Tecnologia Y Medio Ambiente

AlfaVap
Installation Manual

Contents
1

INTRODUCTION

1

2

THE PLATE EVAPORATOR SYSTEM

3

3

PLATE EVAPORATOR ARRANGEMENTS

5

3.1
3.2
3.3
3.4
4

Complete effect
Booster in series PE ⇒ Robert
Booster in series Robert ⇒ PE
Booster in parallel (pump)

PRODUCT OUTLET PIPE AND PRE-SEPARATION

4.1 Function
4.2 System Plate evaporator - Pre-separator (tee) - Mainseparator
5

LIQUID-VAPOR SEPARATOR

5.1
5.2
5.3
5.4
6

Function
Types of separators
Alfa Laval cyclone separator
Separation in existing evaporator

FLASH VESSEL

7.1 Function

CLEANING IN PLACE (CIP) SYSTEM

9.1 Function
9.2 Installation
9.3 Complete CIP System

24

26
29
33

33
33
36

PROTECTION SYSTEM

37

10.1 Function
10.2 Installation

Version 1.218
18
19
20

26

8.1 Venting system
8.2 Condensate removal system

10

18

24

STEAM SIDE

9

15
15

21
21

RECIRCULATION OF PRODUCT

8

15

21

6.1 Function
6.2 Installation
7

5
7
9
12

37
37

AlfaVap Installation Manual

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11

START & STOP INSTRUCTIONS

11.1 Start-up procedure
11.2 Shut-down procedure
12

40
41

PRODUCT SIDEPRESSURE DROP AND FLASH VESSEL ELEVATION

12.1 With flash vessel
12.2 Without flash vessel
13

42

43
48

STEAM AND CONDENSATE VELOCITIES

13.1 Steam
13.2 Self-venting pipes
13.3 Liquid
14

40

52

52
52
53

GLOSSARY

54

APPENDIX: FULL SCALE INSTALLATION DRAWINGS

Complete effect
Booster in series PE ⇒ Robert
Booster in series Robert ⇒ PE, without pump
Booster inseries Robert ⇒ PE, with pump
Booster in parallel
Recirculation of product
Venting system
Condensate removal system, large plant
Condensate removal system, small plant
Cleaning in place - Location of connections 1
Cleaning in place - Location of connections 2
Example of CIP system layout
Protection system for single effect and booster
Protection system for complete PE station
Tee on theproduct outlet pipe from the PE

Version 1.2

AlfaVap Installation Manual

ii

1 Introduction
The plate evaporator (PE) differs in many ways from other traditional types of
evaporators. In the context of integration in an evaporation plant, its perhaps most
unique feature is its small hold-up volume, which result in rapid process dynamics and
short response time. Thus, installation ofplate evaporators requires special attention.
This manual is intended to be a “best practice” guide to all parties involved in the
design and installation of plate evaporators. The content is the result of experience
accumulated from several hundred plate evaporator installations around the world.
Readers not familiar with the plate evaporator are strongly urged to read the brief
introductionin Chapter 2.
Protection system
Chapter 10

Cleaning in
place system
Chapter 9

Cassettes

Complete plate
evaporator system

Condensate
removal system
Chapter 8.2

Liquid-vapor
separation
Chapters 4 & 5
Venting system
Chapter 8.1

Figure 1.1

Plate evap.
arrangements
Chapter 3

Flash vessel
(optional)
Chapter 6

Schematic illustration of the various sub-systemsthat make up a
complete plate evaporator installation.

Figure 1.1 is an illustration of how to find your way in this manual. Each sub-system
has its own chapter or section. Different types of arrangements of the plate evaporator
are described in Chapter 3; the reader can go directly to the section relevant to the
particular type of installation. Issues relating to separation of theconcentrated liquid
and vapor are discussed in Chapters 4 and 5. Flash vessels and their use are discussed
in Chapter 6. Considerations for recirculation of product are found in Chapter 7.
Chapter 8 describes the steam side systems venting and condensate removal. Auxiliary
systems such as CIP and protection are taken up in Chapters 9 and 10. Start & stop
instructions are covered in Chapter 11. A...