CN214715649U

CN214715649U - Tail gas washing treatment system of core shooter

Info

Publication number: CN214715649U
Application number: CN202121315753.3U
Authority: CN
Inventors: 冯新林; 仲维贺; 冯振亮
Original assignee: Jinan Lin Qing Casting Technology Co ltd
Current assignee: Jinan Lin Qing Casting Technology Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-11-16
Anticipated expiration: 2031-06-11

Abstract

A tail gas washing treatment system of a core shooting machine comprises an acid liquor pool, a spraying container, a tail gas collecting device, a water mist spraying device, a large-flow spraying device and a discharging device, wherein the spraying container is connected with the tail gas collecting device, the water mist spraying device and the large-flow spraying device are arranged between the acid liquor pool and the spraying container, and the discharging device is connected to the upper portion of the spraying container. And (3) injecting a phosphoric acid solution with a certain concentration into the acid liquor pool. Starting a collecting device in the core making process to collect tail gas containing triethylamine intermittently generated to a spraying container, and then spraying acid liquor; firstly, starting a water mist spraying device to carry out acid liquor atomization spraying on tail gas in a spraying container, and then starting a large-flow spraying device to spray large-flow phosphoric acid water solution to deposit acid mist generated by atomization spraying. And finally, discharging the tail gas reaching the standard through a discharging device. The system has the advantages of good treatment effect, high efficiency, capability of ensuring that the tail gas emission reaches the standard, low acid liquid consumption and low energy consumption.

Description

Tail gas washing treatment system of core shooter

Technical Field

The utility model relates to a purification unit that is used for triethylamine tail gas that core shooting machine system core in-process produced belongs to triethylamine tail gas treatment technical field.

Background

The preparation of sand cores and sand molds in the casting industry is an important link, the cores are usually manufactured by a core shooter, and an amine blowing process is needed in the core manufacturing process, so that tail gas containing triethylamine is generated, and the triethylamine tail gas has the characteristic of intermittent emission.

At present, tail gas of a washing tower used for triethylamine tail gas treatment is discharged into a large enclosure in space, the tail gas is rarely distributed, then a draught fan is used for pumping away the tail gas for spraying treatment, the tail gas is sprayed and pickled in the tail gas discharge process, the tail gas and acid liquor are wiped by the way, the tail gas and the acid liquor cannot be fully mixed, the neutralization time is short, and the draught fan is too large in air volume and is easy to take away the acid liquor. There are problems in that: poor treatment and purification effect, large acid liquor consumption and high energy consumption.

Disclosure of Invention

The utility model discloses blow not enough that amine tail gas processing technique exists to the coremaking process in the current casting, provide a core shooter tail gas washing processing system that treatment effect is good, the energy consumption is low.

The utility model discloses a core shooter tail gas washing processing system adopts following technical scheme:

the system comprises an acid liquor pool, a spraying container, a tail gas collecting device, a water mist spraying device, a large-flow spraying device and a discharging device, wherein the spraying container is connected with the tail gas collecting device, the water mist spraying device and the large-flow spraying device are arranged between the acid liquor pool and the spraying container, and the discharging device is connected to the upper part of the spraying container.

The spraying container is a soft bag, the soft bag has a telescopic characteristic, and can be stretched according to the collected tail gas quantity, so that the soft bag can be fully filled with tail gas and can be fully contacted with acid liquor, and the treatment effect is ensured.

Two spraying containers (soft bags) are arranged, and the large core shooter adopts the double soft bags to alternately operate and process so as to meet the requirement of the long-time amine blowing process.

The tail gas collecting device comprises a collecting fan, an inlet of the collecting fan is connected with a tail gas pipeline of the core shooter, and an outlet of the collecting fan is connected with a spraying container through an air inlet valve. And starting the collecting fan to collect the discontinuously generated tail gas to the spraying container.

The water mist spraying device comprises a first spraying pump and a first spraying pipe, wherein the inlet and the outlet of the first spraying pump are respectively connected with the acid liquid pool and the first spraying pipe, and water mist spray heads are distributed on the first spraying pipe.

The high-flow spray device comprises a second spray pump and a second spray pipe, wherein the inlet and the outlet of the second spray pump are respectively connected with the acid liquor pool and the second spray pipe, and the second spray pipe is distributed with high-flow spray heads.

The discharging device comprises a discharging fan, and the discharging fan is connected with the spraying container through a discharging valve. And starting the discharge fan to discharge the sprayed gas.

And (3) injecting a phosphoric acid solution with a certain concentration into the acid liquor pool. Starting a collecting device in the core making process to collect tail gas containing triethylamine intermittently generated to a spraying container, and then spraying acid liquor; firstly, starting a water mist spraying device to carry out acid liquor atomization spraying on tail gas in a spraying container, and then starting a large-flow spraying device to spray large-flow phosphoric acid water solution to deposit acid mist generated by atomization spraying. And finally, discharging the tail gas reaching the standard through a discharging device.

The utility model directly extracts the tail gas in the amine blowing process from the bottom frame of the core box with small volume, collects the tail gas into the soft bag, intensively sprays phosphoric acid water mist, then sprays large-flow phosphoric acid water solution to deposit acid mist, and then starts the draught fan to discharge the tail gas reaching the standard; the first is that the treatment effect is good, the efficiency is high, the discharge can be ensured to reach the standard, and the second is that the acid liquor consumption is low, and the acid liquor consumption is 10 percent of that of the traditional washing tower at present; and thirdly, the energy consumption is low, the power of a tail gas collecting fan is only 3KW, the power of a tail gas discharging fan is only 1.1KW, and the energy consumption is 30% of that of the current matched washing tower.

Drawings

Fig. 1 is a schematic structural diagram of the tail gas washing and treating system of the core shooter of the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a top view of fig. 1.

Wherein: 1. the device comprises a support, 2, an acid liquor pool, 3, a large-flow spray head, 4, a water spray head, 5, a first soft bag, 6, a second soft bag, 7, a first discharge valve, 8, a second discharge valve, 9, a discharge pipeline, 10, a discharge fan, 11, a first air inlet pipe, 12, a second air inlet pipe, 13, a first spray pipe, 14, a second spray pipe, 15, a first spray pump, 16, a second spray pump, 17, a collection fan, 18, a first air inlet valve and 19, a second air inlet valve.

Detailed Description

As shown in fig. 1, fig. 2 and fig. 3, the tail gas washing and treating system for core shooter of the present invention comprises a bracket 1, an acid liquid pool 2, a spraying container, a tail gas collecting device, a water mist spraying device, a large flow spraying device and a discharging device. The bottom of the bracket 1 is provided with an acid liquid pool 2. The spraying container is arranged on the bracket 1 and positioned at the upper part of the acid liquor pool 2. The spraying container adopts a soft bag with the telescopic characteristic, the soft bag can be stretched according to the collected tail gas amount so as to ensure that the soft bag is filled with the tail gas, thus the tail gas can be fully contacted with the acid liquor, the soft bags can be arranged in a plurality, and a first soft bag 5 and a second soft bag 6 are arranged in the graph 1. The spraying container (the first soft bag 5 and the second soft bag 6) is connected with the tail gas collecting device. A large-flow spraying device and a water mist spraying device are arranged between the acid liquor pool 2 and each spraying container (the first soft bag 5 and the second soft bag 6). The upper part of the spraying container (the first soft bag 5 and the second soft bag 6) is connected with a discharging device.

The tail gas collecting device comprises a collecting fan 17, referring to fig. 3, an inlet of the collecting fan 17 is connected with a tail gas pipeline of the core shooting machine, an outlet of the collecting fan 17 is connected with a first air inlet pipe 11 and a second air inlet pipe 12 through a first air inlet valve 18 and a second air inlet valve 19 respectively, and the first air inlet pipe 11 and the second air inlet pipe 12 are connected with a first soft bag 5 and a second soft bag 6 respectively. The first intake valve 18 and the second intake valve 19 may employ pneumatic butterfly valves. And starting the collecting fan 17, opening the first air inlet valve 18 and/or the second air inlet valve 19, and collecting the tail gas generated discontinuously to the first soft bag 5 and/or the second soft bag 6 through the first air inlet pipe 11 and/or the second air inlet pipe 12.

The water mist spraying device comprises a first spraying pump 15 and a first spraying pipe 13, see fig. 2. The inlet and the outlet of the first spray pump 15 are respectively connected with the acid liquid pool 2 and the first spray pipe 13, and the first spray pipe 13 is distributed with water mist nozzles 4. And starting the first spraying pump 15, sucking the acid liquor in the acid liquor pool 2, and atomizing and spraying the acid liquor by the water mist spray head 4. The flow of the water mist spray head 4 is smaller than that of the large-flow spray head 3.

The mass flow spray arrangement comprises a second spray pump 16 and a second spray pipe 14, see fig. 2. The inlet and the outlet of the second spray pump 16 are respectively connected with the acid liquid pool 2 and the second spray pipe 14, and the second spray pipe 14 is distributed with a large-flow spray head 3. And starting the second spray pump 16 to suck the acid liquor in the acid liquor pool 2, and spraying out the acid liquor in a large flow rate through the large-flow spray head 3.

The exhaust means comprises an exhaust fan 10, see fig. 1. The inlet of the exhaust fan 10 is connected with an exhaust pipeline 9, and the exhaust pipeline 9 is respectively connected with the first soft bag 5 and the second soft bag 6 through a first exhaust valve 7 and a second exhaust valve 8. And starting the exhaust fan 10, opening the first exhaust valve 7 and/or the second exhaust valve 8, and exhausting the gas in the first soft bag 5 and/or the second soft bag 6 after spraying treatment through an exhaust pipeline 9. The first and

second discharge valves

7 and 8 may employ pneumatic butterfly valves.

The operation process of the tail gas washing treatment system of the core shooter is as follows.

Phosphoric acid solution with certain concentration is injected into the acid solution pool 2. Starting a collecting fan 17 and an air inlet valve (a first air inlet valve 18 and/or a second air inlet valve 19) in the core making process, closing a discharge fan 10 and a discharge valve (a first discharge valve 7 and/or a second discharge valve 8), collecting tail gas containing triethylamine generated discontinuously into a soft bag (a first soft bag 5 and/or a second soft bag 6), and closing the collecting fan 17 and the air inlet valve to spray acid liquor when the soft bag swells to have a certain amount of tail gas.

First, the first spray pump 15 is started to make the acid solution (phosphoric acid water solution) spray the tail gas in the soft bag through the first spray pipe 13 and the water mist nozzle 4. And starting the second spray pump 16 after the atomized spray is carried out for a certain time, and spraying a large-flow phosphoric acid aqueous solution to deposit acid mist generated by the atomized spray.

After spraying is finished, the exhaust fan 10 and the exhaust valve (the first exhaust valve 7 and/or the second exhaust valve 8) are opened, and the tail gas reaching the standard is exhausted.

For a large core shooter, two soft bags are arranged, and the double soft bags are alternately operated to meet the requirement of a long-time amine blowing process.

Claims

1. A tail gas washing and treating system of a core shooting machine is characterized by comprising an acid liquor pool, a spraying container, a tail gas collecting device, a water mist spraying device, a large-flow spraying device and a discharging device, wherein the spraying container is connected with the tail gas collecting device, the water mist spraying device and the large-flow spraying device are arranged between the acid liquor pool and the spraying container, and the discharging device is connected to the upper portion of the spraying container.

2. The core shooting machine tail gas washing treatment system as recited in claim 1, wherein the spray container is a soft bag.

3. The core shooter tail gas scrubbing treatment system according to claim 1 or 2, wherein two spraying containers are provided.

4. A core shooting machine tail gas washing treatment system as claimed in claim 1, wherein the tail gas collecting device comprises a collecting fan, and an outlet of the collecting fan is connected with the spraying container through an air inlet valve.

5. The tail gas washing treatment system for the core shooter as claimed in claim 1, wherein the water mist spraying device comprises a first spraying pump and a first spraying pipe, an inlet and an outlet of the first spraying pump are respectively connected with the acid liquid tank and the first spraying pipe, and water mist nozzles are distributed on the first spraying pipe.

6. The tail gas washing treatment system for the core shooter according to claim 1, wherein the high-flow spray device comprises a second spray pump and a second spray pipe, an inlet and an outlet of the second spray pump are respectively connected with the acid liquid tank and the second spray pipe, and high-flow spray heads are distributed on the second spray pipe.

7. A core shooting machine exhaust scrubbing treatment system as claimed in claim 1 wherein said exhaust means comprises an exhaust fan connected to the spray container through an exhaust valve.