CN210815158U

CN210815158U - Independent cold tube bank water cast reaction unit of external bellows type of tube sheet

Info

Publication number: CN210815158U
Application number: CN201920758941.XU
Authority: CN
Inventors: 刘金成; 赵素峰
Original assignee: 刘金成
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-06-23
Anticipated expiration: 2029-05-24

Abstract

The utility model discloses an independent cold tube bundle water pipe type reaction unit with external corrugated tube plates, wherein the cold tube bundle is of a corrugated structure, a steam and water mixture outlet and a water inlet are respectively arranged on a top seal head and a bottom seal head, the upper part of the cold tube bundle is fixedly connected with an upper tube plate after penetrating out of the top seal head, the upper tube plate is fixedly connected with an upper header tube seal head inlet, and the upper header tube seal head outlet is connected with a steam drum inlet; the lower part of the cold tube bundle penetrates through the bottom seal head and then is fixedly connected with the lower tube plate, the lower tube plate is fixedly connected with the outlet of the lower header tube seal head, the inlet of the lower header tube seal head is connected with the outlet of the power pump, and the inlet of the power pump is connected with the water outlet of the steam drum. When having the cold pipe of damage, the upper and lower tube sheet of accessible overhauls or keeps apart the heat exchange tube that leaks and damage, has avoided unloading out the drawback of back examining and repairing and equipment replacement with the catalyst, has shortened and has overhauld or maintenance duration, and the cold tube bank of corrugated structure has reduced the temperature difference stress between reactor barrel and the heat exchange tube, avoids adopting expansion joint or metal collapsible tube, and is rational in infrastructure, and factor of safety is high.

Description

Independent cold tube bank water cast reaction unit of external bellows type of tube sheet

Technical Field

The present invention relates to a water pipe type reaction apparatus for removing reaction heat in time using phase change of water.

Background

The development of chemical reactor technology makes water tubular reactor use in chemical industry a large amount, and along with the macro-scale development of chemical plant, the reactor gradually develops to the macro-scale, and its structure is also more and more complicated, and large-scale chemical plant conveniently has proposed higher requirement to the long period steady operation and the maintenance of chemical plant simultaneously, to the large-scale water tubular reactor that is equipped with a large amount of cold tube bundles, the welding seam quantity correspondingly increases, and the probability of leaking also correspondingly increases. If the tube bundle in the reactor has a problem, the whole system is forced to stop, so that the normal production is seriously influenced, the overhauling difficulty is high, and the overhauling time is long.

The water pipe type reactor disclosed by ZL200920102700.6 and the multi-steam-drum water pipe type reactor disclosed by ZL201320560944.5 are characterized in that a plurality of groups of components such as cold pipe bundle units, upper and lower header pipes and the like are arranged in a shell of the water pipe type reactor, the upper end and the lower end of each cold pipe bundle unit are communicated with the header pipes arranged in equipment, the upper header pipes are communicated with a steam drum through a plurality of header pipes, and the lower header pipes are communicated with a water inlet header pipe through a plurality of header pipes; however, once the cold tube bundle in the cold tube bundle unit leaks, the cold tube bundle unit which is damaged needs to be checked for leakage and isolated, the catalyst has to be replaced and discharged after the system is stopped, the maintenance time is long, and the influence on the production is large.

Disclosure of Invention

The invention provides a water pipe type reaction device structure with an external corrugated pipe type independent cold pipe bundle unit of a pipe plate, which overcomes the defects in the prior art.

The purpose of the invention is realized by the following technical scheme:

the water pipe type reaction device with the external corrugated pipe type independent cold pipe bundle comprises an upper header assembly, a lower header assembly and a cold pipe bundle arranged in a reactor barrel, and is characterized in that each cold pipe of the cold pipe bundle is of a corrugated structure, the cold pipe bundle is axially and uniformly distributed in the reactor barrel, an effective number of steam-water mixture outlets and water inlets are respectively arranged on a top header and a bottom header, the upper part of the cold pipe bundle penetrates out of the top header and is fixedly connected with an upper pipe plate at a steam-water mixture outlet end, the upper pipe plate is fixedly connected with an upper header inlet in the upper header assembly, and the upper header outlet is connected with a steam drum inlet; the lower part of the cold tube bundle penetrates out of the bottom seal head and then is fixedly connected with a lower tube plate of a water inlet end of the bottom seal head, the lower tube plate is fixedly connected with a lower header tube seal head outlet in the lower header assembly, an inlet of the lower header tube seal head is connected with an outlet of the power pump, and an inlet of the power pump is connected with a water outlet of the steam drum.

The reactor comprises a reactor barrel, an inner barrel is arranged in the reactor barrel, the upper end and the lower end of the inner barrel are fixedly connected with a shell of the reactor barrel respectively, a central tube is arranged at the axis of the inner barrel, air holes are formed in the wall of the inner barrel and the wall of the central tube respectively, and the cold tube bundles are uniformly distributed between the inner barrel and the central tube.

The upper tube plate is connected or welded with a flange between the seal heads in the upper header assembly; and the lower tube plate is connected with or welded with the seal heads in the lower header assembly through flanges.

The invention achieves the technical progress that:

because the upper tube plate and the lower tube plate of each group of cold tube bundle units are respectively led out of the reactor cylinder body and are directly connected with the external upper and lower header assemblies, once a damaged cold tube is in the reactor, because the upper tube plate and the lower tube plate of each group of cold tube bundle units are respectively arranged outside the reactor cylinder body, the leaked and damaged heat exchange tube can be overhauled or isolated through the upper and lower tube plates, the defects that the catalyst has to be removed and then overhauled and replaced by equipment in the prior art are avoided, the overhauling or maintaining time is greatly shortened, the influence of the overhauling on the production is reduced to the minimum, and because the cold tube bundle of the heat exchange tube is of a corrugated structure which is axially arranged, an expansion joint or a metal hose is avoided, the temperature difference stress between the reactor cylinder body and the heat exchange tube is effectively reduced, the invention has simple and.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a schematic top view of the reactor barrel of the present invention.

Fig. 3 is a schematic structural view of the present invention with a gas collecting channel and a gas distributing channel.

Detailed Description

Example 1: as shown in figure 1, the water-tube type reactor with corrugated tubes and independent cooling tube bundles comprises an upper header assembly, a lower header assembly and cooling tube bundles 7 arranged in a reactor cylinder 8, wherein each cooling tube of the cooling tube bundles 7 is of a corrugated structure, the cooling tube bundles 7 are axially and uniformly arranged in the reactor cylinder 8, an effective number of steam-water mixture outlets 16 and water inlets 17 are respectively arranged on a top header 9 and a bottom header 6, 4 steam-water mixture outlets 16 and water inlets 17 are respectively arranged in the embodiment, the upper part of each cooling tube bundle 7 penetrates through the top header 9 and is fixedly connected with an upper tube plate 10 which has the flange effect on the steam-water mixture outlets 16 of the top header 9, the steam-water mixture outlets 16 are fixedly connected with the upper tube plate 10, the upper tube plate 10 is fixedly connected with an upper header 12 inlet in the upper header assembly through a flange 11 (or through welding), and the outlets of the upper header 12 are fixedly connected with a steam drum 15 through a valve 14 after passing through a connecting tube 13, The water inlets are connected; the lower part of the cold tube bundle 7 penetrates through the bottom seal head 6 and is fixedly connected with a lower tube plate 5 which has the function of a flange on a water inlet 17 of the bottom seal head 6, the lower tube plate 5 is fixedly connected with an outlet of a lower header tube seal head 3 in a lower header assembly through a flange 4, an inlet of the lower header tube seal head 3 is connected with an outlet of a power pump 1 through a valve 2 after passing through a connecting pipe, and an inlet of the pump 1 is connected with a water outlet of a steam drum 15 through a pipeline. According to the design scale, one or more upper header pipe seal heads 12 with external steam-water mixture outlets 16 on the top end head 9 and one or more lower header pipe seal heads 3 with external steam-water mixture outlets on the bottom end head 6 can be arranged, as shown in fig. 2, four upper header pipe seal heads 12 and four lower header pipe seal heads 3 are respectively arranged in the embodiment, and four steam-water mixture outlets 16 on the top end head 9 and four water inlets 17 on the bottom end head 6 are respectively arranged corresponding to the four upper header pipe seal heads 12 and the four lower header pipe seal heads 3. When the cold tube bundle 7 is found to be damaged, the leaked heat exchange tubes can be inspected and the damaged heat exchange tubes can be repaired or isolated by the upper tube plates 10 and the lower tube plates 5 extending out of the reactor cylinder 8, so as to avoid catalyst discharge and equipment replacement.

Example 2: as shown in fig. 3, the difference between this embodiment and embodiment 1 is that an inner cylinder 18 is installed in a reactor cylinder 8, the upper and lower ends of the inner cylinder 18 are respectively and fixedly connected with a shell of the reactor cylinder 8, a central tube 19 is installed at the axis of the inner cylinder 18, air holes 20 and 21 are respectively opened on the wall of the inner cylinder 18 and the wall of the central tube 19, and the bellows type cold tube bundles 7 are axially and uniformly distributed between the inner cylinder 18 and the central tube 19, and the gas collection flow channel and the gas distribution flow channel form a radial reactor in which a reaction medium flows transversely in a catalyst.

Claims

1. A corrugated tube type independent cold tube bundle water tube type reaction device with external tube plates comprises an upper header assembly, a lower header assembly, a top header, a bottom header and a cold tube bundle arranged in a reactor barrel, and is characterized in that each cold tube of the cold tube bundle is of a corrugated structure, the cold tube bundle is axially and uniformly distributed in the reactor barrel, an effective number of steam-water mixture outlets and water inlets are respectively arranged on the top header and the bottom header, the upper part of the cold tube bundle penetrates out of the top header and is fixedly connected with an upper tube plate at a steam-water mixture outlet end, the upper tube plate is fixedly connected with an upper header inlet in the upper header assembly, and an upper header outlet is connected with a steam drum inlet; the lower part of the cold tube bundle penetrates out of the bottom seal head and then is fixedly connected with a lower tube plate of a water inlet end of the bottom seal head, the lower tube plate is fixedly connected with a lower header tube seal head outlet in the lower header assembly, an inlet of the lower header tube seal head is connected with an outlet of the power pump, and an inlet of the power pump is connected with a water outlet of the steam drum.

2. The water pipe type reactor with the external corrugated pipe type independent cold pipe bundle of the tube plate as claimed in claim 1, wherein the reactor barrel is internally provided with an inner cylinder, the upper end and the lower end of the inner cylinder are fixedly connected with the shell of the reactor barrel respectively, the axis of the inner cylinder is provided with a central pipe, the wall of the inner cylinder and the wall of the central pipe are respectively provided with air holes, and the cold pipe bundles are uniformly distributed between the inner cylinder and the central pipe.

3. The water tube type reaction device with the external corrugated tube type independent cold tube bundle of the tube plate as claimed in claim 1 or 2, wherein the upper tube plate is connected or welded with a flange between the seal heads in the upper header assembly; and the lower tube plate is connected with or welded with the seal heads in the lower header assembly through flanges.