Background
NTP is a low-temperature plasma technology, low-temperature plasma is a fourth state outside solid, liquid and gas substances, and consists of positive ions, negative ions, electrons and neutral particles, the number of positive and negative charges in the system is the same, so the system is called plasma, and the application of the low-temperature plasma technology is the low-temperature plasma technology, and the existing method for purifying tail gas by using the NTP technology mainly comprises the following steps: jet injection discharge technology, direct contact discharge technology, and the like.
The injection type discharge technology is characterized in that an NTP plasma field is arranged beside a tail gas discharge pipe, the plasma field generates plasma under the high-voltage condition, the plasma is injected into the tail gas discharge pipe in an injection mode and performs various reactions with VOCs (volatile organic compounds) to be treated in the tail gas discharge pipe, the purpose of purifying the tail gas is achieved, and the following problems exist:
1) the half-life period of ROS (reactive oxygen species) in the plasma field is short, about 100ms to several minutes are unequal, and physical or chemical reaction is generated in the process that the ROS are injected into the tail gas exhaust pipe (far more than the half-life period), so that the oxidation performance of the ROS is reduced;
2) the amount of ROS generated by the injection reaction is not matched with the amount of VOCs to be treated in the tail gas exhaust pipe, and under the condition of not changing the existing process parameters, the amount of ROS generated by the injection reaction is usually only 1/10 of the amount of VOCs to be treated, so that the treatment capacity of the equipment is insufficient, and most VOCs are exhausted into the atmosphere without being treated.
3) The injection type can only be adopted because the positive electrode can not be completely sealed, so that the tail gas can not be in direct contact with the electrode.
The electrode of the direct contact type discharge technology is a needle type tubular electrode, when high voltage is applied, a plasma field is formed between a positive electrode and a negative electrode and plasma is generated, when tail gas to be treated passes through the plasma field, VOCs in the tail gas and ROS in the plasma field carry out various reactions, so that the tail gas is purified, but the direct contact type discharge technology has the following problems:
1) if the needle type tubular electrode needs to generate the same amount of ROS as the plate type electrode, the number and the size of the electrode are larger, so that the whole size of the equipment is increased, the occupied space is large, and the investment cost is high;
2) the needle type tubular electrode has poor stability, short service life, high frequency of electrode replacement, high maintenance cost and high later-stage equipment operation cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a discharge apparatus and tail gas clean-up processing system to improve tail gas treatment efficiency.
In order to solve the technical problem, the utility model provides a discharge device, include: a plurality of electrode plate groups, and the electrode plate groups include: a plurality of positive electrode plates and a plurality of negative electrode plates; all the positive electrode plates and all the negative electrode plates are parallel and are uniformly staggered; and the gap between the adjacent positive and negative electrode plates forms an air flow channel.
Further, the width of the airflow channel is 3-5 mm.
Further, the positive electrode plate includes: a first rectangular portion; the negative electrode plate includes: a second rectangular portion; and the area size of the second rectangular part is not smaller than that of the first rectangular part.
Further, the positive electrode plate includes: the electric conductor, the laminating is at the silica gel board of electric conductor surface to and the cladding is at the insulating material of silica gel board outside.
In another aspect, the present invention also provides a tail gas purification treatment system, including: a control cabinet, a transformer cabinet and an electrode cabinet; wherein the electrode cabinet is internally provided with the discharge equipment; the control cabinet is suitable for controlling the transformer cabinet to output power supply voltage required by the discharge equipment; and the discharge equipment is suitable for treating tail gas entering the electrode cabinet.
Further, the exhaust gas purification treatment system further comprises: a high temperature high humidity dust collector; the high-temperature high-humidity dust collector is suitable for pretreating tail gas entering the electrode cabinet.
Further, the exhaust gas purification treatment system further comprises: a current monitoring module; the current monitoring module is suitable for collecting current signals of each electrode plate group and sending the current signals to the control cabinet; and the control cabinet is suitable for disconnecting the power supply of the transformer and sending an alarm signal when the current signal is abnormal.
Further, the exhaust gas purification treatment system further comprises: a power supply monitoring module; the power supply monitoring module is suitable for acquiring parameter information of a power supply signal output by the transformer cabinet and sending the parameter information to the control cabinet; and the control cabinet is suitable for displaying the parameter information of the power supply signal, and disconnecting the power supply of the transformer and sending an alarm signal when the parameter information of the power supply signal is abnormal.
Further, the exhaust gas purification treatment system further comprises: an ozone monitoring module; the ozone monitoring module is suitable for collecting the ozone content of the treated tail gas and sending the ozone content to the control cabinet; and the control cabinet is suitable for controlling the transformer cabinet to adjust the output power supply voltage according to the ozone content.
The beneficial effects of the utility model are that, the discharge equipment and the tail gas purification treatment system of the utility model ensure enough discharge area through the positive and negative electrode plates in plate shape, and realize the generation of low-temperature plasma with high density in sufficient discharge area by setting up effective discharge gap, and ensure enough plasma quantity required by the comprehensive reaction with VOCs in the tail gas, thereby obtaining higher tail gas treatment efficiency; meanwhile, the positive electrode plate and the negative electrode plate in plate shapes can reduce the space size of the discharge equipment and reduce the input cost of the discharge equipment.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 1 to 3, the present embodiment 1 provides a discharge device including: a plurality of electrode plate groups, and the electrode plate groups include: a plurality of positive electrode plates 10 and a plurality of negative electrode plates 20; the positive electrode plates 10 and the negative electrode plates 20 are arranged in parallel and evenly in a staggered manner; and an air flow channel 30 formed by a gap between adjacent positive and negative electrode plates, and the width of the air flow channel 30 is 3-5 mm.
Specifically, after a high-voltage variable frequency power supply is applied between the positive electrode plate and the negative electrode plate, a discharge electric field is formed between the positive electrode plate and the negative electrode plate (namely in the air flow channel), low-temperature plasma (namely ROS) is generated when tail gas passes through the discharge electric field in the air flow channel, and the generated ROS reacts with the tail gas in the air flow channel, so that the aim of purifying the tail gas is fulfilled; the discharge equipment of the embodiment ensures enough discharge area through the positive and negative electrode plates in the plate shape, realizes the generation of high-density low-temperature plasma in the sufficient discharge area through the arrangement of the effective discharge gap, ensures enough plasma quantity required by the comprehensive reaction with VOCs in the tail gas, and thus obtains higher tail gas treatment efficiency; meanwhile, the positive electrode plate and the negative electrode plate in plate shapes can reduce the space size of the discharge equipment and reduce the input cost of the discharge equipment.
Specifically, the number of the electrode plate groups can be set according to the requirements of tail gas treatment capacity and the like, so that 100% of tail gas to be treated passes through each electrode plate group, and the tail gas treatment effect is ensured.
In this embodiment, the electrode cabinet adopts a movable drawer structure, so as to ensure quick and convenient maintenance.
In the present embodiment, the positive electrode plate 10 includes: a first rectangular portion 11; the negative electrode plate 20 includes: a second rectangular portion 21; and the size of the area of the second rectangular portion 21 is not smaller than the size of the area of the first rectangular portion 11.
Specifically, in the present embodiment, each positive electrode plate 10 has one negative electrode plate 20 on both sides, so that the number of negative electrode plates 20 in one electrode plate group is one more than the number of positive electrode plates 10; when the positive and negative electrode plates are electrified to form a discharge electric field, the area of the second rectangular part 21 is equal to or slightly larger than that of the first rectangular part 11, so that the boundary of the discharge electric field can not reach the components (such as a supporting frame for supporting the electrode plate group) outside the electrode plate group, and the electrical safety is improved.
In the present embodiment, the positive electrode plate 10 includes: the electric conductor, the laminating is at the silica gel board of electric conductor surface to and the cladding is at the insulating material of silica gel board outside.
Specifically, the conductive body is, for example, but not limited to, a stainless steel plate; such as, but not limited to, high borosilicate glass; the silicone plate and the electric conductor, and the silicone plate and the insulating material are bonded and sealed by the organic silicon adhesive.
Particularly, the silica gel plate and the insulating material ensure that the electric conductor has good insulating and sealing performance; the insulating sealing structure of the positive electrode plate ensures that no electrode short circuit occurs even if products such as condensate water exist in the tail gas to be treated, and avoids unstable conditions such as arc discharge, electrode damage and failure, thereby further ensuring the tail gas treatment effect.
Specifically, the negative electrode plate 20 and the positive electrode plate 10 have the same electric conductor, and in practical application, the negative electrode plate 20 does not need insulation sealing protection, and only needs to be insulated and isolated from the electrode cabinet, and the isolation mode adopts high-dielectric-constant ceramic blocks which are clamped and embedded at two ends of the negative electrode plate 20 to form a negative electrode plate support which is placed in the electrode cabinet.
Specifically, isolation and insulation protection are also arranged around the electrode cabinet, so that the safe operation of the whole system is ensured.
To sum up, the discharge apparatus of this embodiment 1 passes through the plate electrode of plate-type shape, can increase the discharge area, combines the clearance between the each plate electrode of control to produce enough quantity low temperature plasma, promoted tail gas treatment efficiency, and the plate electrode of plate-type shape can compress the space size of discharge apparatus, reduces discharge apparatus's input cost, and sets up the positive electrode plate into insulating seal structure, has improved the stability of electrode quality and life's permanence, and then has reduced discharge apparatus operation maintenance cost.
Example 2
As shown in fig. 4, based on embodiment 1, embodiment 2 provides an exhaust gas purification treatment system, including: a control cabinet 40, a transformer cabinet 50 and an electrode cabinet 60; wherein the electrode cabinet 60 is internally provided with a discharge device as described in embodiment 1; the control cabinet 40 is suitable for controlling the transformer cabinet 50 to output power supply voltage required by the discharge equipment; and the discharge equipment is suitable for treating tail gas entering the electrode cabinet.
Specifically, the control cabinet 40 is, for example and without limitation, a PLC control cabinet.
Specifically, a rectangular frame suitable for carrying each electrode plate group is arranged in the electrode cabinet 60, the rectangular frame is made of, for example, but not limited to, a mica sheet or similar insulating materials with certain hardness, and the rectangular frame with good insulating performance ensures that when the warm and humid exhaust gas is treated, a short circuit condition caused by certain moisture-containing performance of the exhaust gas is avoided.
Specifically, in this embodiment, the working voltage of the electrode cabinet 60 is 4000 to 100000 v, and the frequency covers 50Hz to 50000Hz alternating current.
In this embodiment, the exhaust gas purification treatment system further includes: a high temperature high humidity dust collector (not shown in the figure); the high temperature and high humidity dust collector is suitable for pretreating tail gas entering the electrode cabinet 60.
Specifically, the dust in the tail gas is removed through the high-temperature high-humidity dust collector, and the problems that after the tail gas enters the electrode cabinet, the dust is condensed on the electrode plate, partial discharge causes short circuit of a high-voltage power supply, and serious system shutdown and high operation and maintenance cost are caused are solved.
In this embodiment, the exhaust gas purification treatment system further includes: a current monitoring module; the current monitoring module is suitable for collecting current signals of all electrode plate groups and sending the current signals to the control cabinet 40; and the control cabinet 40 is suitable for disconnecting the power supply of the transformer in the transformer cabinet 50 and sending out an alarm signal when the current signal is abnormal.
Specifically, the fault of the electrode plate can be found in time by monitoring the current signal of each electrode plate group.
In this embodiment, the exhaust gas purification treatment system further includes: a power supply monitoring module; the power supply monitoring module is suitable for acquiring parameter information of a power supply signal output by the transformer cabinet 50 and sending the parameter information to the control cabinet 40; and the control cabinet 40 is suitable for displaying the parameter information of the power signal, and disconnecting the power supply of the transformer and sending out an alarm signal when the parameter information of the power signal is abnormal.
Specifically, the control cabinet 40 is adapted to display the parameter information of the power signal on a remote monitoring terminal; examples of the parameter information of the power signal include, but are not limited to: frequency, duty cycle, bus output voltage, current, operating state, etc.; the power supply monitoring module is convenient for the remote monitoring terminal to know the parameter information of the power supply signal in time, so that the remote regulation and control of the transformer cabinet are realized, and the power supply fault of the transformer cabinet 50 can be discovered in time.
In this embodiment, the exhaust gas purification treatment system further includes: an ozone monitoring module 70; the ozone monitoring module 70 is adapted to collect the ozone content of the treated tail gas and send the ozone content to the control cabinet 40; and the control cabinet 40 is suitable for controlling the transformer cabinet 50 to adjust the output power supply voltage according to the ozone content.
Specifically, the ozone content of the treated tail gas is monitored by the ozone monitoring module 70, so that the transformer cabinet 50 can adjust the output power voltage in time, and the efficient and energy-saving operation of the system is ensured.
In conclusion, the exhaust gas purification treatment system of this embodiment 2 can realize high-efficient processing to tail gas to in the course of the processing, in time discover abnormal conditions, in time adjust the system operation requirement through each monitoring module, guarantee the efficient even running of system.
All the components or parts selected in the application are general standard components or parts known by those skilled in the art, and the structure and principle of the components or parts can be known by technical manuals or by routine experiments.
In the description of the embodiments of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.