CN201548105U

CN201548105U - Spiral plate type heat exchanger for coking plants

Info

Publication number: CN201548105U
Application number: CN2009202547991U
Authority: CN
Inventors: 刘剑珅; 刘一龙
Original assignee: Yuxian Zhongxin Coking & Chemical Co Ltd
Current assignee: Yuxian Zhongxin Coking & Chemical Co Ltd
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2010-08-11
Anticipated expiration: 2019-11-27

Abstract

The utility model relates to a heat exchange device, in particular to a spiral plate type heat exchanger for coking plants, which resolves problems that a heat exchanger used in the existing ammonia distillation process is a plate type heat exchanger, is easy in component loss, high in labor force of workers, high in operation cost and the like. The spiral plate type heat exchanger for coking plants comprises a casing, an ammonia distillation waste water passage and a residual ammonia water passage, wherein the ammonia distillation waste water passage and the residual ammonia water passage are located inside the casing, an upper end surface and a lower end surface of the ammonia distillation waste water passage are respectively communicated with the upper portion and the lower portion of the casing, an ammonia distillation waste water inlet and an ammonia distillation waste water outlet are arranged on the upper portion and the lower portion of the casing to form an axial fluid passage, an upper end surface and a lower end surface of the residual ammonia water passage are respectively covered with sealing plates, and a residual ammonia water inlet and a residual ammonia water outlet are respectively along a center axial line and a peripheral direction of the casing to form a fluid rotation direction passage. The spiral plate type heat exchanger not only is simple in improvement structure and relatively fine in heat exchange effect, can thoroughly remove tar in a heat exchange process without manual detachable cleaning most importantly, saves time and labor and guarantees normal operation of production, but also is relatively low in front-end investment and operation cost.

Description

Coke-oven plant's spiral heat exchanger

Technical field

The utility model relates to a kind of heat-exchanger rig, is specially a kind of coke-oven plant spiral heat exchanger.

Background technology

In the coke making process process, can produce a kind of ammoniacal liquor, be commonly referred to " remained ammonia ", adopt ammonia distillation process that remained ammonia is purified and concentrates at present, be purified waste water and product concentrated ammonia liquor, turn harm into good, and then guarantee follow-up biochemical treatment.The current technology process is as follows: the remained ammonia from the cold bulging workshop section in coke-oven plant is admitted to ammonia still, carry out heat exchange with the high-temperature steam of tower underfeed, ammonia in the remained ammonia is overflowed by the high-temperature steam heated volatile, be condensed into ammoniacal liquor through cooler, be used to produce the sulphur ammonium, and the distilled ammonia wastewater that produces is discharged at the bottom of tower, after the cooler cooling, in the inflow wastewater trough, after water pump is sent into follow-up biochemical treatment operation.In the said process, remained ammonia was earlier removed wherein tar through coke filter before entering ammonia still.

Prove that through production practices there is following problem in current technology, utilize coke filter oil removing ability extreme difference, and tar can't reclaim, in addition, though tar is fluid before ammonia still, but through ammonia still steam blow parsing after, be the very high fluid of viscosity during high temperature, at 50 ℃ with the next solid that becomes, no longer has flowability, cooler in the ammonia still process process and heat exchanger, operating temperature is lower, after residual tar enters, be easy to cause heat exchanger and line clogging, the breaks in production operation.The measure of generally adopting is the plate type heat exchanger that non-removable shell and tube, common spiral heat exchanger is become detachable cleaning at present, though plate type heat exchanger can manually be taken cleaning apart, but labor strength is big, the easy loss of parts and cause operating cost big, with 9 60m ³It is example once that plate type heat exchanger cleaned in every month, needs 540 of gasket seals, and needs were 5760 in 1 year, 70 yuan on each pad, and annual expense is 40.32 ten thousand yuan.

Summary of the invention

Used heat exchanger is a plate type heat exchanger to the utility model in the existing ammonia distillation process in order to solve, and has problems such as the easy loss of parts, labor strength are big, operating cost height, and a kind of coke-oven plant spiral heat exchanger is provided.

The utility model is to adopt following technical scheme to realize: coke-oven plant's spiral heat exchanger, the distilled ammonia wastewater passage and the remained ammonia passage that comprise housing and be positioned at housing and constitute by spiral plate, innovative point of the present utility model is that the upper and lower end face of distilled ammonia wastewater passage connects with the housing upper and lower respectively, the housing upper and lower is respectively equipped with distilled ammonia wastewater import, the distilled ammonia wastewater outlet with the distilled ammonia wastewater channel connection, constitutes the fluid axial passage; The upper and lower end face of remained ammonia passage seals plate respectively, is respectively equipped with remained ammonia import, remained ammonia outlet along the housing central axis and along the housing circumferencial direction, constitutes fluid rotation direction passage.Adopt structural design of the present utility model, the distilled ammonia wastewater that enters the fluid axial passage carries out heat exchange with the remained ammonia that enters fluid rotation direction passage in housing, and in this process, impurity such as the tar that contains in the distilled ammonia wastewater rely on gravity longshore current axon to discharge housing bottom to passage, do not need manually to take apart to clear up.

Described housing below is provided with the steam inlet, in heat transfer process, and distilled ammonia wastewater temperature low excessively (below 50 ℃) and when causing tar to be set in the fluid axial passage, can blast steam by the steam inlet to purge the tar in the cleaning passage.

Described housing below is provided with the discharging hole that communicates with the remained ammonia passage; Housing top is provided with the gas vent that communicates with the remained ammonia passage, by gas vent and discharging hole, both can feed steam to the remained ammonia passage and be used for removing indirectly tar, also can feed water and be used for regular washing fluid rotation direction passage.

Compared with prior art, the utility model improves on the structure of existing common spiral heat exchanger, and be used for coke-oven plant's ammonia still process, not only improve simple in structure, the heat exchange effect is better, the most important thing is in heat transfer process tar thoroughly to be removed, and does not need the artificial unloading to clean, time saving and energy saving, the normal operation of guarantee producing, and up-front investment and operating cost are also lower, have certain popularization value.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Among the figure: the 1-housing; The 2-spiral plate; 3-distilled ammonia wastewater passage; 4-remained ammonia passage; The import of 5-distilled ammonia wastewater; The import of 6-remained ammonia; The 7-steam inlet; The 8-discharging hole; The 9-gas vent; The 10-sealing plate; The outlet of 11-distilled ammonia wastewater; The outlet of 12-remained ammonia.

The specific embodiment

Coke-oven plant's spiral heat exchanger, as shown in Figure 1, the distilled ammonia wastewater passage 3 and the remained ammonia passage 4 that comprise housing 1 and be positioned at housing and constitute by spiral plate 2, the upper and lower end face of distilled ammonia wastewater passage 3 connects with housing 1 upper and lower respectively, housing 1 upper and lower is respectively equipped with distilled ammonia wastewater import 5, the distilled ammonia wastewater outlet 11 that is communicated with distilled ammonia wastewater passage 3, constitutes the fluid axial passage; The upper and lower end face of remained ammonia passage 4 seals plate 10 respectively, is respectively equipped with remained ammonia import 6, remained ammonia outlet 12 along the housing central axis and along the housing circumferencial direction, constitutes fluid rotation direction passage.Housing 1 below is provided with steam inlet 7; Housing 1 below is provided with the discharging hole 8 that communicates with remained ammonia passage 4, and housing 1 top is provided with the gas vent 9 that communicates with remained ammonia passage 4.

In ammonia still process, the distilled ammonia wastewater (hot fluid) that is gone out by the ammonia still underflow enters fluid axial passage (being the distilled ammonia wastewater passage) by the distilled ammonia wastewater import of case top, and the remained ammonia (cold fluid) that is come by cold bulging workshop section enters fluid rotation direction passage (being the remained ammonia passage) by the remained ammonia import, cold fluid and hot fluid carries out indirect heat exchange respectively in passage separately, distilled ammonia wastewater after the final heat release is flowed out by the distilled ammonia wastewater outlet of housing bottom, remained ammonia after the heat absorption is then flowed out by the remained ammonia outlet, in this process, impurity such as the tar that contains in the distilled ammonia wastewater rely on gravity longshore current axon to discharge housing to passage.

Claims

1. coke-oven plant's spiral heat exchanger, the distilled ammonia wastewater passage (3) and the remained ammonia passage (4) that comprise housing (1) and be positioned at housing and constitute by spiral plate (2), the upper and lower end face that it is characterized in that distilled ammonia wastewater passage (3) connects with housing (1) upper and lower respectively, housing (1) upper and lower is respectively equipped with distilled ammonia wastewater import (5), the distilled ammonia wastewater outlet (11) that is communicated with distilled ammonia wastewater passage (3), constitutes the fluid axial passage; The upper and lower end face of remained ammonia passage (4) seals plate (10) respectively, is respectively equipped with remained ammonia import (6), remained ammonia outlet (12) along the housing central axis and along the housing circumferencial direction, constitutes fluid rotation direction passage.

2. coke-oven plant according to claim 1 spiral heat exchanger is characterized in that housing (1) below is provided with steam inlet (7).

3. coke-oven plant according to claim 1 and 2 spiral heat exchanger is characterized in that housing (1) below is provided with the discharging hole (8) that communicates with remained ammonia passage (4); Housing (1) top is provided with the gas vent (9) that communicates with remained ammonia passage (4).