Waste gas purification tower for low-rank coal pyrolysis

Abstract

The utility model relates to the technical field of waste gas treatment, and particularly discloses a waste gas purification tower for low-rank coal pyrolysis, which comprises a tower body, and a spraying assembly and a filtering assembly which are sequentially arranged in the tower body from top to bottom, a gas inlet pipe is arranged at the top of the tower body, and a communicating notch is formed in one side of the bottom of the tower body; the partition plate is arranged in the tower body and provided with a plurality of through holes in the circumferential direction, the filter barrels penetrate through the through holes and are detachably connected with the partition plate, the filter barrels are filled with the filler, the outer wall of each filter barrel is provided with an outer-layer filter screen in the circumferential direction, and the outer-layer filter screens are used for separating the filler and an inner cavity of the tower body; the problems that packing filled in a traditional waste gas purification tower is accumulated on a partition plate installed in a tower body, workers need to shovel out the packing in the process of replacing the packing every time, time and labor are wasted, and the overhaul and maintenance time of the tower body is prolonged are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of waste gas treatment, and particularly discloses a waste gas purification tower for low-rank coal pyrolysis. BACKGROUND

[0002] Low-rank coal is a kind of coal with long flame and smoke during combustion, and has low coalification degree and appears in gray black to black color. In the treatment process of low-rank coal, the pyrolysis process of low-rank coal is included, coal pyrolysis is a key step of coal conversion, and coal gasification, liquefaction, coking and combustion all need to pass through or occur in the pyrolysis process. Because low-rank coal itself is easy to produce flue gas and waste gas in the combustion process, the waste gas generated in the low-rank coal pyrolysis process needs to be purified and treated by the waste gas purification tower before being discharged.

[0003] The waste gas purification tower is used for purifying waste gas by building a baffle in the tower body, piling up fillers above the baffle, and installing a spraying structure in the tower body above the fillers. After the waste gas is introduced from the top of the tower body, the waste gas is mixed with the purification liquid sprayed by the spraying structure, the sewage generated by the spraying and the waste gas sprayed are both passed through the fillers, and the sewage is filtered and purified again by the fillers. The filtered sewage falls into the water storage tank at the bottom of the tower body, and the waste gas filtered and purified again is discharged through the gas outlet formed in the tower body below the baffle.

[0004] Although the existing waste gas purification tower can purify the waste gas generated in the low-rank coal pyrolysis process, the fillers need to be shoveled out by workers in the purification tower during the maintenance and replacement of the fillers, which is time-consuming and laborious and prolongs the maintenance time of the tower body.

[0005] Therefore, the application provides a waste gas purification tower for low-rank coal pyrolysis to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at solving the problem that the fillers filled in the traditional waste gas purification tower are piled up on the baffle installed in the tower body, the fillers need to be shoveled out by workers during the replacement of the fillers, which is time-consuming and laborious and prolongs the maintenance time of the tower body.

[0007] In order to achieve the above object, the basic scheme of the utility model provides a waste gas purification tower for low rank coal pyrolysis, including tower body, spray assembly and filter assembly which are sequentially arranged in the tower body from top to bottom, the tower body top is equipped with air inlet pipe, the tower body bottom side is opened with the communication notch, the filter assembly includes the baffle which is arranged in the tower body and is circumferentially opened with a plurality of through holes, a plurality of filter barrels which are passed through the through holes and are detachably connected with the baffle and the filler which is respectively filled in the filter barrel, the filter barrel outer wall is circumferentially equipped with the outer layer filter screen which separates the filler and the tower body inner chamber, the tower body one side below the baffle is equipped with the air outlet pipe.

[0008] Further, the filter barrel inner side is coaxially fixed with the isolation ring, the isolation ring outer wall and the filter barrel inner wall form the accommodation cavity for accommodating the filler, a plurality of inner layer filter screens are circumferentially arranged on the isolation ring.

[0009] Further, the filter barrel inner side is coaxially fixed with the isolation ring, the isolation ring outer wall and the filter barrel inner wall form the accommodation cavity for accommodating the filler, a plurality of inner layer filter screens are circumferentially arranged on the isolation ring.

[0010] Further, the filter barrel inner side is coaxially fixed with the isolation ring, the isolation ring outer wall and the filter barrel inner wall form the accommodation cavity for accommodating the filler, a plurality of inner layer filter screens are circumferentially arranged on the isolation ring.

[0011] Further, the filter barrel inner side is coaxially fixed with the isolation ring, the isolation ring outer wall and the filter barrel inner wall form the accommodation cavity for accommodating the filler, a plurality of inner layer filter screens are circumferentially arranged on the isolation ring.

[0012] Further, the filter barrel inner side is coaxially fixed with the isolation ring, the isolation ring outer wall and the filter barrel inner wall form the accommodation cavity for accommodating the filler, a plurality of inner layer filter screens are circumferentially arranged on the isolation ring.

[0013] Further, the filter barrel inner side is coaxially fixed with the isolation ring, the isolation ring outer wall and the filter barrel inner wall form the accommodation cavity for accommodating the filler, a plurality of inner layer filter screens are circumferentially arranged on the isolation ring.

[0014] The principle and effect of the scheme are:

[0015] 1、Compared with the prior art, the filler of the utility model is relatively independently installed, the filler filled in each filter barrel exists in a three-dimensional form, the contact area of the filler and the purification liquid and the waste gas is increased, the purification speed and effect are increased, and the relatively independent filter barrel liquid is convenient for maintenance, when the filler is replaced, only the filter barrel needs to be removed and the internal filler is poured, the problem that the filler filled in the traditional waste gas purification tower is accumulated on the baffle installed in the tower body, the filler needs to be shoveled out by the staff during the replacement process each time, time and effort are wasted, and the maintenance time of the tower body is prolonged.

[0016] 2. Compared with the prior art, in this utility model, after the exhaust gas from the pyrolysis of low-rank coal is introduced into the tower body, the exhaust gas first comes into contact with and is purified by the purification liquid sprayed from the nozzle, and then enters the packing inside the isolation ring for filtration and purification. The purified gas passes through the outer filter screen of the filter barrel and is discharged from the gas outlet pipe below the partition. The water flow formed by the purification liquid sprayed from the nozzle enters the packing at the top of the receiving chamber and the inner side of the isolation ring, and enters the packing through the inner filter screen inside the isolation ring to filter the impurities carried in the water flow.

[0017] 3. Compared with the prior art, in the process of unified maintenance, the annular scraper installed on the guide rod can be raised and lowered by pulling the pull rod. During the rising process, the impurities attached to the inner filter screen are scraped off through the top edge until the annular scraper is pulled out of the isolation ring for cleaning. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a waste gas purification tower for low-rank coal pyrolysis according to an embodiment of this application is shown.

[0020] Figure 2 A schematic diagram of a filter assembly for a waste gas purification tower for low-rank coal pyrolysis, according to an embodiment of this application, is shown.

[0021] Figure 3 A partial schematic diagram of a filter assembly for a waste gas purification tower for low-rank coal pyrolysis, according to an embodiment of this application, is shown. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0023] The reference numerals in the accompanying drawings include: tower body 1, air inlet pipe 2, support rod 3, water supply ring pipe 4, nozzle 5, baffle plate 6, outer filter screen 7, filter barrel 8, guide rod 9, tie rod 10, water spray hole 11, packing 12, annular scraper 13, and auxiliary water supply pipe 14.

[0024] A waste gas purification tower for low-rank coal pyrolysis, implementing, for example... Figure 1 As shown:

[0025] It includes a tower body 1, a spray assembly and a filter assembly installed sequentially from top to bottom inside the tower body 1. An air inlet pipe 2 is installed at the top of the tower body 1, and a connecting slot is opened on the right side of the bottom of the tower body 1, which connects to the circulating water tank outside.

[0026] The spray assembly includes a support rod 3 bolted to the tower body 1, a nozzle 5 bolted to the end of the support rod 3, and a main water supply pipe installed on the support rod 3 and connected to the nozzle 5. The nozzle 5 is coaxially installed inside the tower body 1, and a main water supply hole is opened on the right side of the tower body 1 for the main water supply pipe to pass through.

[0027] The filter assembly includes a partition 6 with several through holes, which is bolted to the inner wall of the tower body 1; filter barrels 8, which pass through the through holes and are connected to the partition 6 by bolts; and packing material 12, which is filled in the filter barrels 8. Figure 2 As shown, the partition 6 has three layers of through holes from the outside to the inside. Each layer has 12, 6 and 3 through holes respectively from the outside to the inside, and a filter barrel 8 is installed in each through hole.

[0028] In this embodiment, the outer wall of the filter barrel 8 has several through grooves circumferentially opened, and each through groove is equipped with an outer filter screen 7. The outer filter screen 7 separates the packing 12 from the inner cavity of the tower body 1. An isolation ring is also coaxially fixedly installed on the inner side of the filter barrel 8. A receiving chamber for accommodating the packing 12 is formed between the outer wall of the isolation ring and the inner wall of the filter barrel 8. The isolation ring also has several through grooves circumferentially opened, and each of these grooves is equipped with an inner filter screen. The inner filter screen separates the packing 12 from the inner cavity of the isolation ring.

[0029] Inside each filter barrel 8, a guide rod 9 is coaxially fixedly installed. A slip ring is fitted around each guide rod 9. A scraper that fits into the inner filter screen is integrally formed on the outside of the slip ring. In this embodiment, the scraper is an annular scraper 13. A pull rod 10 that fits into the guide rod 9 and extends out of the filter barrel 8 is welded to the top of the slip ring. The pull rod 10 does not completely cover the guide rod 9, and a protrusion is welded to the top of each pull rod 10. A groove is opened inward on the outer wall of each protrusion.

[0030] Furthermore, such as Figure 3 As shown, each guide rod 9 has a coaxially formed water supply groove, and each guide rod 9 has several circumferentially formed spray holes 11 that communicate with the water supply groove. A water supply structure is installed inside the tower body 1 to supply water to the guide rods 9. For example... Figure 2 As shown, the water supply structure includes three water supply ring pipes 4 arranged from the outside to the inside above the partition plate 6, with their diameters decreasing sequentially, and an auxiliary water supply pipe 14 installed above the three water supply ring pipes 4 and connected to all three water supply ring pipes 4. An auxiliary water supply hole is opened on the right side of the tower body 1 for the auxiliary water supply pipe 14 to pass through. Furthermore, the tie rod 10 can extend out from the water supply ring pipes 4.

[0031] And, in the present embodiment, the part of the main water supply pipe and the auxiliary water supply pipe 14 extending out of the tower body 1 is communicated, and both are supplied with the purification liquid by an external water pump.

[0032] The utility model discloses after the filter barrel 8 is loaded on the baffle 6 respectively, fills the filler 12 in the containing chamber, and installs the shower nozzle 5, can constitute the complete waste gas purification tower,

[0033] In use, first, the main water supply pipe and the auxiliary water supply pipe 14 are supplied with the purification liquid, the purification liquid is sprayed from the shower nozzle 5 and the water spraying hole 11 of the guide rod 9, and the liquid is formed under the tower body 1;

[0034] Then, the waste gas after low rank coal pyrolysis is introduced into the tower body 1, the waste gas is first contacted with the purification liquid sprayed from the shower nozzle 5 and purified, then enters the filler 12 inside the isolation ring, and is filtered and purified, and the purified gas passes through the outer layer filter screen 7 of the filter barrel 8 and is discharged from the gas outlet pipe below the baffle 6;

[0035] The water flow formed by the purification liquid sprayed from the shower nozzle 5 enters the filler 12 at the top of the containing chamber and inside the isolation ring, enters the filler 12 through the inner layer filter screen inside the isolation ring, and filters the impurities wrapped in the water flow;

[0036] And the purification liquid sprayed from the guide rod 9 inside the isolation ring can further play a purification role, and the sprayed water flow enters the filler 12 from the inner layer filter screen, and the inner layer filter screen can further play a filtering role and attach the filtered impurities on the inner layer filter screen;

[0037] During the unified maintenance, the annular scraper 13 installed on the guide rod 9 can be lifted up and down by pulling the pull rod 10, and the impurities attached on the inner layer filter screen are scraped off through the top edge during the lifting process, until the annular scraper 13 is pulled out of the isolation ring for cleaning, and a tool outside can also be used, for example, the pull rope is clamped in the clamping groove of the protrusion on the top of the pull rod 10, and a plurality of guide rods 9 can be pulled up at the same time;

[0038] Meanwhile, the filler 12 of the utility model is relatively independently installed, the filler 12 filled in each filter barrel 8 exists in a three-dimensional form, increases the contact area of the filler 12 with the purification liquid and the waste gas, increases the purification speed and effect, and the relatively independent filter barrel 8 is convenient for maintenance.

[0039] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A waste gas purification tower for low-rank coal pyrolysis, characterized in that, The system includes a tower body, a spray assembly and a filter assembly arranged sequentially from top to bottom inside the tower body. The top of the tower body is equipped with an air inlet pipe, and a connecting slot is opened on one side of the bottom of the tower body. The filter assembly includes a partition plate arranged inside the tower body and having several through holes in the circumference, several filter barrels passing through the through holes and detachably connected to the partition plate, and fillers respectively filled in the filter barrels. The outer wall of the filter barrel is equipped with an outer filter screen that separates the filler and the inner cavity of the tower body. An air outlet pipe is provided on one side of the tower body below the partition plate.

2. The waste gas purification tower for low-rank coal pyrolysis according to claim 1, characterized in that, An isolation ring is coaxially fixed to the inner side of the filter barrel. A receiving chamber for accommodating the packing material is formed between the outer wall of the isolation ring and the inner wall of the filter barrel. Several inner filter screens are provided circumferentially on the isolation ring.

3. The waste gas purification tower for low-rank coal pyrolysis according to claim 2, characterized in that, Inside the filter barrel, a guide rod is coaxially fixed. A slip ring is fitted around the guide rod. A scraper that fits against the inner filter screen is fixed to the outside of the slip ring. A pull rod extending out of the filter barrel is fixed to the top of the slip ring.

4. The waste gas purification tower for low-rank coal pyrolysis according to claim 3, characterized in that, The scraper is an annular scraper.

5. A waste gas purification tower for low-rank coal pyrolysis according to claim 3, characterized in that, The top of the pull rod is fixed with a protrusion, and the protrusion has a slot.

6. A waste gas purification tower for low-rank coal pyrolysis according to claim 3, characterized in that, The guide rod has a water supply trough coaxially inside, and several spray holes connected to the water supply trough are opened circumferentially on the guide rod. The tower body is provided with water supply structures that are connected to the water supply trough inside the guide rod.

7. A waste gas purification tower for low-rank coal pyrolysis according to claim 1, characterized in that, The spray assembly includes a support rod installed inside the tower body, a nozzle detachably connected to the free end of the support rod and coaxially installed inside the tower body, and a main water supply pipe connected to the nozzle.

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