mixture is put into centrifuge and carries out solid-liquid separation, isolated FeSO4·7H2O granule is positioned over and is placed in ferrous sulfate crystal stockyard, and packs warehouse-in, isolated regeneration acid solution (FeSO4·7H2O≤100g/L, H2SO4Content 21%～23%).
Work process of the present utility model is as follows:
Pickle liquor from Pickling-shop enters grid pond by comprehensive spent acid line, remove the acid pickle after bulky grain float through grid to precipitate from flowing into preliminary sedimentation tank, regulating reservoir is flowed into after just sinking, it is delivered to complex acid pond with acid-proof pump after the regulating water quality water yield, acid pickle adds concentrated sulphuric acid in complex acid pond and carries out complex acid, by H2SO4Concentration is assigned to 16%～20%, then naturally cools to 33 DEG C～36 DEG C.It is delivered in freezing and crystallizing tower with acid-proof pump after cooling, by fridge group system forced cooling to-3 DEG C～-1 DEG C (whole temperature-fall period 3～4 hours), it is stirred with the speed of 40rpm while cooling, as the supernatant FeSO in freezing and crystallizing tower4·7H2Open crystallizer lower ball valve during O≤70g/L, solidliquid mixture is put into centrifuge and carries out solid-liquid separation, isolated FeSO4·7H2O granule is first positioned over ferrous sulfate crystal stockyard, then packs warehouse-in successively, isolated regeneration acid solution (FeSO4·7H2O≤100g/L、H2SO4Content 21%～23%) certainly flow into the production reuse of regenerated acid pond, Pickling-shop forms a closed loop system with spent acid treating stations, Pickling-shop preferentially uses regenerated acid, nonvoluntary increase eo-acid, only can increase eo-acid when intrasystem acid solution reduces to when can not maintain system operation.
The mud that preliminary sedimentation tank produces enters sludge concentration tank and concentrates, and supernatant is back to regulating reservoir, and after the mud after concentration carries out processed, outward transport is disposed, and pressing filtering liquid is back to regulating reservoir.
Embodiment:
Water quality index: the sulfuric acid waste that seamless steel pipe pickling process produces, main component FeSO4·7H2O≥ 270g/L、H2SO4Content about 5%.
The pickle liquor of Pickling-shop enters grid pond by comprehensive spent acid line, interval of grid strip adopts 5mm, remove the acid pickle after bulky grain float through grid to precipitate from flowing into preliminary sedimentation tank, regulating reservoir is flowed into after stopping 6h, time of staying 24h, being delivered to complex acid pond with acid-proof pump after the regulating water quality water yield, acid pickle adds concentrated sulphuric acid in complex acid pond and carries out complex acid, by H2SO4Concentration is assigned to 18%, then naturally cools to 33 DEG C～36 DEG C.Being delivered in freezing and crystallizing tower with acid-proof pump after cooling, by fridge group system forced cooling to-2 DEG C (whole temperature-fall period 3 hours), while cooling, the speed with 40rpm is stirred, as the supernatant FeSO in freezing and crystallizing tower4·7H2Open crystallizer lower ball valve during O≤70g/L, solidliquid mixture is put into centrifuge and carries out solid-liquid separation, isolated FeSO4·7H2O granule packaging is put in storage, isolated regeneration acid solution (FeSO4·7H2O≤100g/L、H2SO4Content 21%～23%) certainly flow into the production reuse of regenerated acid pond.
The mud that preliminary sedimentation tank produces enters sludge concentration tank and concentrates, and supernatant is back to regulating reservoir, and after the mud after concentration carries out processed, outward transport is disposed, and pressing filtering liquid is back to regulating reservoir.
These are only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included in protection domain of the present utility model.
Claims (5)
- null1. a seamless steel tube production chain spent acid processes system，It is characterized in that: include grid pond、Preliminary sedimentation tank、Regulating reservoir、Complex acid pond、Freezing and crystallizing tower、Regenerated acid pond、Concentrated sulphuric acid storage tank、Centrifuge、Freezing unit、Ferrous sulfate crystal stockyard、Sludge concentration tank and dewaterer，The inlet in described grid pond connects with the comprehensive spent acid line of seamless steel tube production chain，Described grid pond、Described preliminary sedimentation tank、Described regulating reservoir、Described complex acid pond、Described freezing and crystallizing tower、Described centrifuge and described regenerated acid pond are sequentially communicated，The liquid outlet in described regenerated acid pond is for producing reuse mouth，The mud discharging mouth of described preliminary sedimentation tank leads to described sludge concentration tank，The discharging opening of described sludge concentration tank leads to described dewaterer，The supernatant outlet of described sludge concentration tank and the filtrate outlet of described dewaterer each lead to described regulating reservoir，The liquid outlet of described concentrated sulphuric acid storage tank leads to described complex acid pond.
- 2. seamless steel tube production chain spent acid according to claim 1 processes system, it is characterised in that: the pipeline between described complex acid pond and described concentrated sulphuric acid storage tank is provided with the slide valve for control piper break-make.
- 3. seamless steel tube production chain spent acid according to claim 1 processes system, it is characterised in that: described complex acid pond is built-in with rabbling mechanism.
- 4. seamless steel tube production chain spent acid according to claim 1 processes system, it is characterised in that: the isolated FeSO of described centrifuge4·7H2O is placed in ferrous sulfate crystal stockyard.
- 5. seamless steel tube production chain spent acid according to claim 1 processes system, it is characterised in that: the described built-in refrigerating coil of freezing and crystallizing tower and rabbling mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620051651.8U CN205367990U (en) | 2016-01-19 | 2016-01-19 | Seamless steel pipe production line spent acid processing system |
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| CN201620051651.8U CN205367990U (en) | 2016-01-19 | 2016-01-19 | Seamless steel pipe production line spent acid processing system |
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| CN205367990U true CN205367990U (en) | 2016-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107555487A (en) * | 2017-08-01 | 2018-01-09 | 常熟市异型钢管有限公司 | The freezing and crystallizing and recovery process of Waste Sulfuric Acid after acid cleaning of steel tube |
-
2016
- 2016-01-19 CN CN201620051651.8U patent/CN205367990U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107555487A (en) * | 2017-08-01 | 2018-01-09 | 常熟市异型钢管有限公司 | The freezing and crystallizing and recovery process of Waste Sulfuric Acid after acid cleaning of steel tube |
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