Boiler flue gas water seal and flue gas condensate water discharging device

Abstract

The utility model discloses a boiler flue gas water seal and flue gas condensate water discharge device, which relates to the technical field of boiler flue gas discharge in the heat supply industry and comprises a water return bent pipe and a flue gas filter, one end of the water return bent pipe is used for being connected with a boiler flue gas condensate water discharge port, and the other end of the water return bent pipe is used for being connected with a boiler flue gas condensate water discharge port. One end of the water return bent pipe is used for being connected with an inlet of the flue gas filter, the other end of the water return bent pipe is used for being connected with an inlet of the flue gas filter, a blocking plate is arranged at the inlet of the flue gas filter, the blocking plate can block the inlet of the flue gas filter when flue gas is sucked back, the flue gas filter is used for containing water, and an overflow port of the flue gas filter is used for being connected with a drainage ditch. The boiler flue gas water seal and flue gas condensate water discharging device can filter water-soluble poisonous gas such as nitrogen oxide NOx and sulfur dioxide in flue gas, stably and efficiently discharge condensate water, and meanwhile, the situation that the flue gas is discharged into a boiler room along with the condensate water to cause harm to production personnel is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler flue gas emission in the heating industry, in particular to a boiler flue gas water seal and a flue gas condensate discharge device. Background Technique

[0002] The nitrogen oxides in boiler flue gas are highly harmful, and the flue gas is also doped with toxic gases such as sulfur dioxide.

[0003] The traditional boiler flue condensate trap (U-shaped water seal) cannot completely block the boiler flue gas, and the boiler flue gas will be discharged together with the condensate. Each time the boiler starts and runs for half an hour, enough condensate will be generated to block the U-shaped water seal. Before that, the flue gas will always be discharged into the boiler room through the condensate drain port. In addition, if multiple boilers share a flue, there will be individual boilers with too high back pressure, and the flue gas will be directly discharged from the condensate pipes at the front or rear of the boiler, and the traditional water seal simply cannot block it. Content of the Utility Model

[0004] The purpose of the utility model is to provide a boiler flue gas water seal and a flue gas condensate discharge device, which can filter the toxic gases such as nitrogen oxides NOx and sulfur dioxide that are easily soluble in water in the flue gas, stably and efficiently discharge the condensate, and at the same time avoid the harm caused by the flue gas being discharged into the boiler room along with the condensate to the production personnel.

[0005] To achieve the above purpose, the utility model provides the following scheme:

[0006] The utility model provides a boiler flue gas water seal and a flue gas condensate discharge device, including: a trap pipe and a flue gas filter. One end of the trap pipe is used to connect with the boiler flue gas condensate drain port, the other end of the trap pipe is used to connect with the inlet of the flue gas filter. A plug plate is arranged at the inlet of the flue gas filter, and the plug plate can block the inlet of the flue gas filter when the flue gas is sucked back. Water is used to be contained in the flue gas filter, and the overflow port of the flue gas filter is used to connect with the drainage ditch.

[0007] Preferably, the trap pipe includes a first connection part, a second connection part and a third connection part which are connected in sequence. The first connection part and the second connection part are both U-shaped. The U-shaped opening of the first connection part is arranged upwards, the U-shaped opening of the second connection part is arranged downwards. The first connection part is also connected with the boiler flue gas condensate drain port, and the third connection part is used to connect with the inlet of the flue gas filter.

[0008] Preferably, the distance between the projection of the center line of the boiler flue gas condensate drain port on the vertical plane and the projection of the center line of the cross section at the highest position of the second connection part on the vertical plane is a, and a is greater than zero.

[0009] Preferably, the distance between the projection of the center line of the cross-section at the highest position of the second connecting part on the vertical plane and the projection of the center line of the cross-section at the lowest position of the first connecting part on the vertical plane is b, and b is greater than zero.

[0010] Preferably, the distance between the projection of the center line of the cross-section at the lowest position of the first connecting part on the vertical plane and the projection of the center line of the overflow port of the flue gas filter on the vertical plane is c, and c is greater than zero.

[0011] Preferably, the distance between the projection of the center line of the inlet in the flue gas filter on the vertical plane and the projection of the center line of the overflow port of the flue gas filter on the vertical plane is d, and d is greater than zero.

[0012] Preferably, a float ball is arranged in the flue gas filter, the plug plate is hinged to the inner wall of the flue gas filter, and the float ball is connected to the plug plate.

[0013] Preferably, the flue gas filter is provided with a splash-proof cover.

[0014] Preferably, the anti-water trap and the flue gas filter are connected by a connecting pipe, the connecting pipe is horizontally arranged, and the connecting pipe is made of a transparent material.

[0015] Preferably, the connecting pipe is a flexible pipe.

[0016] The present utility model has achieved the following technical effects compared with the prior art:

[0017] The present utility model can effectively discharge the condensed water generated by boiler combustion. The flue gas filter can filter toxic gases such as nitrogen oxides NOx and sulfur dioxide that are easily soluble in water in the flue gas, and at the same time prevent the flue gas from being discharged into the boiler room along with the condensed water and causing harm to production personnel, and can also prevent the condensed water from flowing back and corroding the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic application diagram of the boiler flue gas water seal and flue gas condensed water discharge device of the present utility model;

[0020] Figure 2 It is a schematic diagram of the boiler flue gas water seal and flue gas condensed water discharge device of the present utility model;

[0021] Figure 3Top view of the flue gas filter and connecting pipe of the present utility model;

[0022] Figure 4 Side view of the flue gas filter of the present utility model;

[0023] In the figure: 1 - Boiler flue gas condensate drain outlet, 2 - Reverse elbow, 3 - Flue gas filter, 4 - Inlet, 5 - Plug plate, 6 - Splash guard, 7 - Floating ball, 8 - First connection part, 9 - Second connection part, 10 - Third connection part, 11 - Overflow water outlet, 12 - Connecting pipe, 13 - Boiler. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] The purpose of the present utility model is to provide a boiler flue gas water seal and flue gas condensate discharge device, which can filter toxic gases such as nitrogen oxides NOx and sulfur dioxide that are easily soluble in water in the flue gas, stably and efficiently discharge the condensate, and at the same time prevent the flue gas from being discharged into the boiler room along with the condensate and causing harm to production personnel.

[0026] To make the above objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0027] As Figures 1 to 4 shown, this embodiment provides a boiler flue gas water seal and flue gas condensate discharge device, including: a reverse elbow 2 and a flue gas filter 3. One end of the reverse elbow 2 is used to connect with the boiler flue gas condensate drain outlet 1, and the other end of the reverse elbow 2 is used to connect with the inlet 4 of the flue gas filter 3. A plug plate 5 is provided at the inlet 4 of the flue gas filter 3, and the plug plate 5 can block the inlet 4 of the flue gas filter 3 when the flue gas is sucked back. The flue gas filter 3 is used to hold water, and the overflow water outlet 11 of the flue gas filter 3 is used to connect with the drainage ditch. This embodiment can effectively discharge the condensate generated by the combustion of the boiler 13. The flue gas filter 3 can filter toxic gases such as nitrogen oxides NOx and sulfur dioxide that are easily soluble in water in the flue gas, and at the same time prevent the flue gas from being discharged into the boiler 13 room along with the condensate and causing harm to production personnel, and can also prevent the condensate from flowing back and corroding the boiler 13.

[0028] Specifically, in this embodiment, a splash guard 6 is provided at the top of the flue gas filter 3. The splash guard 6 is hinged to the flue gas filter 3. A float ball 7 is provided inside the flue gas filter 3. The plug plate 5 is hinged to the inner wall of the flue gas filter 3. The float ball 7 is connected to the plug plate 5. When discharging condensed water normally, the float ball 7 floats up, driving the plug plate 5 to open, realizing the opening of the inlet 4, and the condensed water can enter the flue gas filter 3.

[0029] In this embodiment, the water trap 2 includes a first connecting portion 8, a second connecting portion 9, and a third connecting portion 10 connected in sequence. Both the first connecting portion 8 and the second connecting portion 9 are U-shaped. The U-shaped opening of the first connecting portion 8 is arranged upward, and the U-shaped opening of the second connecting portion 9 is arranged downward. The first connecting portion 8 is also connected to the boiler flue gas condensed water discharge port 1, and the third connecting portion 10 is used to connect to the inlet 4 of the flue gas filter 3.

[0030] In this embodiment, the distance between the projection of the center line of the boiler flue gas condensed water discharge port 1 on the vertical plane and the projection of the center line of the cross-section at the highest position of the second connecting portion 9 on the vertical plane (i.e., the water level height difference between the boiler flue gas condensed water discharge port 1 and the highest position of the second connecting portion 9) is a, and a is greater than zero; the distance between the projection of the center line of the cross-section at the highest position of the second connecting portion 9 on the vertical plane and the projection of the center line of the cross-section at the lowest position of the first connecting portion 8 on the vertical plane is b (i.e., the water level height difference between the highest position of the second connecting portion 9 and the lowest position of the first connecting portion 8), and b is greater than zero; the distance between the projection of the center line of the cross-section at the lowest position of the first connecting portion 8 on the vertical plane and the projection of the center line of the overflow port of the flue gas filter 3 on the vertical plane is c (i.e., the water level height difference between the lowest position of the first connecting portion 8 and the overflow port of the flue gas filter 3), and c is greater than zero; the distance between the projection of the center line of the inlet 4 inside the flue gas filter 3 on the vertical plane and the projection of the center line of the overflow port of the flue gas filter 3 on the vertical plane is d (i.e., the water level height difference between the overflow port of the flue gas filter 3 and the inlet 4 inside the flue gas filter 3), and d is greater than zero.

[0031] In this embodiment, a, b, c, and d are all greater than 0 to ensure that the condensed water is discharged smoothly according to the elevation and will not be blocked and stagnant. Adding water with a height of d to the flue gas boiler 13 before starting the boiler 13 will block the flue gas immediately and play a 100% water seal role.

[0032] In this embodiment, the third connection part 10 of the water return elbow 2 and the inlet 4 of the flue gas filter 3 are connected through a connecting pipe 12, one end of the connecting pipe 12 is sleeved on the outside of the interface of the third connection part 10, and the other end of the connecting pipe 12 is sleeved on the outside of the pipeline at the inlet 4 of the flue gas filter 3. The connecting pipe 12 is arranged horizontally, and the connecting pipe 12 is a hose made of plastic material, and the connecting pipe 12 is made of transparent material. The presence of impurities in the condensed water and the discharge of the condensed water can be observed through the connecting pipe 12; in case of abnormal discharge, that is, when the flue gas of the boiler 13 is sucked back for some reason, the connecting pipe 12 will be sucked flat or disconnected from the flue gas filter 3, slowly preventing the condensed water from flowing back, and at the same time, the liquid level of the flue gas filter 3 drops, and the float 7 drops with the liquid level, and the plugging plate 5 immediately blocks the inlet 4 of the flue gas filter 3 to avoid backflow, forming a double insurance.

[0033] When the boiler flue gas water seal and flue gas condensate discharge device of this embodiment is used, water is added to the flue gas filter 3 to a height of d before the boiler 13 produces condensate. The added water can well block the flue gas before the boiler 13 is started. If flue gas is discharged from the water, nitrogen oxides NOx, sulfur dioxide and other toxic gases that are easily soluble in water in the flue gas will also be absorbed and filtered out to avoid harm to production and operation personnel. The flue gas filter 3 is connected to the boiler 13 by using the connecting pipe 12 and the water return bend pipe 2. The condensate enters the flue gas filter 3 through the water return bend pipe 2 and the connecting pipe 12 and mixes with water. The water level continues to rise to the overflow port 11 and is discharged into the ditch; the connecting pipe 12 can be automatically flattened or disconnected to block water backflow when the boiler 13 surges and sucks back the condensate. At the same time, the float 7 at the bottom of the flue gas filter 3 drops as the liquid level drops, and the blocking plate 5 blocks the inlet 4 of the flue gas filter 3, thereby preventing the condensate from being sucked back into the furnace for a second time. Under normal operation, the flue gas discharged from the boiler 13 during surge may occasionally splash out condensed water, and the splash guard 6 can play a good isolation role and prevent external debris from falling into the flue gas filter 3 and causing blockage.

[0034] This embodiment, combined with the water seal effect of the traditional water return elbow 2, can effectively solve the flue gas water seal problem of the high back pressure boiler 13; the water is contained in the flue gas filter 3, which has a larger water storage capacity than the traditional water seal, and can greatly filter the nitrogen oxides in the flue gas, so that the nitrogen oxides are decomposed into nitric acid and nitrous acid. At the same time, toxic gases that are easily soluble in water, such as sulfur dioxide, are decomposed to avoid endangering the safety of production personnel in the boiler room 13; the dual design of the connecting pipe 12 and the blocking plate 5 can effectively prevent the surge of the boiler 13 and other reasons from causing the back suction of condensed water, causing the three-way condensed water corrosion of the boiler 13 to enter the local area.

[0035] In this utility model, specific examples are used to elaborate on the principle and implementation manner of the utility model. The description of the above embodiments is only used to help understand the method and its core idea of the utility model; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on the utility model.

Claims

1. A boiler flue gas water seal and flue gas condensate discharge device, characterized in that: include: A water return elbow and a flue gas filter, one end of the water return elbow is used to be connected to the boiler flue gas condensate outlet, and the other end of the water return elbow is used to be connected to the inlet of the flue gas filter. The inlet of the flue gas filter is provided with a blocking plate, which can block the inlet of the flue gas filter when the flue gas is back-sucked. The flue gas filter is used to hold water, and the overflow outlet of the flue gas filter is used to be connected to the drain ditch.

2. The boiler flue gas water seal and flue gas condensate discharge device according to claim 1, characterized in that: The reverse water bend pipe includes a first connection part, a second connection part and a third connection part which are connected in sequence, the first connection part and the second connection part are both U-shaped, the U-shaped opening of the first connection part is arranged upward, and the U-shaped opening of the second connection part is arranged downward, the first connection part is also connected to the boiler flue gas condensate outlet, and the third connection part is used to connect to the inlet of the flue gas filter.

3. The boiler flue gas water seal and flue gas condensate discharge device according to claim 2, characterized in that: The distance between the projection of the center line of the boiler flue gas condensate outlet on the vertical plane and the projection of the center line of the cross section at the highest position of the second connecting part on the vertical plane is a, and a is greater than zero.

4. The boiler flue gas water seal and flue gas condensate discharge device according to claim 2, characterized in that: A distance between a projection of a center line of a cross section at a highest position of the second connection portion on a vertical plane and a projection of a center line of a cross section at a lowest position of the first connection portion on a vertical plane is b, and b is greater than zero.

5. The boiler flue gas water seal and flue gas condensate discharge device according to claim 2, characterized in that: The distance between the projection of the center line of the cross section at the lowest position of the first connecting portion on the vertical plane and the projection of the center line of the overflow port of the smoke filter on the vertical plane is c, and c is greater than zero.

6. The boiler flue gas water seal and flue gas condensate discharge device according to claim 2, characterized in that: The distance between the projection of the center line of the inlet in the smoke filter on the vertical plane and the projection of the center line of the overflow port of the smoke filter on the vertical plane is d, and d is greater than zero.

7. The boiler flue gas water seal and flue gas condensate discharge device according to claim 1, characterized in that: A floating ball is arranged in the smoke filter, the blocking plate is hinged to the inner wall of the smoke filter, and the floating ball is connected to the blocking plate.

8. The boiler flue gas water seal and flue gas condensate discharge device according to claim 1, characterized in that: The smoke filter is provided with a splash shield.

9. The boiler flue gas water seal and flue gas condensate discharge device according to claim 1, characterized in that: The water return elbow and the smoke filter are connected via a connecting pipe, the connecting pipe is horizontally arranged, and the connecting pipe is made of a transparent material.

10. The boiler flue gas water seal and flue gas condensate discharge device according to claim 9, characterized in that: The connecting pipe is a hose.

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