CN211924288U

CN211924288U - Device for removing particulate matters in ship tail gas

Info

Publication number: CN211924288U
Application number: CN202020146229.7U
Authority: CN
Inventors: 刘庆岭; 何丽君; 梁兴雨; 杨广才; 顾明; 王力威; 李晓磊; 王亚军; 韩金峰; 付凯旋; 张子鼎; 杨佩剑; 赵倩; 张祖峰
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-11-13
Anticipated expiration: 2030-01-22

Abstract

The utility model belongs to the field of tail gas treatment, in particular to a device for removing particulate matters in ship tail gas, which comprises a shell and a tail gas treatment unit arranged in the shell; the two ends of the shell are respectively connected with an air inlet pipe and an air outlet pipe; the tail gas treatment unit comprises a bypass pipe, a filling pipe and a regulating valve; the air inlet pipe, the bypass pipe and the air outlet pipe form a first tail gas passage; the air inlet pipe, the filler pipe and the air outlet pipe form a second tail gas passage; the bypass pipe is provided with a regulating valve used for regulating the amount of the tail gas entering the first tail gas passage and the second tail gas passage in the air inlet pipe according to the back pressure of the engine and/or the smoke intensity of the discharged tail gas. The utility model discloses a device that is arranged in marine exhaust particulate matter to get rid of has following characteristics: the flow of tail gas entering the filler section is adjusted by the adjusting valve, so that the emission reduction effect can be flexibly controlled, and the service life of the filler is prolonged.

Description

Device for removing particulate matters in ship tail gas

Technical Field

The utility model belongs to the tail gas treatment field, concretely relates to a device that is arranged in boats and ships tail gas particulate matter to get rid of.

Background

China has become a large shipping country with the largest number of ships and the largest total tonnage, and pollution caused by the ships cannot be ignored. The ship mainly takes diesel oil or even heavy oil as fuel, and the exhaust gas contains a great deal of pollutants, mainly NOx, particulate matters and SO₂Mainly comprises the following steps. These pollutants cause environmental hazards such as reduced air quality, greenhouse effect, acid rain and ozone layer depletion and are a serious health hazard to humans.

In order to reduce air pollution caused by ships, the international maritime organization IMO has set the accessory convention vi of MARPOL73/78 (rules for preventing air pollution caused by ships), 2016 (8 months in 2016), and the ministry of environmental protection in China has issued "emission limit of exhaust pollutants of ship engines and measurement methods (first and second stages in china) (GB 15097-2016). Standards place clear limit requirements on emissions of pollutants such as marine engine Particulate Matter (PM), nitrogen oxides (NOx), Hydrocarbons (HC) and carbon monoxide (CO).

For particulate matters discharged by diesel engine exhaust, although the existing technology for treating particulate matters discharged by land diesel engines is mature, the technology cannot be directly applied to ship exhaust treatment due to the particularity of internal spaces of ships, ocean navigation, difference of emission regulations (different standards for exhaust emission in open sea, offshore ports and inland river regions), and the like, but the technology for purifying the particulate matters discharged by the land diesel engines is developed rarely at present. The main control difficulties are as follows:

1. the ship engine has a severe working environment, a safe and efficient ship tail gas treatment device is lacked, the ship tail gas treatment device can be flexibly adjusted according to various working conditions of the engine on the premise of ensuring that particulate matters in the ship tail gas reach the standard, and the operation of the engine is not influenced;

2. the ship space is compact, the available space is small, the requirement on the occupied land of the tail gas treatment device is strict, and the small and compact equipment for treating the particulate matters in the tail gas is required;

3. the current situation of tail gas treatment with large power, large exhaust amount and poor source emission of a marine diesel engine is not met by a treatment technology with wide application range and large fluctuation resistance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device that is arranged in particulate matter to get rid of ship's tail gas.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:

a device for removing particulate matters in ship exhaust comprises a shell and an exhaust treatment unit arranged in the shell; the two ends of the shell are respectively connected with an air inlet pipe and an air outlet pipe; the tail gas treatment unit comprises a bypass pipe and a filler pipe; the air inlet pipe, the bypass pipe and the air outlet pipe form a first tail gas passage; the air inlet pipe, the filler pipe and the air outlet pipe form a second tail gas passage; the bypass pipe is provided with a regulating valve used for regulating the amount of the tail gas entering the first tail gas passage and the second tail gas passage in the air inlet pipe according to the back pressure of the engine and/or the smoke intensity of the discharged tail gas.

The bypass pipe is arranged in the middle of the tail gas treatment unit, and the filler pipes are respectively arranged on two sides of the bypass pipe.

The air inlet pipe, the air outlet pipe and the bypass pipe are internally provided with sensors; the sensor is used for detecting temperature, pressure and particulate matter content.

The shell is an openable structure and used for overhauling or replacing filler pipe fillers.

The tail end of the bypass pipe is fixedly connected with the shell; and the tail end of the bypass pipe is provided with an opening for forming a second tail gas passage.

The DOC catalyst and the CDPF/DPF/SCRF particle trap are filled in the filling pipe.

The joints of the air inlet pipe and the air outlet pipe with the shell are provided with flaring sections; the angle of the flaring section is 0-90 degrees.

The angle of the flaring section is alpha which is 45 degrees.

The regulating valve is a butterfly valve or a gate valve.

The opening of the regulating valve is 0-100%.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a device that is arranged in marine exhaust particulate matter to get rid of has following characteristics: 1) utilize the gas flow characteristics, with the bypass pipe built-in, effectively reduce tail gas processing apparatus volume, reduce the design and the installation degree of difficulty, more be suitable for narrow and small complicated boats and ships under-deck to arrange. 2) The flow of tail gas entering the filler section is adjusted by the adjusting valve, so that the emission reduction effect can be flexibly controlled, and the service life of the filler is prolonged. 3) The governing valve adjusts the bypass pipe air input according to pressure detection value, reduces the engine backpressure, plays effective regulating action to engine dynamic behavior and combustion performance, guarantees the safe operation of ship engine (start-up, idle speed, operation, troubleshooting etc.) under each operating mode, the utility model discloses to engine work strong adaptability. 4) The filler in the filler cavity can be flexibly adjusted and filled in one or more sections, and the emission of harmful gases such as particulate matters, NOx, HC, CO and the like can be effectively reduced. The utility model discloses control to boats and ships emission particulate matter has the significance.

Drawings

FIG. 1-2 is the schematic view of the overall structure of the device for removing particulate matters in ship exhaust gas of the present invention

Fig. 3 is a three-dimensional effect diagram of exhaust gas purification according to an embodiment of the present invention;

fig. 4 is a diagram illustrating the exhaust gas purifying effect and the pressure variation trend according to an embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

Fig. 1-3 show an apparatus for removing particulate matter from marine exhaust gas, comprising a housing 4 and an exhaust gas treatment unit disposed within said housing; the two ends of the shell are respectively connected with an air inlet pipe 1 and an air outlet pipe 6; the tail gas treatment unit comprises a bypass pipe 3, a filling pipe 5 and a regulating valve 2; the air inlet pipe, the bypass pipe and the air outlet pipe form a first tail gas passage; the air inlet pipe, the filler pipe and the air outlet pipe form a second tail gas passage; the bypass pipe is provided with an adjusting valve 2 for adjusting the amount of the tail gas entering the first tail gas passage and the second tail gas passage in the gas inlet pipe. The bypass pipe is arranged in the middle of the shell, and the filler pipe is respectively arranged on two sides of the bypass pipe. The DOC catalyst and the CDPF/DPF/SCRF particle trap are filled in the filling pipe. The shell is an openable structure and used for overhauling or replacing filler pipe fillers. The tail end of the bypass pipe is fixedly connected with the shell; and the tail end of the by-pass pipe is provided with an opening 10 for forming a second tail gas passage.

The air inlet pipe, the air outlet pipe and the bypass pipe are internally provided with sensors 7; the sensor is used for detecting temperature, pressure and particulate matter content. The joints of the air inlet pipe and the air outlet pipe with the shell are provided with flaring sections; the angle of the flaring segment can be 0-90 degrees. The angle of the flared section in this embodiment is equal to 45 degrees. The regulating valve is a butterfly valve or a gate valve. The opening of the regulating valve is 0-100%. The smoke intensity and the back pressure of the engine can be adjusted in a manual or electric mode.

The utility model discloses a purifier arranges in boats and ships tail gas aftertreatment region, through governing valve control, tail gas can be whole or part through packing to distinguish and purify the back and get into the atmosphere, also can not pass through the packing district, from the atmosphere of directly discharging of intermediate bypass pipe. The tail gas of the diesel engine can achieve good treatment effect after being treated by the purification device.

The embodiment of the utility model provides an in, a testing result that is arranged in device that particulate matter got rid of among marine exhaust is provided, as shown in figure 4 testing result, under the diesel engine stable operating mode, set up regulating valve opening (100%, 50%, 25%, 10%, 0%), the parameter variation condition of exhaust smoke degree and each point pressure is: when the opening of the valve is 100%, the exhaust smoke degree is 0.4; when the valve opening is 50%, the exhaust smoke degree is reduced and increased, the back pressure of the engine is smaller and is 3kPa, when the valve opening is 10%, the exhaust smoke degree is lower than 0.1, the inlet pressure of the engine is 10.5 kPa, and when the valve opening is 0%, namely all gas enters the filler pipe for purification, the exhaust smoke degree is the lowest, and the inlet pressure of the engine is the highest. When the filler is fresh, the tail gas purification efficiency is high, the exhaust back pressure is low, and the tail gas entering the filler section can be controlled by the regulating valve within the allowable range of the engine, so that the tail gas reaches the standard and is discharged; the tail gas purification efficiency is reduced along with the aging of the filler, and in order to ensure that the normal work of an engine is not influenced, the tail gas entering the filler section can be gradually increased through the regulating valve, so that the tail gas is ensured to be discharged up to the standard; when the filler reaches the service life, the bypass pipeline is fully opened to ensure the normal operation of the engine, and the filler in the filler pipe is replaced.

The embodiment of the utility model provides an in, an equipment map for particulate matter remove device in marine exhaust is provided, the bypass pipe is arranged in the middle of purifier, be equipped with the filler pipe between shell and the inside bypass pipe, it honeycombed wall flow formula trap for DOC catalyst converter and CDPF to pack, intake segment flaring and exhaust segment flaring angle alpha are 45, the governing valve is the butterfly valve, the governing valve detects numerical value according to manometer and smoke intensity tester and adjusts the aperture, under the condition of guaranteeing the normal work of engine, make final exhaust gas in particulate matter content up to standard.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The device for removing the particulate matters in the ship exhaust is characterized by comprising a shell and an exhaust treatment unit arranged in the shell; the two ends of the shell are respectively connected with an air inlet pipe and an air outlet pipe; the tail gas treatment unit comprises a bypass pipe, a filling pipe and a regulating valve; the air inlet pipe, the bypass pipe and the air outlet pipe form a first tail gas passage; the air inlet pipe, the filler pipe and the air outlet pipe form a second tail gas passage; the bypass pipe is provided with a regulating valve used for regulating the amount of the tail gas entering the first tail gas passage and the second tail gas passage in the air inlet pipe according to the back pressure of the engine and/or the smoke intensity of the discharged tail gas.

2. The apparatus for removing particulate matter from marine exhaust according to claim 1, wherein the bypass pipe is disposed at a middle position of the exhaust gas treatment unit, and the filler pipe is disposed at both sides of the bypass pipe.

3. The device for removing particulate matters in marine exhaust according to claim 2, wherein the tail end of the bypass pipe is fixedly connected with the shell; and the tail end of the bypass pipe is provided with an opening for forming a second tail gas passage.

4. The device for removing particulate matters in marine exhaust according to claim 1, wherein sensors are arranged on the air inlet pipe, the air outlet pipe and the by-pass pipe; the sensor is used for detecting temperature, pressure and particulate matter content.

5. The device of claim 1, wherein the filler tube is filled with DOC catalyst and CDPF/DPF/SCRF particle trap.

6. The apparatus as claimed in claim 1, wherein the housing is an openable structure for repairing or replacing the filler pipe packing.

7. The device for removing the particulate matters in the ship exhaust according to claim 1, wherein the connection parts of the air inlet pipe and the air outlet pipe with the shell are provided with flaring sections; the angle of the flaring section is 0-90 degrees.

8. The device for removing particulate matter from marine exhaust according to claim 7, wherein the angle of the flared section is 45 degrees.

9. The device for removing particulate matters in marine exhaust according to claim 1, wherein the regulating valve is a butterfly valve or a gate valve.

10. The device for removing particulate matter from marine exhaust according to claim 1, wherein the opening degree of the regulating valve is 0-100%.