Steam condensate treatment device

Abstract

The utility model discloses a steam condensate treatment device, and belongs to the technical field of steam condensate discharge. The steam condensate treatment device in the embodiment of the utility model comprises a steam condensate pipeline and a seepage well which communicate with each other; the steam condensate pipeline is provided with a first end and a second end which are opposite to each other, the first end is connected with the steam pipeline, the seepage well comprises a well body, a heat preservation layer, a filtering layer and a seepage layer are arranged in the well body in the depth direction from a well mouth to a well bottom, the steam condensate pipeline partially penetrates through the heat preservation layer, and the second end is inserted into the filtering layer; water outlet holes are formed in the peripheral wall of the well body and correspond to the water seepage layer. The contact between steam condensate and cold energy can be reduced through the heat preservation layer in the seepage well, the steam condensate is prevented from being frozen and congealed, the steam condensate pipeline is prevented from being blocked, and water hammer accidents are avoided, meanwhile, the heat preservation layer and the filtering layer can play a good role in fixing and supporting the steam condensate pipeline, and the safety and reliability of steam condensate discharging are guaranteed.

Description

Technical Field

[0001] This application belongs to the technical field of steam condensate discharge, and particularly relates to a steam condensate treatment device. Background Art

[0002] After the steam transfers heat in the heat-using equipment, it cools and condenses into liquid water, which is called steam condensate. The temperature of steam condensate is generally higher than 100 degrees Celsius, and the sensible heat contained is equivalent to 10% - 30% of the total heat of the steam. As a by-product of the steam, it exists in the system along with the steam and needs to be designed to be discharged from the system. Currently, during the steam condensate discharge process, the steam condensate is prone to freezing and cannot be discharged smoothly and safely. Summary of the Utility Model

[0003] Purpose of the Utility Model: The embodiments of this application provide a steam condensate treatment device, aiming to overcome the technical problem that the current steam condensate is prone to freezing and cannot be safely discharged.

[0004] Technical Solution: The embodiments of this application disclose a steam condensate treatment device, including: a steam condensate pipeline and a soakaway pit connected to each other;

[0005] The steam condensate pipeline has opposite first and second ends. The first end is connected to the steam pipeline. The soakaway pit includes:

[0006] A well body. An insulating layer, a filtering layer, and a water-permeable layer are provided in the well body along the depth direction from the wellhead to the bottom of the well. Part of the steam condensate pipeline penetrates through the insulating layer, and the second end is inserted into the filtering layer. Water outlet holes are opened on the outer peripheral wall of the well body, and the water outlet holes are correspondingly arranged with the water-permeable layer.

[0007] In some embodiments, an adiabatic protection layer is provided on the part of the steam condensate pipeline located on the ground.

[0008] In some embodiments, the soakaway pit further includes a water-permeable layer, which surrounds the outer periphery of the well body and is correspondingly arranged with the water-permeable layer.

[0009] In some embodiments, the soakaway pit further includes:

[0010] A movable cover plate, which covers the wellhead;

[0011] A pressure relief pipe, part of which penetrates through the movable cover plate and communicates the inside and outside of the well body.

[0012] In some embodiments, the pressure relief pipe includes a first section and a second section connected to each other. The first section penetrates through the movable cover plate and communicates with the inside of the well body. The second section is horizontally arranged outside the well body, and the end is provided with an inclined opening.

[0013] In some embodiments, the bottom of the well body is an open structure.

[0014] In some embodiments, the processing device further includes a water outlet pipe, which is connected to the well body and is correspondingly arranged with the heat insulation layer. The water outlet pipe can discharge the steam condensate in the heat insulation layer to other processing devices.

[0015] In some embodiments, the infiltration well further includes a first isolation layer, which is made of a water-permeable material and is arranged between the filtering layer and the water infiltration layer.

[0016] In some embodiments, the infiltration well further includes a second isolation layer, which is made of a water-permeable material and is arranged on the outer peripheral wall of the well body and corresponds to the position of the water outlet hole.

[0017] In some embodiments, the processing device includes:

[0018] A plurality of steam condensate pipelines and infiltration wells, and the plurality of steam condensate pipelines are arranged at intervals.

[0019] In some embodiments, the inner diameter dimension D of the pipeline of the infiltration well satisfies 400mm ≤ D ≤ 1000mm.

[0020] In some embodiments, the steam condensate pipeline includes a first pipe, a second pipe and a third pipe. The second pipe is located between the first pipe and the third pipe and connects the first pipe and the third pipe. The arrangement direction of the second pipe intersects with the depth direction. The first pipe is connected to the steam pipeline, and the third pipe partially penetrates into the filtering layer;

[0021] The part of the third pipe located on the ground is provided with a gate valve and a steam trap.

[0022] Advantageous effects: A steam condensate processing device in an embodiment of the present application includes: a steam condensate pipeline and an infiltration well that are connected and communicate with each other; the steam condensate pipeline has opposite first and second ends, the first end is connected to the steam pipeline, and the infiltration well includes: a well body, and the inside of the well body is provided with a heat insulation layer, a filtering layer and a water infiltration layer along the depth direction from the wellhead to the bottom of the well. The steam condensate pipeline partially penetrates the heat insulation layer and the second end is inserted into the filtering layer. Water outlet holes are formed on the outer peripheral wall of the well body and correspond to the water infiltration layer. By providing the infiltration well and partially penetrating the steam condensate pipeline through the heat insulation layer and inserting the second end into the filtering layer, the heat insulation layer inside the infiltration well can reduce the contact between the steam condensate and the cold, prevent the steam condensate from freezing, avoid blockage of the steam condensate pipeline and cause a water hammer accident. At the same time, the heat insulation layer and the filtering layer can play a good role in fixing and supporting the steam condensate pipeline, ensuring the safety and reliability of steam condensate discharge. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 Schematic diagram of the connection between the steam condensate treatment device and the steam pipeline in the embodiment of the present application;

[0025] Figure 2 For Figure 1 Schematic diagram of the structure of the infiltration well in the middle, and the outlet pipe and the ground level are also shown in the figure;

[0026] Figure 3 For Figure 2 Partial enlarged schematic diagram at position A in the middle;

[0027] Figure 4 Partial sectional view of the infiltration well in the steam condensate treatment device in the embodiment of the present application to indicate the water outlet holes;

[0028] Figure 5 Another schematic diagram of the structure of the steam condensate treatment device in the embodiment of the present application, in which a plurality of steam condensate pipelines are arranged at intervals and inserted into the same infiltration well;

[0029] Figure 6 Schematic diagram of the structure in which a plurality of infiltration wells in the steam condensate treatment device in the embodiment of the present application are connected;

[0030] Reference numerals: 10, steam condensate pipeline; 20, infiltration well; 30, steam pipeline; 101, first end; 102, second end; 201, well body; 2011, wellhead; 2012, bottom of the well; X, depth direction; 202, insulation layer; 203, filter layer; 204, water infiltration layer; 200, water outlet hole; 300, permeable layer; 205, movable cover plate; 206, pressure relief pipe; 2061, first section; 2062, second section; 2063, inclined opening; 40, outlet pipe; 207, first isolation layer; 208, second isolation layer; 1001, first pipe; 1002, second pipe; 1003, third pipe; 50, gate valve; 60, steam trap; d, depth of the frozen soil layer. Detailed implementation manners

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "horizontal", "vertical", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In the description of the present application, the meaning of "a plurality" is two or more, and "at least one" means one, two or more, unless otherwise specifically defined. The terms "first", "second", etc. are only used for the convenience of description and are used to name the components or embodiments by numbers, and do not imply an important order among the components or embodiments.

[0033] As a preface to the embodiments of the present application, after the steam condensate discharge pipeline contacts the outside air, the temperature and pressure change rapidly, and it will become a vapor-liquid mixed state, and at the same time, a large amount of heat will be dissipated. If care is not taken, it will cause serious harm to personnel and the environment; at the same time, when the outside environmental temperature is relatively low, the steam condensate will reach the freezing point and freeze into ice, resulting in the freezing and blockage of the outlet of the steam condensate pipeline. In severe cases, there will be a large amount of water in the pipeline, causing accidents such as water hammer in the pipeline. In addition, in most projects, the steam condensate will be discharged into the drainage ditch or rainwater pond. This method is limited by the distance of the drainage point, and there may be a large number of buried pipelines; it is possible that the distance between the drainage point and the drainage ditch or rainwater pond is relatively far, and the pressure of the steam condensate itself is insufficient to be discharged to the designated location; at the same time, the top surface of the drainage ditch or rainwater pond is open, and the steam discharge causes harm to personnel and the environment.

[0034] In view of this, the embodiments of the present application provide a steam condensate treatment device, aiming to solve at least one of the above technical problems.

[0035] Please refer to Figures 1 to 6As shown in the figure, an embodiment of the present application discloses a steam condensate treatment device, including: a steam condensate pipeline 10 and a soakaway pit 20 that are connected and communicate with each other; the steam condensate pipeline 10 has opposite first end 101 and second end 102, the first end 101 is connected to a steam pipeline 30, and the soakaway pit 20 includes: a well body 201, inside the well body 201, a heat preservation layer 202, a filter layer 203 and a water seepage layer 204 are provided along the depth direction X from the wellhead 2011 to the bottom 2012. Part of the steam condensate pipeline 10 penetrates through the heat preservation layer 202 and the second end 102 is inserted into the filter layer 203. An outlet hole 200 is opened on the outer peripheral wall of the well body 201, and the outlet hole 200 is arranged corresponding to the water seepage layer 204. By providing the soakaway pit 20 and partially penetrating the steam condensate pipeline 10 through the heat preservation layer 202 and inserting the second end 102 into the filter layer 203, the heat preservation layer 202 inside the soakaway pit 20 can reduce the contact between the steam condensate and the cold, prevent the steam condensate from freezing, avoid blocking of the steam condensate pipeline 10 and causing a water hammer accident. At the same time, the heat preservation layer 202 and the filter layer 203 can play a good role in fixing and supporting the steam condensate pipeline 10, ensuring the safety and reliability of steam condensate discharge. In some embodiments, the heat preservation layer 202 is formed by filling the inside of the well body 201 with high-temperature centrifugal glass wool, and the filter layer 203 is formed by filling the inside of the well body 201 with sand and gravel. The sand and gravel are mainly coarse yarn (0.5 mm - 2 mm), and the sand and gravel can play a filtering role, effectively reducing the pollution of the steam condensate to the soil and groundwater; the water seepage layer 204 is formed by filling the inside of the well body 201 with pebbles, and the diameter of the pebbles is 40 - 60 mm.

[0036] It should be understood that the steam condensate treatment device of the present application is composed of a steam condensate pipeline 10 and a soakaway pit 20. The soakaway pit 20 is buried underground. Therefore, the position of the drainage point is not restricted, and small-flow steam condensate can be discharged underground at any location, so that the steam condensate will not freeze, ensuring the safety of the steam pipeline 30 system and the safety of personnel and the environment at the same time. In some embodiments, the second end 102 is inserted into the filter layer 203 to a depth of 50 mm along the depth direction X to ensure the stability of the outlet of the steam condensate pipeline 10. In some embodiments, the depth of the heat preservation layer 202 needs to be not less than the depth d of the frozen soil layer. When there is no frozen soil layer, it is necessary to satisfy that the size of the heat preservation layer 202 along the depth direction X is about 700 mm.

[0037] In some embodiments, an adiabatic protection layer is provided on the part of the steam condensate pipeline 10 located on the ground. The adiabatic protection layer is commonly a structure with an inner layer and an outer layer. The inner layer is a high-temperature centrifugal glass wool pipe shell, and the outer shell is an aluminum alloy steel plate protective skin. The adiabatic protection layer can reduce the contact between the steam condensate and the cold of the inner wall of the steam condensate pipeline 10, avoid freezing on the inner wall of the steam condensate pipeline 10, resulting in a reduction in the inner diameter of the pipeline and affecting the steam condensate flow rate, so as to reduce the discharge efficiency.

[0038] In some embodiments, the soakaway pit 20 further includes a permeable layer 300 which surrounds the outer periphery of the well body 201 and is correspondingly arranged with the water seepage layer 204. It should be understood that the permeable layer 300 is composed of crushed stones stacked around the outer periphery of the well body 201, and the diameter of the crushed stones is 40 mm to 60 mm. In some embodiments, the size of the permeable layer 300 in the radial direction of the well body 201 is about 200 mm.

[0039] In some embodiments, the soakaway pit 20 further includes a movable cover plate 205 and a pressure relief pipe 206. The movable cover plate 205 seals the wellhead 2011, and the pressure relief pipe 206 partially penetrates the movable cover plate 205 and communicates the inside and outside of the well body 201. The wellhead 2011 of the soakaway pit 20 is about 50 mm higher than the ground level, and a movable cover plate 205 is arranged at the top, which can prevent rainwater or garbage from entering the soakaway pit 20 and ensure the cleanliness inside the soakaway pit 20. The movable cover plate 205 is made of steel structure and is provided with a plurality of holes for the steam condensate pipeline 10 and the pressure relief pipe 206 to penetrate respectively.

[0040] In some embodiments, please refer to Figure 2 or Figure 4 As shown, the pressure relief pipe 206 includes a first section 2061 and a second section 2062 connected to each other. The first section 2061 penetrates the movable cover plate 205 and communicates with the inside of the well body 201. The second section 2062 is horizontally arranged outside the well body 201, and an inclined opening 2063 is provided at the end. The pressure relief pipe 206 can balance the internal and external pressures of the soakaway pit 20 and protect the device; through the horizontally arranged second section 2062 and the inclined opening 2063, rainwater can be prevented from entering the soakaway pit 20.

[0041] In some embodiments, the diameter of the pressure relief pipe 206 is about 25 mm, and the second section 2062 needs to be about 2500 mm higher than the ground level to avoid harm to the surrounding environment and personnel caused by the discharge of steam heat.

[0042] In some embodiments, the bottom of the well body 201 is an open structure, which can enable the steam condensate to quickly drain into the ground and improve the drainage efficiency.

[0043] In some embodiments, please refer to Figure 2 As shown, the treatment device further includes a water outlet pipe 40 which is connected to the well body 201 and is correspondingly arranged with the heat preservation layer 202. The water outlet pipe 40 can discharge the steam condensate in the heat preservation layer 202 to other treatment devices. It should be understood that the other treatment devices include any one or a combination of a drainage ditch, a rainwater pond or an adjacent steam condensate treatment device. When the amount of steam condensate temporarily exceeds the treatment capacity of the soakaway pit 20, it can be urgently sent to the soakaway pit 20 in a nearby drainage ditch or rainwater pond or an adjacent steam condensate treatment device (such as Figure 6As shown). The steam condensate treatment device is designed to be located near where the steam needs to be discharged. At the same time, multiple steam condensate treatment devices can be set at different low points according to the direction of the steam pipeline 30, which can achieve standardized design and save design costs. At the same time, the present application occupies a small area, saves space, and improves space utilization. In some embodiments, the water outlet pipe 40 is inserted into the insulation layer 202 and is set close to the bottom of the insulation layer 202.

[0044] In some embodiments, see Figure 3 As shown, the seepage well 20 also includes a first isolation layer 207, which is made of a water-permeable material and is disposed between the filter layer 203 and the water-permeable layer 204. In some embodiments, the seepage well 20 also includes a second isolation layer 208, which is made of a water-permeable material and is disposed on the outer peripheral wall of the well body 201 and corresponds to the position of the water outlet 200. It should be understood that in some embodiments, the first isolation layer 207 and the second isolation layer 208 are both geotextiles, which can maintain the overall structure and function of the seepage well 20. While ensuring water permeability, the first isolation layer 207 can isolate the filter layer 203 and the water-permeable layer 204 to prevent the loss of materials in the filter layer 203 and the water-permeable layer 204, and the second isolation layer 208 can block the water outlet 200 to prevent the external materials of the well body 201 from clogging the water outlet 200 and affecting the steam condensate discharge efficiency.

[0045] In some embodiments, the dimension of the water seepage layer 204 along the depth direction X is 1000 mm, and a water outlet hole 200 is opened on the outer peripheral wall of the well body 201. The water outlet hole 200 is set corresponding to the water seepage layer 204, the water outlet hole 200 has a diameter of 15 mm, and the opening rate is 5%.

[0046] In some embodiments, see Figure 5As shown in the figure, the processing device includes: a plurality of steam condensate pipelines 10 and a sump 20, and the plurality of steam condensate pipelines 10 are arranged at intervals. Multiple steam condensate pipelines 10 can enter the same sump 20, which can save land. In some embodiments, the sump 20 is made of reinforced concrete pipe with a wall thickness of 100 mm to 200 mm. When multiple steam condensate pipelines 10 enter the same sump 20, the diameter of the sump 20 can be enlarged. In some embodiments, the inner diameter D of the pipeline of the sump 20 satisfies 400 mm ≤ D ≤ 1000 mm. Specifically, D can be any value among 400 mm, 500 mm, 600 mm, 700 mm, 800 mm, 900 mm, 1000 mm or the range value between any two values. The larger the inner diameter of the pipeline of the sump 20, the more steam condensate pipelines 10 can enter. In order to ensure the strength and stability of the sump 20, the wall thickness of the sump 20 can be larger. The sump 20 adopts a reinforced concrete structure, with strong compressive resistance and high durability, which can meet most site requirements and has strong applicability.

[0047] In some embodiments, the steam condensate pipeline 10 includes a first pipe 1001, a second pipe 1002 and a third pipe 1003. The second pipe 1002 is located between the first pipe 1001 and the third pipe 1003 and connects the first pipe 1001 and the third pipe 1003. The arrangement direction of the second pipe 1002 intersects with the depth direction X. The first pipe 1001 is connected to the steam pipeline 30, and a part of the third pipe 1003 penetrates into the filter layer 203; a gate valve 50 and a steam trap 60 are provided on the part of the third pipe 1003 above the ground. Preferably, the second pipe 1002 is horizontally arranged, that is, the arrangement direction is perpendicular to the depth direction X. It should be understood that the first pipe 1001, the second pipe 1002 and the third pipe 1003 can be of a split type or an integral structure. By connecting the low point of the steam pipeline 30 through the first pipe 1001, it is ensured that the liquid in the steam pipeline 30 is drained. The flow rate of the steam condensate in the steam condensate pipeline 10 can be slowed down through the first pipe 1001 and the second pipe 1002; a gate valve 50 and a steam trap 60 are provided on the third pipe 1003. On the one hand, the gate valve 50 and the steam trap 60 are at a sufficient distance from the steam pipeline 30, which can protect the gate valve 50 and the steam trap 60. On the other hand, the center of the gate valve 50 is 1.2 m above the ground level, and the center of the steam trap 60 is 1 m above the ground level, which is convenient for maintenance and repair. When multiple steam condensate pipelines 10 enter the same sump 20, it is necessary to ensure that the valve heights of the pipelines on the ground of multiple steam condensates are the same, and at the same time, the pipeline spacing needs to meet the relevant requirements of heat insulation.

[0048] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0049] The above has introduced in detail the steam condensate treatment device provided by the embodiments of the present application, and specific examples have been used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A steam condensate treatment device, characterized in that: include: A connected steam condensate pipeline (10) and a water seepage well (20); The steam condensate pipeline (10) has a first end (101) and a second end (102) opposite to each other, the first end (101) is connected to the steam pipeline (30), and the water seepage well (20) comprises: A well body (201), wherein the well body (201) is provided with a heat preservation layer (202), a filter layer (203) and a water seepage layer (204) along a depth direction (X) from a wellhead (2011) to a well bottom (2012), the steam condensate pipeline (10) partially passes through the heat preservation layer (202) and the second end (102) is inserted into the filter layer (203), and a water outlet hole (200) is opened on the outer peripheral wall of the well body (201), and the water outlet hole (200) is arranged corresponding to the water seepage layer (204).

2. The steam condensate treatment device according to claim 1, characterized in that: The portion of the steam condensate pipeline (10) located above the ground is provided with a heat insulating protective layer.

3. The steam condensate treatment device according to claim 1, characterized in that: The water seepage well (20) further comprises a water permeable layer (300), wherein the water permeable layer (300) surrounds the outer circumference of the well body (201) and is arranged corresponding to the water seepage layer (204).

4. The steam condensate treatment device according to claim 1, characterized in that: The water infiltration well (20) further comprises: A movable cover plate (205), wherein the movable cover plate (205) covers the wellhead (2011); A pressure relief pipe (206), wherein a portion of the pressure relief pipe (206) passes through the movable cover plate (205) and is connected to the inside and outside of the well body (201).

5. The steam condensate treatment device according to claim 4, characterized in that: The pressure relief pipe (206) comprises a first section (2061) and a second section (2062) which are connected to each other. The first section (2061) passes through the movable cover plate (205) and is connected to the interior of the well body (201). The second section (2062) is horizontally arranged outside the well body (201) and has an oblique opening (2063) at its end.

6. The steam condensate treatment device according to claim 1, characterized in that: The bottom of the well body (201) is an open structure.

7. The steam condensate treatment device according to claim 1, characterized in that: The processing device further comprises a water outlet pipe (40), the water outlet pipe (40) being in communication with the well body (201) and being arranged corresponding to the thermal insulation layer (202), the water outlet pipe (40) being capable of discharging the steam condensate in the thermal insulation layer (202) to other processing devices.

8. The steam condensate treatment device according to claim 1, characterized in that: The water infiltration well (20) further comprises a first isolation layer (207), wherein the first isolation layer (207) is made of a water-permeable material and is arranged between the filter layer (203) and the water infiltration layer (204).

9. The steam condensate treatment device according to claim 1, characterized in that: The water seepage well (20) further comprises a second isolation layer (208), the second isolation layer (208) being made of a water-permeable material and being arranged on the outer peripheral wall of the well body (201) and corresponding to the position of the water outlet hole (200).

10. The steam condensate treatment device according to claim 1, characterized in that: The processing device comprises: A plurality of steam condensate pipelines (10) and water seepage wells (20), wherein the plurality of steam condensate pipelines (10) are arranged at intervals.

11. The steam condensate treatment device according to claim 10, characterized in that: The inner diameter dimension D of the pipe of the water seepage well (20) satisfies 400mm≤D≤1000mm.

12. The steam condensate treatment device according to claim 10, characterized in that: The steam condensate pipeline (10) comprises a first pipe (1001), a second pipe (1002) and a third pipe (1003); the second pipe (1002) is located between the first pipe (1001) and the third pipe (1003), and connects the first pipe (1001) and the third pipe (1003); the arrangement direction of the second pipe (1002) intersects with the depth direction (X); the first pipe (1001) is connected to the steam pipeline (30); and a portion of the third pipe (1003) is inserted into the filter layer (203); The treatment device further comprises a gate valve (50) and a drain valve (60), wherein the gate valve (50) and the drain valve (60) are arranged at a portion of the third pipe (1003) located above the ground.

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