Dangerous waste rotary kiln incineration flue gas desulfurization treatment system
By introducing a calcium carbonate powder spraying system into the rotary kiln flue gas desulfurization system, the problem of insufficient liquid alkali spraying volume was solved, achieving more efficient flue gas desulfurization and cost reduction, reducing the amount of liquid alkali used and improving the desulfurization effect.
Patent Information
- Application Number
- CN202423088467.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-14
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-14
AI Technical Summary
In existing rotary kiln flue gas desulfurization systems, insufficient liquid alkali spraying leads to incomplete absorption of some flue gas, resulting in excessive levels of harmful substances. Furthermore, liquid alkali is costly and difficult to adjust effectively, especially when the concentration of sulfur-containing gases is high, resulting in poor desulfurization performance.
A calcium carbonate powder spraying system is adopted, which uses a Roots blower to provide high-pressure, high-speed airflow to transport calcium carbonate powder into the rotary kiln to neutralize the acidic gas. The powder is then evenly sprayed into the rotary kiln through a spraying pipe. The spraying volume and blower speed are adjusted in real time to reduce the amount of liquid alkali used and improve the desulfurization effect.
It significantly reduces liquid alkali consumption by 10%-15%, lowers production costs, improves desulfurization effect, and achieves lower operating costs and higher desulfurization efficiency.
Smart Images
Figure CN223570400U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of flue gas desulfurization technology, concretely is a dangerous waste rotary kiln incineration flue gas desulfurization treatment system. BACKGROUND
[0002] The rotary kiln is a kind of equipment that dangerous waste is heated and decomposed, and its principle is to process through the rotating kiln cylinder and high-temperature atmosphere condition.This technology has the characteristics of harmless, reduction and energy recovery of dangerous waste, and has been widely used in the treatment of dangerous waste in pharmaceutical, chemical and electroplating industries.
[0003] In the process of rotary kiln operation, the generated flue gas contains a large amount of harmful substances such as nitrogen oxides and sulfur dioxide. Therefore, waste gas treatment is needed, such as dry dust removal, wet dust removal, SCR denitration, SNCR denitration and other technologies to reduce the emission of pollutants.
[0004] When a large amount of sulfur-containing gas enters the desulfurization tower during the desulfurization process, the liquid alkali spray in the desulfurization tower may not be sufficient, causing part of the flue gas to fail to absorb harmful substances and enter the next process. Moreover, the purchase cost of liquid alkali is gradually increasing, and the existing wet desulfurization mainly relies on the spraying of high-concentration liquid alkali for desulfurization. If the concentration of sulfur-containing gas is too high, simple wet desulfurization cannot adjust the spraying amount in time and effectively, causing the flue gas detection to exceed the standard. Therefore, a dangerous waste rotary kiln incineration flue gas desulfurization treatment system is designed. UTILITY MODEL CONTENTS
[0005] In view of the defects or deficiencies of rotary kiln incineration flue gas desulfurization, the purpose of the utility model is to provide a dangerous waste rotary kiln incineration flue gas desulfurization treatment system, which can significantly reduce the consumption of liquid alkali, thereby reducing production cost, and has higher desulfurization effect and lower operating cost.
[0006] To achieve the above-mentioned utility model purposes, the utility model adopts the following technical solutions:
[0007] The utility model provides a kind of dangerous waste rotary kiln incineration flue gas desulfurization treatment system, it include: stone powder bunker, for placing calcium carbonate powder;Roots blower, the air outlet on the roots blower is connected with the air inlet on impeller feeder by first compressed gas pipeline, for providing original kinetic energy and generating high-pressure high-speed airflow;Impeller feeder, the impeller feeder is located at the bottom of stone powder bunker, and the discharge port on the bottom of stone powder bunker is connected with the feed inlet on impeller feeder, for receiving the calcium carbonate powder discharged from the stone powder bunker;Rotary kiln, the powder injection pipe on the rotary kiln is connected with the discharge port on impeller feeder by second compressed gas pipeline, for receiving the calcium carbonate powder discharged from the impeller feeder.
[0008] Preferably, a check valve is arranged on the second compressed gas pipeline.
[0009] Preferably, the Roots blower is provided with an inlet and an outlet, and the inlet and the outlet are both provided with a sound attenuation device, and a check valve is arranged behind the sound attenuation device of the outlet.
[0010] Preferably, the powder spraying pipe is made of 310 stainless steel.
[0011] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:
[0012] In the utility model, through increasing the powder spraying related structure, the sulfur-containing gas can be neutralized in advance, the problems of excessive flue gas detection and increased liquid alkali amount caused by a large amount of sulfur-containing gas reaching the liquid alkali spraying tower can be reduced, the powder spraying related structure can reduce the liquid alkali amount by 10%-15%, so that the utility model can significantly reduce the consumption of liquid alkali, thereby reducing the production cost, and has higher desulfurization effect and lower operation cost, and the practicality is strong. BRIEF DESCRIPTION OF DRAWINGS
[0013] The drawings constituting a part of the specification of the utility model are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.
[0014] Figure 1 It is the structure schematic view of the hazardous waste rotary kiln incineration flue gas desulfurization treatment system provided by the utility model.
[0015] In the drawings:
[0016] 100, stone powder bin;
[0017] 200, Roots blower;
[0018] 300, impeller feeder;
[0019] 400, rotary kiln;
[0020] 500, first compressed gas pipeline;
[0021] 600, second compressed gas pipeline.
[0022] 700, check valve. DETAILED DESCRIPTION
[0023] The utility model will be further described below in combination with the drawings and embodiments.
[0024] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0025] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.
[0026] As shown in Figure 1 A hazardous waste rotary kiln flue gas desulfurization treatment system, comprising:
[0027] A stone powder bin 100 for placing calcium carbonate powder;
[0028] A Roots blower 200, an air outlet on the Roots blower 200 is connected with an air inlet on the impeller feeder 300 through a first compressed gas pipeline 500, for providing original kinetic energy and generating high-pressure high-speed airflow, and the high-pressure high-speed airflow is delivered into the impeller feeder 300 through the first compressed gas pipeline 500;
[0029] The impeller feeder 300 is located at the bottom of the stone powder bin 100, and a discharge port on the bottom of the stone powder bin 100 is connected with a feeding port on the impeller feeder 300, for receiving the calcium carbonate powder discharged from the stone powder bin 100, the calcium carbonate powder placed in the stone powder bin 100 is discharged into the impeller feeder 300 through the discharge port, the impeller feeder 300 can be frequency-controlled in rotation speed, so as to control the amount of calcium carbonate powder entering the rotary kiln 400 according to flue gas data indexes, and achieve continuous and stable output of flue gas indexes;
[0030] The rotary kiln 400, a powder injection pipe on the rotary kiln 400 is connected with a discharge port on the impeller feeder 300 through a second compressed gas pipeline 600, for receiving the calcium carbonate powder discharged from the impeller feeder 300, the calcium carbonate powder in the impeller feeder 300 is discharged through the discharge port under high-pressure high-speed airflow and delivered into the rotary kiln 400 through the second compressed gas pipeline 600, in this process, the powder injection pipe on the rotary kiln 400 uniformly sprays the calcium carbonate powder into the rotary kiln 400 and fully neutralizes the acid gas under high-temperature conditions, so as to achieve the purpose of low-cost treatment of acid flue gas, and the powder injection pipe inside the rotary kiln 400 can be adjusted in angle according to actual conditions.
[0031] The second compressed gas pipeline 600 is provided with a check valve 700, so that the positive pressure gas in the rotary kiln can be prevented from entering the second compressed gas pipeline 600.
[0032] The inlet and outlet of the Roots blower 200 are provided with soundproof devices, and the check valve 700 is arranged behind the soundproof device of the outlet, so that the noise can be reduced, and the calcium carbonate powder can be prevented from entering the Roots blower 200 after shutdown, so that the internal corrosion of the Roots blower 200 is avoided.
[0033] The powder spraying pipe is made of 310 stainless steel, so that the powder spraying pipe can be prevented from being burnt by high temperature.
[0034] In use, the staff fills the calcium carbonate powder into the stone powder bin 100, the Roots blower 200 provides the original kinetic energy, the high pressure and high speed airflow is generated by the Roots blower 200 and is transported into the impeller feeder 300 through the first compressed gas pipeline 500, the calcium carbonate powder in the stone powder bin 100 is discharged into the impeller feeder 300 through the discharge port, the calcium carbonate powder in the impeller feeder 300 is discharged through the discharge port under the high pressure and high speed airflow and is transported into the rotary kiln 400 through the second compressed gas pipeline 600, in the process, the powder spraying pipe on the rotary kiln 400 uniformly sprays the calcium carbonate powder into the rotary kiln 400 and is fully neutralized with the acid gas under high temperature, so that the concentration of the sulfur compound is effectively reduced, the spraying amount, the rotating speed of the Roots blower and the like are adjusted by monitoring the reaction in the kiln and the flue gas emission in real time, so that the desulfurization effect is ensured to be in the best state, so that the sulfur-containing gas is neutralized in advance by increasing the powder spraying structure, the problems of the flue gas detection exceeding the standard and the liquid alkali consumption increasing caused by a large amount of sulfur-containing gas reaching the liquid alkali spraying tower are solved, the liquid alkali consumption is reduced by 10%-15% by increasing the powder spraying structure, so that the consumption of the liquid alkali is significantly reduced, the production cost is reduced, and the desulfurization effect is higher and the operation cost is lower.
[0035] The preferred embodiments of the utility model are described above, and the utility model is not limited to the above. The utility model can be changed and varied in various ways for those skilled in the art. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A hazardous waste rotary kiln incineration flue gas desulfurization treatment system, characterized by, The application relates to a calcium carbonate production device, which comprises the following parts: a stone powder bin (100) for placing calcium carbonate powder; a Roots blower (200), an air outlet on the Roots blower (200) is connected with an air inlet on an impeller feeder (300) through a first compressed gas pipeline (500) for providing original kinetic energy and generating high-pressure high-speed airflow; the impeller feeder (300) is arranged at the bottom of the stone powder bin (100), and a discharge port on the bottom of the stone powder bin (100) is connected with a feeding port on the impeller feeder (300) for receiving the calcium carbonate powder discharged from the stone powder bin (100); a rotary kiln (400), a powder injection pipe on the rotary kiln (400) is connected with a discharge port on the impeller feeder (300) through a second compressed gas pipeline (600) for receiving the calcium carbonate powder discharged from the impeller feeder (300).
2. The hazardous waste rotary kiln incineration flue gas desulfurization treatment system according to claim 1, characterized in that: A check valve (700) is arranged on the second compressed gas pipeline (600).
3. The hazardous waste rotary kiln incineration flue gas desulfurization treatment system according to claim 1, characterized in that: Silencing devices are arranged on the air inlets and outlets of the Roots blower (200), and a check valve (700) is arranged behind the silencing device of the air outlet.
4. The hazardous waste rotary kiln incineration flue gas desulfurization treatment system according to claim 1, characterized in that: The powder injection pipe is made of 310 stainless steel.