CN214619599U

CN214619599U - Integrated waste liquid incineration boiler

Info

Publication number: CN214619599U
Application number: CN202022821216.8U
Authority: CN
Inventors: 朱平江; 邹娴
Original assignee: WUXI HUAGUANG INDUSTRIAL BOILER CO LTD
Current assignee: WUXI HUAGUANG INDUSTRIAL BOILER CO LTD
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-11-05
Anticipated expiration: 2030-11-30

Abstract

The utility model relates to an integration waste liquid incineration boiler, including drum, furnace, combustor, cooling chamber, water-cooling screen, over heater, turn flue, economizer, bypass flue. The salt-containing waste liquid is combusted in a hearth through a combustor, waste residues are discharged in a liquid state at the bottom of the hearth, and then high-temperature flue gas turns to enter a cooling chamber with a water-cooling screen, is cooled to be lower than the melting point of alkaline salt and then enters a high-temperature superheater and a low-temperature superheater which are arranged in a horizontal flue. Then the flue gas is introduced into a turning flue, wherein whether the quenching spray device is used or not is determined according to the components of the waste liquid. The utility model discloses with the mechanical bonding of waste liquid incineration boiler and flue gas rapid cooling device, can use the rapid cooling device as required according to the waste liquid composition, solved among the prior art heat transfer efficiency low and the flue gas emission has the problem of polluting. The utility model discloses compact structure, occupation of land are little, and heat conversion efficiency is high.

Description

Integrated waste liquid incineration boiler

Technical Field

The utility model belongs to the technical field of boiler equipment, a integration waste liquid incineration boiler structure is related to.

Background

With the continuous development of the petrochemical industry in China, the production and discharge of waste liquid are increased continuously, some of the substances can be automatically decomposed, some of the substances need manual treatment, and otherwise, the substances can bring serious harm to the nature and the environment. The incineration treatment method is particularly suitable when the waste liquid contains substances which have high concentration and strong corrosiveness and cannot be treated by using the biochemical reaction principle. Through high-temperature combustion, substances which are difficult to degrade in the salt-containing waste liquid can be decomposed to be changed into small-volume non-toxic substances, and the generated heat can be recycled.

The waste liquid incineration technology in the past usually adopts the combination form of incinerator and exhaust-heat boiler, burns the waste liquid in the incinerator first, later retrieves the heat that the flue gas carried in through the exhaust-heat boiler. Because the whole process needs two devices of an incinerator and a waste heat boiler, the defects of insufficient simplicity and convenience in operation and low heat conversion efficiency exist.

Disclosure of Invention

An object of the utility model is to provide an integration waste liquid incineration boiler can realize the incineration of waste liquid and thermal recovery simultaneously in this single-unit boiler. Meanwhile, in the integrated incineration boiler, a quenching spray device is combined and arranged, and whether the integrated incineration boiler is put into use or not can be determined according to the components of the waste liquid, so that the heat utilization rate is improved to the maximum extent on the premise of meeting the environmental protection requirement.

According to the technical scheme provided by the utility model, an integration waste liquid incineration boiler, including combustor, furnace, row's cinder notch, cooling chamber, water-cooling screen, drum, high temperature over heater, low temperature over heater, horizontal flue, turn flue, rapid cooling spray set, bypass flue, exhanst gas outlet, the combustor is arranged at furnace's top, and the furnace outside is equipped with drum and collection steam header, the cooling chamber is established in the furnace export, is provided with the water-cooling screen in the cooling chamber, and horizontal flue establishes the export in the cooling chamber, be equipped with high temperature over heater and low temperature over heater in the horizontal flue, horizontal flue is linked together with the turn flue, is equipped with rapid cooling spray set in the turn flue, two flues are divided to the end of turn flue, and one of them flue is connected with the bypass flue, and another flue is connected with the afterbody flue, be equipped with medium temperature over heater in the afterbody flue, The tail end of the tail flue and the tail end of the bypass flue are both connected with the flue gas outlet.

As a further improvement of the utility model, the furnace is a partial heat insulation structure.

As a further improvement of the utility model, the bottom of the furnace chamber is provided with a slag discharge port, and the boiler adopts a liquid slag discharge mode.

The high-temperature superheater, the low-temperature superheater, the medium-temperature superheater, the high-temperature section of the economizer and the low-temperature section of the economizer all comprise heating surface pipe systems, inlet and outlet header tanks, inlet and outlet connecting pipes and pipe system fixing pieces, water or steam enters the inlet header tank from the last heating surface through the inlet connecting pipe, is heated by the heating surface pipe systems, enters the outlet header tank and then is led to the next heating surface through the outlet connecting pipe, and the heating surface pipe systems are fixed through the pipe system fixing pieces.

The rapid cooling spray device comprises a water tank, a spray water pump, a spray pipe, a spray head and a liquid return port, wherein the spray water pump is connected with an external water pipe to the water tank, and the spray pipe spray head and the liquid return port are arranged on the water tank.

As a further improvement, the tail flue is close to the smoke outlet and is provided with a smoke rear baffle.

As a further improvement, the bypass flue is close to the flue gas outlet and is equipped with the baffle before the flue gas.

As the utility model discloses a further improvement, along the flue gas flow direction, the flue gas flows through high temperature over heater and low temperature over heater in proper order, flows through medium temperature over heater again.

Compared with the prior art, the utility model, have following advantage:

1. through the reasonable design boiler type, can realize in single boiler, realize the incineration of waste liquid and thermal recovery simultaneously, the whole is arranged simply, and operation maintenance is simple and convenient.

2. The furnace chamber is a partial heat insulation structure, the boiler adopts liquid state slag discharge, and a slag discharge port is arranged at the bottom of the furnace chamber. The high-temperature combustion can decompose substances which are difficult to degrade in the salt-containing waste liquid to the maximum extent, so that the substances are changed into small-volume non-toxic substances, and heat is fully released.

3. Along the flow direction of the flue gas, the flue gas firstly flows through the high-temperature superheater and the low-temperature superheater and then flows through the medium-temperature superheater. The tail flue is arranged with a medium-temperature superheater instead of a low-temperature superheater, and the arrangement mode can effectively protect the medium-temperature superheater, so that the medium-temperature superheater can not be damaged due to water plug under the working condition that the tail flue is not subjected to flue gas circulation when the quenching device is put into use.

4. The temperature of the flue gas can be reduced to be lower than the melting point of the alkaline salt through the cooling chamber, so that the clean and reliable work of the horizontal flue superheater is ensured.

5. The combined arrangement of the quenching spray device can ensure that the flue gas after quenching treatment can meet the environmental protection requirement when the waste liquid contains toxic and harmful components; when the waste liquid does not contain toxic and harmful components, the device is closed, and the flue gas continuously enters the tail flue to release heat after passing through the turning flue. Therefore, the boiler can improve the heat utilization rate to the maximum extent on the premise of meeting the environmental protection requirement.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Description of reference numerals: the system comprises a combustor 1, a hearth 2, a slag discharge port 3, a cooling chamber 4, a water screen 5, a drum 6, a high-temperature superheater 7, a low-temperature superheater 8, a horizontal flue 9, a turning flue 10, a quenching spray device 11, a flue gas front baffle 12, a bypass flue 13, a flue gas outlet 14, a tail flue 15, a flue gas rear baffle 16, a medium-temperature superheater 17, an economizer high-temperature section 18, an economizer low-temperature section 19 and a steam collection box 20.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In the figure 1, the device comprises a combustor 1, a hearth 2, a slag discharge port 3, a cooling chamber 4, a water cooling screen 5, a drum 6, a high-temperature superheater 7, a low-temperature superheater 8, a horizontal flue 9, a turning flue 10, a quenching spray device 11, a flue gas front baffle 12, a bypass flue 13, a flue gas outlet 14, a tail flue 15, a flue gas rear baffle 16, a medium-temperature superheater 17, an economizer high-temperature section 18, an economizer low-temperature section 19 and a steam collection box 20.

The combustor is characterized in that the tail end of the turning flue 10 is divided into two flues, one flue is connected with a bypass flue 13, the other flue is connected with a tail flue 15, a medium temperature superheater 17, a coal economizer high temperature section 18 and a coal economizer low temperature section 19 are arranged in the tail flue 15, and the tail ends of the tail flue and the bypass flue are connected with a flue gas outlet 14.

The furnace 2 is a partial heat insulation structure, the bottom of the furnace 2 is provided with a slag discharge port 3, and the boiler adopts a liquid slag discharge mode.

The high-temperature superheater 7, the low-temperature superheater 8, the medium-temperature superheater 17, the economizer high-temperature section 18 and the economizer low-temperature section 19 respectively comprise a heating surface pipe system, an inlet-outlet header, an inlet-outlet connecting pipe and a pipe system fixing piece, water or steam enters the inlet header from the last heating surface through the inlet connecting pipe, is heated by the heating surface pipe system, enters the outlet header and is led to the next heating surface through the outlet connecting pipe, and the heating surface pipe system is fixed through the pipe system fixing piece.

The rapid cooling spray device 11 comprises a water tank, a spray water pump, a spray pipe, a spray head and a liquid return port, wherein the spray water pump is connected with an external water pipe to the water tank, and the spray pipe spray head and the liquid return port are arranged on the water tank; the operation of the rapid cooling spray device 11 is determined according to the components of the waste liquid, when the rapid cooling spray device 11 is operated, the front flue gas baffle 12 is opened, and the rear flue gas baffle 16 is closed; when the quenching spray device 11 is not used, the smoke front baffle 12 is closed, and the smoke rear baffle 16 is opened.

And a flue gas rear baffle 16 is arranged at the position of the tail flue 15 close to the flue gas outlet 14.

And a flue gas front baffle 12 is arranged at the position of the bypass flue 13, which is close to the flue gas outlet 14.

In the actual working process, along the flow direction of the flue gas, the flue gas firstly flows through the high-temperature superheater 7 and the low-temperature superheater 8 and then flows through the medium-temperature superheater 17; in the tail flue 15, along the flow direction of flue gas, the high-temperature section 18 of the economizer is in front, and the low-temperature section 19 of the economizer is behind.

The working process of the utility model is as follows:

the salt-containing waste liquid is combusted in the hearth 2 through the combustor, the waste residue is discharged in a liquid state at the bottom of the hearth, then the high-temperature flue gas turns to enter the cooling chamber 4 with the water-cooling screen 5, the temperature is reduced to be lower than the melting point of alkaline salt and then enters the high-temperature superheater 7 and the low-temperature superheater 8 which are arranged in the horizontal flue, and then the flue gas is introduced into the turning flue 10, wherein whether the quenching spray device 11 is put into use or not is determined according to the components of the waste liquid, and the heat utilization rate can be improved to the maximum extent on the premise of meeting the environmental protection requirement.

Claims

1. An integrated waste liquid incineration boiler comprises a combustor (1), a hearth (2), a slag discharge port (3), a cooling chamber (4), a water cooling screen (5), a drum (6), a high-temperature superheater (7), a low-temperature superheater (8), a horizontal flue (9), a turning flue (10), a quenching spray device (11), a bypass flue (13) and a flue gas outlet (14), wherein the combustor (1) is arranged at the top of the hearth (2), the drum (6) and a steam collection box (20) are arranged at the top of the hearth (2), the cooling chamber (4) is arranged at the outlet of the hearth (2), the water cooling screen (5) is arranged in the cooling chamber (4), the horizontal flue (9) is arranged at the outlet of the cooling chamber (4), the high-temperature superheater (7) and the low-temperature superheater (8) are arranged in the horizontal flue (9), and the horizontal flue (9) is communicated with the flue turning (10), the turning flue (10) is internally provided with a quenching spray device (11), and is characterized in that the tail end of the turning flue (10) is divided into two flues, one flue is connected with a bypass flue (13), the other flue is connected with a tail flue (15), the tail flue (15) is internally provided with a medium temperature superheater (17), a high temperature section (18) of an economizer and a low temperature section (19) of the economizer, and the tail ends of the tail flue and the bypass flue are connected with a flue gas outlet (14).

2. An integrated spent liquor incineration boiler according to claim 1, characterized in that the furnace (2) is of a partly insulating construction.

3. An integrated waste liquid incineration boiler according to claim 1, characterized in that the bottom of the furnace (2) is provided with a slag discharge port (3), and the boiler adopts a slag tapping mode.

4. The integrated waste liquid incineration boiler according to claim 1, wherein the high temperature superheater (7), the low temperature superheater (8), the medium temperature superheater (17), the economizer high temperature section (18), and the economizer low temperature section (19) each include a heating surface piping system, an inlet and outlet header, an inlet and outlet connection pipe, and a piping system fixing member, water or steam enters the inlet header from the previous heating surface through the inlet connection pipe, is heated by the heating surface piping system, comes to the outlet header, and is guided to the next heating surface through the outlet connection pipe, and the heating surface piping system is fixed by the piping system fixing member.

5. An integrated waste incineration boiler according to claim 1, wherein the quenching spray device (11) comprises a water tank, a spray water pump, a spray pipe, a spray head and a liquid return port, the spray water pump connects an external water pipe to the water tank, and the water tank is provided with the spray pipe spray head and the liquid return port.

6. An integrated waste incineration boiler according to claim 1, characterised in that the back pass (15) is provided with a flue gas backplate (16) near the flue gas outlet (14).

7. An integrated waste incineration boiler according to claim 1, characterised in that the bypass flue (13) is provided with a flue gas front baffle (12) near the flue gas outlet (14).

8. An integrated waste liquid incineration boiler according to claim 1, characterized in that in the flue gas flow direction, the flue gas flows through the high temperature superheater (7) and the low temperature superheater (8) in sequence, and then flows through the medium temperature superheater (17).