A new method for measuring slurry density of wet desulfurization absorption tower

Abstract

A kind of new slurry density measurement method of wet desulfurization absorption tower. At present, in order to measure slurry density, special discharge pipeline is set, and slurry density is measured by discharging, which can cause slurry discharge pipeline blockage. The present application comprises a desulfurization absorption tower and a PH measuring tank, characterized in that: a slurry outlet pipe is connected to the slurry level of the desulfurization absorption tower, the slurry outlet pipe is connected to the bottom of the PH measuring tank, the upper side of the PH measuring tank is connected to a densimeter pipe, and the densimeter pipe is connected to the oxidation air pipe in the desulfurization absorption tower. The present application is used for measuring the slurry density of new absorption tower in wet desulfurization.

Description

Technical Field

[0001] This invention relates to a method for measuring the density of slurry in a novel wet desulfurization absorption tower. Background Technology

[0003] Studies have shown that SO2 mainly originates from the combustion of sulfur-containing coal and is the most toxic component in flue gas. It 1) irritates the respiratory tract; 2) forms acid mist in the air, which is more irritating than acid rain, and sulfuric acid mist is about 10 times more irritating than sulfur dioxide; 3) has a carcinogenic effect and can inhibit, destroy, or activate the activity of certain enzymes, disrupting sugar and protein metabolism and thus affecting the body's growth and development. Given the national requirements for further raising flue gas emission standards and the high importance placed on SO2 control, desulfurization of new power units and the retrofitting of older units are inevitable trends.

[0004] Wet desulfurization is an ideal device that uses alkaline solutions such as limestone to absorb SO2 in flue gas.

[0005] The main process flow of wet desulfurization is as follows: flue gas passes through the absorption tower in the wet desulfurization process, enters the spray area through the tray, and the slurry sprayed from the nozzles of the spray layer comes into full contact with the flue gas. The alkaline solution reacts with the acidic SO2 gas, reducing the SO2 content in the flue gas after the reaction. The reaction products fall into the slurry pool of the absorption tower. Finally, they are discharged into the gypsum dewatering system through the gypsum discharge pump.

[0006] During system operation, density is a crucial indicator for controlling when to dewater the slurry in the desulfurization system. When the slurry density exceeds 1180, operators need to dewater it. Therefore, the slurry density in the absorption tower is an important operational parameter. Currently, slurry density is measured by setting up a dedicated external discharge pipe. This method can lead to blockage of the external discharge pipe and cause some slurry to overflow during the measurement process, making it difficult to maintain hygiene on site. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned technical problems and provide a novel method for measuring the slurry density of a wet desulfurization absorption tower.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A novel method for measuring the density of slurry in a wet desulfurization absorption tower, comprising the following steps: (1) By setting up a pH measuring tank, the highest point of the pH measuring tank is lower than the liquid level of the absorption tower; (2) The slurry in the absorption tower flows to the pH measuring tank through the slurry outlet pipe, and then flows to the oxidation air pipe through the density meter pipe; (3) The positive pressure generated by the oxidation air in the oxidation air pipe will re-inject the slurry into the desulfurization absorption tower to form the slurry gravity flow, realize online real-time monitoring of the density value of the absorption tower slurry, and ensure the safe and stable operation of the system.

[0009] The method for measuring the density of slurry in a novel wet desulfurization absorption tower involves connecting a slurry outlet pipe below the slurry level in the desulfurization absorption tower. The slurry outlet pipe is connected to the bottom of a pH measuring tank, and the upper side of the pH measuring tank is connected to a densitometer pipe. The densitometer pipe is connected to an oxidation air pipe inside the desulfurization absorption tower.

[0010] The method for measuring the slurry density of a novel wet desulfurization absorption tower includes a pH measuring tank with at least one pH meter installed on its top.

[0011] The method for measuring the density of slurry in a novel wet desulfurization absorption tower is described above, wherein a density meter and valve are installed on the slurry outlet pipe. Beneficial effects

[0012] 1. This invention sets up a pH measuring tank. The slurry in the absorption tower flows into the pH measuring tank through the slurry outlet pipe, and then flows into the oxidation air pipe through the density meter pipe. The positive pressure formed by the oxidation air in the oxidation air pipe sprays the slurry back into the desulfurization absorption tower to form a gravity flow of slurry. This enables online real-time monitoring of the density value of the absorption tower slurry and ensures the safe and stable operation of the system.

[0013] 2. This invention enables the self-circulation of the absorber slurry while simultaneously measuring the slurry density, without increasing the discharge of slurry. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; In the diagram: 1. Desulfurization absorption tower; 2. Oxidation air pipe; 3. Density meter pipe; 4. pH meter measuring instrument; 5. Density meter instrument; 6. Valve; 7. Slurry outlet pipe; 8. pH measuring tank. Detailed Implementation

[0015] See Figure 1 A novel method for measuring the density of slurry in a wet desulfurization absorption tower, comprising the following steps: (1) By setting up a pH measuring tank, the highest point of the pH measuring tank is lower than the liquid level of the absorption tower; (2) The slurry in the absorption tower flows to the pH measuring tank through the slurry outlet pipe, and then flows to the oxidation air pipe through the density meter pipe; (3) The positive pressure generated by the oxidation air in the oxidation air pipe will re-inject the slurry into the desulfurization absorption tower to form the slurry gravity flow, realize online real-time monitoring of the density value of the absorption tower slurry, and ensure the safe and stable operation of the system.

[0016] A novel wet desulfurization absorption tower slurry density measurement method comprises: a desulfurization absorption tower 1 and a pH measuring tank 8, a slurry outlet pipe 7 connected below the slurry level in the desulfurization absorption tower, the slurry outlet pipe being connected to the bottom of the pH measuring tank, a densitometer pipe 3 connected to the upper side of the pH measuring tank, and the densitometer pipe being connected to the oxidation air pipe 2 inside the desulfurization absorption tower.

[0017] At least one pH meter 4 is installed on the top of the pH measuring tank.

[0018] The slurry outlet pipe is equipped with a density meter 5 and a valve 6.

[0019] By installing a pH measuring tank, with its highest point lower than the liquid level in the absorption tower and its location close to the ground, the system ensures that the slurry in the absorption tower flows through the slurry outlet pipe into the pH measuring tank, and then through the density meter pipe into the oxidation air pipe. The positive pressure generated by the oxidation air in the oxidation air pipe forces the slurry back into the desulfurization absorption tower, creating a gravity flow. This allows for real-time online monitoring of the slurry density in the absorption tower, ensuring the safe and stable operation of the system.

Claims

1. A novel method for measuring the density of slurry in a wet desulfurization absorption tower, characterized by: The method includes the following steps: (1) By setting up a pH measuring tank, the highest point of the pH measuring tank is lower than the liquid level of the absorption tower; (2) The slurry in the absorption tower flows to the pH measuring tank through the slurry outlet pipe, and then flows to the oxidation air pipe through the density meter pipe; (3) The positive pressure generated by the oxidation air in the oxidation air pipe will re-inject the slurry into the desulfurization absorption tower to form the slurry gravity flow, realize online real-time monitoring of the density value of the absorption tower slurry, and ensure the safe and stable operation of the system.

2. The method for measuring the slurry density of a novel wet desulfurization absorption tower according to claim 1, characterized in that: in The slurry outlet pipe is connected below the slurry level of the desulfurization absorption tower. The slurry outlet pipe is connected to the bottom of the pH measuring tank. The upper side of the pH measuring tank is connected to the densitometer pipe. The densitometer pipe is connected to the oxidation air pipe inside the desulfurization absorption tower.

3. The method for measuring the slurry density of a novel wet desulfurization absorption tower according to claim 2, characterized in that: At least one pH meter is installed on the top of the pH measuring tank.

4. The method for measuring the slurry density of a novel wet desulfurization absorption tower according to claim 3, characterized in that: The slurry outlet pipe is equipped with a density meter and a valve.

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