A low-molybdenum type anti-flash rust agent production device with controllable PH value

Abstract

The utility model belongs to the technical field of anti - flash rust inhibitor production equipment, concretely relates to a kind of low molybdenum type anti - flash rust inhibitor production device of ph value regulation and control, including reaction kettle, reaction kettle is connected by positive pressure feeding line communication acid storage high tank, alkali storage high tank, and positive pressure feeding line includes two discharge pipes, the tank bottom of two discharge pipes is communicated respectively the acid storage high tank, alkali storage high tank, discharge pipe is connected with feed pipe, feed pipe is connected with venturi pipe throat part, and venturi pipe is installed on nitrogen tube, and nitrogen tube is connected with spray pipe, and one end of spray pipe inserted into reaction kettle interior is equipped with atomizing nozzle, and regulating valve and float flowmeter are installed on feed pipe. By observing float flowmeter and adjusting regulating valve, acid liquor or alkali liquor is added into reaction kettle at uniform speed, controllable, and production efficiency and production quality are considered;Gas-liquid mixture is sprayed at high speed by atomizing nozzle, so that acid liquor or alkali liquor is fully and uniformly contacted with reaction liquid, and side reaction caused by local over-acid or over-alkali of reaction liquid is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of flash rust prevention agent production equipment, specifically relating to a low-molybdenum flash rust prevention agent production device with adjustable pH value. Background Technology

[0002] In the production process of flash rust inhibitors, precise control of the pH value of the reaction solution is crucial. As a functional product that can effectively prevent flash rust from appearing on metal surfaces during or shortly after coating, the performance of flash rust inhibitors largely depends on the control of various parameters in the production process, among which the precise adjustment of the pH value directly affects the quality and stability of the product.

[0003] Traditional low-molybdenum flash rust inhibitor production equipment suffers from numerous problems in pH control. On one hand, it is often difficult to achieve uniform and controllable addition of adjusting acid or alkali solutions to the reactor. Common methods include manual pouring, which is not only inefficient but also extremely difficult to precisely control the amount added, easily leading to large fluctuations in the pH of the reaction solution and affecting product quality consistency; or simple gravity-flow addition through pipelines, lacking effective flow control methods, which also cannot meet the precise requirements for the addition rate of acid or alkali solutions during production, making it difficult to balance production efficiency and quality.

[0004] On the other hand, existing additive devices also have shortcomings in ensuring uniform mixing of acid or alkali solutions with the reaction solution. If the acid or alkali solution cannot quickly and uniformly contact the reaction solution after entering the reactor, it can cause localized over-acidity or over-alkaliness in the reaction solution. This localized acid-base imbalance can easily trigger side reactions, generating impurities or altering the effective components of the anti-flash rust agent, thereby reducing product performance. For example, in some traditional devices, the acid or alkali solution is poured directly from the top of the reactor. Due to the lack of effective dispersion and mixing measures, a large acid-base concentration gradient forms on the surface of the reaction solution, leading to uneven reaction and severely affecting product quality. Utility Model Content

[0005] To address the above problems, the purpose of this utility model is to provide a low-molybdenum anti-flash rust agent production device with adjustable pH value, thereby solving the problem that existing low-molybdenum anti-flash rust agent production devices are difficult to effectively control in terms of pH value precision and mixing uniformity.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a low-molybdenum anti-flash rust agent production device with adjustable pH value, comprising a reaction vessel, an acid storage tank, an alkali storage tank, and a positive pressure feeding pipeline. The acid storage tank and the alkali storage tank are connected to the reaction vessel via the positive pressure feeding pipeline. The positive pressure feeding pipeline includes two discharge pipes, one end of which is connected to the bottom of the acid storage tank and the alkali storage tank, respectively. The other end of each discharge pipe is connected to a feed pipe, the top end of which is connected to the throat of a Venturi tube. The two Venturi tubes are installed alternately on a nitrogen pipe. One end of the nitrogen pipe is equipped with a nitrogen valve, and the other end is connected to a spray pipe. The end of the spray pipe inserted into the reaction vessel is equipped with an atomizing nozzle. A regulating valve and a float flow meter are installed on the feed pipe.

[0007] The beneficial effects of this invention are as follows: When nitrogen flows through the venturi tube, by observing the float flow meter and adjusting the opening and closing of the regulating valve, the acid or alkali solution in the high-level acid storage tank or high-level alkali storage tank is added to the reaction vessel at a uniform and controllable speed, taking into account both production efficiency and production quality; the gas-liquid mixture is atomized and sprayed out through the atomizing nozzle under the action of high-speed flow, so that the acid or alkali solution is fully and uniformly contacted with the reaction liquid, avoiding the side reactions caused by local over-acidity or over-alkaliness of the reaction liquid.

[0008] To prevent acid or alkali solutions from spraying onto the inner wall of the reactor;

[0009] As a further improvement to the above technical solution: the nozzle of the atomizing nozzle is tilted downwards toward the axis of the reactor.

[0010] The beneficial effects of this improvement are as follows: by selecting an atomizing nozzle of appropriate specifications according to the specifications of the reactor and the conventional internal pressure of the nitrogen pipe, the liquid droplets sprayed by the tilted atomizing nozzle can fall more comprehensively on the surface of the reaction liquid and avoid directly spraying onto the inner wall of the reactor, thereby reducing the adjustment error caused by acid and alkali solutions adhering to the wall while ensuring adjustment efficiency.

[0011] For convenient replacement and maintenance of the atomizing nozzle;

[0012] As a further improvement to the above technical solution: the spray pipe slides through the flange pipe, the flange pipe is fixed on the reactor, a connecting flange is welded on the spray pipe, one end of the spray pipe is connected to the nitrogen pipe through the flange and bolts, and the connecting flange is connected to the flange at the top of the flange pipe through bolts.

[0013] The beneficial effects of this improvement are: the spray pipe is connected to the nitrogen pipe and flange pipe through flange bolts, and can be easily removed after the bolts are unfastened, so as to clean the atomizing nozzle.

[0014] In order to effectively ensure the sealing of high-level acid storage tanks and high-level alkali storage tanks;

[0015] As a further improvement to the above technical solution: a tank bottom valve is installed between the discharge pipe and the feed pipe.

[0016] The beneficial effects of this improvement are: when the regulating valve is used at high frequency to adjust the feeding speed, the sealing surface wears faster, and the added bottom valve can effectively ensure the sealing performance of the acid storage tank and the alkali storage tank.

[0017] In order to accurately control the nitrogen pressure and avoid the spraying pressure of the atomizing nozzle being too high or too low, thus affecting the spraying range;

[0018] As a further improvement to the above technical solution: a pressure gauge is installed on the nitrogen pipe, and the nitrogen valve is connected to a nitrogen system pipeline.

[0019] The beneficial effect of this improvement is that operators can stably control the spray pressure of the atomizing nozzle by observing the pressure gauge and adjusting the valve size of the nitrogen valve.

[0020] To facilitate the replenishment of materials into the high-level acid storage tank and the high-level alkali storage tank;

[0021] As a further improvement to the above technical solution: the top of the acid storage tank and the alkali storage tank are each connected to a separate feed pipe, and the other end of the two feed pipes are respectively connected to the acid storage tank and the alkali storage tank.

[0022] The beneficial effects of this improvement are that acid and alkali storage tanks can be replenished to high-level acid and alkali storage tanks by pumping or other means as described in the prior art.

[0023] In order to effectively improve the feeding efficiency of Venturi tubes;

[0024] As a further improvement to the above technical solution: a reducing pipe with a decreasing diameter is connected between the discharge pipe and the feed pipe.

[0025] The beneficial effects of this improvement are: the reduced diameter of the feed pipe further increases the flow rate of the material entering the venturi tube, thereby improving the feeding efficiency.

[0026] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the present invention, which removes the reaction vessel.

[0029] Figure 3 This is an enlarged view of A in this utility model;

[0030] In the diagram: 1. Reactor; 2. High-level acid storage tank; 3. High-level alkali storage tank; 4. Positive pressure feeding pipeline; 5. Discharge pipe; 6. Tank bottom valve; 7. Feed pipe; 8. Regulating valve; 9. Float flow meter; 10. Venturi tube; 11. Nitrogen pipe; 12. Nitrogen valve; 13. Pressure gauge; 14. Feed pipe; 15. Spray pipe; 16. Connecting flange; 17. Flange pipe; 18. Atomizing nozzle. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0032] Example 1:

[0033] like Figure 1As shown in Figure 3: A low-molybdenum anti-flash rust agent production device with adjustable pH value includes a reactor 1, an acid storage tank 2, an alkali storage tank 3, and a positive pressure feeding pipeline 4. The acid storage tank 2 and the alkali storage tank 3 are connected to the reactor 1 through the positive pressure feeding pipeline 4. The positive pressure feeding pipeline 4 includes two discharge pipes 5. One end of each discharge pipe 5 is connected to the bottom of the acid storage tank 2 and the alkali storage tank 3, respectively. The other end of each discharge pipe 5 is connected to an inlet pipe 7. The top end of the inlet pipe 7 is connected to the throat of a venturi tube 10. The two venturi tubes 10... A nitrogen valve 12 is installed at one end of a nitrogen pipe 11, and a spray pipe 15 is connected to the other end of the nitrogen pipe 11. An atomizing nozzle 18 is installed at one end of the spray pipe 15 that is inserted into the reactor 1. A regulating valve 8 and a float flow meter 9 are installed on the feed pipe 7. When nitrogen flows through the venturi tube 10, the acid or alkali solution in the acid storage tank 2 or alkali storage tank 3 is added to the reactor 1 at a uniform and controllable speed by observing the float flow meter 9 and adjusting the opening and closing size of the regulating valve 8, thus taking into account both production efficiency and production quality.The gas-liquid mixture is atomized and sprayed out through the atomizing nozzle 18 under the action of high-speed flow, so that the acid or alkali solution is fully and uniformly contacted with the reaction solution, avoiding local over-acidity or over-alkaliness of the reaction solution and causing side reactions. The nozzle of the atomizing nozzle 18 is tilted downwards towards the axis of the reaction vessel 1. The appropriate specification of the atomizing nozzle 18 is selected according to the specifications of the reaction vessel 1 and the conventional internal pressure of the nitrogen pipe 11, so that the liquid droplets sprayed by the tilted atomizing nozzle 18 can fall more evenly on the surface of the reaction solution, and avoid directly spraying onto the inner wall of the reaction vessel 1. To minimize adjustment errors caused by acid and alkali residue adhering to the walls while ensuring adjustment efficiency, the spray pipe 15 slides through the flange pipe 17, which is fixed to the reactor 1. A connecting flange 16 is welded to the spray pipe 15. One end of the spray pipe 15 is connected to the nitrogen pipe 11 via a flange and bolts. The connecting flange 16 is connected to the flange at the top of the flange pipe 17 via bolts. The spray pipe 15 is connected to the nitrogen pipe 11 and the flange pipe 17 via flange bolts. It can be easily removed after unscrewing the bolts. The atomizing nozzle 18 is cleaned. A bottom valve 6 is installed between the discharge pipe 5 and the feed pipe 7. When the regulating valve 8 is used frequently to adjust the feeding speed, the sealing surface wears quickly. The added bottom valve 6 can effectively ensure the sealing of the acid storage tank 2 and the alkali storage tank 3. A pressure gauge 13 is installed on the nitrogen pipe 11, and the nitrogen valve 12 is connected to the nitrogen system pipeline. The operator can observe the pressure gauge 13 and adjust the valve size of the nitrogen valve 12 to stably control the spray pressure of the atomizing nozzle 18. The tops of the acid storage tank 2 and the alkali storage tank 3 are each connected to a separate feed pipe 14. The other ends of the two feed pipes 14 are connected to the acid storage tank and the alkali storage tank, respectively. The acid storage tank and the alkali storage tank can replenish materials to the acid storage tank 2 and the alkali storage tank 3 through pumps or other means in the prior art. A reducer pipe with a decreasing diameter is connected between the discharge pipe 5 and the feed pipe 7. The reduced diameter of the feed pipe 7 further increases the flow rate of the material entering the venturi tube 10, thereby improving the feeding efficiency.

[0034] The working principle of this technical solution is as follows: the stirring system, jacket temperature control system, and other feeding and venting pipeline systems in reactor 1 are all implemented using existing mature technologies according to actual process requirements, without the need for special modifications; based on the current pH value of the reaction liquid in reactor 1 and the target pH value... The value determines whether acid or alkali needs to be added. If acid is needed, open the bottom valve 6 on the discharge pipe 5 at the bottom of the acid storage tank 2, and simultaneously open the regulating valve 8 on the corresponding feed pipe 7. At this time, open the nitrogen valve 12, and nitrogen flows from the nitrogen system pipeline into the nitrogen pipe 11. When the nitrogen flows through the venturi tube 10, due to the special structure of the venturi tube 10, the flow velocity at the throat increases and the pressure decreases, forming a negative pressure. Under the action of negative pressure, the acid in the acid storage tank 2 is drawn into the venturi tube 10 through the discharge pipe 5 and the feed pipe 7, and mixes with the high-speed flowing nitrogen to form a gas-liquid mixture. The operator observes the reading of the float flowmeter 9 and adjusts the opening and closing size of the regulating valve 8 to precisely control the acid feed rate and achieve uniform acid feed. The solution is controllably added to the reactor 1. Similarly, if alkali solution needs to be added, the pipeline system corresponding to the high-level alkali storage tank 3 is operated. Under the action of high-speed flow, the gas-liquid mixture is atomized and sprayed out from the atomizing nozzle 18 installed at one end of the spray pipe 15 inserted into the reactor 1 through the spray pipe 15 connected to the nitrogen pipe 11. Since the nozzle of the atomizing nozzle 18 is tilted downward toward the axis of the reactor 1, the sprayed acid or alkali solution droplets can fall more comprehensively on the surface of the reaction liquid, avoiding direct spraying onto the inner wall of the reactor 1. This reduces the adjustment error caused by acid or alkali solution adhering to the wall while ensuring adjustment efficiency. At the same time, the high-speed sprayed atomized droplets are in full and uniform contact with the reaction liquid, effectively avoiding side reactions caused by local over-acidity or over-alkaliness of the reaction liquid.

[0035] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A low-molybdenum anti-flash rust agent production device with adjustable pH value, characterized in that: The system includes a reactor (1), an acid storage tank (2), an alkali storage tank (3), and a positive pressure feeding pipeline (4). The acid storage tank (2) and the alkali storage tank (3) are connected to the reactor (1) via the positive pressure feeding pipeline (4). The positive pressure feeding pipeline (4) includes two discharge pipes (5). One end of each discharge pipe (5) is connected to the bottom of the acid storage tank (2) and the alkali storage tank (3), respectively. The other end of each discharge pipe (5) is connected to a feed pipe (7). The top end of the feed pipe (7) is connected to the throat of the venturi tube (10). Two venturi tubes (10) are installed at intervals on the nitrogen pipe (11). A nitrogen valve (12) is installed at one end of the nitrogen pipe (11). A spray pipe (15) is connected to the other end of the nitrogen pipe (11). An atomizing nozzle (18) is installed at the end of the spray pipe (15) that is inserted into the reactor (1). A regulating valve (8) and a float flow meter (9) are installed on the feed pipe (7).

2. The low-molybdenum anti-flash rust agent production device with adjustable pH value according to claim 1, characterized in that: The nozzle (18) of the atomizing nozzle is tilted downward toward the axis of the reactor (1).

3. The low-molybdenum anti-flash rust agent production device with adjustable pH value according to claim 1, characterized in that: The spray pipe (15) slides through the flange pipe (17), the flange pipe (17) is fixed on the reactor (1), the spray pipe (15) is welded with a connecting flange (16), one end of the spray pipe (15) is connected to the nitrogen pipe (11) through the flange and bolts, and the connecting flange (16) is connected to the flange at the top of the flange pipe (17) through bolts.

4. The low-molybdenum anti-flash rust agent production device with adjustable pH value according to claim 1, characterized in that: A bottom valve (6) is installed between the discharge pipe (5) and the feed pipe (7).

5. The low-molybdenum anti-flash rust agent production device with adjustable pH value according to claim 1, characterized in that: A pressure gauge (13) is installed on the nitrogen pipe (11), and the nitrogen valve (12) is connected to the nitrogen system pipeline.

6. The low-molybdenum anti-flash rust agent production device with adjustable pH value according to claim 1, characterized in that: The top of the acid storage tank (2) and the alkali storage tank (3) are each connected to a separate feed pipe (14), and the other ends of the two feed pipes (14) are respectively connected to the acid storage tank and the alkali storage tank.

7. The low-molybdenum anti-flash rust agent production device with adjustable pH value according to claim 1, characterized in that: A reducing pipe with a decreasing diameter is connected between the discharge pipe (5) and the feed pipe (7).

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