CN217939547U

CN217939547U - Flue gas treatment device for low-temperature cracking furnace

Info

Publication number: CN217939547U
Application number: CN202221612718.2U
Authority: CN
Inventors: 刘琨翔; 刘琨鹏; 赵学平; 黄世勇; 冯忠; 聂礼
Original assignee: Chongqing Puliter Laser Technology Co ltd
Current assignee: Chongqing Puliter Laser Technology Co ltd
Priority date: 2022-03-22
Filing date: 2022-06-24
Publication date: 2022-12-02
Anticipated expiration: 2032-06-24
Also published as: CN217909510U; CN217700626U; CN218424768U; CN217843870U; CN217665383U; CN217941337U; CN217964071U; CN217540760U; CN217816785U; CN217939628U

Abstract

The utility model provides a flue gas processing apparatus for low temperature cracking furnace, contain the flue gas main outlet with low temperature cracking furnace intercommunication, a dust remover for filtering from the flue gas main outlet exhaust flue gas particle piece's flue gas filter core and the poisonous and harmful substance separation in the gas that will pass through the flue gas filter core, the flue gas main outlet passes through the flue gas filter core and is connected with the dust remover, the flue gas filter core contains the low density filter layer that is close to the setting of the air inlet of flue gas filter core and the high density filter layer that is close to the setting of the gas vent of flue gas filter core. The bending design of the filter layer enables the smoke to pass through the filter layer under smaller pressure during filtering, thereby increasing the filtering effect and the filtering efficiency.

Description

Flue gas treatment device for low-temperature cracking furnace

Technical Field

The utility model relates to a refuse treatment technical field especially relates to a flue gas processing apparatus for low temperature cracking furnace.

Background

With the social development, the consciousness of environmental protection is deepened gradually. With the pursuit of environmental optimization, harmless garbage disposal becomes a trend in garbage disposal.

The waste generated by incineration or other treatment methods needs to be filtered or purified by the next stage before being discharged into the environment. For example, chinese patent No. CN211635646U relates to a negative pressure exhaust system for waste incineration, which includes an incineration boiler, a smoke exhaust pipe is fixedly connected to the incineration boiler, one end of the smoke exhaust pipe, which is far away from the incineration boiler, is connected to a bag-type dust collector, one side of the bag-type dust collector is provided with a suction fan, a purification pipe for communicating the bag-type dust collector and the suction fan is arranged between the bag-type dust collector and the suction fan, the purification pipe is spiral and is internally provided with an adsorbent. Or Chinese patent with the patent number CN214319680U, which comprises a deacidification tower for removing acid gas in the flue gas; the deacidification tower comprises a hollow tower body, a spray assembly is arranged above the tower body in the tower body, a conical ash hopper is arranged at the bottom of the tower body, and a slag outlet is formed in the bottom of the ash hopper; and a filtering grid matched with the inner diameter of the tower body is arranged in the tower body, and the filtering grid is close to the ash bucket and is positioned above the ash bucket. Before being discharged, the smoke needs to pass through different filter structures to remove large toxic and harmful particles or molecules which are carried by the smoke, and then the smoke is discharged to the environment.

The low-temperature cracking garbage disposal method is produced based on the purposes of low harmlessness and low environmental protection. The low-temperature cracking treatment technology is characterized in that the garbage is heated to the cracking temperature by one-time heating start, the gas after magnetization activation is introduced to improve the heat conduction efficiency, the thermochemical reaction is carried out, the household garbage starts the automatic decomposition process, the organic heat energy is released to provide continuous reaction conditions, water vapor and mineral substance ash are decomposed at the same time, and ash residues are discharged through an ash discharge port. The treatment method can effectively reduce the content of toxic substances in the discharged flue gas and waste materials, but the discharged flue gas and waste materials still need to be filtered and discharged.

Chinese patent with patent number CN110701617a discloses a domestic waste low temperature magnetization pyrolyzer, including inclosed schizolysis district, spray district and filtering area are located the schizolysis district top, the schizolysis district is the box structure, and from top to bottom be the drying space in proper order, low temperature schizolysis district and cold ash district, the top of drying space is provided with the feed inlet of symmetry, the drying space bottom is through supporting network and low temperature schizolysis district intercommunication, the drying space, be provided with the thermocouple in, one side of cold ash district is provided with the ash hole, the bottom of cold ash district is provided with the end of giving vent to anger and communicates to the admission valve of low temperature schizolysis district, both sides are provided with the water tank of taking the water pump in the schizolysis district. The smoke dust generated in the furnace enters the flue to be discharged after secondary spraying, so that the pollution to the environment is reduced. However, the spraying process can only take out larger particles of dust, and some small particles of debris cannot be removed, and the flow rate of the air flow in the dust can be reduced, resulting in reduction of the air flow screening.

The airflow filtering structure of the cracking furnace in the prior art mostly adopts a linear type single filtering sieve, so that the problem of strong pressure resisting airflow flowing when the airflow flows through the filtering sieve is caused, and the airflow filtering efficiency is reduced. Based on this, the utility model discloses based on normal operating device in order to realize the filterable purpose of high-efficient flue gas, design a flue gas processing apparatus for low temperature cracking furnace.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor studied a lot of documents and patents when making the present invention, but the space did not list all details and contents in detail, however, this is by no means the present invention does not possess these prior art features, but on the contrary the present invention has possessed all features of the prior art, and the applicant reserves the right to increase the related prior art in the background art.

SUMMERY OF THE UTILITY MODEL

To prior art, the application provides a flue gas processing apparatus for low temperature cracking stove, contain the flue gas main exit with low temperature cracking stove intercommunication, a dust remover for filtering the flue gas that crosses the particle piece in the flue gas main exit exhaust flue gas filter core and will pass through the poisonous and harmful substance separation in the gas of flue gas filter core, the flue gas main exit passes through the flue gas filter core and is connected with the dust remover, the flue gas filter core contains the low density filter layer that is close to the setting of the air inlet of flue gas filter core and the high density filter layer that is close to the setting of the gas vent of flue gas filter core, wherein, low density filter layer and high density filter layer set up the arc filter layer that the protruding curved surface deviates from the gas flow direction according to the mode that can cushion the air current that high-speed impact flue gas filter core in order to reduce the air current through low density filter layer and high density filter layer and the pressure that produces.

According to a preferred embodiment, the high-density filter layer is formed by a plurality of high-density filter sieves, each high-density filter sieve comprises a partition plate and a high-density filter material, the two ends of each partition plate abut against the side wall of the smoke filter core to form a sealed space, and the high-density filter material is filled between the partition plates, wherein the high-density filter material is not filled in the sealed space formed between the partition plates in a random dynamic change mode based on the action of the airflow.

According to a preferred embodiment, several high-density filter screens constitute the filter space of the high-density filter layer in such a way that they are spaced apart from each other forming high-density layer interspaces.

According to a preferred embodiment, the curvature of the plurality of high density filter screens increases from a direction closer to the low density filter layer to a direction further away from the low density filter layer.

According to a preferred embodiment, the partition is provided with air holes allowing the passage of the fumes, in such a way that the high-density filter material cannot pass through them.

According to a preferred embodiment, the low-density filter layer is filled with a low-density filter material having a diameter larger than that of the high-density filter layer.

According to a preferred embodiment, the partition is provided with air holes allowing the passage of the fumes in such a way as to make the high-density filtering material unable to pass through.

According to a preferred embodiment, the precipitator can comprise an adsorption structure for adsorbing tar against toxic and harmful substances other than solid particles.

According to a preferred embodiment, the cryogenic cracking furnace provided with the flue gas treatment device has a plurality of secondary flue gas outlets circumferentially arranged around the main flue gas outlet.

According to a preferred embodiment, the secondary flue gas outlet is communicated with the main flue gas outlet so that the flue gas flowing out of the secondary flue gas outlet can be converged with the flue gas flowing in the main flue gas outlet, and flows through the flue gas filter element and the dust remover in sequence after flowing out of the main flue gas outlet.

The utility model has the advantages that: the utility model relates to a flue gas treatment device for a low-temperature cracking furnace, which designs a flue gas auxiliary outlet circumferentially arranged around a flue gas main outlet in order to ensure the stability of the low-temperature environment in the furnace, thereby promoting the updating speed of the environment in the furnace by increasing the circulating speed and the volume of a pipeline, and ensuring the emission of flue gas influencing the cracking of substances in the furnace;

when the smoke is discharged to the outside, the utility model leads the smoke to be capable of separating the solid particles wrapped by the smoke and other toxic and harmful substances under the condition of relatively small pressure through the smoke filter core and the dust remover which are arranged at the air outlet of the smoke main outlet in sequence;

specifically, when the smoke passes through the smoke filter element, due to the low-density filter layer and the high-density filter layer which are arranged in a bending mode and used for removing particles with different pore diameters, the smoke can have a larger contact area with the filter layers compared with the filter layers in a straight line design, the pressure of the smoke acting on the filter layers in the flowing process is reduced, the flow velocity loss of the smoke in the flowing process is reduced, and therefore the filtering efficiency is improved.

Drawings

FIG. 1 is a schematic view of the filter element of the present invention;

FIG. 2 is a schematic view of the low temperature cracking furnace of the present invention.

List of reference numerals

100: a main flue gas outlet; 200: a secondary outlet for flue gas; 300: a flue gas filter element; 310: a low density filtration layer; 320: a high density filtration layer; 321: a high density filter screen; 322: a high density layer gap; 400: a feeding port; 500: an ash outlet; 600: a temperature-controlled heater; 700: an air inlet.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In the prior art, the gas filtration mode generally adopts modes such as rotary separation, filter element filtration or plasma irradiation, and the flue gas generated by the gas filtration mode can preferably adopt the filtration mode to intercept some larger fragment particles in the environmental protection or chemical industry. When the smoke is filtered by the filter element, pressure opposite to the moving direction is applied due to the problem of small pore size, so that the efficiency of the filtering process of separating the smoke from solid particles in the filter element is reduced.

Aiming at the prior art, the application provides a flue gas treatment device for a low-temperature cracking furnace, which comprises a flue gas main outlet 100 communicated with the low-temperature cracking furnace, a flue gas filter core 300 for filtering particle debris in flue gas discharged from the flue gas main outlet 100, and a dust remover for separating toxic and harmful substances in the gas passing through the flue gas filter core 300, wherein the flue gas main outlet 100 is connected with the dust remover through the flue gas filter core 300, the flue gas filter core 300 comprises a low-density filter layer 310 arranged close to an air inlet of the flue gas filter core 300 and a high-density filter layer 320 arranged close to an air outlet of the flue gas filter core 300, as shown in fig. 1, wherein the low-density filter layer 310 and the high-density filter layer 320 are arranged into arc-shaped filter layers with convex curved surfaces deviating from the gas flow direction in a mode of buffering air flow impacting the flue gas filter core 300 at high speed so as to reduce the pressure generated by the air flow passing through the low-density filter layer 310 and the high-density filter layer 320. By providing a curved filter layer to increase the area of the same flow stream contacting both the low density filter layer 310 and the high density filter layer 320, the pressure of the stream impinging on both the low density filter layer 310 and the high density filter layer 320 is reduced. Meanwhile, the concave curved surface facing the airflow flowing direction can provide buffer for the flowing speed of the airflow, and the pressure reduction generated by the impact of the airflow is avoided from reducing the flowing of the airflow in the smoke filter 300. The flue gas in the cryogenic cracking process will carry a part of ash particles or other debris into the flue gas filter 300, and the low-density filter layer 310 and the high-density filter layer 320 in the flue gas filter 300 can sequentially retain large particles or small particles in the flue gas in the low-density filter layer 310 and the high-density filter layer 320 based on their pore size designs. Preferably, the curvature of the low density filter layer 310 and the high density filter layer 320 can range between 0 to 180 °. The flue gas filter 300 includes a pipe, and two ends of the pipe are respectively connected to the main flue gas outlet 100 and the dust collector in a sealing manner. The flue gas flows into the flue gas main outlet 100 from the interior of the low-temperature cracking furnace, then sequentially passes through the low-density filter layer 310 and the high-density filter layer 320, and finally enters the dust remover. Preferably, the flue gas filter element 300 is provided with a suction pump between the air outlet connected with the dust remover and the high-density filter layer 320, so as to provide a power of unidirectional flow for the flowing flue gas.

According to a preferred embodiment, the high-density filter layer 320 is composed of a plurality of high-density filter sieves 321, and each high-density filter sieve 321 comprises a partition plate with two ends abutting against the side wall of the flue gas filter core 300 to form a sealed space and a high-density filter material filled between the partition plates, wherein the high-density filter material is unsaturated and filled in the sealed space formed between the partition plates in a manner capable of randomly and dynamically changing based on the action of the gas flow. In practice, the particle diameter of the filter material in the high-density filter layer 320 is too large, so that the filtering process becomes cleaner, but the pressure of the air flow passing through the filter material is higher, and the filtering efficiency is reduced. On the other hand, if the particle diameter of the filter material in the high-density filter layer 320 becomes smaller, the filtering efficiency is comparatively increased, but the filtering effect is reduced. On the one hand, the contact area between the airflow and the filtering material is increased through the bent filtering layer, on the other hand, due to unsaturated filling, the airflow does not directly act on the filling area and does not directly perform physical action on the filtering material when entering the high-density filtering sieve 321, so that the pressure of the airflow passing is reduced, and the passing efficiency of the airflow is increased under the condition of not reducing the filtering effect. Due to the unsaturated filling mode, the airflow forms different flow directions based on the filtering material which moves randomly when passing through, so that the flow path of the airflow in the filtering material is increased, and the rejection rate of impurities is increased.

According to a preferred embodiment, several high-density filter sieves 321 make up the filtering space of the high-density filter layer 320 in such a way that they are spaced apart from each other to form high-density layer gaps 322. Preferably, the high density filter material packing volume is different between the spaced high density filter screens 321, with the high density filter screens 321 closer to the low density filter layer 310 packing less volume of filter material than the high density filter screens 321 further from the low density filter layer 310. Because the smoke entering the high-density filter layer 320 at first carries more waste materials, a small amount of filter materials are used for screening, and more impurities are intercepted based on the gradual increase of the filter materials in the subsequent process, so that the quantity of the intercepted impurities of the filter materials is relatively kept balanced, and on one hand, the passing speed of the airflow at the air inlet of the high-density filter layer 320 is not reduced due to the over-thick high-density filter sieve 321 and the excessive impurities, and the filtering speed of the subsequent high-density filter sieve 321 is reduced; on the other hand, when the smoke filter 300 is replaced, the balanced impurity trapping can prevent the high-density filter sieve 321 at the air inlet of the high-density filter layer 320 from losing the effect and the high-density filter sieve 321 at the air outlet from having the working capacity.

According to a preferred embodiment, the curvature of the plurality of high density filter screens 321 increases from being closer to the low density filter layer 310 to being further from the low density filter layer 310. The subsequent high-density filter screen 321 has a gradually increasing thickness, and the curvature, or the contact area with the flue gas, is also gradually increased, thereby ensuring the filtering efficiency. Preferably, the increase in the curvature of the arc can be a gradient change.

According to a preferred embodiment, the partition is provided with air holes allowing the passage of the fumes, in such a way that the high-density filter material cannot pass through them. The clapboard is used for fixing the moving space of the filter material. The partition plates do not allow the filter particles to pass through under the driving of the smoke flow, and can only roll in a sealed space between the oppositely arranged partition plates.

According to a preferred embodiment, the low density filter layer 310 is filled with a lower density filter material having a larger diameter than the high density filter layer 320. Preferably, the filter material can be a silicon nitride ceramic ball, a zirconia ceramic ball, or a silicon carbide ceramic ball. Meanwhile, the particle size of the ceramic balls disposed in the low-density filter layer 310 needs to be larger than that of the high-density filter layer 320. For example, the low-density filter layer 310 may fill larger ceramic particles having a particle size of 1.5mm, and the high-density filter layer 320 may fill smaller ceramic particles having a pore size of 1.3mm.

According to a preferred embodiment, the precipitator can comprise an adsorption structure for adsorbing tar against toxic and harmful substances other than solid particles. The dust remover can also have two functions of plasma dust removal and ultraviolet disinfection. Preferably, the plasma dust removing structure can be the same as that of a vacuum plasma cleaning machine model PL-DW 150. The adsorption structure for adsorbing tar can be the same as that in the Chinese patent with the patent number of CN 206570277U. The ultraviolet disinfection is carried out by gas disinfection by adopting an ultraviolet lamp irradiation mode of UV-A.

According to a preferred embodiment, the cryogenic cracking furnace provided with flue gas treatment means has a plurality of secondary flue gas outlets 200, the plurality of secondary flue gas outlets 200 being circumferentially arranged around the main flue gas outlet 100. The low-temperature cracking furnace can exhaust gas efficiently through the exhaust pipelines uniformly arranged at the top of the low-temperature cracking furnace.

According to a preferred embodiment, the secondary flue gas outlet 200 is in communication with the main flue gas outlet 100 so that the flue gas flowing out of the secondary flue gas outlet 200 can be merged with the flue gas flowing in the main flue gas outlet 100 and then flows out of the main flue gas outlet 100 through the flue gas filter 300 and the dust collector in sequence. In order to purify all the gases generated in the low-temperature cracking furnace, the secondary flue gas outlet 200 and the main flue gas outlet 100 form a communicated pipeline and are connected with the flue gas filter core 300, so that all the flowing flue gas passes through the flue gas filter core 300 and the dust remover and then is discharged.

The cryogenic cracking furnace referred to in this application further comprises a feed inlet 400 for adding waste to be treated to the cryogenic cracking furnace, an ash outlet 500 for discharging treated waste, an air inlet 700 for providing ambient air to the internal environment of the cryogenic cracking furnace, and a temperature controlled heater 600 for passing a heat source for waste treatment, as shown in fig. 2. The feeding port 400 is arranged on the side surface of the low-temperature cracking furnace close to the top. The main flue gas outlet 100 and the auxiliary flue gas outlet 200 are arranged at the top of the low-temperature cracking furnace, and the gas inlet 700 is arranged at the bottom of the low-temperature cracking furnace. The garbage comprises three states in the low-temperature cracking furnace, namely a compaction layer containing untreated garbage and positioned at the uppermost layer in the equipment; a reaction layer positioned at the middle part of the interior of the device and receiving the temperature of the temperature control heater 600 for decomposition; the tail ash layer which is positioned at the bottom of the interior of the equipment and has been processed into tail ash is formed. Magnetized gas enters the low-temperature cracking furnace from the gas inlet 700, sequentially enters a tail ash layer, a reaction layer and a compaction layer in the low-temperature cracking furnace, and is discharged from the main flue gas outlet 100 and the auxiliary flue gas outlet 200 after participating in garbage treatment. The temperature-controlled heater 600 can provide a heat source for the equipment and ensure that the temperature in the low-temperature cracking furnace or the reaction layer is within 200 ℃. The garbage after reaction can be in a complete decomposition state and generally presents gray powder.

It should be noted that the above-mentioned embodiments are exemplary, and those skilled in the art can devise various solutions in light of the present disclosure, which are also within the scope of the present disclosure and fall within the scope of the present disclosure. Throughout this document, the features referred to as "preferably" are only an optional feature and should not be understood as necessarily requiring that such applicant reserves the right to disclaim or delete the associated preferred feature at any time. It should be understood by those skilled in the art that the present specification and drawings are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents. The present description contains several inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", all indicating that the respective paragraph discloses an independent concept, the applicant reserves the right to propose divisional applications according to each inventive concept. Throughout this document, the features referred to as "preferably" are only optional and should not be understood as necessarily requiring that such applicant reserves the right to disclaim or delete any relevant preferred feature at any time.

Claims

1. A flue gas treatment device for a low-temperature cracking furnace comprises a flue gas main outlet (100) communicated with the low-temperature cracking furnace, a flue gas filter core (300) used for filtering particle debris in flue gas exhausted from the flue gas main outlet (100), and a dust remover used for separating toxic and harmful substances in the gas passing through the flue gas filter core (300), wherein the flue gas main outlet (100) is connected with the dust remover through the flue gas filter core (300),

the flue gas filter element (300) comprises a low density filter layer (310) arranged close to the gas inlet of the flue gas filter element (300) and a high density filter layer (320) arranged close to the gas outlet of the flue gas filter element (300), wherein,

the low density filter layer (310) and the high density filter layer (320) are arc-shaped filter layers with convex curved surfaces deviating from the airflow direction in a mode of being capable of buffering airflow impacting the smoke filter core (300) at high speed so as to reduce pressure generated by the airflow passing through the low density filter layer (310) and the high density filter layer (320).

2. The flue gas treatment device according to claim 1, wherein the high-density filter layer (320) is composed of a plurality of high-density filter screens (321), the high-density filter screens (321) comprise partition plates having two ends abutting against the side walls of the flue gas filter core (300) to form a sealed space, and high-density filter materials filled between the partition plates, wherein the high-density filter materials are not filled in the sealed space formed between the partition plates in a manner capable of being randomly and dynamically changed based on the action of the gas flow.

3. The flue gas treatment device according to claim 2, wherein a number of the high density filter sieves (321) constitute a filter space of the high density filter layer (320) in such a way that they are spaced apart from each other forming high density layer gaps (322).

4. The flue gas treatment device according to claim 3, wherein the curvature of the arcs of the plurality of high-density filter screens (321) increases gradually from a direction close to the low-density filter layer (310) to a direction away from the low-density filter layer (310).

5. The flue gas treatment device according to claim 4, wherein the partition is provided with air holes for allowing flue gas to pass therethrough in such a manner that the high-density filter material cannot pass therethrough.

6. The flue gas treatment device according to claim 5, wherein the diameter of the low density filter material filled in the low density filter layer (310) is larger than the diameter of the high density filter material filled in the high density filter layer (320).

7. The flue gas treatment device according to claim 6, wherein the high density filter screens (321) have different filling volumes of high density filter material, wherein the high density filter screens (321) close to the low density filter layer (310) fill less volume of filter material than the high density filter screens (321) far from the low density filter layer (310).

8. The flue gas treatment device according to claim 7, wherein the dust separator is capable of containing an adsorption structure for adsorbing tar against toxic and harmful substances other than solid particles.

9. The flue gas treatment device according to claim 8, wherein the cryogenic cracking furnace provided with the flue gas treatment device has a plurality of secondary flue gas outlets (200), the plurality of secondary flue gas outlets (200) being circumferentially arranged around the main flue gas outlet (100).

10. The flue gas treatment device according to claim 9, wherein the secondary flue gas outlet (200) is in communication with the main flue gas outlet (100) so that flue gas flowing out of the secondary flue gas outlet (200) can be merged with flue gas flowing in the main flue gas outlet (100), and flows through the flue gas filter element (300) and the dust remover in sequence after flowing out of the main flue gas outlet (100).