Sulfonated electrostatic demister with high-tension porcelain bottle protection

Abstract

The utility model relates to a sulfonated electrostatic demister with high-tension porcelain bottle protection, which comprises an electrostatic demister body, an electrostatic demister high-tension porcelain bottle chamber is arranged in the electrostatic demister body, an output flow path is connected outside the electrostatic demister high-tension porcelain bottle chamber, and the output flow path is one or combination of a first flow path and a second flow path. The first flow path is sequentially connected with a first fan and a steam heater in series in the conveying direction of the first flow path. The flow path II is sequentially connected with a fan II and a third-stage sulfur trioxide cooler in series along the output direction of the flow path II. According to the electrostatic demister, hot air is continuously blown into the high-tension porcelain bottle chamber of the electrostatic demister, so that continuous positive pressure is applied to flue gas, and the flue gas is prevented from being adhered to the porcelain insulator to reduce the insulation effect, corrode and shorten the service life; moreover, through the arrangement of the flow path II, the waste heat utilization can be realized by utilizing the arrangement of the third-stage sulfur trioxide cooler, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sulfonation reaction, in particular to a sulfonation electrostatic demister with high-pressure porcelain bottle protection. Background Art

[0002] In the current mainstream sulfonation reaction, SO3 is used as the sulfonating agent to sulfonate organic materials such as alkylbenzenes, fatty alcohols, or fatty alcohol polyoxyethylene ethers to obtain the sulfonated material in the sulfonation reactor. The sulfonated material in the sulfonation reactor is separated into gas and liquid by a gas-liquid static separator, and the resulting gaseous material is the sulfonated tail gas. This sulfonated tail gas contains air and entrained substances such as SO2, SO3, and sulfates, which need to be treated before it can be discharged in compliance with emission standards. The current treatment process mainly involves passing the sulfonated tail gas through an electrostatic precipitator to remove most of the sulfate mist and SO3, and then passing it through an alkaline scrubber to remove SO2 before it can be discharged in compliance with emission standards.

[0003] High-voltage porcelain bottle chambers are placed on both sides of the electrostatic precipitator. One end of the high-voltage porcelain bottle is connected to a transformer for power supply, and the other end is connected to the metal suspension inside the electrostatic precipitator. Several internal collecting tubes are arranged vertically and parallel in a shell. A steel wire, serving as a corona electrode, is suspended from the center of each collecting tube, and the upper end of the steel wire is connected to the metal suspension. Sulfonated exhaust gas enters the electrostatic precipitator, where the electrostatic field strength is sufficient to accelerate the free electrons in the gas to a high-energy state. These high-energy electrons ionize the gas and generate negative electrons that migrate from the negative electrode to the positive electrode. These ions intercept and attach to particles entrained in the airflow, causing them to carry a large amount of negative charge and be affected by the strong electric field. These make the particles migrate to the positive electrode and gather on the tube wall, falling under the action of gravity. The tail gas from 14F1 mainly contains unconverted SO2 gas and a small amount of SO3 gas, which enters the alkaline washing tower filled with fillers from the bottom. Through countercurrent contact with the alkaline circulating liquid delivered by the 14P1 pump, the SO2 gas and SO3 gas are absorbed by the alkaline liquid, so that the tail gas discharged into the atmosphere meets the emission standards.

[0004] In order to ensure that the porcelain bottle is not damp and to prevent waste acid from accumulating on the electrode insulator, the pressure inside the porcelain bottle must be kept constant to form a positive pressure on the flue gas inside the electrostatic precipitator, preventing the flue gas from adhering to the insulating porcelain bottle, reducing the insulation effect, corroding and shortening the service life. Utility Model Content

[0005] The utility model aims to solve the problems in the prior art and provides a sulfonated electrostatic precipitator with high-pressure porcelain bottle protection. The specific technical solution is as follows:

[0006] A sulfonated electrostatic precipitator with high-pressure porcelain bottle protection includes an electrostatic precipitator body, wherein the electrostatic precipitator body has an electrostatic precipitator high-pressure porcelain bottle chamber, and the electrostatic precipitator high-pressure porcelain bottle chamber is connected to an output flow path, wherein the output flow path is one of flow path 1 and flow path 2, or a combination of the two.

[0007] The flow path 1 is connected in series with a fan 1 and a steam heater along its conveying direction;

[0008] The second flow path is sequentially connected in series with a second blower and a third-stage sulfur trioxide cooler along its output direction.

[0009] As a further technical solution of the present invention, when the output flow path is a combination of flow path 1 and flow path 2, the flow path 1 and flow path 2 are connected in series or in parallel.

[0010] As a further technical solution of the present invention, the output flow path is flow path one and flow path two connected in series, and the output end of flow path two is connected to flow path one.

[0011] As a further technical solution of the present invention, the output flow path is flow path one and flow path two connected in parallel, the output end of flow path one and the output end of flow path two are separately connected to the high-pressure porcelain bottle chamber of the electrostatic precipitator, and flow path one and flow path two are both unidirectional flow paths.

[0012] As a further technical solution of the present invention, the steam heater is provided with a steam inlet pipe and a steam condensate drain pipe.

[0013] As a further technical solution of the present invention, the bottom of the electrostatic precipitator body is connected to a tail gas inlet pipe, the top of the electrostatic precipitator body is connected to a tail gas outlet pipe, and the other end of the tail gas outlet pipe is connected to the alkali washing tower.

[0014] As a further technical solution of the present invention, a dedicated transformer for the electrostatic precipitator is installed on the electrostatic precipitator body, and the output end of the dedicated transformer for the electrostatic precipitator is electrically connected to the high-voltage porcelain bottle of the electrostatic precipitator.

[0015] The beneficial effects of the utility model are as follows:

[0016] In this application, hot air is continuously blown into the high-pressure porcelain bottle chamber of the electrostatic precipitator, thereby applying a continuous positive pressure to the flue gas to prevent the flue gas from adhering to the insulating porcelain bottle, reducing the insulation effect, corroding and shortening the service life;

[0017] Furthermore, by setting up the second flow path, the waste heat can be utilized by using the setting up of the third-stage sulfur trioxide cooler, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shows a schematic structural diagram of the electrostatic demister body;

[0019] Figure 2 Shows a schematic structural diagram of the combination of flow path 1 and the electrostatic demister body;

[0020] Figure 3 A schematic diagram showing the structure of the combination of flow path 2 and the electrostatic demister body is shown;

[0021] Figure 4 It shows a schematic structural diagram of flow path 1 and flow path 2 connected in series;

[0022] Figure 5 A schematic diagram of the structure in which flow path 1 and flow path 2 are connected in parallel is shown.

[0023] Legend:

[0024] 100. Electrostatic precipitator body; 110. Exhaust gas inlet pipe; 120. Exhaust gas outlet pipe; 130. Special transformer for electrostatic precipitator; 140. High-voltage porcelain bottle chamber for electrostatic precipitator; 200. Flow path one; 210. Fan one; 220. Steam heater; 221. Steam inlet pipe; 222. Steam condensate drain pipe; 300. Flow path two; 310. Fan two; 320. Third-stage sulfur trioxide cooler. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0026] Figure 1 shows a schematic structural diagram of an electrostatic precipitator body 100; Figure 1 The sulfonation electrostatic precipitator with high-pressure porcelain bottle protection includes an electrostatic precipitator body 100, the bottom of the electrostatic precipitator body 100 is connected to a tail gas inlet pipe 110, the top of the electrostatic precipitator body 100 is connected to a tail gas outlet pipe 120, and the other end of the tail gas outlet pipe 120 is connected to an alkali washing tower; the tail gas enters the electrostatic precipitator body 100 through the tail gas inlet pipe 110, and after being treated by the sulfonation reaction of the electrostatic precipitator body 100, it is discharged from the tail gas outlet pipe 120 into the alkali washing tower for subsequent treatment; a dedicated transformer 130 for the electrostatic precipitator is installed on the electrostatic precipitator body 100. The electrostatic precipitator body 100 contains an electrostatic precipitator high-voltage porcelain bottle chamber 140, and the output end of the electrostatic precipitator dedicated transformer 130 is electrically connected to the electrostatic precipitator high-voltage porcelain bottle chamber 140; the electrostatic precipitator dedicated transformer 130 is a power supply that can provide high voltage, which is used to output high voltage to the electrostatic precipitator, thereby generating a sufficiently strong electric field to charge the particulate matter; the electrostatic precipitator high-voltage porcelain bottle chamber 140 is to isolate the electrical connection between the high-voltage electrode and the ground to prevent current leakage or short circuit. The porcelain bottle, as an excellent insulating material, can withstand high voltage without conducting electricity, thereby ensuring the formation and maintenance of the electric field.

[0027] Figure 2 Schematic diagram showing the structure of the combination of flow path 1 200 and electrostatic precipitator body 100; Figure 2In the embodiment, the high-pressure porcelain bottle chamber 140 of the electrostatic precipitator is externally connected to an output flow path, which is flow path 200. A fan 210 and a steam heater 220 are sequentially connected in series along the output direction of flow path 200. The steam heater 220 is provided with a steam inlet pipe 221 and a steam condensate drain pipe 222. The fan 210 serves as a power source to make the air flow flow continuously on flow path 200. The output direction of the air flow is the high-pressure porcelain bottle chamber 140 of the electrostatic precipitator, and the steam heater 220 can heat the air flow flowing through flow path 200, so that the air flow blown into the high-pressure porcelain bottle chamber 140 of the electrostatic precipitator becomes hot air. The hot air is continuously blown into the high-pressure porcelain bottle chamber 140 of the electrostatic precipitator and applies a continuous positive pressure to the flue gas to prevent the flue gas from adhering to the insulating porcelain bottle, reducing the insulation effect, corroding and shortening the service life.

[0028] In another embodiment, Figure 3 It shows a schematic structural diagram of the combination of the second flow path 300 and the electrostatic precipitator body 100; Figure 3 In the embodiment, the output flow path of the electrostatic precipitator high-pressure porcelain bottle chamber 140 is the second flow path 300, and the second fan 310 and the third-stage sulfur trioxide cooler 320 are connected in series along the output direction of the second flow path 300; the second fan 310 is the power source of the air flow on the second flow path 300, so that the air flow on the second flow path 300 is continuously supplied, and the third-stage sulfur trioxide cooler 320 is an external heat source. In the original sulfonation process, the waste heat recycling value is not great and is processed in an emptying manner; however, the hot air discharged is It can fully meet the protection wind requirements for the high-pressure porcelain bottle chamber 140 of the electrostatic precipitator. Therefore, the waste heat of the third-stage sulfur trioxide cooler 320 is transferred to the second flow path 300 through the pipeline, and the 80°C hot air is used to maintain the positive pressure of the flue gas inside the electrostatic precipitator to prevent the flue gas from adhering to the insulating porcelain bottle, reducing the insulation effect, corroding and shortening the service life. In this way, the device can completely replace the flow path 1 200 during continuous production; the rated power of the protection fan is 3KW, and the protection air volume is about 1400m 3 / h; using this method to replace the average annual electricity saving of about 25,000KW; stopping the use of steam heaters can save about 270,000Kg of steam each year. Steam generators generally use softened water or ultrafiltered water, with a water production rate of about 85%, which is equivalent to saving about 320 tons of water per year.

[0029] In another embodiment, Figure 4A structural schematic diagram of flow path 1 200 and flow path 2 300 connected in series is shown; the output flow path is flow path 1 200 and flow path 2 300 connected in series, and the output end of flow path 2 300 is connected to flow path 1 200; in the initial state, the hot air in flow path 2 300 has not yet been produced, and at this time, the fan 1 210 and the steam heater 220 are both turned on to generate initial hot air for temporary use. When hot air is generated in flow path 2 300, the fan 1 210 and the steam heater 220 are turned off, and the waste heat recovery in flow path 2 300 is realized without affecting the continuous hot air to the high-pressure porcelain bottle chamber 140 of the electrostatic precipitator.

[0030] In another embodiment, Figure 5 Schematic diagram showing the structure of flow path 1 200 and flow path 2 300 connected in parallel; Figure 5 In the figure, the output flow path is flow path 1 200 and flow path 2 300 connected in parallel, and the output end of flow path 1 200 and the output end of flow path 2 300 are separately connected to the high-pressure porcelain bottle chamber 140 of the electrostatic precipitator, and flow path 1 200 and flow path 2 300 are both one-way flow paths; the one-way flow path here is generally realized by a one-way valve to avoid backflow and mutual interference between flow path 1 200 and flow path 2 300. At the same time, flow path 1 200 and flow path 2 300 are arranged in parallel, and they can still cooperate with each other to maintain continuous hot air output to the high-pressure porcelain bottle chamber 140 of the electrostatic precipitator, but the two do not interfere with each other.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A sulfonated electrostatic precipitator with high-voltage porcelain bottle protection, comprising an electrostatic precipitator body (100), characterized in that: The electrostatic precipitator body (100) has an electrostatic precipitator high-pressure porcelain bottle chamber (140) therein, and the electrostatic precipitator high-pressure porcelain bottle chamber (140) is externally connected to an output flow path, and the output flow path is one of flow path 1 (200) and flow path 2 (300) or a combination of the two; The flow path 1 (200) is sequentially connected in series with a fan 1 (210) and a steam heater (220) along its conveying direction; The second flow path (300) is sequentially connected in series with a second fan (310) and a third-stage sulfur trioxide cooler (320) along its output direction.

2. The sulfonated electrostatic precipitator with high-pressure porcelain bottle protection according to claim 1 is characterized in that: When the output flow path is a combination of flow path one (200) and flow path two (300), the flow path one (200) and flow path two (300) are connected in series or in parallel.

3. The sulfonated electrostatic precipitator with high-pressure porcelain bottle protection according to claim 2, characterized in that: The output flow path is flow path one (200) and flow path two (300) connected in series, and the output end of flow path two (300) is connected to flow path one (200).

4. The sulfonated electrostatic precipitator with high-pressure porcelain bottle protection according to claim 2, characterized in that: The output flow path is a parallel flow path 1 (200) and a flow path 2 (300), the output end of the flow path 1 (200) and the output end of the flow path 2 (300) are both independently connected to the electrostatic precipitator high-pressure porcelain bottle chamber (140), and the flow path 1 (200) and the flow path 2 (300) are both unidirectional flow paths.

5. The sulfonated electrostatic precipitator with high-pressure porcelain bottle protection according to claim 3 or 4, characterized in that: The steam heater (220) is provided with a steam inlet pipe (221) and a steam condensate water drain pipe (222).

6. The sulfonated electrostatic precipitator with high-pressure porcelain bottle protection according to claim 3 or 4, characterized in that: The bottom of the electrostatic precipitator body (100) is connected to a tail gas inlet pipe (110), the top of the electrostatic precipitator body (100) is connected to a tail gas outlet pipe (120), and the other end of the tail gas outlet pipe (120) is connected to an alkali washing tower.

7. The sulfonated electrostatic precipitator with high-pressure porcelain bottle protection according to claim 3 or 4, characterized in that: A dedicated electrostatic precipitator transformer (130) is installed on the electrostatic precipitator body (100), and an output end of the dedicated electrostatic precipitator transformer (130) is electrically connected to the electrostatic precipitator high-voltage porcelain bottle chamber (140).

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