CN105617951A

CN105617951A - Spouted circulating fluidized bed

Info

Publication number: CN105617951A
Application number: CN201410580921.XA
Authority: CN
Inventors: 郝青
Original assignee: Shaanxi Yuhang Electronic Co Ltd
Current assignee: Shaanxi Yuhang Electronic Co Ltd
Priority date: 2014-10-27
Filing date: 2014-10-27
Publication date: 2016-06-01

Abstract

The present invention relates to the field of chemical industry equipment, particularly to a spouted circulating fluidized bed reactor, wherein the spouted circulating fluidized bed comprises a monitoring system, a material feeding system, a main reactor, a gas-solid separation system, a filter, a gas purification system, a gas recovery system and a pre-heating system, and the monitoring system, the material feeding system, the main reactor, the gas-solid separation system, the filter, the gas purification system, the gas recovery system and the pre-heating system are sequentially connected in a head-tail-connection manner. According to the present invention, with the spouted circulating fluidized bed, the disadvantages that the contact of the gas phase and the solid phase in the ring-gap region is poor and the spouting under the high bed layer is instable are overcome, the phenomenon that layering or section communication is easily generated inside the fluidized bed is avoided, the generation of the dead region on the bottom portion of the ring-gap region and the agglomeration of the easily bonded particles are basically eliminated, the non-condensable gas is adopted as the circulating fluidized bed so as to avoid the use of the expensive external inert gas, and the advantages of easy industrialized scale-up and low operating cost are provided.

Description

A kind of spray-moving type recirculating fluidized bed

Technical field

The present invention relates to field of chemical equipment, be specifically related to a kind of spout circulation formula fluidized-bed reactor.

Background technology

Fluidized-bed reactor is mainly used in aromatization, traditional fluidized-bed reactor includes the air inlet/outlet of tower body, tower body top and bottom, air inlet place, bottom arranges a gas distributor, catalyst is from injecting reactor near sparger outlets position, the gas Homogeneous phase mixing come in distributor, and move up under the drive of gas speed, reactor top, catalyst is separated from the gas under gravity, and derives reactor by delivery line. The shortcoming of this flowing bed reactor is: gas only through being once distributed, gas skewness, and easily produce bigger bubble, back-mixing is bigger, short circuit and channel also easily occur, affects effective time of contact and the contact area of gas and catalyst, reduce reaction efficiency. Reaction depth can not be controlled flexibly, easily cause the secondary response of purpose product, and reduce the yield of purpose product.

Summary of the invention

It is contemplated that propose a kind of spout circulation formula fluidized-bed reactor.

Technical program of the present invention lies in:

A kind of spray-moving type recirculating fluidized bed, is made up of monitoring system, feed system, main reactor, gas solid separation system, filter, gas purge system, gas recovery system and the preheating system that head and the tail connect successively.

Preferably, described main reactor is spouted fluidized bed bioreactor.

Preferably, described feed system is vibration type feeder, and is connected with spouted fluidized bed bioreactor by screw rod.

It is highly preferred that described spouted fluidized bed bioreactor outsourcing has a layered heating.

Or preferably, described gas solid separation system is divided into the two-stage segregation apparatus being sequentially connected with, respectively primary cyclone and primary cyclone.

It is highly preferred that connect one-level collection charcoal case bottom described primary cyclone, bottom secondary cyclone, connect two grades of collection charcoal casees.

Or preferably, described condenser system is bubbling type secondary spray condenser, and is respectively equipped with water inlet pipe and outlet pipe, and bottom is provided with circulating pump.

Or preferably, described gas purge system is consisted of circulation line and emptying or recovery pipeline connection surge tank the roots blower being sequentially connected with.

Or preferably, described screw rod connects a stepless frequency modulation motor.

The method have technical effect that:

Instant invention overcomes gas-particle two-phase contact difference and the shortcoming of spouted instability under high bed in annular space district, avoid and layering easily occurs in fluid bed or saves logical phenomenon, essentially eliminate the appearance of bottom dead, annular space district and the reunion of easy bonded particulate, to condensable gases not use as recirculating fluidized bed simultaneously, avoid using outside expensive noble gas, there is equipment and be prone to industrialization amplification and the relatively low advantage of operating cost.

Accompanying drawing explanation

Fig. 1 is the device schematic diagram of a kind of spray-moving type recirculating fluidized bed of the present invention.

Wherein, 1-monitors system, 2-stepless frequency modulation motor; 3-vibration type feeder; 4-screw rod; The spouted fluidized bed bioreactor of 5-; 6-heater; 7-primary cyclone; 8-one-level collection charcoal case; 9-secondary cyclone; 10-bis-grades collects charcoal case; 11-water inlet pipe; 12-outlet pipe; 13-bubbling type secondary spray condenser; 14-filter; 15-circulating pump; 16-roots blower; 17-circulation line; 18-emptying or recovery; 19-surge tank; 20-preheating system.

Detailed description of the invention

A kind of spray-moving type recirculating fluidized bed, is made up of monitoring system 1, feed system, main reactor, gas solid separation system, filter 14, gas purge system, gas recovery system and the preheating system 20 that head and the tail connect successively. Main reactor is spouted fluidized bed bioreactor 5. Described feed system is vibration type feeder 3, and is connected with spouted fluidized bed bioreactor 5 by screw rod 4. A layered heating 6 it is surrounded by outside described spouted fluidized bed bioreactor 5. Gas solid separation system is divided into the two-stage segregation apparatus being sequentially connected with, respectively primary cyclone 7 and primary cyclone 9. Connect one-level collection charcoal case 8 bottom primary cyclone 7, bottom secondary cyclone 9, connect two grades of collection charcoal casees 10. Condenser system is bubbling type secondary spray condenser 13, and is respectively equipped with water inlet pipe 11 and outlet pipe 12, and bottom is provided with circulating pump 15. Gas purge system is connected surge tank 19 by the roots blower 16 being sequentially connected with formed by circulation line 17 and emptying or recovery pipeline 18. Screw rod 4 connects a stepless frequency modulation motor 2.

Claims

1. a spray-moving type recirculating fluidized bed, it is characterised in that: it is made up of head and the tail connect successively monitoring system (1), feed system, main reactor, gas solid separation system, filter (14), gas purge system, gas recovery system and preheating system (20).

2. such as claim 1 spray-moving type recirculating fluidized bed, it is characterised in that: described main reactor is spouted fluidized bed bioreactor (5).

3. such as claim 1 spray-moving type recirculating fluidized bed, it is characterised in that: described feed system is vibration type feeder (3), and is connected with spouted fluidized bed bioreactor (5) by screw rod (4).

4. such as claim 2 spray-moving type recirculating fluidized bed, it is characterised in that: it is surrounded by a layered heating (6) outside described spouted fluidized bed bioreactor (5).

5. such as claim 2 spray-moving type recirculating fluidized bed, it is characterised in that: described gas solid separation system is divided into the two-stage segregation apparatus being sequentially connected with, respectively primary cyclone (7) and primary cyclone (9).

6. such as claim 5 spray-moving type recirculating fluidized bed, it is characterised in that: described primary cyclone (7) bottom connects one-level collection charcoal case (8), and secondary cyclone (9) bottom connects two grades of collection charcoal case (10).

7. such as claim 1 spray-moving type recirculating fluidized bed, it is characterised in that: described condenser system is bubbling type secondary spray condenser (13), and is respectively equipped with water inlet pipe (11) and outlet pipe (12), and bottom is provided with circulating pump (15).

8. such as claim 7 spray-moving type recirculating fluidized bed, it is characterised in that: described gas purge system is consisted of circulation line (17) and emptying or recovery pipeline (18) connection surge tank (19) the roots blower (16) being sequentially connected with.

9. such as claim 3 spray-moving type recirculating fluidized bed, it is characterised in that: described screw rod (4) connects a stepless frequency modulation motor (2).