Marine internal combustion engine tail gas denitration tower

Abstract

The utility model discloses a ship internal combustion engine tail gas denitration tower which comprises a base, a liquid storage tank is fixedly connected to the base, a denitration mechanism is arranged on the liquid storage tank, the denitration mechanism comprises supporting pieces welded to the top end of the liquid storage tank at equal intervals, a first-stage denitration tower is welded to the supporting pieces, and a second-stage denitration tower is welded to the first-stage denitration tower. The first-stage denitration tower is fixedly connected with the second-stage denitration tower through a fixing piece, annular pipes are fixedly connected to the inner surfaces of the first-stage denitration tower and the second-stage denitration tower, nozzles are welded to the inner surfaces of the annular pipes at equal intervals, the nozzles on the annular pipes in the first-stage denitration tower atomize a denitration solution, and the nozzles on the annular pipes in the second-stage denitration tower atomize the denitration solution. The atomized denitration solution is fully combined with the tail gas, then the tail gas is subjected to denitration treatment, the denitrated gas flows into the second-stage denitration tower through the communicating pipe, the denitration solution is sprayed by the nozzles in the second-stage denitration tower and is fully combined with the denitrated gas, so that the tail gas which is not denitrated is subjected to denitration treatment, and the denitration effect is further improved.

Description

Technical Field

[0001] The utility model relates to the treatment of exhaust gas from a ship internal combustion engine, in particular to a denitration tower for exhaust gas from a ship internal combustion engine. Background Art

[0002] With the development of international trade and shipping, the exhaust gas emissions from ships fueled by petroleum products are becoming more and more serious. According to the data provided by Norway to the International Maritime Organization, the total amount of particulate pollutants emitted by global marine ships each year is equivalent to half of the particulate pollutants emitted by global cars. 30% of the nitrogen oxides emitted each year in the world come from marine ships, and sulfur oxides account for about 4% of the world's total emissions. Air pollution from ships has reached a point that cannot be ignored, especially in ports, straits and some sea areas with dense routes and large ship traffic. Exhaust gas emitted by ships has even become the main source of pollution in the area. As countries around the world pay more and more attention to environmental protection, the pollution of ship exhaust emissions has also attracted more and more attention.

[0003] At present, the existing ship internal combustion engine exhaust gas treatment requires the use of a denitrification tower. The exhaust gas enters the denitrification tower through the air intake pipe. At the same time, a denitrification solution is added to the denitrification tower to allow the denitrification solution and the exhaust gas to fully react in the denitrification tower to denitrify the exhaust gas. The existing denitrification tower makes the reaction effect between the two unsatisfactory, further affecting the effect of exhaust gas denitrification. Utility Model Content

[0004] In view of the problems in the related technology, the utility model proposes a ship internal combustion engine exhaust gas denitrification tower to overcome the above technical problems existing in the existing related technology.

[0005] To this end, the specific technical solutions adopted by the utility model are as follows:

[0006] A ship internal combustion engine exhaust denitrification tower, comprising a base, a liquid storage tank fixedly connected to the base, a liquid injection pipe welded on one side of the outer surface of the liquid storage tank, a denitrification mechanism provided on the liquid storage tank, the denitrification mechanism comprising a support member welded on the top of the liquid storage tank at an equal distance, an end of the support member away from the liquid storage tank is fixedly connected to a primary denitrification tower, the primary denitrification tower is fixedly connected to a secondary denitrification tower through a fixing member, an annular pipe is fixedly connected on the inner surfaces of the primary denitrification tower and the secondary denitrification tower, nozzles are welded on the inner surfaces of the annular pipe at equal distances, filters are fixedly connected to the bottoms of the inner surfaces of the primary denitrification tower and the secondary denitrification tower, an air inlet pipe is welded on the bottom end of the inner surface of the primary denitrification tower away from the annular pipe, an air outlet pipe is welded on the top of the secondary denitrification tower, a drain pipe is welded on the bottom ends of the primary denitrification tower and the secondary denitrification tower, a valve is provided on the drain pipe, and a circulation mechanism is provided on the primary denitrification tower and the secondary denitrification tower.

[0007] Furthermore, in order to circulate the denitrification solution, the circulation mechanism includes liquid outlet water pipes respectively welded on the outer surfaces of the primary denitrification tower and the secondary denitrification tower, the liquid outlet water pipes are interconnected through liquid outlet pipes, one end of the liquid outlet pipe is fixedly connected to the liquid storage tank, and a water pump is fixedly connected to the other end of the outer surface of the liquid storage tank. The water pump is connected to the liquid storage tank through a connecting pipe, and a liquid inlet pipe is fixedly provided on the output end of the water pump.

[0008] Furthermore, in order to allow the denitrification solution to flow into the annular tube, a liquid inlet pipe is welded on one end of the outer surface of the annular tube, one end of the liquid inlet pipe extends to the outside of the primary denitrification tower and the secondary denitrification tower respectively, and is fixedly connected to the liquid inlet pipe.

[0009] Furthermore, in order to improve the effect of exhaust gas denitrification, connecting pipes are welded at equal distances on the inner surface of the first-level denitrification tower away from the top of the annular tube, and one end of the connecting pipes extends outside the first-level denitrification tower and is fixedly connected to the second-level denitrification tower.

[0010] Furthermore, in order to recycle the filtered denitration solution, the liquid outlet water pipe is respectively interconnected with the primary denitration tower and the secondary denitration tower, and is located at the bottom of the filter.

[0011] Furthermore, in order to facilitate checking the depth of the denitration solution in the liquid storage tank, a scale ruler is fixedly connected to one end of the outer surface of the liquid storage tank away from the injection pipe.

[0012] Furthermore, in order to stabilize the base on the ground, support legs are welded at equal distances on the bottom end of the base.

[0013] The beneficial effects of the utility model are:

[0014] 1. Exhaust gas enters the primary denitrification tower through the air intake pipe. The nozzle on the annular pipe in the primary denitrification tower atomizes the denitrification solution. The atomized denitrification solution is fully combined with the exhaust gas to denitrify the exhaust gas. The denitrified gas is mixed with undenitrated exhaust gas. At this time, the denitrified gas will flow to the secondary denitrification tower through the connecting pipe. The nozzle in the secondary denitrification tower will spray the denitrification solution and fully combine with the denitrified gas to denitrify the undenitrated exhaust gas, thereby further improving the denitrification effect.

[0015] 2. The denitrification solution in the liquid storage tank flows to the liquid inlet pipe under the action of the water pump, and the denitrification solution in the liquid inlet pipe flows to the annular pipes in the primary denitrification tower and the secondary denitrification tower respectively through the liquid inlet water pipe, and the denitrification solution is atomized through the nozzles on the annular pipes, and the atomized denitrification solution is fully combined with the exhaust gas to denitrify the exhaust gas, and the excess denitrification solution and impurities generated during the reaction will be mixed together and fall to the bottom of the primary denitrification tower and the secondary denitrification tower. By providing a filter in the primary denitrification tower and the secondary denitrification tower, the impurities in the denitrification solution will be filtered, and the filtered denitrification solution will flow to the liquid outlet water pipe, and the denitrification solution in the liquid outlet water pipe will flow to the liquid storage tank through the liquid outlet pipe, so that the denitrification solution can be recycled, further reducing the waste of the denitrification solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic structural diagram of a ship internal combustion engine exhaust denitration tower according to an embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional view of a denitration tower for exhaust gas from a ship internal combustion engine according to an embodiment of the utility model;

[0019] Figure 3 The utility model is a schematic structural diagram of an annular tube in a denitration tower for exhaust gas from a ship internal combustion engine according to an embodiment of the utility model.

[0020] In the figure:

[0021] 1. Base; 2. Liquid storage tank; 3. Liquid injection pipe; 4. Connecting pipe; 5. Water pump; 6. Liquid inlet pipe; 7. Liquid inlet water pipe; 8. Annular pipe; 9. Nozzle; 10. Liquid outlet water pipe; 11. Liquid outlet pipe; 12. Scale ruler; 13. Support; 14. Primary denitrification tower; 15. Air inlet pipe; 16. Connecting pipe; 17. Fixing part; 18. Secondary denitrification tower; 19. Filter; 20. Air outlet pipe; 21. Liquid discharge pipe; 22. Valve; 23. Support leg. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] According to an embodiment of the utility model, a denitration tower for exhaust gas from a ship internal combustion engine is provided.

[0024] Embodiment 1;

[0025] like Figure 1-Figure 3As shown, according to an embodiment of the utility model, the ship internal combustion engine exhaust denitrification tower includes a base 1 for supporting the denitrification tower, the bottom end of the base 1 is welded with support legs 23 at equal distances, and the end of the support legs 23 away from the base 1 is fixedly connected with an anti-skid rubber support, a liquid storage tank 2 is welded on the base 1, and a liquid injection pipe 3 is welded on one side of the outer surface of the liquid storage tank 2, and a denitrification solution is added into the liquid storage tank 2 through the liquid injection pipe 3, and a scale ruler 12 is provided on one side of the outer surface of the liquid storage tank 2 away from the liquid injection pipe 3. The liquid storage tank 2 is provided with a denitrification mechanism, and the denitrification mechanism includes equidistantly welded on the top of the liquid storage tank 2 The support member 13 is mounted on the end, and the end of the support member 13 away from the liquid storage tank 2 is fixedly connected to the primary denitration tower 14, and the primary denitration tower 14 is fixedly connected to the secondary denitration tower 18 through a fixing member 17. An outlet pipe 20 is welded on the top of the secondary denitration tower 18, and an annular pipe 8 is welded on the inner surface of the primary denitration tower 14 and the secondary denitration tower 18, and nozzles 9 are welded on the inner surface of the annular pipe 8 at equal distances. A filter screen 19 is fixedly connected to the bottom of the inner surface of the primary denitration tower 14 and the secondary denitration tower 18, and an inlet pipe 1 is welded on the bottom of the inner surface of the primary denitration tower 14 away from the annular pipe 8. 5. One end of the air intake pipe 15 extends to the outside of the primary denitration tower 14 and is connected to the tail gas end. The air intake pipe 15 is fixedly arranged between the annular pipe 8 and the filter screen 19 in the primary denitration tower 14. A connecting pipe 16 is welded at an equal distance on the top of the inner surface of the primary denitration tower 14 away from the annular pipe 8. One end of the connecting pipe 16 extends to the outside of the primary denitration tower 14 and is fixedly connected to the secondary denitration tower 18. The connecting pipe 16 is between the annular pipe 8 and the filter screen 19 in the secondary denitration tower 18. A drain pipe 21 is welded on the bottom ends of the primary denitration tower 14 and the secondary denitration tower 18. The drain pipe A valve 22 is provided on 21, and the exhaust gas enters the primary denitrification tower 14 through the air inlet pipe 15. The nozzle 9 on the annular pipe 8 in the primary denitrification tower 14 atomizes the denitrification solution, and the atomized denitrification solution is fully combined with the exhaust gas, thereby denitrifying the exhaust gas. The denitrified gas is mixed with the exhaust gas that has not been denitrified. At this time, the denitrified gas will flow to the secondary denitrification tower 18 through the connecting pipe 16. The nozzle 9 in the secondary denitrification tower 18 will spray the denitrification solution, and fully combine with the denitrified gas, so that the exhaust gas that has not been denitrified will be denitrified, thereby further improving the denitrification effect.

[0026] Embodiment 2:

[0027] See also Figure 1-Figure 3In order to circulate the denitration solution, a circulation mechanism is provided on the primary denitration tower 14 and the secondary denitration tower 18, and the circulation mechanism includes a liquid outlet pipe 10 respectively welded on the outer surface of the primary denitration tower 14 and the secondary denitration tower 18, the liquid outlet pipe 10 is respectively interconnected with the primary denitration tower 14 and the secondary denitration tower 18, and is located at the bottom of the filter 19, and the liquid outlet pipes 10 are connected to each other through a liquid outlet pipe 11, one end of the liquid outlet pipe 11 is fixedly connected to the liquid storage tank 2, and a water pump 5 is fixedly connected to the other end of the outer surface of the liquid storage tank 2, and the water pump 5 is connected to the liquid storage tank 2 through a connecting pipe 4, and a liquid inlet pipe 6 is fixedly provided on the output end of the water pump 5, and a liquid inlet pipe 7 is welded on one end of the outer surface of the annular pipe 8, and one end of the liquid inlet pipe 7 extends to the outside of the primary denitration tower 14 and the secondary denitration tower 18, and is fixedly connected to the liquid inlet pipe 6, and the liquid storage tank 2 The denitrification solution in the denitrification tower 14 flows to the liquid inlet pipe 6 under the action of the water pump 5, and the denitrification solution in the liquid inlet pipe 6 flows to the annular pipe 8 in the primary denitrification tower 14 and the secondary denitrification tower 18 respectively through the liquid inlet water pipe 7, and the denitrification solution is atomized by the nozzle 9 on the annular pipe 8, and the atomized denitrification solution is fully combined with the tail gas to denitrify the tail gas, and the excess denitrification solution and impurities generated during the reaction will be mixed together and fall to the bottom of the primary denitrification tower 14 and the secondary denitrification tower 18. By providing a filter 19 in the primary denitrification tower 14 and the secondary denitrification tower 18, the impurities in the denitrification solution will be filtered, and the filtered denitrification solution will flow to the liquid outlet pipe 10, and the denitrification solution in the liquid outlet pipe 10 will flow to the liquid storage tank 2 through the liquid outlet pipe 11, so that the denitrification solution can be recycled, and the waste of the denitrification solution can be further reduced.

[0028] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0029] In actual application, first, the tail gas enters the primary denitrification tower 14 through the air intake pipe 15, and secondly, the denitrification solution in the liquid storage tank 2 flows to the liquid inlet pipe 6 under the action of the water pump 5, and the denitrification solution in the liquid inlet pipe 6 flows to the annular pipe 8 in the primary denitrification tower 14 and the secondary denitrification tower 18 respectively through the liquid inlet water pipe 7, and the nozzle 9 on the annular pipe 8 in the primary denitrification tower 14 atomizes the denitrification solution, and the atomized denitrification solution is fully combined with the tail gas, and then the tail gas is denitrified. The denitrified gas is mixed with the tail gas that has not been denitrified. At this time, the denitrified gas will flow to the secondary denitrification tower 18 through the connecting pipe 16, and the denitrification solution in the secondary denitrification tower 18 will be discharged from the secondary denitrification tower 18. The nozzle 9 will spray the denitrification solution and fully combine it with the denitrified gas, so that the exhaust gas that has not been denitrified will be denitrified, further improving the denitrification effect. The excess denitrification solution and impurities generated during the reaction will be mixed together and fall to the bottom of the first-level denitrification tower 14 and the second-level denitrification tower 18. By arranging a filter 19 in the first-level denitrification tower 14 and the second-level denitrification tower 18, the impurities in the denitrification solution will be filtered, and the filtered denitrification solution will flow into the liquid outlet pipe 10. The denitrification solution in the liquid outlet pipe 10 will flow into the liquid storage tank 2 through the liquid outlet pipe 11, thereby recycling the denitrification solution and further reducing the waste of the denitrification solution.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ship internal combustion engine exhaust gas denitrification tower, comprising a base (1), characterized in that: A liquid storage tank (2) is fixedly connected to the base (1), a liquid injection pipe (3) is welded to one side of the outer surface of the liquid storage tank (2), a denitration mechanism is provided on the liquid storage tank (2), and the denitration mechanism comprises a support member (13) welded to the top of the liquid storage tank (2) at an equal distance, an end of the support member (13) away from the liquid storage tank (2) is fixedly connected to a primary denitration tower (14), the primary denitration tower (14) is fixedly connected to a secondary denitration tower (18) via a fixing member (17), an annular tube (8) is fixedly connected to the inner surfaces of the primary denitration tower (14) and the secondary denitration tower (18), and the annular tube (8) 8) Nozzles (9) are welded at equal distances on the inner surface, filters (19) are fixedly connected to the bottom of the inner surfaces of the primary denitrification tower (14) and the secondary denitrification tower (18), an air inlet pipe (15) is welded to the bottom end of the inner surface of the primary denitrification tower (14) away from the annular tube (8), an air outlet pipe (20) is welded to the top of the secondary denitrification tower (18), a liquid discharge pipe (21) is welded to the bottom ends of the primary denitrification tower (14) and the secondary denitrification tower (18), a valve (22) is provided on the liquid discharge pipe (21), and a circulation mechanism is provided on the primary denitrification tower (14) and the secondary denitrification tower (18).

2. A ship internal combustion engine exhaust denitrification tower according to claim 1, characterized in that: The circulation mechanism comprises liquid outlet pipes (10) respectively welded on the outer surfaces of the primary denitrification tower (14) and the secondary denitrification tower (18); the liquid outlet pipes (10) are interconnected via a liquid outlet pipe (11); one end of the liquid outlet pipe (11) is fixedly connected to the liquid storage tank (2); a water pump (5) is fixedly connected to the other end of the outer surface of the liquid storage tank (2); the water pump (5) is connected to the liquid storage tank (2) via a connecting pipe (4); and a liquid inlet pipe (6) is fixedly provided on the output end of the water pump (5).

3. A ship internal combustion engine exhaust denitrification tower according to claim 2, characterized in that: A liquid inlet pipe (7) is welded to one end of the outer surface of the annular pipe (8), and one end of the liquid inlet pipe (7) extends to the outside of the primary denitrification tower (14) and the secondary denitrification tower (18), respectively, and is fixedly connected to the liquid inlet pipe (6).

4. A ship internal combustion engine exhaust denitrification tower according to claim 3, characterized in that: A connecting pipe (16) is welded at an equal distance on the inner surface of the primary denitrification tower (14) away from the top of the annular tube (8), and one end of the connecting pipe (16) extends outside the primary denitrification tower (14) and is fixedly connected to the secondary denitrification tower (18).

5. A ship internal combustion engine exhaust denitrification tower according to claim 2, characterized in that: The liquid outlet water pipe (10) is interconnected with the primary denitrification tower (14) and the secondary denitrification tower (18) respectively, and is located at the bottom of the filter screen (19).

6. A ship internal combustion engine exhaust denitrification tower according to claim 2, characterized in that: A scale ruler (12) is fixedly connected to one end of the outer surface of the liquid storage box (2) away from the liquid injection pipe (3).

7. A ship internal combustion engine exhaust denitrification tower according to claim 1, characterized in that: Support legs (23) are welded at equal distances on the bottom end of the base (1).

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