Quantitative alkali liquor injection device in wet-process alkali liquor deacidification system for waste incineration

Abstract

The utility model relates to a flue gas treatment system for waste incineration, in particular to an alkali liquor quantitative injection device in a wet-process alkali liquor deacidification system for waste incineration. The utility model aims to provide an alkali liquor quantitative injection device in a wet-process alkali liquor deacidification system for waste incineration, which can realize quantitative injection of alkali liquor, and is simple and reasonable in structure and stable and reliable in operation. According to the technical scheme, the alkali liquor quantitative injection device in the wet-process alkali liquor deacidification system for waste incineration is characterized by comprising a spray gun and a control assembly which are arranged on a circulating liquid pipeline; one end of the spray gun is mounted on the pipe wall of the circulating liquid pipeline and is communicated with an alkali liquor system through a control valve, and the other end of the spray gun is inserted into the circulating liquid pipeline to spray alkali liquor; the control assembly comprises a PH meter and a control valve; the PH meter is mounted on the circulating liquid pipeline and has a remote transmission signal; and the control valve is interlocked with the online PH meter through a data line.

Description

Technical Field

[0001] This utility model relates to a flue gas treatment system for waste incineration, specifically an alkaline liquid metering injection device in a wet alkaline deacidification system for waste incineration. Background Technology

[0002] CN221492012U discloses a flue gas deacidification treatment system, including: a deacidification tower, a circulating alkali pool, and a spray pump. A guide plate is fixedly installed at the bottom of the deacidification tower, and a gas dispersion structure is fixedly installed in the middle of the guide plate. The gas dispersion structure includes an air inlet vertical cylinder, with an air inlet horizontal pipe connected to the bottom end of the air inlet vertical cylinder. An umbrella-shaped gas dispersion hood is fixedly installed on the top of the air inlet vertical cylinder, and several interconnected exhaust branch pipes are fixedly installed on the side of the umbrella-shaped gas dispersion hood. A spray mechanism is fixedly installed in the upper part of the deacidification tower. The drawback of this system is that the spray mechanism cannot achieve quantitative spraying, thus affecting the flue gas deacidification effect and treatment efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned background technology and provide a quantitative alkaline injection device for a wet alkaline deacidification system for waste incineration. The quantitative alkaline injection device can realize quantitative alkaline injection and has a simple and reasonable structure and stable and reliable operation.

[0004] The technical solution provided by this utility model is:

[0005] A quantitative alkali injection device for a wet alkali deacidification system in waste incineration is characterized in that: the quantitative alkali injection device includes a spray gun and a control assembly installed on a circulating liquid pipeline; one end of the spray gun is installed on the pipe wall of the circulating liquid pipeline and connected to the alkali system through a control valve, and the other end is inserted into the circulating liquid pipeline to spray alkali; the control assembly includes a pH meter installed on the circulating liquid pipeline and equipped with a remote signal transmission function, and a control valve that interlocks the online pH meter via a data line.

[0006] A branch pipeline equipped with a branch flange is installed on the pipe wall of the circulating liquid pipeline. The delivery pipe with the control valve is connected to the branch pipeline through a connecting flange fixed at one end, and the other end is connected to the alkali system.

[0007] A spray gun positioning plate is fixed to one end of the spray gun. The spray gun positioning plate is located between the branch flange and the connecting flange and is clamped and fixed by the two flanges.

[0008] The other end of the spray gun inserted into the circulating liquid pipe is an angled opening at angle A, and the direction of the angled opening is the same as the direction of the circulating liquid flow, so that the alkali solution enters the circulating liquid pipe in the direction of the circulating liquid flow.

[0009] The angle A is at least 45 degrees.

[0010] The control valves include a check valve, a back pressure valve, and a regulating valve connected in sequence.

[0011] The nozzle axis of the spray gun is perpendicular to the circulating fluid pipeline.

[0012] The alkaline solution system includes an alkaline solution tank and a spray pump connected to the alkaline solution tank.

[0013] The beneficial effects of this utility model are:

[0014] This invention enables simple and effective control of the pH value of the circulating liquid by quantitatively adding alkali solution to the circulating liquid pipeline, while preventing the circulating liquid from entering the alkali solution pipeline; moreover, it has a simple and reasonable structure, is convenient and quick to manufacture, is economical in cost, and operates stably and reliably. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model.

[0016] The following are the labels in the diagram: 1. Regulating valve; 2. Back pressure valve; 3. Check valve; 4. Spray gun; 5. Circulating liquid pipeline; 6. pH meter; 7. Spray gun positioning plate; 8. Infusion pipe; 9. Alkali system. Detailed Implementation

[0017] The following description, in conjunction with the embodiments shown in the accompanying drawings, provides further details.

[0018] Figure 1 The shown alkaline liquid metering injection device in the wet alkaline liquid deacidification system for waste incineration is connected between the alkaline liquid system and the circulating liquid pipeline 5; the circulating liquid pipeline has branch pipes on its wall and branch flanges are installed on the branch pipes; the alkaline liquid system includes an alkaline liquid tank and a spray pump connected to the alkaline liquid tank; this is similar to existing alkaline liquid injection devices.

[0019] The improvement of this utility model is the addition of a spray gun 4 and a control component. The control component includes a pH meter 6 with remote signal transmission and a control valve; the pH meter is installed on the circulating liquid pipeline, and the pH meter is interlocked with the control valve via a data line (indicated by a double-dotted line in the figure), thereby realizing the control of the amount of alkali added.

[0020] A control valve is installed on the infusion pipe 8, and one end of the infusion pipe is provided with a connecting flange, while the other end is connected to the alkaline solution system; the connecting flange is matched and connected to the branch flange, thereby realizing the connection between the infusion pipe and the branch pipeline.

[0021] The control valves include a check valve 3, a back pressure valve 2, and a regulating valve 1, which are installed on the infusion pipe and connected in sequence, to prevent the alkaline solution entering the circulating fluid pipeline from flowing back.

[0022] One end of the spray gun is welded and fixed to a spray gun positioning plate 7. The spray gun positioning plate is compatible with the branch flange and is installed between the branch flange and the connecting flange. After the flange bolts are tightened, it is clamped by the two flanges, thereby fixing the spray gun. Gaskets can also be provided on the two planes of the spray gun positioning plate to improve the sealing performance of the flange fixing. The other end of the spray gun is inserted into the inner cavity of the circulating liquid pipeline (it is recommended that the axis of the spray gun barrel be arranged perpendicular to the axis of the circulating liquid pipeline). The nozzle of the spray gun at this end is cut into an angled opening at angle A. The angled opening is opposite to the flow direction of the circulating liquid and the orientation of the angled opening is the same as the flow direction of the circulating liquid, so that when the alkali solution enters the circulating liquid pipeline, it can flow in the direction of the circulating liquid.

[0023] The angle A is 45 degrees or greater than 45 degrees.

Claims

1. A quantitative alkali injection device for a wet alkali deacidification system used in waste incineration, characterized in that: The alkali quantitative spraying device includes a spray gun (4) installed on the circulating liquid pipeline and a control component; one end of the spray gun is installed on the wall of the circulating liquid pipeline (5) and connected to the alkali system (9) through a control valve, and the other end is inserted into the circulating liquid pipeline to spray alkali; the control component includes a pH meter (6) installed on the circulating liquid pipeline and equipped with a remote signal transmission, and a control valve for the online pH meter interlocked through a data line.

2. The alkali quantitative injection device in the wet alkali deacidification system for waste incineration according to claim 1, characterized in that: A branch pipe equipped with a branch flange is installed on the pipe wall of the circulating liquid pipe. The delivery pipe (8) with the control valve is connected to the branch pipe through a connecting flange fixed at one end, and the other end is connected to the alkaline solution system.

3. The alkali quantitative injection device in the wet alkali deacidification system for waste incineration according to claim 2, characterized in that: One end of the spray gun is fixed with a spray gun positioning plate (7), which is located between the branch flange and the connecting flange and is clamped and fixed by the two flanges.

4. The alkali quantitative injection device in the wet alkali deacidification system for waste incineration according to claim 3, characterized in that: The other end of the spray gun inserted into the circulating liquid pipe is an angled opening at angle A, and the direction of the angled opening is the same as the direction of the circulating liquid flow, so that the alkali solution enters the circulating liquid pipe in the direction of the circulating liquid flow.

5. The alkali quantitative injection device in the wet alkali deacidification system for waste incineration according to claim 4, characterized in that: The angle A is at least 45 degrees.

6. The alkali quantitative injection device in the wet alkali deacidification system for waste incineration according to claim 5, characterized in that: The control valves include a check valve (3), a back pressure valve (2), and a regulating valve (1) connected in sequence.

7. The alkali quantitative injection device in the wet alkali deacidification system for waste incineration according to claim 6, characterized in that: The nozzle axis of the spray gun is perpendicular to the circulating fluid pipeline.

8. The alkali metering injection device in the wet alkali deacidification system for waste incineration according to claim 7, characterized in that: The alkaline solution system includes an alkaline solution tank and a spray pump connected to the alkaline solution tank.

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