Combined RTO ammonium salt cleaning device

Abstract

The utility model relates to the field of RTO (Regenerative Thermal Oxidation) equipment maintenance, in particular to a combined type RTO ammonium salt cleaning device which comprises an RTO heat accumulating type oxidizing furnace, compressed air nozzles are uniformly distributed at the height of more than 300mm away from heat accumulating ceramics at the bottom of the RTO heat accumulating type oxidizing furnace, double-fluid nozzles are arranged, and water and compressed air are arranged in a pipeline communicated with the double-fluid nozzles. And the double-fluid nozzle is a gas-liquid double-phase atomizing nozzle. The compressed air nozzle is located at the position 400 mm away from the bottom heat storage ceramic, and the double-fluid nozzle is located above or below the compressed air nozzle. And a water spraying device is arranged at the bottom of the RTO heat accumulating type oxidizing furnace and is communicated with the sewage draining exit through the lower cavity. Compared with the prior art, the device has the advantages that ammonium salt reactants can be removed and isolated to the maximum extent, and heat storage ceramic blockages can be cleaned in time. The time for shutdown cleaning due to ammonium salt blockage is shortened, the running stability of RTO equipment is improved, the maintenance cost is reduced, and the systematic cleaning problem caused by ammonium salt blockage is effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of RTO equipment maintenance, in particular to a combined device for cleaning RTO ammonium salt. Background Art

[0002] At present, a large amount of organic waste gas will appear in the production process of the pharmaceutical and chemical industry, which needs to be harmlessly treated by high-temperature oxidation. However, combined with the current treatment of the pharmaceutical and chemical industry by high-temperature oxidation, it is known that although the high-temperature oxidation method can treat high-concentration, multi-component waste gas in the pharmaceutical and chemical industry, the treatment process is complicated, and the components before and after the treatment react with each other to form organic or inorganic salts, resulting in blockage at the bottom of the RTO thermal storage ceramic, which seriously affects the continuous and stable operation of the RTO system. At present, there are corresponding measures to slow down or clean the system, but they are labor-intensive and time-consuming, and the operation is difficult. There is an urgent need for online and stable automatic cleaning measures to achieve continuous and stable operation of RTO and meet the dual goals of production stability and tail gas emission compliance.

[0003] The existing cleaning technology mainly involves spraying water on the thermal storage ceramics for cleaning after the RTO is shut down or turning on the RTO reverse handcuffing mode to increase the temperature of the thermal storage ceramics blocked at the bottom, thereby allowing the ammonium salt to vaporize and enter the back-end processing equipment.

[0004] Shutdown water spray cleaning will firstly increase the workload of maintenance personnel and the safety risks of working in confined spaces; secondly, when cleaning the RTO equipment, production also needs to be stopped simultaneously, which cannot meet the requirements of simultaneous operation of the generation equipment and environmental protection equipment; thirdly, when starting the RTO equipment again, a long time of baking is required to dry the heat storage ceramics, which increases a lot of energy consumption.

[0005] Although the anti-handcuffing measures can reduce the frequency of RTO shutdowns to a certain extent, when configuring the anti-handcuffing function, first, the anti-handcuffing temperature needs to be strictly controlled so that the structural support parts inside the RTO are within a safe and reliable range; second, the temperature rise rate needs to be strictly controlled during the anti-handcuffing process to prevent the organic liquid that may remain at the bottom of the RTO from evaporating rapidly and causing safety accidents; third, when the anti-handcuffing is completed, it takes a certain amount of time to correct the temperature of the bottom heat storage ceramic so that it operates within the normal temperature range.

[0006] Even though the above two technical means can deal with the existing ammonium salt blockage problem, they also face the problems of long cleaning cycle, difficult operation, high safety risk, high energy consumption and long recovery cycle. Utility Model Content

[0007] The utility model aims to overcome the deficiencies of the prior art and provide a combined RTO ammonium salt cleaning device to propose new combined RTO cleaning measures, automatically clean and exclude online, and achieve the purpose of immediate cleaning and exclusion and efficient anti-blocking.

[0008] In order to achieve the above purpose, a combined device for cleaning RTO ammonium salt is designed, including an RTO regenerative oxidation furnace,

[0009] Compressed air nozzles are evenly distributed at a height of more than 300mm from the heat storage ceramic at the bottom of the RTO regenerative thermal oxidation furnace;

[0010] A double-fluid nozzle is provided at a height of more than 300 mm from the heat storage ceramic at the bottom of the RTO regenerative thermal oxidation furnace, and water and compressed air are provided in a pipe connected to the double-fluid nozzle.

[0011] The two-fluid nozzle is a gas-liquid two-phase atomizing nozzle.

[0012] The compressed air nozzle is located at a height of 400 mm from the bottom thermal storage ceramic, and the dual-fluid nozzle is located above or below the compressed air nozzle.

[0013] A water spray device is provided at the bottom of the RTO regenerative thermal oxidation furnace, and the water spray device is connected to the sewage outlet through the RTO lower chamber.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The utility model sets different devices in different areas, and realizes the maximum removal and isolation of ammonium salt reactants through combined process means. The heat storage ceramic blockage can be cleaned in time, and the ammonium salt substances are cleaned out of the RTO device online and do not enter the RTO subsequent processing device. Therefore, in the project cases of pharmaceutical and chemical projects containing ammonium salt blockage, this solution can achieve continuous and stable operation of the RTO device, and greatly shorten the downtime for cleaning due to ammonium salt blockage, which is convenient for production enterprises to arrange production, improve the operating stability of RTO equipment, reduce maintenance costs, and effectively solve the systemic cleaning problems caused by ammonium salt blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 , a schematic diagram of the structure of the device of this application;

[0017] In the figure: 1. Compressed air nozzle; 2. Dual-fluid nozzle; 3. Water spray device; 4. Drain outlet; 5. Bottom heat storage ceramic; 6. RTO lower chamber. DETAILED DESCRIPTION

[0018] In order to make the purpose, principle and structure of the utility model clearer, it is further described below in conjunction with the drawings and specific embodiments.

[0019] The utility model provides a combined device for cleaning RTO ammonium salt, comprising an RTO regenerative oxidation furnace,

[0020] At a height of more than 5 300 mm from the heat storage ceramic at the bottom of the RTO regenerative thermal oxidation furnace, a compressed air nozzle 1 is evenly distributed;

[0021] A dual-fluid nozzle 2 is provided at a height of more than 300 mm from the heat storage ceramic 5 at the bottom of the RTO regenerative thermal oxidation furnace, and water and compressed air are provided in a pipe connected to the dual-fluid nozzle 2.

[0022] The two-fluid nozzle 2 is a gas-liquid two-phase atomizing nozzle.

[0023] The compressed air nozzle 1 is located at a height of 400 mm from the bottom heat storage ceramic 5, and the dual-fluid nozzle 2 is located above or below the compressed air nozzle 1.

[0024] A water spray device 3 is provided at the bottom of the RTO regenerative thermal oxidation furnace, and the water spray device is connected to the sewage outlet 4 through the RTO lower chamber 6.

[0025] The specific implementation measures are:

[0026] At a height of 5 400mm from the bottom heat storage ceramic, the compressed air is uniformly distributed to force the cleaning nozzle 1. That is, when the RTO starts to blow after the air intake is completed, the compressed air cleaning nozzle 1 is opened at the same time, and the high pressure of the compressed air and the large coverage of the nozzle are used to clean the residual waste gas at the bottom, and the dead zone that cannot be completely cleaned by the existing method is completely cleaned, and the ammonia gas, one of the reactants in the production of ammonium salts, is completely removed.

[0027] The same operation as above, when the RTO exhaust is completed, the above device is also used for forced cleaning, so that the other reactant hydrogen chloride in the production of ammonium salt is completely removed.

[0028] In order to further ensure that the system can operate safely and continuously stably, a dual-fluid nozzle 2, i.e., water + compressed air, is configured at the above-mentioned height. When the pressure loss of the bottom thermal storage ceramic 5 reaches a certain value, the device is turned on to clean the bottom thermal storage ceramic 5 online when the RTO is exhausted. The dual-fluid nozzle device 2 can use a very small amount of water to moisturize the thermal storage ceramic blocked by the bottom ammonium salt, so that the adhesion of the ammonium salt decreases, and combined with the forced purge of the compressed air nozzle 1, the ammonium salt blocked in the bottom thermal storage ceramic 5 falls off to the bottom of the RTO. Since the spray volume is extremely small, there is no need for temperature raising and baking measures to ensure the timely drying of the bottom thermal storage ceramic.

[0029] In order to completely clean out the ammonium salt substances cleaned out of the RTO from the bottom heat storage ceramic 5, a water spray device 3 is set at the lower end of the bottom heat storage ceramic 5 to clean the lower chamber of the RTO. The cleaned substances enter the RTO bottom drain port 4 through the RTO lower chamber 6 and are discharged to realize automatic control.

[0030] The above is only a specific implementation method of this utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical solution and new concept of the utility model, shall be covered by the protection scope of the utility model.

Claims

1. A combined device for cleaning RTO ammonium salt, comprising an RTO regenerative oxidation furnace, characterized in that Compressed air nozzles are evenly distributed at a height of more than 300mm from the heat storage ceramic at the bottom of the RTO regenerative thermal oxidation furnace; A double-fluid nozzle is provided at a height of more than 300 mm from the heat storage ceramic at the bottom of the RTO regenerative thermal oxidation furnace, and water and compressed air are provided in a pipe connected to the double-fluid nozzle.

2. A combined RTO ammonium salt cleaning device as claimed in claim 1, characterized in that The two-fluid nozzle is a gas-liquid two-phase atomizing nozzle.

3. A combined RTO ammonium salt cleaning device as claimed in claim 1, characterized in that The compressed air nozzle is located at a height of 400 mm from the bottom thermal storage ceramic, and the dual-fluid nozzle is located above or below the compressed air nozzle.

4. A combined RTO ammonium salt cleaning device as claimed in claim 1, characterized in that A water spray device is provided at the bottom of the RTO regenerative thermal oxidation furnace, and the water spray device is connected to the sewage outlet through the RTO lower chamber.

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