Flue gas desulfurization, dust removal and environment-friendly emission system for sintered brick tunnel kiln

Abstract

The utility model discloses a sintered brick tunnel kiln flue gas desulfurization and dust removal environment-friendly emission system which comprises a horizontal desulfurization flue, the horizontal desulfurization flue is composed of a totally-closed horizontal box body, the two ends of the horizontal desulfurization flue are provided with a gas inlet and a gas outlet respectively, and the gas inlet and the gas outlet are communicated with the horizontal box body. The inner bottom of the horizontal desulfurization flue is divided into six water tanks, namely a No.1 water tank, a No.2 water tank, a No.3 water tank, a No.4 water tank, a No.5 water tank and a No.6 water tank which are circuitously communicated by five partition plates along the advancing direction of flue gas, spraying devices are arranged above the No.1 water tank, the No.2 water tank, the No.3 water tank and the No.4 water tank, and an aeration device is arranged at the inner bottom of the No.5 water tank; a dosing tank and a drain valve are arranged on the sixth water tank, a circulating water pipe is communicated between the dosing tank and the spraying device, and a water adding pipe is arranged on the first water tank. According to the utility model, airflow is pressed by considering the characteristic of belt speed that hot gas moves upwards, a vertical desulfurization chamber I is changed into a horizontal type, and a plurality of spray water curtains are arranged, so that the flow velocity of flue gas is sufficiently delayed, a desulfurization liquid is sufficiently contacted and reacted with the flue gas, and the desulfurization and dust reduction effects are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel kiln brick production, in particular to an environmentally friendly emission system for flue gas desulfurization and dust removal of sintered brick tunnel kilns. Background Art

[0002] Tunnel kilns generate large amounts of flue gas during sintered brick production, significantly impacting the environment, primarily air pollution. However, infrastructure is essential to people's lives, and it relies on sintered bricks. Therefore, improving tunnel kiln flue gas emission standards is a top priority for brick factories.

[0003] Patent 201920004163.5 discloses a flue gas desulfurization and dust removal system for a sintered brick tunnel kiln, comprising a desulfurization tower, a wet dust collector, a second air supply pipe, a third air supply pipe, a first air supply pipe, and a blower. The flue gas desulfurization and dust removal system for a sintered brick tunnel kiln also includes a heat exchange and dehumidification system, which includes a water tank, a first heat exchange air duct, and a separation box. The air inlet of the first heat exchange air duct is connected to the air outlet of the first air supply pipe, and the air outlet is arranged at the lower part of the inner cavity of the separation box and faces downward. The air inlet of the second air supply pipe is arranged at the upper part of the inner cavity of the separation box, and the air outlet is connected to the air inlet of the desulfurization tower. This patented technology cleverly utilizes the heat of high-temperature flue gas, first passing the flue gas with a large amount of moisture into the heat exchange system for waste heat recovery and dehumidification, and then passing it into the desulfurization tower for desulfurization, thereby further improving the desulfurization and dust removal effect of the flue gas and effectively recovering the heat of the flue gas.

[0004] As is well known, tunnel kiln flue gas emissions have the following characteristics: first, high temperature and a large amount of waste heat; second, it contains harmful gases such as dust and sulfides. The aforementioned patent proposes flue gas heat recovery, but it only considers the problem from the perspective of flue gas emissions, and thus develops a feasible solution. While feasible, this solution is rather one-sided. Furthermore, the flue gas passes through the desulfurization tower quickly, resulting in incomplete desulfurization and substandard flue gas emissions. Utility Model Content

[0005] The purpose of this utility model is to overcome the above defects of the prior art and provide a sintered brick tunnel kiln flue gas desulfurization and dust removal environmentally friendly emission system, which aims to change the vertical desulfurization chamber into a horizontal one, and also set up several spray water curtains, thereby fully slowing down the flue gas flow rate, allowing the desulfurization liquid to fully contact and react with the flue gas, greatly improving the desulfurization and dust reduction effect.

[0006] To achieve the above object, the utility model is realized through the following technical solutions: A flue gas desulfurization, dust removal and environmental protection emission system for a sintered brick tunnel kiln, characterized in that it includes a horizontal desulfurization flue, the horizontal desulfurization flue is composed of a fully enclosed horizontal box body, and an air inlet and an exhaust port are respectively arranged at both ends of the horizontal desulfurization flue. The inner bottom of the horizontal desulfurization flue is divided into six pools, namely the first, second, third, fourth, fifth and sixth pools, which are connected in a circuitous manner by five partition plates along the direction of the flue gas flow. Among them, spray devices are arranged above the first, second, third and fourth pools, an aeration device is arranged at the inner bottom of the fifth pool, a chemical dosing tank and a drain valve are arranged on the sixth pool, a circulating water pipe is connected between the chemical dosing tank and the spray device, and a water supply pipe is arranged on the first pool.

[0007] The utility model suppresses the air flow by considering the belt speed characteristic that hot air rises upwards, changes the vertical desulfurization chamber to a horizontal one, and also arranges several spray water curtains, thereby fully delaying the flue gas flow rate, enabling the desulfurization liquid to fully contact and react with the flue gas, and greatly improving the desulfurization and dust removal effects.

[0008] Preferably, the spray device includes a main water supply pipe arranged along the width direction of the horizontal desulfurization flue, and two rows of front row spray heads and rear row spray heads arranged in parallel are arranged on the main water supply pipe.

[0009] The spray device forms two front and rear water curtains. Among them, the water source is the recycled water after adding chemicals, which contains alkaline desulfurizing agents, allowing the desulfurization liquid to fully contact the flue gas multiple times, greatly improving the desulfurization effect, and fully adsorbing sulfur dioxide, nitrogen dioxide and particulate matter in the flue gas to reach low emission standards.

[0010] Preferably, the aeration device includes an underwater blower that intakes air into the pool and then creates water surges.

[0011] The circulating water pool is added with an aeration device, and the desulfurized water is oxidized and decomposed by aeration to ensure the stability of the pH value, so that the horizontal desulfurization flue is in a high-efficiency desulfurization and dust removal state.

[0012] Preferably, a circulating booster pump and a water quality filter are additionally arranged in the pipeline of the circulating water pipe.

[0013] The circulating water needs to be sprayed, so a circulating booster pump is needed to pressurize it in order to better form a water curtain and prevent the flue gas from escaping. The water quality filter is mainly used to filter particulate matter in the water, thereby preventing the spray pipe from being blocked.

[0014] Preferably, a water quality test pool is also arranged on the sixth pool.

[0015] The water quality test pool is inside the sixth pool and is connected to the latter. It is mainly for safe discharge through the drain valve after the subsequent water quality test is qualified.

[0016] Beneficial effects: The utility model suppresses the air flow by considering the belt speed characteristic that hot air rises upwards, changes the vertical desulfurization chamber into a horizontal one, and also arranges several spray water curtains, thereby fully delaying the flue gas flow rate, enabling the desulfurization liquid to fully contact and react with the flue gas, and greatly improving the desulfurization and dust removal effects. Description of the Drawings

[0017] Figure 1 It is a side view of the structure of the desulfurization, dust removal and environmental protection emission system of the utility model;

[0018] Figure 2 It is a top view of the structure of the desulfurization, dust removal and environmental protection emission system of the utility model.

[0019] In the figure: 15 - horizontal desulfurization flue, 17 - air inlet, 18 - exhaust outlet, 19 - partition plate, 20 - circulating water pipe, 21 - drain valve, 22 - spray device, 23 - aeration device, 24 - chemical addition tank, 25 - water quality test tank, 26 - water addition pipe, 27 - water quality filter, 28 - circulating booster pump. Detailed Embodiments

[0020] In order to make the technical means, creative features and achieved purposes of the utility model easy to understand, the following further elaborates the utility model in combination with specific embodiments.

[0021] Embodiment: As Figure 1 and Figure 2 shown, a sintered brick tunnel kiln flue gas desulfurization, dust removal and environmental protection emission system includes a horizontal desulfurization flue 15, and the horizontal desulfurization flue 15 is composed of a fully enclosed horizontal box body. An air inlet 17 and an exhaust outlet 18 are respectively arranged at both ends of the horizontal desulfurization flue 15. The air inlet 17 is connected to the flue gas discharge pipe of the sintered brick tunnel kiln, and the exhaust outlet 18 is connected to a high-altitude emission smoke tower (subsequently purchased with existing technology).

[0022] The inner bottom of the horizontal desulfurization flue 15 is divided into six pools, namely the first, second, third, fourth, fifth and sixth pools, which are connected in a circuitous manner by five partition plates 19 along the flue gas traveling direction. Among them, spray devices 22 are arranged above the first, second, third and fourth pools. The spray device 22 includes a main water supply pipe arranged along the width direction of the horizontal desulfurization flue, and two rows of parallel front row spray heads and rear row spray heads are arranged on the main water supply pipe.

[0023] An aeration device 23 is arranged at the inner bottom of the fifth pool. The aeration device 23 includes a submersible blower that intakes air into the pool and then creates water surges.

[0024] A chemical addition tank 24, a water quality test tank 25 and a drain valve 21 are arranged on the sixth pool. A circulating water pipe 20 is connected between the chemical addition tank 24 and the spray device 22, and a water addition pipe 26 is arranged on the first pool.

[0025] A circulation booster pump 28 and a water quality filter 27 are additionally provided in the pipeline of the circulating water pipe 21.

[0026] Usage: The present utility model suppresses the air flow in consideration of the belt speed characteristic that hot air rises upward, changes the vertical desulfurization chamber into a horizontal one, and additionally arranges several spray water curtains, thereby fully delaying the flue gas flow rate, enabling the desulfurization liquid to fully contact and react with the flue gas, and greatly improving the desulfurization and dust removal effects.

Claims

1. An environmental protection emission system for flue gas desulfurization and dust removal in a sintered brick tunnel kiln, characterized in that, It includes a horizontal desulfurization flue, which is composed of a fully enclosed horizontal box body. An air inlet and an exhaust outlet are respectively arranged at both ends of the horizontal desulfurization flue. The inner bottom of the horizontal desulfurization flue is divided into six pools, namely Pool No. 1, Pool No. 2, Pool No. 3, Pool No. 4, Pool No. 5 and Pool No. 6, which are circuitously connected by five partition plates along the flue gas traveling direction. Spraying devices are arranged above Pool No. 1, Pool No. 2, Pool No. 3 and Pool No.

4. An aeration device is arranged at the inner bottom of Pool No.

5. A chemical dosing tank and a drain valve are arranged on Pool No.

6. A circulating water pipe is connected between the chemical dosing tank and the spraying device. A water supply pipe is arranged on Pool No.

1.

2. The flue gas desulfurization, dust removal and environmental protection emission system for a sintered brick tunnel kiln according to claim 1, characterized in that, The spraying device includes a main water supply pipe arranged along the width direction of the horizontal desulfurization flue. Two rows of front-row spray heads and rear-row spray heads arranged in parallel are arranged on the main water supply pipe.

3. The flue gas desulfurization, dust removal and environmental protection emission system for the sintered brick tunnel kiln according to claim 1, characterized in that, The aeration device includes a submersible blower that intakes air into the pool and then creates water surges.

4. The flue gas desulfurization, dust removal and environmental protection emission system for the sintered brick tunnel kiln according to claim 1, wherein, A circulating booster pump and a water quality filter are additionally arranged in the pipeline of the circulating water pipe.

5. The flue gas desulfurization, dust removal and environmental protection emission system for a sintered brick tunnel kiln according to claim 1, characterized in that, A water quality test pool is also arranged on Pool No. 6.

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