Online sulfuric acid density measuring device

Abstract

The utility model relates to the technical field of chemical engineering, and provides an on-line sulfuric acid density measuring device, which solves the problem that the production is influenced due to the fact that the existing chlorine drying device cannot measure the sulfuric acid density in time, and comprises a filler drying tower, a circulating pump and a heat exchanger, the circulating pump is connected with an inlet of the heat exchanger, an outlet of the heat exchanger is connected with the packing drying tower through a plurality of return pipes, a density meter is arranged on one return pipe, a plurality of trays are arranged in the packing drying tower, the trays are arranged at intervals from bottom to top, one side of each tray is provided with an opening, each tray is provided with a plurality of through holes, and the through holes are communicated with the packing drying tower. The top of each through hole is provided with a flow sealing table, the top of each flow sealing table is provided with a sealing plate capable of being turned upwards to be opened, and by additionally arranging the density meter, workers can directly regulate and control production in time according to 24-hour real-time online data.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to an online sulfuric acid density measuring device. Background Art

[0002] Chinese patent publication number CN213253752U discloses a chlorine scrubbing tower, comprising a first tower plate, a packing layer and a second tower plate arranged inside the tower body from bottom to top, and a delivery pump and a cooler arranged outside the tower body for realizing the circulation of a cooling and drying liquid medium; an input port for the cooling and drying liquid medium is provided on the tower body.

[0003] The utility model usually uses concentrated sulfuric acid for dehydration. When sulfuric acid is used to dehydrate chlorine, the density of sulfuric acid in the tower body needs to be controlled above 75% to ensure the quality of chlorine water. However, the device needs to manually take samples to measure the density of sulfuric acid and take them back to the laboratory for density analysis. During the sampling and analysis process, improper operation will endanger personal safety. At the same time, the density analysis has a lag, which affects the timely regulation of production. Utility Model Content

[0004] Therefore, in view of the above problems, the utility model provides an online sulfuric acid density measuring device to solve the problem that the existing chlorine drying device cannot measure the sulfuric acid density in time and affects production.

[0005] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0006] An online sulfuric acid density determination device comprises a packed drying tower, a circulation pump and a heat exchanger, wherein the lower part of the packed drying tower is connected to the circulation pump, the circulation pump is connected to the inlet of the heat exchanger, the outlet of the heat exchanger is connected to the packed drying tower through a plurality of reflux pipes, one of the reflux pipes is provided with a density meter, a plurality of tower plates are arranged in the packed drying tower, each of the tower plates is spaced from bottom to top, one side of each of the tower plates is provided with an opening, each of the tower plates is provided with a plurality of through holes, the top of each of the through holes is provided with a sealing platform, and the top of each of the sealing platforms is provided with a sealing plate that can be flipped upward to open.

[0007] Furthermore, each of the tower plates is provided with an overflow weir at its opening, and the openings of adjacent tower plates are staggered with each other.

[0008] Furthermore, a gas inlet is provided at the lower portion of the packed drying tower, a gas outlet is provided at the top of the packed drying tower, and the pressure of the gas inlet is greater than the pressure of the gas outlet.

[0009] Furthermore, the sum of the pressure at the gas outlet and the outlet pressure of the circulation pump is less than the pressure at the gas inlet.

[0010] Furthermore, a liquid inlet is provided at the top of the packed drying tower, a liquid inlet regulating valve is provided at the liquid inlet, a liquid outlet is provided at the bottom of the packed drying tower, a liquid outlet regulating valve is provided at the liquid outlet, a liquid level sensor is provided in the packed drying tower, and the density meter, liquid inlet regulating valve, liquid outlet regulating valve, liquid level sensor and DCS control system form a control loop.

[0011] Furthermore, each of the reflux pipes is respectively arranged between adjacent tower plates.

[0012] Furthermore, the packed drying tower, circulating pump and heat exchanger are all anti-corrosion equipment.

[0013] Furthermore, chilled water is used for heat exchange in the heat exchanger.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model reduces the frequency of manual analysis and saves labor costs by adding a density meter. Since concentrated sulfuric acid is corrosive and the fumes emitted are harmful to the human body, adding a density meter can reduce contact and reduce the possibility of injury. Since manual sampling and analysis take time, adjustments are made after the analysis data comes out, which has caused delays in production. By adding a density meter, employees can directly adjust production in a timely manner based on 24-hour real-time online data.

[0016] 2. The utility model forms a liquid seal by using sulfuric acid from top to bottom through the arrangement of a sealing platform and a sealing plate, so that the chlorine gas can stay in the tower for a longer time, and more water can be removed after passing through the packing drying tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a packed drying tower according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the through hole arrangement structure of an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the sealing platform of the utility model embodiment.

[0021] Description of Figure Numbers

[0022] Packed drying tower 1; gas inlet 11; gas outlet 12; liquid inlet 13; liquid inlet regulating valve 14; liquid outlet 15; liquid outlet regulating valve 16;

[0023] Circulation pump 2;

[0024] Heat exchanger 3;

[0025] Reflux pipe 4; Density meter 41;

[0026] Tray 5; opening 51; through hole 52; sealing platform 53; sealing plate 54; overflow weir 55; right-angle piece 56;

[0027] Spray plate 6. DETAILED DESCRIPTION

[0028] The following will describe the implementation methods of the present invention in detail in conjunction with specific embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0029] Example

[0030] like Figures 1 to 4 As shown, an online sulfuric acid density determination device comprises a packed drying tower 1, a circulating pump 2 and a heat exchanger 3. The heat exchanger 3 adopts chilled water for heat exchange, which can realize rapid heat transfer and improve the operation efficiency of the device. The lower part of the packed drying tower 1 is connected to the circulating pump 2, and the circulating pump 2 is connected to the inlet of the heat exchanger 3. The outlet of the heat exchanger 3 is connected to the packed drying tower 1 through a plurality of reflux pipes 4. A density meter 41 is provided on the reflux pipe 4. There are a plurality of trays 5 in the packed drying tower 1, and each tray 5 is arranged at intervals from bottom to top. Each reflux pipe 4 is respectively arranged between adjacent trays 5. An opening 51 is provided on one side of each tray 5, and a plurality of through holes 52 are provided on each tray 5. A sealing platform 53 is provided on the top of each through hole 52, and a sealing plate 54 that can be flipped upward and opened is provided on the top of each sealing platform 53.

[0031] Each of the tower trays 5 is provided with an overflow weir 55 at the opening 51, the height of the overflow weir 55 is greater than the height of the sealing platform 53, and the openings 51 of adjacent tower trays 5 are staggered with each other; the number of the tower trays 5 is three, the number of the reflux pipes 4 is two, and two spray trays 6 are provided in the packing drying tower 1, the spray trays 6 are arranged between adjacent tower trays 5, and are respectively connected to the reflux pipes 4;

[0032] A gas inlet 11 is provided at the lower part of the packed drying tower 1, and a gas outlet 12 is provided at the top 1 of the packed drying tower. The pressure of the gas inlet 11 is greater than the pressure of the gas outlet 12. The sum of the pressure of the gas outlet 12 and the outlet pressure of the circulating pump 2 is less than the pressure of the gas inlet 11. The outlet pressure of the circulating pump 2 is preferably 0.35-0.45MPa, the pressure of the gas inlet 11 is preferably 4-6kpa, and the pressure of the gas outlet 12 is preferably 3-5kpa;

[0033] To ensure that the chlorine gas can push open the sealing plate 54 on the top of the sealing platform 53, the area of ​​the opening 51 of the tray 5 is smaller than the area of ​​the gas inlet 11;

[0034] The present application does not specifically limit the number of through holes 52, which can be adjusted according to actual conditions. One side of the sealing plate 54 is hinged to the sealing platform 53. To prevent the sealing plate 54 from being unable to return to its original position and cover the sealing platform 53 after being pushed open by chlorine gas, in this embodiment, the sealing platform 53 is provided with a right-angle piece 56 at the hinge with the sealing plate 54, and the included angle of the right-angle piece 56 in the vertical direction is less than 45°.

[0035] The packed drying tower 1 is provided with a liquid inlet 13 at the top, a liquid inlet regulating valve 14 is provided at the liquid inlet 13, a liquid outlet 15 is provided at the bottom of the packed drying tower, a liquid outlet regulating valve 16 is provided at the liquid outlet 15, a liquid level sensor (not shown in the figure) is provided in the packed drying tower 1, and the density meter 41, the liquid inlet regulating valve 14, the liquid outlet regulating valve 16, the liquid level sensor and the DCS control system form a control loop;

[0036] The packing drying tower 1, circulating pump 2 and heat exchanger 3 are all anti-corrosion equipment, which are existing public equipment and will not be described in detail here;

[0037] How it works:

[0038] When the device is started, the liquid inlet regulating valve 14 is opened to allow sulfuric acid to enter the packed drying tower 1, and part of the sulfuric acid is left on the tower plate 5. After the sulfuric acid forms a certain liquid level at the bottom of the packed drying tower 1, the liquid inlet regulating valve 14 is closed, and chlorine gas is introduced into the packed drying tower 1 from the gas inlet 11, and flows upward from the opening 51 and the through hole 52 provided on the tower plate 5. The sulfuric acid in the tower passes through the circulation pump 2, the heat exchanger 3 and the reflux pipe 4, and is sprayed out by the spray plate 6 to contact with the chlorine gas in countercurrent.

[0039] When the density meter 41 detects that the density of the refluxed sulfuric acid is less than 75%, the gas inlet 11 stops taking in air, the liquid outlet regulating valve 16 opens, and the sulfuric acid at the bottom of the packed drying tower 1 is released, and then the liquid inlet regulating valve 14 opens to reintroduce high-density sulfuric acid. Since the sulfuric acid in the reflux pipe 4 is the sulfuric acid flowing into the packed drying tower 1, the density meter 41 is arranged on the reflux pipe, which is not affected by temperature compared to the circulating pump 2 pipeline, and the detection data is more accurate.

[0040] When the liquid level sensor detects that the liquid level is too high, the gas inlet 11 stops taking in gas, the liquid outlet regulating valve 16 opens, and some sulfuric acid at the bottom of the packed drying tower 1 is released. Then the liquid outlet regulating valve 16 is closed, and the gas inlet 11 starts taking in gas again.

[0041] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. An online sulfuric acid density measuring device, comprising a packed drying tower, a circulating pump and a heat exchanger, characterized in that: The lower part of the packed drying tower is connected to a circulation pump, the circulation pump is connected to the inlet of the heat exchanger, the outlet of the heat exchanger is connected to the packed drying tower through a plurality of reflux pipes, one of the reflux pipes is provided with a density meter, a plurality of tower plates are arranged in the packed drying tower, each of the tower plates is spaced from bottom to top, one side of each of the tower plates is provided with an opening, each of the tower plates is provided with a plurality of through holes, the top of each of the through holes is provided with a sealing platform, and the top of each of the sealing platforms is provided with a sealing plate that can be flipped upward to open.

2. An on-line sulfuric acid density measuring device according to claim 1, characterized in that: Each of the tower plates is provided with an overflow weir at its opening, and the openings of adjacent tower plates are staggered with each other.

3. An on-line sulfuric acid density measuring device according to claim 1, characterized in that: A gas inlet is provided at the lower part of the packed drying tower, and a gas outlet is provided at the top of the packed drying tower. The pressure of the gas inlet is greater than the pressure of the gas outlet.

4. An on-line sulfuric acid density measuring device according to claim 3, characterized in that: The sum of the pressure at the gas outlet and the outlet pressure of the circulation pump is less than the pressure at the gas inlet.

5. An on-line sulfuric acid density measuring device according to claim 1, characterized in that: A liquid inlet is provided at the upper portion of the packed drying tower, a liquid inlet regulating valve is provided at the liquid inlet, a liquid outlet is provided at the lower portion of the packed drying tower, a liquid outlet regulating valve is provided at the liquid outlet, a liquid level sensor is provided in the packed drying tower, and the density meter, the liquid inlet regulating valve, the liquid outlet regulating valve, the liquid level sensor and the DCS control system form a control loop.

6. An on-line sulfuric acid density measuring device according to claim 1, characterized in that: Each of the reflux pipes is respectively arranged between adjacent tower plates.

7. An on-line sulfuric acid density measuring device according to any one of claims 1 to 6, characterized in that: The packing drying tower, circulating pump and heat exchanger are all anti-corrosion equipment.

8. An on-line sulfuric acid density measuring device according to claim 1, characterized in that: Chilled water is used for heat exchange in the heat exchanger.

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