CN103438471B - Chimney internal cylinder condensed fluid collection blowdown system and chimney - Google Patents

Abstract

The present invention discloses a kind of chimney internal cylinder condensed fluid collection blowdown system and chimney. Wherein, collect blowdown system and comprise the multiple liquid collector arranged along chimney height direction and the condensate collector tube being arranged on chimney internal cylinder outer side wall. The collection box of the lowest bid eminence that liquid collector comprises the liquid collecting collecting ring arranged on chimney internal cylinder inwall, be arranged on liquid collecting collecting ring and connect the liquid discharge pipe of liquid collecting collecting ring and condensate collector tube. Phlegma is collected by the liquid collecting collecting ring of chimney internal cylinder inner side-wall, confluxes into the collection box of liquid collecting collecting ring end, then exports to condensate collector tube by liquid discharge pipe, finally picks out by condensate collector tube and drains into outside Waste Water Treatment. The condensed fluid collection blowdown system of the present invention can reduce phlegma gathering in the random trickling of interior cylinder inwall and local, threatens and the generation of chimney rain to alleviate the corrodibility to cylinder inwall in phlegma.

Description

Chimney inner tube condensate collection and discharge system and chimney

technical field

The invention relates to the field of thermal power generation, in particular to a chimney in a thermal power plant.

Background technique

Since the beginning of this century, thermal power plants have added desulfurization systems one after another. The wet limestone washing method is the most widely used and mature process in the world today, and it is also the leading process for desulfurization in thermal power plants. At present, traditional chimneys only have a condensate collection pipe at the bottom of the flue inlet, which can only discharge part of the condensate. The inner tube of the chimney still faces the following problems: ①After the flue gas is wet desulfurized, although the content of sulfur dioxide in the flue gas However, due to the wet desulfurization, the flue gas humidity increases and the temperature decreases, the flue gas is easy to condense on the inner wall of the chimney, and combines with the residual medium in the flue gas to form a highly corrosive condensate, which is harmful to the inner tube of the chimney. ②When the velocity of the flue gas in the chimney is higher than the reverse flow velocity of the material of the chimney, the condensate on the inner wall of the chimney will flow upwards, because this part of the liquid entrained by the flue gas The droplets are quite large, and the flue gas outside the chimney cannot completely mix with the dry air before falling to the ground to evaporate the droplets, and the droplets will fall on buildings, equipment, cars, etc. near the chimney of the power plant, causing secondary damage. pollution, forming what is commonly known as chimney rain.

Contents of the invention

The purpose of the present invention is to propose a condensate collection and discharge system, which concentrates, systematically, multi-section, and effectively collects, guides and discharges the condensate formed by the condensation on the inner wall of the inner cylinder, and reduces the condensate as much as possible. The random flow and local accumulation of the inner wall of the cylinder can reduce the corrosive threat to the inner wall of the condensate inner cylinder and the generation of chimney rain.

In order to achieve the above object, according to one aspect of the present invention, a chimney inner cylinder condensate collection and discharge system is provided, wherein the collection and discharge system includes a plurality of liquid collection devices arranged along the chimney height direction and arranged in the chimney inner cylinder The condensate collection pipe on the outer wall, the liquid collection device includes a liquid collection collection ring arranged on the inner wall of the chimney inner cylinder, a collection box arranged at the lowest elevation of the liquid collection collection ring, and a collection box connected to the liquid collection The drain pipe of the collection ring and the condensate collection pipe, wherein the condensate is collected through the liquid collection ring on the inner wall of the chimney inner tube, and then flows into the collection box at the end of the liquid collection collection ring, and then The drain pipe is led to the condensate collecting pipe, and finally connected to the condensate collecting pipe to be discharged to an external waste water treatment system.

Preferably, the liquid collecting ring is ring-shaped around the inner wall of the chimney inner cylinder, and has a certain height difference along the height direction of the chimney, and the bottom wall of the liquid collecting collecting ring has a certain slope relative to the inner wall of the chimney inner cylinder, and the slope is set to facilitate The natural flow and collection of condensate avoids local precipitation and accumulation of ash in the condensate.

Preferably, the liquid collecting ring may be an open groove provided on the inner side wall of the chimney with the opening facing upward.

Preferably, the collection box is arranged on the inner wall of the chimney inner tube, is located at the end of the liquid collection collection ring and is in fluid communication with the liquid collection collection ring.

Preferably, the condensate collecting pipes form a pipe network arrangement, pass through the drain pipes at each liquid collecting ring and communicate in fluid, and are connected to an external waste water treatment system.

Preferably, the chimney inner cylinder is composed of a vertical section of the chimney inner cylinder and a horizontal section of the chimney inner cylinder, and both the vertical section of the chimney inner cylinder and the horizontal section of the chimney inner cylinder are provided with a liquid collecting device and a condensate collecting pipe.

The drip collector ring may be attached to the chimney barrel, or may be integrally formed with the chimney barrel.

The collection box may be attached to the chimney core, or may be integrally formed with the chimney core.

According to another aspect of the present invention, a chimney is also provided, the chimney includes an outer cylinder and an inner cylinder, and the chimney inner cylinder is provided with the above-mentioned chimney inner cylinder condensate collection and discharge system.

The condensate collection and discharge system of the present invention can reduce the random flow and local accumulation of condensate on the inner wall of the inner cylinder, so as to reduce the corrosive threat to the inner wall of the condensate inner cylinder and the generation of chimney rain.

Description of drawings

Fig. 1 is a schematic structural view of a chimney inner cylinder condensate collection and discharge system according to the present invention.

Fig. 2 is a schematic diagram showing the internal structure of a part of the chimney inner cylinder provided with the condensate collection and discharge system of the present invention.

Fig. 3 is a partially enlarged cross-sectional view of part A in Fig. 2 .

Fig. 4 is a partially cut and enlarged view of part B in Fig. 2 cut along a direction perpendicular to the height of the chimney.

Fig. 5 is a partially cut and enlarged view of part B in Fig. 2 cut along a direction parallel to the height of the chimney.

detailed description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but only to illustrate the essence of the technical solutions of the present invention.

Terminology Explanation

Condensate: Due to the decrease in temperature, when the flue gas reaches the dew point temperature of its constituent medium, it changes from gaseous state to liquid state, and the resulting liquid substance is condensate. Condensate in chimneys is usually of varying degrees of corrosiveness.

Fig. 1 shows a schematic structural view of a chimney provided with a chimney inner tube condensate collection and discharge system according to the present invention. The chimney includes a chimney inner tube 10 and a chimney outer tube 20 . The number of chimney inner cylinders 10 can be 1, 2 or more, and there are 2 in Fig. 1 . The condensate collection and discharge system includes a plurality of liquid collection devices 30 arranged along the height direction of the chimney and a condensate collection pipe 3 arranged on the outer wall of the inner tube of the chimney. The liquid collection device 30 is composed of a liquid collection ring 1 on the inner wall 101 of the inner cylinder, a collection box 2, and a drain pipe 4 connecting the inner wall liquid collection ring 1 and the outer wall condensate collection pipe 3 . The condensate is collected through the liquid collection ring 1 on the inner wall of the inner cylinder, and then flows into the collection box 2 at the end of the collection ring 1 and in fluid communication with the collection ring 1, and then is exported to the outer wall of the inner cylinder by the drain pipe 4. The condensate collecting pipe 3 is finally connected and discharged to an external waste water treatment system (not shown in the figure) from the condensate collecting pipe.

Among them, the liquid collecting device 30 can be arranged in multiple channels along the height range of the chimney according to the actual situation of the specific project, and the condensate can be collected in sections and layers. Entrainment and Diffusion. The liquid collection collection ring 1 should be set in an inclined shape with a certain height difference along the ring direction. The slope setting should be fully conducive to the natural flow and collection of condensate, and avoid local precipitation and accumulation of dust in the condensate. The collection ring 1 The cross-sectional size can also be designed and adjusted according to different engineering conditions. The collection box 2 is arranged at the lowest elevation of each liquid collecting ring 1 . The drain pipe 4 is arranged at the bottom of the collection box 2 and connected to the condensate collection pipe 3 on the outer wall. The condensate collection pipes 3 are distributed on the outer wall of the chimney inner cylinder 10, and are connected to the drain pipes 4 to form a drain pipe network, and the condensate discharged from each liquid collection ring 1 is collected into the drain pipe network, and the drain The pipe network passes through various collection rings, and is connected to the external wastewater treatment system, and finally collected and exported to the external wastewater treatment system.

Preferably, the liquid collecting ring is ring-shaped around the inner wall of the chimney tube, has a certain height difference along the height direction of the chimney, and the bottom wall 11 of the liquid collecting ring 1 has a certain slope relative to the inner wall of the chimney tube, The slope is set to facilitate the natural flow and collection of the condensate, and avoid local precipitation and accumulation of dust in the condensate.

Preferably, the liquid collection collection ring 1 is an open groove provided on the inner wall of the chimney inner cylinder with the opening facing upwards, which is connected to the chimney inner cylinder by means such as bonding, bolt connection, or integrated with the chimney inner cylinder form.

Preferably, the collection box 2 is disposed on the inner wall of the chimney inner cylinder, located at the end of the liquid collection ring and in fluid communication with the liquid collection ring, and is connected to the chimney inner cylinder by means such as bonding or bolting , or integrally formed with the inner cylinder of the chimney.

Preferably, the chimney inner cylinder is composed of a vertical section of the chimney inner cylinder and a horizontal section of the chimney inner cylinder, both of which are provided with the liquid collecting device and the condensate collection pipe.

The chimney inner barrel condensate collection and discharge system constructed in the present invention considers the collection and discharge of condensate as a systematic project, and reduces the The random flow and local accumulation of condensate on the inner wall of the inner cylinder effectively solves the problem of collection and discharge of condensate in the inner cylinder of the chimney, reduces the threat of corrosion on the inner wall of the inner cylinder and the generation of chimney rain, and can effectively reduce the chimney Secondary pollution of rain to buildings, residents and the environment near the power plant.

The preferred embodiments of the present invention have been described in detail above, but it should be understood that those skilled in the art can make various changes or modifications to the present invention after reading the above teaching content of the present invention. These equivalent forms also fall within the scope defined by the appended claims of this application.

Claims (8)

1. a chimney internal cylinder condensed fluid collection blowdown system, it is characterized in that, described collection blowdown system comprises the multiple liquid collector arranged along chimney height direction and the condensate collector tube being arranged on chimney internal cylinder outer side wall, described liquid collector comprises the liquid collecting collecting ring being arranged on chimney internal cylinder inwall, it is arranged on the collection box of the lowest bid eminence of described liquid collecting collecting ring, and connect the liquid discharge pipe of described liquid collecting collecting ring and described condensate collector tube, wherein, phlegma is collected by the liquid collecting collecting ring of described chimney internal cylinder inner side-wall, conflux into the collection box of described liquid collecting collecting ring end, described condensate collector tube is exported to again by described liquid discharge pipe, final picking out by described condensate collector tube drains into outside Waste Water Treatment, wherein said chimney internal cylinder is made up of the vertical section of chimney internal cylinder and chimney internal cylinder horizontal section, the vertical section of described chimney internal cylinder and described chimney internal cylinder horizontal section are equipped with described liquid collector and described condensate collector tube.

2. chimney internal cylinder condensed fluid collection blowdown system as claimed in claim 1, it is characterized in that, described liquid collecting collecting ring is the ring-type around chimney internal cylinder inwall, there is certain height difference in height direction along chimney, and the diapire of described liquid collecting collecting ring has certain slope relative to chimney internal cylinder inwall, the described gradient is arranged for ease of the trickling naturally of phlegma and collects, and avoids localized precipitation and the accumulation of carrying long-pending ash in phlegma.

3. chimney internal cylinder condensed fluid collection blowdown system as claimed in claim 1, it is characterised in that, described liquid collecting collecting ring is the opening up uncovered groove being arranged on described chimney internal cylinder inner side-wall.

4. chimney internal cylinder condensed fluid collection blowdown system as claimed in claim 1, it is characterised in that, described collection box is arranged on described chimney internal cylinder inner side-wall, be positioned at described liquid collecting collecting ring end and with liquid collecting collecting ring fluid communication.

5. chimney internal cylinder condensed fluid collection blowdown system as claimed in claim 1, it is characterised in that, described condensate collector tube forms pipe net arrangement, liquid discharge pipe by way of each liquid collecting collecting ring place fluid communication, and is connected with outside Waste Water Treatment.

6. chimney internal cylinder condensed fluid collection blowdown system as claimed in claim 3, it is characterised in that, described liquid collecting collecting ring is connected to chimney internal cylinder, or is integrally formed with chimney internal cylinder.

7. chimney internal cylinder condensed fluid collection blowdown system as claimed in claim 4, it is characterised in that, described collection box is connected to chimney internal cylinder, or is integrally formed with chimney internal cylinder.

8. a chimney, described chimney comprises urceolus and interior cylinder, it is characterised in that, described chimney internal cylinder is provided with the chimney internal cylinder condensed fluid collection blowdown system according to any one of claim 1-7.