CN216296306U - Polyaluminium chloride preparation facilities - Google Patents

Abstract

The utility model relates to a polyaluminium chloride preparation device. The technical scheme is as follows: the utility model provides a poly aluminium chloride prepares device, is provided with the cover that presss from both sides that encircles the arrangement including glass-lined reation kettle, glass-lined reation kettle's outer wall, presss from both sides the cover and connects steam adjusting component, and glass-lined reation kettle's bottom is provided with the discharge gate, and glass-lined reation kettle's discharge gate is connected the diaphragm pressure filter. The utility model adopts the glass lining reaction kettle, and can be used for high-concentration hydrochloric acid reaction; the temperature and the pressure in the reaction kettle are controlled by introducing steam into the jacket on the outer wall of the reaction kettle, so that the reaction environment in the reaction kettle is ensured to be uniform, the pressure and the temperature of the steam are regulated by the steam regulating component, and the reaction condition is more accurate; reaction residues and impurities in the solution after reaction are removed through a membrane filter press, the obtained solution product does not need to be diluted, the water solubility is good during use, the impurity removal effect is good, and the membrane filter press can be used for other types of filter presses or devices capable of filtering and fixing impurities in liquid.

Description

Polyaluminium chloride preparation facilities

Technical Field

The utility model relates to the technical field of chemical equipment, in particular to a polyaluminium chloride preparation device.

Background

Industrial waste water typically uses polyaluminum chloride (PAC) in combination with polyacrylamide as a flocculant. The polyaluminium chloride can play a role in flocculating and rapidly precipitating suspended substances in sewage in water treatment. Is widely applied to the water treatment fields of printing and dyeing factories, paper mills, leather factories, food processing factories and the like. The process for producing polyaluminium chloride mainly comprises a metallic aluminium method, an aluminium hydroxide method, an aluminium sesquioxide method and a crystalline aluminium chloride method. The flocculation effect of the polyaluminium chloride is better than that of aluminum sulfate, ferrous sulfate and ferric chloride; the floc is formed quickly, the settling speed is high, the reaction time is short, and the production strength of the treatment unit can be improved; the sludge dewatering property is good; the effect is better when the polyacrylamide is matched in a certain proportion; the application range of the method to the PH, temperature, turbidity, alkalinity and the like of the wastewater is wide; the pH of the treated effluent is changed little, the residue of aluminum and salt is little, the cost is low, the dosage is small, and the method is suitable for various industrial wastewater. Most of the aluminum polychloride powder products sold in the market at present have unstable product quality, less ideal flocculation effect and high use cost due to the preparation method, purity and other reasons. And the use needs diluting device fully to dilute the usefulness during the use, it is comparatively troublesome.

Disclosure of Invention

The utility model provides a polyaluminium chloride preparation device for preparing polyaluminium chloride solution from high-concentration hydrochloric acid and aluminium hydroxide powder, aiming at the problems that the quality of the polyaluminium chloride powder on the market is unstable and the polyaluminium chloride powder needs to be fully diluted.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a poly aluminium chloride prepares device, is provided with the cover that presss from both sides that encircles the arrangement including glass-lined reation kettle, glass-lined reation kettle's outer wall, presss from both sides the cover and connects steam adjusting component, and glass-lined reation kettle's bottom is provided with the discharge gate, and glass-lined reation kettle's discharge gate is connected the diaphragm pressure filter. The utility model adopts the glass lining reaction kettle, and can be used for high-concentration hydrochloric acid reaction; the temperature and the pressure in the reaction kettle are controlled by introducing steam into the jacket on the outer wall of the reaction kettle, so that the reaction environment in the reaction kettle is ensured to be uniform, the pressure and the temperature of the steam are regulated by the steam regulating component, and the reaction condition is more accurate; reaction residues and impurities in the solution after reaction are removed through a membrane filter press, the obtained solution product does not need to be diluted, the water solubility is good during use, the impurity removal effect is good, and the membrane filter press can be used for other types of filter presses or devices capable of filtering and fixing impurities in liquid.

Preferably, the glass lining reaction kettle is provided with a feed inlet above, the feed inlet is provided with a tail gas treatment assembly above, and the tail gas treatment assembly is connected with the tail gas treatment assembly. Concentrated hydrochloric acid volatility is stronger, and in the material feeding process, aluminium hydroxide powder also can fly away everywhere, and tail gas treatment component can be used to detach volatile gas and powder, reduce the pollution.

Preferably, the tail gas treatment component comprises a fan, an air inlet of the fan is connected with an air cylinder, the air cylinder is connected with a gas collecting hood, the gas collecting hood is arranged above a feed opening of the glass lining reaction kettle, the tail gas treatment component comprises a tail gas treatment tower, and an air outlet of the fan is connected with the tail gas treatment tower. And conveying the volatilized gas and the drifted powder to a tail gas treatment tower for treatment through a corrosion-resistant fan.

Preferably, the membrane filter press is connected with the tempering tank. And detecting whether the basicity, the alumina content, the pH value and the like of the reaction solution meet the standards.

Preferably, the tempering tank is connected with the finished product tank. And filling the qualified reaction solution into finished product tanks, and dividing the finished product tanks into various packages.

Preferably, the tail gas treatment tower comprises a sprayer and a demister, and the top of the sprayer and the demister is provided with the alkaline solution. The sprayer and the demister are used for dissolving the gas and the powder collected by the fan into liquid and neutralizing acid substances through alkali liquor.

Preferably, the steam conditioning assembly comprises a steam header. The steam cylinder is used for controlling the distribution of steam entering the jacket, so as to control the reaction environment in the reaction kettle.

The utility model has the following beneficial effects: 1. the glass lining reaction kettle is adopted, and can be used for high-concentration acid chemical reaction; 2. the reaction kettle adjusts the internal environment through the steam in the jacket of the outer wall, and the reaction conditions are accurately controlled; 3. the product is a solution, does not need to be diluted, has good water solubility, improves the impurity removal effect, removes impurities from the reaction solution through a membrane filter press, and ensures the purity.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure, 1, a first chemical pump, 2, a tail gas treatment tower, 3, a fan, 4, a hydrochloric acid tank, 5, a second chemical pump, 6, an air duct, 7, a glass lining reaction kettle, 8, a gas collecting hood, 9, a third chemical pump, 10, a membrane filter press, 11, a fourth chemical pump, 12, a steam cylinder, 13, a conditioning tank, 14, a fifth chemical pump, 15, a finished product tank, 16, a sixth chemical pump, 17, a jacket, 18 and a stirring assembly.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a preparation device of polyaluminium chloride comprises a hydrochloric acid tank 4, wherein high-concentration hydrochloric acid is contained in the hydrochloric acid tank 4, a second chemical pump 5 is arranged at a discharge port at the bottom of the high-concentration hydrochloric acid and is connected with a feed inlet at the top of a glass lining reaction kettle 7, the feed inlet of the glass lining reaction kettle 7 is mechanically sealed at high pressure to ensure the stability of internal pressure and reaction environment, a stirring assembly consisting of a stirring shaft and stirring blades is arranged in the glass lining reaction kettle 7, a jacket 17 arranged in a surrounding manner is arranged on the outer wall of the glass lining reaction kettle 7, and the jacket 17 is connected with a steam distributing cylinder 12; the discharge hole at the bottom of the glass lining reaction kettle 7 is connected with a membrane filter press 10 through a third chemical pump 9 and used for removing residues and impurities in the solution after reaction, the membrane filter press 10 is connected with a tempering tank 13 through a fourth chemical pump 11, the tempering tank 13 is connected with a finished product tank 15 through a fifth chemical pump 14, and the bottom outlet of the finished product tank 15 is connected with a sixth chemical pump 16. And a gas collecting hood 8 is further arranged above a feed inlet of the glass lining reaction kettle 7, the gas collecting hood 8 is connected with an air inlet of the corrosion-resistant fan 3 through an air duct 6, an air outlet of the fan 3 is connected with a tail gas treatment tower 2, the tail gas treatment tower 2 comprises a three-layer sprayer and a demister at the top, and the bottom is provided with alkaline solution.

The working principle of the utility model is that pure water, high-concentration hydrochloric acid and aluminium hydroxide powder are added into a glass lining reaction kettle 7 according to a certain mass ratio, a fan 3 is operated when feeding, negative pressure is formed at a feeding port, dissipated hydrogen chloride gas and scattered aluminium hydroxide dust are pumped into a tail gas treatment tower 2 by the fan 3 for harmless treatment, a stirring component 18 in the glass lining reaction kettle 7 is operated, the feeding port of the glass lining reaction kettle 7 is closed after feeding is finished, steam pressure is adjusted by a steam distributing cylinder 12 and then the mixture is introduced into a jacket 17 on the outer wall of the glass lining reaction kettle 7, and temperature rise is started. The temperature rise process focuses closely on the pressure within glass-lined reactor 7 and its jacket 17, and during the reaction the stirring assembly 18 of glass-lined reactor 7 is running. After the reaction is finished, the steam sub-cylinder 12 is closed, the pressure in the glass lining reaction kettle 7 is slowly reduced, a valve at a discharge port at the bottom of the glass lining reaction kettle 7 is opened when the pressure is reduced to 0Mpa, the polyaluminium chloride solution obtained by the reaction in the glass lining reaction kettle 7 enters a membrane filter press 10 through a third chemical pump 9 to remove residual reaction impurities, and the filtered polyaluminium chloride solution is sent to a tempering tank 13 through a fourth chemical pump 11 to detect the basicity, the alumina content, the PH value and the like. And (3) checking whether indexes such as the content of alumina (10 +/-0.5%), the basicity (41.6-48.6%), the pH value (4.5-5) and the like meet the standard, pumping the alumina into a finished product tank 15 through a fifth chemical pump 14 when the indexes meet the standard, adjusting the mass ratio of materials in the next reaction kettle after calculation, and adjusting products meeting process indexes after mixing and stirring products in the next reaction kettle and a product in a tempering tank.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. The polyaluminium chloride preparation device is characterized by comprising a glass lining reaction kettle (7), wherein the outer wall of the glass lining reaction kettle (7) is provided with a jacket (17) which is arranged in a surrounding manner, the jacket (17) is connected with a steam adjusting assembly, the bottom of the glass lining reaction kettle (7) is provided with a discharge hole, and the discharge hole of the glass lining reaction kettle (7) is connected with a membrane filter press (10).

2. The polyaluminium chloride production apparatus according to claim 1, wherein a feed inlet is arranged at the top of the glass lining reaction kettle (7), and a tail gas treatment component is arranged above the feed inlet and connected with the tail gas treatment component.

3. The aluminum polychloride preparation device as claimed in claim 2, wherein the tail gas treatment component comprises a fan (3), an air inlet of the fan (3) is connected with an air duct (6), the air duct (6) is connected with a gas collecting hood (8), the gas collecting hood (8) is arranged above a feeding port of the glass lining reaction kettle (7), the tail gas treatment component comprises a tail gas treatment tower (2), and an air outlet of the fan (3) is connected with the tail gas treatment tower (2).

4. The apparatus for producing polyaluminium chloride according to claim 1 or 2 wherein the membrane filter press (10) is connected to a conditioning tank (13).

5. The aluminum polychloride production plant as claimed in claim 4, characterized in that the tempering tank (13) is connected to a finished tank (15).

6. The aluminum polychloride production apparatus of claim 3, wherein the tail gas treatment tower (2) comprises a sprayer and a demister, and the bottom of the sprayer and the demister is provided with an alkaline solution.

7. The apparatus for producing polyaluminium chloride according to claim 1 or 2 wherein said steam adjusting unit comprises a steam distributing cylinder (12).

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