CN216668378U

CN216668378U - Heat exchanger for extracting alkali from red mud

Info

Publication number: CN216668378U
Application number: CN202122682816.5U
Authority: CN
Inventors: 王志强; 郑同耀; 张佩佑; 张笃亮; 贾红岩; 陈晓航; 任毅准
Original assignee: Luoyang Junjiang Building Material Technology Co ltd; Luoyang Highway Development Center
Current assignee: Luoyang Junjiang Building Material Technology Co ltd; Luoyang Highway Development Center
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-06-03
Anticipated expiration: 2031-11-04

Abstract

A red mud alkali extraction heat exchanger relates to the field of heat exchanger equipment and comprises a shell, wherein the inner cavity of the shell is divided into a high-temperature liquid outlet area, a heat exchange area and a low-temperature liquid inlet area from top to bottom through an upper partition plate and a lower partition plate, a plurality of heat exchange tubes capable of communicating the high-temperature liquid outlet area and the low-temperature liquid inlet area are arranged in the heat exchange area at intervals, the upper partition plate is funnel-shaped, and the bottom tip part of the upper partition plate is correspondingly communicated with one heat exchange tube; the shell is provided with a liquid outlet pipe and a liquid inlet pipe corresponding to the outer walls of the high-temperature liquid outlet area and the low-temperature liquid inlet area respectively, the upper end of the outer wall of the shell corresponding to the heat exchange area is provided with a steam inlet pipe and an overflow pipe, the lower end of the outer wall of the shell corresponding to the heat exchange area is provided with a condensation outlet pipe, pipe bodies of the overflow pipe and the condensation outlet pipe are correspondingly communicated through the liquid level pipe, two ends of the liquid level pipe are provided with normally open valves, and pipe ends of the overflow pipe and the condensation outlet pipe are provided with a drain valve and an adjusting valve respectively; the heat exchanger can monitor and regulate the shell side fluid of the heat exchanger, and is convenient for cleaning the heat exchanger.

Description

Heat exchanger for extracting alkali from red mud

Technical Field

The utility model relates to the field of heat exchanger equipment, in particular to a heat exchanger for extracting alkali from red mud.

Background

The heat exchanger is a device for transferring partial heat of hot fluid to cold fluid, is also called as a heat exchanger and plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production; the red mud alkali extraction is to extract sodium carbonate in a solution for secondary utilization after washing and filter pressing of the red mud, wherein a heat exchanger is needed when alkali liquor is evaporated and concentrated;

the heating in the tube pass of the heat exchanger is the original alkali liquor, and the introduction in the shell pass of the heat exchanger is the steam generated in the subsequent evaporation and concentration process of the alkali liquor; because the introduction amount of the steam is determined by the subsequent evaporation concentration process and is not easy to be directly controlled, condensed water and non-condensable gas formed in the shell pass of the heat exchanger must be monitored and discharged in due time, so that the heat exchange of the alkali liquor is prevented from being influenced; in addition, although the red mud is washed and filter-pressed, some impurities are inevitably left in the alkali liquor, and the alkali liquor originally contains sodium carbonate, so that the tube side and the shell side of the heat exchanger need to be cleaned regularly after being used for a certain time, and the blockage is prevented.

Disclosure of Invention

In order to overcome the defects in the background art, the utility model discloses a heat exchanger for extracting alkali from red mud, which can monitor and regulate shell side fluid of the heat exchanger and is convenient for cleaning the heat exchanger.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a heat exchanger for extracting alkali from red mud comprises a shell, wherein the inner cavity of the shell is divided into a high-temperature liquid outlet area, a heat exchange area and a low-temperature liquid inlet area from top to bottom through an upper partition plate and a lower partition plate, a plurality of heat exchange tubes capable of communicating the high-temperature liquid outlet area and the low-temperature liquid inlet area are arranged in the heat exchange area at intervals, the upper partition plate is funnel-shaped, and the bottom tip part of the upper partition plate is correspondingly communicated with one heat exchange tube; the casing corresponds the outer wall in high temperature play liquid district and low temperature entering liquid district respectively and is equipped with drain pipe and feed liquor pipe, the casing corresponds the outer wall upper end in heat transfer district and is equipped with steam and advances pipe and overflow pipe, the casing corresponds the outer wall lower extreme in heat transfer district and is equipped with the condensation exit tube, correspond the intercommunication through the liquid level pipe between the pipe shaft of overflow pipe and condensation exit tube, the both ends of liquid level pipe all are equipped with normally open valve, the pipe end of overflow pipe and condensation exit tube is equipped with trap and governing valve respectively.

Furthermore, the inner bottom surface of the shell corresponding to the low-temperature liquid inlet area is provided with a slope, and the liquid inlet pipe is arranged corresponding to the lower position of the slope.

Furthermore, the liquid outlet pipe is arranged in the center of the top wall of the high-temperature liquid outlet area.

Furthermore, a plurality of corresponding jacks are arranged on the surfaces of the upper partition plate and the lower partition plate, and the end parts of a plurality of heat exchange tubes are correspondingly disassembled into the corresponding jacks and are sealed and fixed with the inner walls of the jacks.

Further, the casing contains and corresponds can dismantle the fixed upper sleeve and the lower sleeve of pegging graft, lower baffle is fixed in upper sleeve's lower extreme inner wall, the upper end of lower sleeve corresponds inserts in the upper sleeve to correspond with the lower plate surface outer fringe of lower baffle and contradict sealedly.

Furthermore, the heat exchange tube body far away from the bottom tip part of the upper partition plate radially expands outwards to form a heat exchange joint, and the heat exchange joints are arranged in a plurality at intervals along the axial direction of the corresponding heat exchange tube.

Furthermore, a sight glass is arranged on the side wall of the shell corresponding to the heat exchange area.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

the heat exchanger for extracting alkali from red mud disclosed by the utility model can monitor the content of condensed water in a heat exchange area by utilizing the principle that a transparent liquid level pipe for communicating an overflow pipe and a condensation outlet pipe and a heat exchange area form a communicating vessel, and can regulate and discharge the condensed water and non-condensable gas through the overflow pipe and a liquid outlet pipe; through establishing to leak hopper-shaped with the last baffle to establish the heat exchange tube to direct from top to bottom, can be convenient for clear up the tube side of heat exchanger, and when the clearance shell side, can advance to let in the pipe simultaneously washing liquid from overflow pipe and steam, guarantee the clean up no dead angle.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of the housing.

In the figure: 1. an overflow pipe; 2. a liquid outlet pipe; 3. an upper partition plate; 4. a housing; 401. an upper sleeve; 402. a lower sleeve; 5. a steam inlet pipe; 6. a heat exchange tube; 601. heat exchange joints; 7. a lower partition plate; 8. a liquid inlet pipe; 9. a condensation outlet pipe; 10. a normally open valve; 11. a liquid level tube; 12. a drain valve; 13. a sight glass.

Detailed Description

In the following description, the technical solutions of the present invention will be described with reference to the drawings of the embodiments of the present invention, and it should be understood that, if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., it is only corresponding to the drawings of the present invention, and for convenience of describing the present invention, it is not necessary to indicate or imply that the indicated devices or elements have a specific orientation:

the heat exchanger for extracting alkali from red mud, which is described by combining the attached drawings 1-2, comprises a shell 4, the inner cavity of the shell 4 is divided into a high-temperature liquid outlet area, a heat exchange area and a low-temperature liquid inlet area from top to bottom through an upper partition plate 3 and a lower partition plate 7, a plurality of heat exchange tubes 6 capable of communicating the high-temperature liquid outlet area and the low-temperature liquid inlet area are arranged in the heat exchange area at intervals, and the heat exchange tubes 6 are vertically and directly arranged and are convenient to clean; according to the requirement, the tube bodies of the heat exchange tubes 6 far away from the bottom tip part of the upper clapboard 3 are radially expanded outwards to form heat exchange joints 601, a plurality of heat exchange joints 601 are arranged at intervals along the axial direction of the corresponding heat exchange tubes 6, the contact area with steam is increased through the heat exchange joints 601, and the heat exchange efficiency can be improved; according to the requirement, the surfaces of the upper partition plate 3 and the lower partition plate 7 are provided with a plurality of corresponding jacks, and the end parts of the plurality of heat exchange tubes 6 are correspondingly disassembled into the corresponding jacks and are fixed with the inner walls of the jacks in a sealing way, so that the stable connection is ensured; in addition, the shell 4 comprises an upper sleeve 401 and a lower sleeve 402 which are correspondingly detachably inserted and fixed, the lower partition plate 7 is fixed on the inner wall of the lower end of the upper sleeve 401, the upper end of the lower sleeve 402 is correspondingly inserted into the upper sleeve 401, is correspondingly abutted and sealed with the outer edge of the lower plate of the lower partition plate 7, and is used for cleaning the low-temperature liquid inlet area after the lower sleeve 402 is removed; the upper partition plate 3 is in a funnel shape, and the bottom tip of the upper partition plate 3 is correspondingly communicated with a heat exchange tube 6, so that the upper partition plate can be cleaned up when a high-temperature liquid outlet area is cleaned;

the shell 4 is provided with a liquid outlet pipe 2 and a liquid inlet pipe 8 corresponding to the outer walls of the high-temperature liquid outlet area and the low-temperature liquid inlet area respectively, the upper end of the outer wall of the shell 4 corresponding to the heat exchange area is provided with a steam inlet pipe 5 and an overflow pipe 1, the lower end of the outer wall of the shell 4 corresponding to the heat exchange area is provided with a condensate outlet pipe 9, pipe bodies of the overflow pipe 1 and the condensate outlet pipe 9 are correspondingly communicated through a liquid level pipe 11, two ends of the liquid level pipe 11 are provided with normally open valves 10, pipe ends of the overflow pipe 1 and the condensate outlet pipe 9 are provided with a drain valve 12 and an adjusting valve respectively, a transparent liquid level pipe 11 communicating the overflow pipe 1 and the condensate outlet pipe 9 can be utilized to form a communicating vessel principle with the heat exchange area to monitor the condensate water content in the heat exchange area, and the discharged condensate water and non-condensable gas can be regulated through the overflow pipe 1 and the liquid outlet pipe 2; according to the requirement, the inner bottom surface of the shell 4 corresponding to the low-temperature liquid inlet area is provided with a slope, and the liquid inlet pipe 8 is arranged corresponding to the low position of the slope, so that the low-temperature liquid inlet area can be discharged completely when being cleaned; in addition, the liquid outlet pipe 2 is arranged in the center of the top wall of the high-temperature liquid outlet area, so that cleaning liquid entering from the liquid outlet pipe 2 can be uniformly cleaned during cleaning; in addition, a sight glass 13 is arranged on the side wall of the shell 4 corresponding to the heat exchange area, so that the use condition of the heat exchange area can be observed through the sight glass 13, and the cleaning time can be determined.

The utility model is not described in detail in the prior art, and it is apparent to a person skilled in the art that the utility model is not limited to details of the above-described exemplary embodiments, but that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the scope of the claims concerned.

Claims

1. A heat exchanger for extracting alkali from red mud is characterized in that: the heat exchanger comprises a shell (4), an inner cavity of the shell (4) is divided into a high-temperature liquid outlet area, a heat exchange area and a low-temperature liquid inlet area from top to bottom through an upper partition plate (3) and a lower partition plate (7), a plurality of heat exchange tubes (6) capable of communicating the high-temperature liquid outlet area and the low-temperature liquid inlet area are arranged in the heat exchange area at intervals, the upper partition plate (3) is in a funnel shape, and the bottom tip part of the upper partition plate (3) is correspondingly communicated with one heat exchange tube (6); casing (4) correspond high temperature respectively and go out the liquid zone and the outer wall that the low temperature entered the liquid zone is equipped with drain pipe (2) and feed liquor pipe (8), casing (4) correspond the outer wall upper end in heat transfer zone and are equipped with steam and advance tub (5) and overflow pipe (1), the outer wall lower extreme that casing (4) correspond the heat transfer zone is equipped with condensation exit tube (9), correspond the intercommunication through level pipe (11) between the pipe shaft of overflow pipe (1) and condensation exit tube (9), the both ends of level pipe (11) all are equipped with normally open valve (10), the pipe end of overflow pipe (1) and condensation exit tube (9) is equipped with trap (12) and governing valve respectively.

2. The heat exchanger for extracting alkali from red mud according to claim 1, which is characterized in that: the inner bottom surface of the shell (4) corresponding to the low-temperature liquid inlet area is provided with a slope, and the liquid inlet pipe (8) is arranged corresponding to the low position of the slope.

3. The heat exchanger for extracting alkali from red mud according to claim 1, which is characterized in that: the liquid outlet pipe (2) is arranged in the center of the top wall of the high-temperature liquid outlet area.

4. The heat exchanger for extracting alkali from red mud according to claim 1, which is characterized in that: the upper partition plate (3) and the lower partition plate (7) are provided with a plurality of corresponding jacks, and the end parts of a plurality of heat exchange tubes (6) are correspondingly disassembled into the corresponding jacks and are sealed and fixed with the inner walls of the jacks.

5. The heat exchanger for extracting alkali from red mud according to claim 1, which is characterized in that: casing (4) contain and correspond detachable grafting fixed last sleeve (401) and lower sleeve (402), baffle (7) are fixed in the lower extreme inner wall of last sleeve (401) down, the upper end of lower sleeve (402) corresponds inserts in last sleeve (401) to correspond with the lower plate face outer fringe of baffle (7) down and contradict sealedly.

6. The heat exchanger for extracting alkali from red mud according to claim 1, which is characterized in that: the heat exchange tube (6) far away from the bottom tip part of the upper clapboard (3) is radially expanded outwards to form a heat exchange joint (601), and a plurality of heat exchange joints (601) are axially arranged along the corresponding heat exchange tube (6) at intervals.

7. The heat exchanger for extracting alkali from red mud according to claim 1, which is characterized in that: and a sight glass (13) is arranged on the side wall of the shell (4) corresponding to the heat exchange area.