Sulfuric acid preparation control system

Abstract

The utility model provides a sulfuric acid preparation control system, which belongs to the technical field of sulfuric acid preparation and comprises a sulfuric acid diluter, a concentrated acid pipeline and a pure water pipeline are arranged on the sulfuric acid diluter, a concentrated acid pump is arranged on the concentrated acid pipeline, a pure water pump is arranged on the pure water pipeline, and a diluted acid concentration meter is arranged in the sulfuric acid diluter. And the device further comprises a PLC (Programmable Logic Controller) which is respectively in signal connection with the concentrated acid pump, the pure water pump and the dilute acid concentration meter. The flow of concentrated sulfuric acid and pure water can be adjusted in real time so as to ensure that the concentration of dilute acid reaches the set concentration.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sulfuric acid preparation technical field especially relates to a sulfuric acid preparation control system. BACKGROUND

[0002] Dilute sulfuric acid is mainly used for adjusting pH value and treating specific chemical reactions in wastewater treatment. For example, in the process of treating wastewater containing heavy metals, dilute sulfuric acid can be used as a dehydrating agent to help remove suspended solids and impurities in wastewater. In addition, dilute sulfuric acid can also be used as a catalyst for certain chemical reactions to help speed up the reaction process.

[0003] Currently, the concentration of industrial sulfuric acid is usually 93% to 98% concentrated sulfuric acid. In order to make it available for wastewater treatment, concentrated sulfuric acid is often diluted to a specific concentration of dilute sulfuric acid. The commonly used method of diluting concentrated sulfuric acid is that workers add pure water and concentrated sulfuric acid to the diluter according to the required concentration ratio, and obtain the corresponding concentration of dilute sulfuric acid by stirring.

[0004] In this method, the amount of pure water and concentrated acid added is basically estimated by the operator, so there is an error in each amount, and the concentration error of the prepared dilute acid is large. At the same time, considering the strong corrosive nature of concentrated acid, it may pose a threat to the personal safety of on-site workers.

[0005] In the prior art, the amount of pure water and concentrated sulfuric acid is controlled by a control device, which can reduce the error of each amount and avoid too large concentration error of the prepared dilute sulfuric acid. However, this method cannot adjust the amount of pure water and concentrated sulfuric acid in real time. Since there are differences in concentration between different batches of concentrated sulfuric acid, when the concentration difference between the later added concentrated sulfuric acid and the previously added concentrated sulfuric acid is too large, it is impossible to ensure that the diluted concentrated sulfuric acid reaches the set concentration. SUMMARY

[0006] In view of the defects or deficiencies in the prior art, the present utility model provides a sulfuric acid preparation control system which can adjust the flow of concentrated sulfuric acid and pure water in real time to ensure that the concentration of dilute acid reaches the set concentration.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] The embodiment of the utility model provides a sulfuric acid preparation control system, which comprises a sulfuric acid diluter, a concentrated acid pipeline and a pure water pipeline are arranged on the sulfuric acid diluter, a concentrated acid pump is arranged on the concentrated acid pipeline, a pure water pump is arranged on the pure water pipeline, and a dilute acid concentration meter is arranged in the sulfuric acid diluter.

[0009] It also comprises a PLC controller, which is signal connected with the concentrated acid pump, the pure water pump and the dilute acid concentration meter respectively.

[0010] Furthermore, the sulfuric acid diluter is connected to a concentrated acid storage tank via a concentrated acid pipeline, and the sulfuric acid diluter is connected to a pure water pump via a pure water pipeline.

[0011] Furthermore, a concentrated acid flow meter is also installed on the concentrated acid pipeline, and the concentrated acid flow meter is located between the concentrated acid pump and the sulfuric acid diluent.

[0012] Furthermore, the concentrated acid flow meter is connected to the PLC controller via signal transmission.

[0013] Furthermore, a pure water flow meter is also installed on the pure water pipeline, and the pure water flow meter is located between the pure water pump and the sulfuric acid diluent.

[0014] Furthermore, the pure water flow meter is connected to the PLC controller via signal.

[0015] Furthermore, the sulfuric acid diluent is equipped with a cooling water circulation device, which includes a cooling water pipe located inside the sulfuric acid diluent.

[0016] Furthermore, both the outlet and inlet of the cooling water pipe are connected to the heat exchanger.

[0017] Furthermore, the sulfuric acid diluent is provided with an outlet at the bottom, and the outlet of the sulfuric acid diluent is connected to a dilute acid storage tank via a pipe.

[0018] Furthermore, the PLC controller is also connected to the touchscreen signal.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention involves installing a dilute acid concentration meter inside a sulfuric acid diluter, and installing a concentrated acid pump and a pure water pump on the concentrated acid pipeline and pure water pipeline, respectively. All three pumps—the dilute acid concentration meter, the concentrated acid pump, and the outlet water pump—are connected to a PLC controller. The dilute acid concentration meter detects the current sulfuric acid concentration in the diluter and transmits this information to the PLC controller. Based on the current and preset dilute sulfuric acid concentrations, the PLC controller determines whether to adjust the concentrated sulfuric acid flow rate or the pure water flow rate. When the current concentration differs from the preset concentration, the PLC controller uses a preset concentration calculation formula to determine the required concentrated sulfuric acid or pure water flow rate and adjusts the flow rate of pure water or concentrated sulfuric acid injected into the diluter by controlling the pure water pump or the concentrated acid pump. This ensures that the dilute sulfuric acid concentration reaches the preset level regardless of changes in the concentrated acid concentration. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the sulfuric acid preparation control system in an embodiment of this utility model;

[0022] The components include: 1. Sulfuric acid diluter; 2. Concentrated acid pump; 3. Concentrated acid flow meter; 4. Pure water pump; 5. Pure water flow meter; 6. PLC controller; 7. Dilute acid concentration meter; and 8. Touch screen. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] A typical embodiment of this utility model is as follows: Figure 1 As shown, a sulfuric acid preparation control system includes a sulfuric acid diluter 1, which is equipped with a concentrated acid pipeline and a pure water pipeline. The sulfuric acid diluter 1 is connected to a concentrated acid storage tank through the concentrated acid pipeline. A concentrated acid pump 2 is installed on the concentrated acid pipeline. The concentrated acid pump 2 has high corrosion resistance and can transport concentrated sulfuric acid from the concentrated acid storage tank to the sulfuric acid diluter 1. A concentrated acid flow meter 3 is also installed on the concentrated acid pipeline. The concentrated acid flow meter 3 is located between the concentrated acid pump 2 and the sulfuric acid diluter 1 and is used to detect the flow rate of concentrated sulfuric acid during the dilution process.

[0025] The sulfuric acid diluter 1 is connected to a pure water storage tank via a pure water pipeline. A pure water pump 4 is installed on the pure water pipeline. The pure water pump 4 is a common water pump on the market, which can transport pure water from the pure water storage tank to the sulfuric acid diluter 1. A pure water flow meter 5 is also installed on the pure water pipeline. The pure water flow meter 5 is located between the pure water pump 4 and the sulfuric acid diluter 1 and is used to detect the pure water flow during the dilution process.

[0026] By installing a concentrated acid pump 2 on the concentrated acid pipeline and a pure water pump 4 on the pure water pipeline, the flow rate of concentrated acid and pure water injected into the sulfuric acid diluter 1 can be precisely controlled. Compared with the traditional valve control method, the control accuracy is improved, ensuring that the concentration of dilute sulfuric acid reaches the set concentration.

[0027] The sulfuric acid diluter 1 is equipped with a mixing tank and an overflow tank, which can accelerate the mixing speed of pure water and concentrated sulfuric acid, thereby improving the dilution efficiency of dilute sulfuric acid. This is existing technology and will not be described in detail here.

[0028] The sulfuric acid diluter 1 is equipped with a cooling water circulation device, which includes a cooling water pipe located inside the sulfuric acid diluter 1 and wrapped around the inner wall of the sulfuric acid diluter 1. The outlet and inlet of the cooling water pipe are both connected to a heat exchanger. The cooling water circulation device removes the heat generated during the sulfuric acid dilution process.

[0029] The sulfuric acid diluter 1 has an outlet at the bottom. The outlet of the sulfuric acid diluter 1 is connected to the dilute acid storage tank through a pipe. Dilute sulfuric acid flows out from the outlet of the sulfuric acid diluter 1 and enters the dilute acid storage tank for storage.

[0030] Furthermore, it also includes a PLC controller 6, which is electrically connected to the concentrated acid pump 2, the pure water pump 4, the concentrated acid flow meter 3, and the pure water flow meter 5, respectively. The PLC controller 6 can receive the concentrated sulfuric acid flow signal sent by the concentrated acid flow meter 3 and the pure water flow signal sent by the pure water flow meter 5. At the same time, the PLC controller 6 controls the flow rates of concentrated sulfuric acid and pure water by controlling the concentrated acid pump 2 and the pure water pump 4.

[0031] A dilute acid concentration meter 7 is installed inside the sulfuric acid diluter 1. The dilute acid concentration meter 7 is electrically connected to the PLC controller 6. The dilute acid concentration meter 7 can detect the current dilute sulfuric acid concentration in the sulfuric acid diluter 1 and transmit the current dilute sulfuric acid concentration information to the PLC controller 6. The PLC controller 6 determines whether it is necessary to adjust the concentrated sulfuric acid flow rate or the pure water flow rate based on the current dilute sulfuric acid concentration information and the preset dilute sulfuric acid concentration information. When the current dilute sulfuric acid concentration is inconsistent with the preset dilute sulfuric acid concentration, the required concentrated sulfuric acid flow rate or pure water flow rate is determined by the concentration calculation formula preset in the PLC controller 6, and the pure water pump 4 or concentrated acid pump 2 is controlled to adjust the pure water flow rate or concentrated sulfuric acid flow rate injected into the sulfuric acid diluter 1. Thus, no matter how the concentrated acid concentration changes, the concentration of dilute sulfuric acid can be guaranteed to reach the preset concentration.

[0032] The concentration calculation formula preset in the PLC controller 6 is known in the prior art and can be implemented by those skilled in the art.

[0033] The PLC controller 6 is also connected to the touch screen 8, which can display the acid production process and data in real time. It can also issue commands such as sulfuric acid dilution coefficient, concentration input, and equipment start / stop control.

[0034] In use, first input the desired concentration of dilute sulfuric acid on the touch screen. The PLC controller confirms the flow rate of concentrated sulfuric acid and pure water injected into the sulfuric acid diluent based on the preset dilute sulfuric acid concentration information. The dilute acid concentration meter detects the current concentration of dilute sulfuric acid in the sulfuric acid diluent in real time and transmits the current concentration information to the PLC controller 6. The PLC controller 6 confirms whether the flow rate of concentrated sulfuric acid or pure water needs to be adjusted based on the current concentration information and the preset concentration information. If the current concentration of dilute sulfuric acid is inconsistent with the preset concentration, the required flow rate of concentrated sulfuric acid or pure water is determined by the concentration calculation formula preset in the PLC controller, and the pure water pump or concentrated acid pump is controlled to adjust the flow rate of pure water or concentrated sulfuric acid injected into the sulfuric acid diluent to ensure that the concentration of dilute sulfuric acid reaches the preset concentration.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sulfuric acid preparation control system, characterized in that, The device includes a sulfuric acid diluter, which is equipped with a concentrated acid pipeline and a pure water pipeline. A concentrated acid pump is installed on the concentrated acid pipeline, and a pure water pump is installed on the pure water pipeline. A dilute acid concentration meter is installed inside the sulfuric acid diluter. It also includes a PLC controller, which is connected to the concentrated acid pump, the pure water pump and the dilute acid concentration meter respectively.

2. The sulfuric acid preparation control system as described in claim 1, characterized in that, The sulfuric acid diluter is connected to a concentrated acid storage tank via a concentrated acid pipeline, and the sulfuric acid diluter is connected to a pure water pump via a pure water pipeline.

3. The sulfuric acid preparation control system as described in claim 1, characterized in that, The concentrated acid pipeline is also equipped with a concentrated acid flow meter, which is located between the concentrated acid pump and the sulfuric acid diluent.

4. The sulfuric acid preparation control system as described in claim 3, characterized in that, The concentrated acid flow meter is connected to the PLC controller via signal transmission.

5. A sulfuric acid preparation control system as described in claim 1, characterized in that, A pure water flow meter is also installed on the pure water pipeline, and the pure water flow meter is located between the pure water pump and the sulfuric acid diluent.

6. The sulfuric acid preparation control system as described in claim 5, characterized in that, The pure water flow meter is connected to the PLC controller via signal transmission.

7. The sulfuric acid preparation control system as described in claim 1, characterized in that, The sulfuric acid diluter is equipped with a cooling water circulation device, which includes a cooling water pipe located inside the sulfuric acid diluter.

8. A sulfuric acid preparation control system as described in claim 7, characterized in that, The outlet and inlet of the cooling water pipe are both connected to the heat exchanger.

9. A sulfuric acid preparation control system as described in claim 1, characterized in that, The sulfuric acid diluter has an outlet at the bottom, and the outlet of the sulfuric acid diluter is connected to a dilute acid storage tank via a pipe.

10. A sulfuric acid preparation control system as described in claim 1, characterized in that, The PLC controller is also connected to the touch screen signal.

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