CN216653494U

CN216653494U - Low-pressure steam condensate recovery processing device in formaldehyde workshop section

Info

Publication number: CN216653494U
Application number: CN202123123935.3U
Authority: CN
Inventors: 师文涛; 刘月; 陈涛; 安明哲; 刘佳; 张军
Original assignee: Hancheng Black Cat Chemical Co ltd; Shaanxi Heimao Coking Co ltd
Current assignee: Hancheng Black Cat Chemical Co ltd; Shaanxi Heimao Coking Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-06-03
Anticipated expiration: 2031-12-13

Abstract

The utility model belongs to the technical field of chemical waste liquid treatment, and relates to a low-pressure steam condensate recovery treatment device in a formaldehyde workshop section, which comprises a low-pressure steam main pipe and a deoxidizing water tank which are communicated with each other; the deoxidizing water tank is provided with a liquid inlet and a liquid outlet communicated with the liquid inlet; the liquid inlet is communicated with a low-pressure steam main pipe; and a dosing pipeline communicated with the inside of the deoxygenation water tank is also arranged on the deoxygenation water tank, and a deoxygenation agent layer is filled in the dosing pipeline. The utility model can effectively recover low-pressure steam condensate, and the condensate is treated and recycled, thereby realizing energy conservation and environmental protection; and the heat exchange effect of the methanol steam preheater is improved, and the production efficiency is improved.

Description

Low-pressure steam condensate recovery processing device in formaldehyde workshop section

Technical Field

The utility model belongs to the technical field of chemical waste liquid treatment, and relates to a low-pressure steam condensate recovery and treatment device in a formaldehyde workshop section.

Background

A large amount of low-pressure steam condensate can be generated in the existing formaldehyde workshop section device, and the existing treatment method for the condensate is as follows: the collected condensate is conveyed to a steam condensate tank of a BDO synthesis section through a pipeline, however, the condensate cannot be conveyed due to the fact that the pressure of the condensate tank is higher than the pressure of a low-pressure steam condensate pipeline, the condensate is remained in the pipeline and cannot be discharged, meanwhile, a methanol steam preheater needs steam for heat exchange, and the condensate cannot be discharged, so that the steam cannot enter a heat exchanger for heat exchange, the heat exchange effect is poor, and the production efficiency is reduced; therefore, the condensate in the pipeline is discharged by adopting a local discharge method, so that the steam enters the preheater for heat exchange, and although the heat exchange problem is solved, the discharged low-pressure steam condensate can influence the field environment and cause harm.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems of the existing condensate treatment, the utility model provides a low-pressure steam condensate recovery treatment device in a formaldehyde workshop section, which can effectively recover low-pressure steam condensate and treat and recycle the condensate, thereby realizing energy conservation and environmental protection; and the heat exchange effect of the methanol steam preheater is improved, and the production efficiency is improved.

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

the utility model provides a low pressure steam condensate recovery processing device in formaldehyde workshop section, is including the low pressure steam house steward and the deoxidization water tank that are linked together.

Further, a liquid inlet and a liquid outlet communicated with the liquid inlet are formed in the deoxygenation water tank; the liquid inlet is communicated with a low-pressure steam main pipe.

Furthermore, a dosing pipeline communicated with the inside of the deoxidizing water tank is further arranged on the deoxidizing water tank.

Furthermore, the chemical feeding pipeline is filled with an oxygen scavenger layer.

Further, the oxygen scavenger layer is a sodium sulfite oxygen scavenger layer or a hydrazine oxygen scavenger layer.

Furthermore, the low-pressure steam condensate recovery processing device in the formaldehyde workshop section further comprises a flange arranged between the low-pressure steam main pipe and the liquid inlet.

Furthermore, a control regulating valve is arranged between the flange and the liquid inlet.

Furthermore, the low-pressure steam condensate recovery processing device in the formaldehyde workshop section also comprises a collecting tank communicated with the liquid outlet.

The utility model has the beneficial effects that: according to the utility model, the deoxygenation water tank is arranged, the low-pressure steam condensate in the formaldehyde working section is discharged into the deoxygenation water tank, and the gas in the condensate is removed through the deoxygenation water tank, so that the effective collection of the condensate is realized, the phenomenon of poor heat exchange effect of the methanol steam preheater caused by the fact that the condensate cannot be discharged is avoided, and the heat exchange effect is improved; and the low-pressure steam condensate can be reused in the system after being treated, so that the resource is saved, the harm to the environment is reduced, the purposes of energy conservation and environmental protection are achieved, the production cost is further reduced, and economic benefits are brought to enterprises.

Drawings

FIG. 1 is a schematic diagram of a conventional low pressure steam condensate recovery process;

FIG. 2 is a schematic view of a low-pressure steam condensate recovery processing device provided by the present invention;

wherein:

1-a steam condensate tank; 2-a valve; 3-deoxidizing water tank; 4, a flange; 5-control regulating valve, 6-collecting tank.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1, in the low-pressure steam condensate of the existing formaldehyde device, collected condensate is conveyed to a steam condensate tank 1 in a BDO synthesis section through a condensate header pipe and a valve 2, but the condensate cannot be conveyed because the pressure of the condensate tank 1 is higher than that of the low-pressure steam condensate header pipe. Therefore, the other method is to discharge the methanol vapor in situ, but the heat exchange effect of the methanol vapor preheater is poor, and the on-site environment is influenced.

The idea of this technique is to remove the blind plate at the end of the low-pressure steam condensate header pipe, connect pipeline and valve to the deoxidization water tank all the way, close valve 2 that originally carried to steam condensate tank 1 simultaneously.

Examples

Referring to fig. 2, the low-pressure steam condensate recovery processing device in the formaldehyde workshop section provided by the embodiment includes a low-pressure steam main pipe and an oxygen removal water tank 3 which are communicated with each other.

The deoxidizing water tank 3 is provided with a liquid inlet and a liquid outlet communicated with the liquid inlet; the inlet communicates with low pressure steam house steward, still includes the collecting vat 6 that is linked together with the liquid outlet, and the steam condensate after handling discharges to recycling in the collecting vat 6, and collecting vat 6 plays the effect of collecting, still has the cushioning effect, according to the technology of actually recycling, still can carry out further processing or quality index (like pH valve etc.) to the condensate and adjust, promotes the effect of recycling.

Still be provided with on the deoxidization water tank 3 with the inside medicine pipeline that adds that is linked together of deoxidization water tank 3, fill the deoxidization agent layer in the medicine pipeline, add the deoxidization agent in the deoxidization water tank 3, the efficiency of getting rid of oxygen in the condensate is accelerated.

In order to meet the technical requirements of low-pressure steam condensate treatment and ensure the deoxidization effect; the volume of the deoxygenation water tank 3 is 40m when in work³(ii) a The design pressure is 0.068 MPa; the working pressure is 0.02 MPa; the design temperature is-10 to 200 ℃; the working temperature is 104 ℃; the material is alloy steel Q345R.

The deoxidant layer is a sodium sulfite deoxidant layer or a hydrazine deoxidant layer, and because the steam condensate pressure is low, oxygen gas in the low-pressure steam condensate can be effectively removed through the sodium sulfite deoxidant layer or the hydrazine deoxidant layer.

The low-pressure steam condensate recovery processing device in the formaldehyde workshop section also comprises a flange 4 arranged between the low-pressure steam main pipe and the liquid inlet pipe. A control regulating valve 5 is arranged between the flange 4 and the liquid inlet. The control regulating valve 5 is a manual valve, can regulate and control the flow of low-pressure steam condensate entering the deoxygenation water tank 3, and ensures the pressure in the deoxygenation water tank 3.

In the embodiment, the blind plate at the other end of the existing low-pressure steam main pipe is removed and is arranged as the flange 4, and the flange 4 is communicated with the deoxygenation water tank 3, so that low-pressure steam condensate flows into the deoxygenation water tank 3; condensate is obtained after deoxidization by the deoxidant, and meanwhile, a valve 2 on an original treatment pipeline is closed, so that low-pressure steam condensate can be prevented from flowing into a pipeline in the direction of a steam condensate tank 1 and continuously flowing into a deoxidization water tank 3 under the action of low pressure of the low-pressure steam condensate, and the steam condensate in a formaldehyde working section can be smoothly treated and collected; meanwhile, the condensate is used as a branch (methanol steam preheater) condensate in a steam condensate system of the formaldehyde device, and after the low-pressure steam condensate of the formaldehyde working section is recovered and treated. The heat exchange effect of the methanol steam preheater is further improved, and the production efficiency is improved; after being treated by the deoxidizing water tank 3, the condensate enters the collecting tank 6 to be collected and then is reused as boiler circulating water, so that resources are saved.

Claims

1. The utility model provides a low pressure steam lime set recovery processing device in formaldehyde workshop section which characterized in that: comprises a low-pressure steam main pipe and a deaerating water tank (3) which are communicated.

2. The low-pressure steam condensate recovery processing device in the formaldehyde workshop section according to claim 1, characterized in that: a liquid inlet and a liquid outlet communicated with the liquid inlet are formed in the deoxidizing water tank (3); the liquid inlet is communicated with a low-pressure steam main pipe.

3. The low-pressure steam condensate recovery processing device in the formaldehyde workshop section according to claim 2, characterized in that: and a dosing pipeline communicated with the inside of the deoxidizing water tank (3) is also arranged on the deoxidizing water tank (3).

4. The low-pressure steam condensate recovery processing device in the formaldehyde workshop section according to claim 3, characterized in that: and the chemical feeding pipeline is filled with a deoxidant layer.

5. The low-pressure steam condensate recovery processing device in the formaldehyde workshop section according to claim 4, characterized in that: the deoxidant layer is a sodium sulfite deoxidant layer or a hydrazine deoxidant layer.

6. The low-pressure steam condensate recycling device in the formaldehyde workshop section according to any one of claims 2 to 5, characterized in that: the low-pressure steam condensate recovery processing device in the formaldehyde workshop section further comprises a flange (4) arranged between the low-pressure steam main pipe and the liquid inlet.

7. The low-pressure steam condensate recovery processing device in the formaldehyde workshop section according to claim 6, characterized in that: a control regulating valve (5) is arranged between the flange (4) and the liquid inlet.

8. The low-pressure steam condensate recovery processing device in the formaldehyde workshop section according to claim 7, characterized in that: the low-pressure steam condensate recovery processing device in the formaldehyde workshop section further comprises a collecting tank (6) communicated with the liquid outlet.