Device capable of automatically controlling and measuring concentration of calcium hydroxide solution

Abstract

The utility model discloses a device capable of automatically controlling and measuring the concentration of a calcium hydroxide solution, which comprises a configuration tank, a stirring device, an automatic control device, an automatic control device and an automatic control device, and is characterized in that a stirrer is arranged in the configuration tank, and a top feed port is connected with a bottom discharge port of a calcium oxide hopper; the rotor flow meter is arranged on the desalted water feeding pipeline at the top of the configuration tank; the radar liquid level meter is arranged on the preparation tank; the inlet end of the sampling tank is provided with a mass flow meter, the mass flow meter is connected with a sampling opening in the bottom of the preparation tank through a first alkali liquor pump, and the outlet end of the sampling tank is connected with a liquid return opening in the side wall of the preparation tank through a second alkali liquor pump; the inlet end of the storage tank is connected with a liquid conveying opening in the bottom of the configuration tank through a third alkali liquor pump.

Description

Technical Field

[0001] The utility model relates to the technical field of calcium hydroxide solution preparation equipment, in particular to a device capable of automatically controlling and measuring the concentration of calcium hydroxide solution. Background Art

[0002] Preparing a calcium hydroxide solution of a given concentration is an essential process in industries such as the petroleum industry, papermaking, power plant flue gas desulfurization, and fine chemical organic dehydrochlorination. Currently, the concentration of a calcium hydroxide solution can only be determined after preparation by notifying the laboratory for sampling and analysis. This can easily lead to inaccurate concentrations due to differences in sampling techniques and non-representative sampling, necessitating secondary sampling and retesting, impacting subsequent production processes. Utility Model Content

[0003] In response to the above technical problems, the utility model provides a device that can automatically control and measure the concentration of calcium hydroxide solution.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0005] A device capable of automatically controlling and measuring the concentration of a calcium hydroxide solution, comprising:

[0006] The configuration tank is equipped with a stirrer, and its top feed port is connected to the bottom discharge port of the calcium oxide hopper through a rotary valve;

[0007] The rotor flowmeter is installed on the desalted water supply pipe at the top of the configuration tank;

[0008] Radar level gauge, set on the configuration slot;

[0009] The sampling tank has a mass flow meter on its inlet end, which is connected to the bottom sampling port of the configuration tank through the first alkali solution pump, and its outlet end is connected to the liquid return port on the side wall of the configuration tank through the second alkali solution pump;

[0010] The storage tank has an inlet end connected to the bottom infusion port of the configuration tank through a third alkali liquid pump;

[0011] Among them, the signal output end of the mass flow meter is connected to the DCS control system.

[0012] An air hammer is provided on the side wall of the calcium oxide hopper.

[0013] The beneficial effects of the utility model are as follows: an air hammer and a rotary valve are arranged at the bottom of the calcium oxide hopper of the utility model, and the granular calcium oxide is added to the configuration tank by knocking with the air hammer and metering with the rotary valve, the desalted water is metered by the rotor flowmeter, added to the configuration tank with stirring and fully mixed with the calcium oxide to complete the solution configuration, the configured solution is transported by the first alkali liquid pump to a portion of the sample through the mass flowmeter into the sampling tank, the mass flowmeter converts the density into concentration through density measurement and uploads it to the DCS, when the concentration measured by the mass flowmeter is consistent with the process parameters of the DCS, the second alkali liquid pump after the sampling tank is used to pump the liquid in the sampling tank to the configuration tank, and the third alkali liquid pump in front of the configuration tank transports the liquid to the calcium hydroxide storage tank for transportation to the next process, if the concentration measured by the mass flowmeter is inconsistent with the process parameters of the DCS, the desalted water or solid calcium oxide is supplemented according to calculation, and the operation is repeated in the configuration tank until the concentration measured by the mass flowmeter is consistent with the process indicators and then transported to the calcium hydroxide solution storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 It is a schematic diagram of the utility model;

[0016] In the figure, 1-calcium oxide hopper, 2-air hammer, 3-rotary valve, 4-rotameter, 5-radar level meter, 6-configuration tank, 7-first alkali solution pump, 8-mass flow meter, 9-sampling tank, 10-second alkali solution pump, 11-third alkali solution pump, 12-storage tank. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0018] like Figure 1As shown, a device for automatically controlling and measuring the concentration of calcium hydroxide solution includes: a configuration tank 6 with a built-in stirrer, and a top feed port thereof connected to a bottom discharge port of a calcium oxide hopper 1 through a rotary valve 3; a rotor flowmeter 4 arranged on a desalted water feeding pipe at the top of the configuration tank 6; a radar level meter 5 arranged on the configuration tank 6; a sampling tank 9, a mass flowmeter 8 provided on its inlet end, the mass flowmeter 8 being connected to the bottom sampling port of the configuration tank 6 through a first alkali solution pump 7, and the outlet end thereof being connected to a liquid return port on a side wall of the configuration tank 6 through a second alkali solution pump 10; a storage tank 12, the inlet end of which is connected to the bottom liquid infusion port of the configuration tank 6 through a third alkali solution pump 11; wherein, the signal output end of the mass flowmeter 8 is connected to a DCS control system, and an air hammer 2 is provided on the side wall of the calcium oxide hopper 1.

[0019] When the utility model is in use, when preparing calcium hydroxide solution, granular calcium oxide passes through the air hammer 2 and the rotary valve 3 installed on the discharge pipeline in the calcium oxide hopper 1, and the calcium oxide configured this time is accurately measured and added to the stirring configuration tank 6. The desalted water is measured by the rotor flowmeter 4 and added to the configuration tank 6. The central control starts stirring to configure the calcium hydroxide solution. After the configuration is completed, a part of the solution is pumped by the first alkali liquid pump 7 into the mass flowmeter 8 for measurement and enters the sampling tank 9. The mass flowmeter 8 measures the density of the suspension flowing through, converts it into a concentration and uploads it to the DCS. By comparing with the process indicators, if the indicators are qualified, the sample liquid is pumped to the configuration tank 6 by the second alkali liquid pump 10 and then transported to the calcium hydroxide solution storage tank 12 by the third alkali liquid pump 11 to complete the configuration of this calcium hydroxide solution. If they are not consistent, the sample liquid is pumped to the configuration tank 6 by the second alkali liquid pump 10. The central control personnel accurately analyze the amount of desalted water or calcium oxide added through the value of the radar level meter 5 for configuration. After the configuration is completed, the operation is repeated until it is qualified and the fixed concentration calcium hydroxide solution configuration is completed.

[0020] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A device for automatically controlling and measuring the concentration of calcium hydroxide solution, characterized in that: include: A configuration tank (6) is provided with a stirrer, and its top feed port is connected to the bottom discharge port of the calcium oxide hopper (1) via a rotary valve (3); A rotor flow meter (4) is provided on the desalted water supply pipe at the top of the configuration tank (6); A radar level gauge (5) is arranged on the configuration slot (6); A sampling tank (9) is provided with a mass flow meter (8) on its inlet end, the mass flow meter (8) is connected to the bottom sampling port of the configuration tank (6) through a first alkali liquid pump (7), and its outlet end is connected to the liquid return port on the side wall of the configuration tank (6) through a second alkali liquid pump (10); A storage tank (12), the inlet of which is connected to the bottom infusion port of the configuration tank (6) through a third alkali liquid pump (11); The signal output end of the mass flow meter (8) is connected to the DCS control system.

2. A device for automatically controlling and measuring the concentration of calcium hydroxide solution according to claim 1, characterized in that: An air hammer (2) is provided on the side wall of the calcium oxide hopper (1).

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