Ship exhaust SCR (Selective Catalytic Reduction) denitration reactor

Abstract

The utility model discloses a ship exhaust SCR (Selective Catalytic Reduction) denitration reactor. The ship exhaust SCR denitration reactor comprises a main body structure, and a front-end smoke dust filter, a flow equalizing piece, a soot blowing assembly, an SCR catalyst module and a rear-end smoke dust filter which are positioned in the main body structure and are sequentially arranged along a gas flow direction. The main body structure comprises a main body structure I and a main body structure II which are symmetrically arranged, the main body structure I and the main body structure II are mutually fixed, and the SCR catalyst module is pressed and positioned through the main body structure I and the main body structure II. According to the scheme, the first main structure and the second main structure facilitate installation, disassembly and maintenance of internal elements, all the assemblies are compact in structure, and the using requirement for ship tail gas treatment is met. And dust in the SCR catalyst module is periodically blown by arranging the dust blowing assembly, so that pore channels in the SCR catalyst module are prevented from being blocked, and the waste gas treatment effect and efficiency are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of SCR denitration reactor, more specifically, relate to a ship exhaust SCR denitration reactor. BACKGROUND

[0002] Nitrogen oxides as one of atmospheric pollutants, easy to form acid rain, and will derive photochemical smog endanger human health. According to statistics, global shipping ship emissions NOX accounts for 15% to 30% of total emissions. In view of the increasingly serious environmental problems, the international maritime organization has promulgated Tier III emission standards, requires nitrogen oxides to decrease 80% on the basis of Tier I standard, and will take effect on January 1, 2016, that is, the exhaust gas generated by the ship sailing in the emission control area (ECA) must meet the standard. Since Tier III emission standards are more stringent, it is necessary to install SCR denitration or dual fuel to achieve nitrogen oxides emission standard.

[0003] Ship exhaust SCR catalyst is used for a kind of exhaust gas aftertreatment device, and most commercial ships currently use diesel fuel engine, and the principle of this technology is that reducing agent ammonia is selectively reduced to nitrogen and water in the environment of oxygen-rich under the action of SCR denitration catalyst, and SCR denitration technology is widely used in the ship industry due to its high denitration efficiency, stable performance, mature technology and other factors.

[0004] At present, due to the limited internal space of the ship, the SCR denitration reactor is arranged compactly, and the SCR denitration reactor is small, which can easily cause uneven distribution of exhaust flow field, and there are fine dust in the exhaust gas of the ship engine, which can accumulate and block the internal SCR denitration catalyst, so that the internal flue gas of the SCR denitration reactor flows poorly, affects the exhaust gas treatment effect and treatment efficiency, and the gas accumulates in the reactor, which has certain safety hazards. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of ship exhaust SCR denitration reactor to solve the technical problems existing in the above background technology.

[0006] The utility model technical scheme provides a kind of ship exhaust SCR denitration reactor, including main body structure, front end dust filter, flow equalizing piece, soot blowing assembly, SCR catalyst module and rear end dust filter located in the main body structure and arranged in sequence along the gas flow direction;

[0007] The main body structure includes the main body structure one and the main body structure two arranged symmetrically, the main body structure one and the main body structure two are fixed, and the SCR catalyst module is positioned by the main body structure one and the main body structure two;

[0008] The soot blowing assembly comprises a blowing member arranged opposite to the SCR catalyst module and a driving member for driving the blowing member to rotate.

[0009] In a preferred embodiment, the main structure one and the main structure two are provided with SCR catalyst module sockets, and the SCR catalyst module is inserted into the main structure one and the main structure two respectively, and the two ends are respectively abutted with the inside of the main structure one and the main structure two.

[0010] In a preferred embodiment, the SCR catalyst module is externally provided with a buffer sleeve.

[0011] In a preferred embodiment, the blowing member comprises an air inlet pipe, a flow guide pipe rotationally connected with the air inlet pipe, a plurality of soot blowing pipes connected with the flow guide pipe, a plurality of soot blowing nozzles equidistantly arranged on the soot blowing pipes along the length direction of the soot blowing pipes, and the soot blowing nozzles are directed towards the SCR catalyst module.

[0012] In a preferred embodiment, the plurality of soot blowing pipes are in the same circular area, each soot blowing pipe extends from the center of the circular area to the outside, and the plurality of soot blowing pipes are equidistantly distributed.

[0013] In a preferred embodiment, the driving member comprises a gear ring outside the plurality of soot blowing pipes, a gear engaged with the gear ring, and a driving motor for driving the gear to rotate.

[0014] In a preferred embodiment, the flow equalizing member comprises a flow equalizing plate, and the flow equalizing plate is uniformly provided with a plurality of flow equalizing holes.

[0015] The beneficial effects of the technical scheme of the utility model are as follows:

[0016] The main structure one and the main structure two are convenient for installation and disassembly and maintenance of internal elements, the components are compact in structure, and the use requirements of ship exhaust treatment are met. The soot blowing assembly is arranged to regularly blow the dust in the SCR catalyst module, the internal pores of the SCR catalyst module are prevented from being blocked, and the exhaust treatment effect and efficiency are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model,

[0018] Figure 2 It is an internal structure schematic view of the utility model,

[0019] Figure 3 It is a soot blowing assembly and SCR catalyst module structure schematic view of the utility model,

[0020] Figure 4Another view of the blowing ash assembly and the SCR catalyst module structure schematic diagram of the utility model.

[0021] Mark explanation: 1 main structure one, 2 main structure two, 3 front end soot filter, 4 flow equalizing plate, 5 flow equalizing hole, 6 blowing ash assembly, 7 air inlet pipe, 8 flow guide pipe, 9 blowing ash pipe, 10 blowing ash nozzle, 11 gear ring, 12 gear, 13 drive motor, 14 SCR catalyst module, 15 buffer sleeve, 16 rear end soot filter, 17 pressure sensor, 18 temperature sensor, 19 access door, 20 base, 21 air inlet, 22 air outlet. DETAILED DESCRIPTION

[0022] The utility model makes further detailed explanation in combination with the drawings and specific implementation. The embodiment of the utility model is given for example and description, and is not exhaustive or limit the utility model to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The embodiment is selected and described to better illustrate the principle and practical application of the utility model, and enable those skilled in the art to understand the utility model to design various embodiments with various modifications suitable for specific purposes.

[0023] As Figures 1-4 The utility model discloses a ship exhaust SCR denitration reactor, including main structure, the front end soot filter 3 of being located in the main structure and being set gradually along the gas flow direction, flow equalizing piece, blowing ash assembly 6, SCR catalyst module group 14 and rear end soot filter 16, the main structure bottom is provided with base 20. The exhaust gas of ship engine enters the reactor from air inlet 21, after filtering out soot by the front end soot filter 3, passes through flow equalizing piece even airflow, and exhaust gas is evenly distributed in SSCR catalyst module group 14, after catalytic decomposition of catalyst, after decomposition exhaust gas filters again by rear end soot filter 16, and finally is discharged from air outlet 22. The pressure sensor 17 and temperature sensor 18 set up on the main structure are used for real-time monitoring the gas pressure and temperature in the main structure, and guarantee the reaction safety to carry out.

[0024] The main structure includes the main structure one 1 and the main structure two 2 of symmetric setting, the main structure one 1 and the main structure two 2 are fixed to each other, and the SCR catalyst module group 14 is positioned by the main structure one 1 and the main structure two 2. The main structure one 1 and the main structure two 2 all are provided with SCR catalyst module group 14 socket, and the two sides of SCR catalyst module group 14 are inserted into the main structure one 1 and the main structure two 2 respectively, and the two ends are respectively with the inside of the main structure one 1 and the main structure two 2. The SCR catalyst module group 14 is provided with buffer sleeve 15 outside.

[0025] In the above scheme, the SCR catalyst module 14 is provided with honeycomb channels and a surface coated with a catalyst for contact reaction with exhaust gas to degrade the exhaust gas into safe emission gas. The buffer sleeve 15 is arranged outside the SCR catalyst module 14 to avoid damage to the outside of the SCR catalyst module 14 during fixing, and to ensure the fit of the outside of the SCR catalyst module 14 with the inner walls of the main structure one 1 and the main structure two 2, avoiding the outflow of uncleaned gas. The main structure one 1 and the main structure two 2 are fixed to each other by bolts, and a sealing gasket can be added between them to maintain the air tightness of the connection.

[0026] The front-end soot filter 3 and the rear-end soot filter 16 both have the function of filtering soot in gas, and can use filter screens or cloth bag dust collectors in existing structures. The flow equalizing member includes a flow equalizing plate 4, and the flow equalizing plate 4 is uniformly provided with a plurality of flow equalizing holes 5. After being filtered by the front-end soot filter 3, the waste gas passes through the flow equalizing holes 5 on the flow equalizing plate 4, and after being dispersed by the flow equalizing holes 5, the gas uniformly enters the channels of the SCR catalyst module 14, avoiding uneven gas distribution and affecting the treatment effect.

[0027] Although the front-end soot filter 3 can filter most of the soot, some soot will still enter the SCR catalyst module 14, and if not cleaned in time, it will block the channels of the SCR catalyst module 14, thereby affecting the waste gas treatment effect and efficiency, so the soot blowing assembly 6 is arranged to periodically clean the dust in the channels of the SCR catalyst module 14.

[0028] The soot blowing assembly 6 includes a blowing member arranged opposite to the SCR catalyst module 14 and a driving member for driving the blowing member to rotate. The driving member can drive the blowing member to rotate, avoiding the occurrence of cleaning dead angles, and the blowing member is connected to a gas supply device to supply high-pressure gas.

[0029] The blowing member includes an air inlet pipe 7, a flow guide pipe 8 rotatably connected to the air inlet pipe 7, a plurality of soot blowing pipes 9 connected to the flow guide pipe 8, a plurality of soot blowing nozzles 10 equidistantly arranged on the soot blowing pipes 9 along the length direction of the soot blowing pipes 9, and the soot blowing nozzles 10 are directed towards the SCR catalyst module 14. A plurality of the soot blowing pipes 9 are in the same circular area, each of the soot blowing pipes 9 extends from the center of the circular area to the outside, and a plurality of the soot blowing pipes 9 are equidistantly distributed.

[0030] In the above scheme, the gas enters the flow guide pipe 8 through the gas inlet pipe 7, and then enters the soot blowing pipe 9 from the flow guide pipe 8, and finally is blown to the SCR catalyst module 14 by the nozzle on the soot blowing pipe 9 to clean the dust in the hole of the SCR catalyst module 14. The equidistantly arranged soot blowing pipes 9 can rotate at a uniform speed under the driving of the driving member, thereby ensuring that the holes on the SCR catalyst module 14 can be swept at the same time, and the high-pressure gas can effectively remove the dust in the holes.

[0031] The driving member comprises a gear ring 11 located outside the soot blowing pipes 9, a gear 12 engaged with the gear ring 11, and a driving motor 13 for driving the gear 12 to rotate. The gear ring 11 is provided with a limiting block outside, which is inserted into the limiting ring channel provided in the main body structure 1 to ensure stable rotation of the gear ring 11. In order to ensure the blowing effect, the rotation speed should not be too fast, for example, it takes 1 minute for the soot blowing pipe 9 to rotate one circle. The specific rotation speed is set according to the use condition, and the dust after blowing can be collected through the maintenance opening.

[0032] The main body structure 1 and the main body structure 2 are provided to facilitate the installation and disassembly and maintenance of the internal elements, and the components are compact in structure, meeting the use requirements of ship exhaust treatment. The soot blowing assembly is provided to regularly blow the dust in the holes of the SCR catalyst module 14, avoiding the blockage of the internal holes of the SCR catalyst module 14, and ensuring the exhaust treatment effect and efficiency.

[0033] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the scope of protection of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A marine exhaust SCR denitration reactor, characterized by: The main body structure comprises a front-end dust filter, a flow equalizing member, a soot blowing assembly, an SCR catalyst module and a rear-end dust filter arranged in sequence along the gas flow direction in the main body structure; The main body structure comprises a main body structure one and a main body structure two arranged symmetrically, the main body structure one and the main body structure two are fixed to each other, and the SCR catalyst module is positioned by the main body structure one and the main body structure two. The soot blowing assembly comprises a blowing member arranged opposite to the SCR catalyst module and a driving member for driving the blowing member to rotate.

2. A marine exhaust SCR denitration reactor according to claim 1, characterized in that: The main body structure one and the main body structure two are both provided with an SCR catalyst module insertion opening, the SCR catalyst module is inserted into the main body structure one and the main body structure two respectively at two sides, and the two ends are respectively abutted with the inside of the main body structure one and the main body structure two.

3. A marine exhaust SCR denitration reactor according to claim 1, characterized in that: The SCR catalyst module is externally provided with a buffer sleeve.

4. The marine exhaust SCR denitration reactor according to claim 1, characterized in that: The blowing member comprises an air inlet pipe, a flow guide pipe rotationally connected with the air inlet pipe, a plurality of soot blowing pipes connected with the flow guide pipe, a plurality of soot blowing nozzles equidistantly arranged on the soot blowing pipes along the length direction of the soot blowing pipes, and the soot blowing nozzles are directed towards the SCR catalyst module.

5. A marine exhaust SCR denitration reactor according to claim 4, characterized in that: The plurality of soot blowing pipes are in the same circular area, each of the soot blowing pipes extends from the center of the circular area to the outside, and the plurality of soot blowing pipes are equidistantly distributed.

6. A marine exhaust SCR denitration reactor according to claim 4, characterized in that: The driving member comprises a gear ring outside the plurality of soot blowing pipes, a gear engaged with the gear ring, and a driving motor for driving the gear to rotate.

7. A marine exhaust SCR denitration reactor according to claim 1, characterized in that: The flow equalizing member comprises a flow equalizing plate, and a plurality of flow equalizing holes are uniformly distributed on the flow equalizing plate.

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